HomeMy WebLinkAboutFile Documents.1432 Crystal Lake Rd.0025.2019 (12).ARBK85-03-01136 ML39
Installation and Operating Instructions
MODEL NO. ML39 FULLVIEW DIRECT VENT GAS FIREPLACE HEATER
WARNING: If the information in these instructions
is not followed exactly, a fire or explosion may
result causing property damage, personal injury or
loss of life.
AVERTISSEMENT. Assurez-vous de bien suivre les
instructions données dans cette notice pour réduire au
minimum le risque d'incendie ou d'explosion ou pour
éviter tout dommage matériel, toute blessure ou la mort.
- Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any other
appliance.
- WHAT TO DO IF YOU SMELL GAS
•Do not try to light any appliance.
•Do not touch any electrical switch; do not
use any phone in your building.
•Immediately call your gas supplier from a
neighbor’s phone. Follow the gas supplier’s
instructions.
•If you cannot reach your gas supplier, call
the fire department.
- Installation and service must be performed by a
qualified installer, service agency or the gas
supplier.
Ne pas entreposer ni utiliser d'essence ni d'autres vapeurs
ou liquids inflammables dans le voisinage de cet appareil
ou de tout autre appareil.
- QUE FAIRE SI VOUS SENTEZ UNE ODEUR DE GAZ:
• Ne pas tenter d'allumer d'appareil.
• Ne touchez à aucun interrupteur. Ne pas vous servir des
téléphones se trouvant dans le bâtiment où vous trouvez.
• Appelez immédiatement votre fournisseur de gaz depuis
un voisin. Suivez les instructions du fournisseur.
• Si vous ne pouvez rejoindre le fournisseur de gaz,
appelez le service des incendies.
- L'installation et l'entretien doivent être assurés par un
installateur ou un service d'entretien qualifié ou par le
fournisseur de gaz.
This appliance may be installed in an aftermarket,
permanently located, manufactured home (USA
only) or mobile home, where not prohibited by local
codes.
This appliance is only for use with the type of gas
indicated on the rating plate. This appliance is not
convertible for use with other gasses, unless a
certified kit is used.
Cet appareil peut être installé dans une maison
préfabriquée (É.-U. seulement) ou mobile déjà installée à
demeure si les règlements locaux le permettent.
Cet appareil doit être utilisé uniquement avec les types de
gaz indiqués sur la plaque signalétique. Une trousse de
conversion est fournie avec cet appareil.
A barrier designed to reduce the risk of burns from
the hot viewing glass is provided with this appliance
and must be installed.
Une barrière conçue pour réduire le risque de brûlures
du verre chaud est fournie avec cet appareil et doit être
installée.
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HOMEOWNER NOTES
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READ ME FIRST
1.1 CAUTION STATEMENTS TO PARENTS OF YOUNG CHILDREN
If this fireplace is inst alled in an isolated bedroom, study or other room, always operate this appliance
in thermostatic temperature -controlled mode. Do not operate in Manual mode. Doing so can lead to
very high room temperatures which can be hazardous to the room occupants’ heal th.
Do not place young children in cribs, bassinets or the like in the vicinity of this appliance. Young
children may be vulnerable to high temperatures that this fireplace can create locally.
Young children should be carefully s upervised and never left unattended when they are in the same
room as the fireplace. Toddlers, young children and others may be susceptible to accidental contact
burns. A physical barrier is recommended if there are at risk individuals in the house. To res trict access
to a firepla ce or stove, install an adjustable safety gate to keep toddlers, young children and other at -
risk individuals out of the room and away from hot surfaces. This physical barrier is in addition to the
required glass barrier Screen.
1.2 INITIAL FIRING AND CURING PROCEDURE
This product requires an initial heat curing cycle during which some materials used in the manufacturing process will burn
off and the powder paint goes through a hardening cycle. During the initial curing phase, some smok e and odor will be
emitted. This is normal.
The installer should perform these initial curing cycle procedures as the final step in the installation process before
finishing materials are installed around this fireplace. See chapter 3.1.1 Mendota Fireplace Curing Instructions. Read and
follow all instructions given in this Chapter and perform the 3-step curing cycle.
After the 3-step curing cycle has been completed, all smoking will have stopped. Some slight odors may remain. With
subsequent use of this Fireplace, odors will slowly dissipate and disappear.
ODOR RISKS
If this appliance is not operated for an extended period (three months or longer), when first fired
again, expect odors of burnt du st and lint; just like when turning on your home heating system for the
first time in the Fall.
1.3 HOT SURFACES ARE NORMAL
Be aware that the surface in front of, above and adjacent to this heater appliance can be too hot to touch. As long as all
required clearances to combustibles are met and the required finishing materials are used, this appliance will perform
safely. Note that the exposed surfaces immediately surrounding the Fireplace can have surface temperatures that are too
hot to touch. This level of surface temperature is considered normal and does not indicate any hazardous situation.
WARNING: The supplied barrier screen must be installed , always , when this fireplace is in operation.
Do not place any object directly in front (within 60”) or directly ab ove (on the front edge of the
mantel). This is a heating appliance. Areas directly in front and above this appliance will b e very hot
and can damage most household objects if placed too close. Keep Furniture pieces at least 60” away
in front of the barrie r screen.
1.4 PERIODIC AND ANNUAL CLEANING ARE REQUIRED
See Required Periodic Inspections, Chapter 6.1 and Required Annual Maintenance, Chapter 6.3. Periodic and Annual
cleaning and general services are required at least once a year in the Summer or early Fall. Changing remote control
batteries at least every 6 months is required; or more frequently based upon usage frequency. Cleaning pilot flame sensor
rod, sparker rod and pilot hood body is required at least once per year. Cleaning of burner ports, gas orifice areas is
required once a year due to insects’ nesting probability due to Merc aptan addition in Natural Gas (Mercaptan has been
known to attracts insects).
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Table of Contents
1.1 CAUTION STATEMENTS TO PARENTS OF YOUNG CHILDREN 3
1.2 INITIAL FIRING AND CURING PROCEDURE .......... 3
1.3 HOT SURFACES ARE NORMAL ............................ 3
1.4 PERIODIC AND ANNUAL CLEANING ARE REQUIRED .......... 3
2.1 SAFETY AND WARNING INFORMATION .............. 6
2.2 SAFETY WARNINGS ................................................ 7
2.3 REQUIREMENTS FOR THE COMMONWEALTH OF MASS. . 10
3.1 GENERAL TECHNICAL REFERENCES ........................... 11
3.2 MECHANICAL TECHNICAL REFERENCES ...................... 13
3.2.12.4.1 Paint Types Approved for Use ..................................... 28
3.2.12.4.2 Sealants Type Approved for Use.................................. 28
3.2.12.4.3 Wood Application Cautions ......................................... 28
3.3 ELECTRICAL TECHNICAL REFERENCES ........................ 39
3.4 PLUMBING TECHNICAL REFERENCES ......................... 42
4.1 INSTALLATION CHECKLIST ...................................... 46
4.2 UNPACKING THE FIREPLACE ................................... 47
4.3 CONTENTS OF THE MANUAL PACKET ........................ 48
4.4 WHAT IS NOT INCLUDED WITH THIS APPLIANCE? ......... 48
4.5 UNBOLTING FIREPLACE FROM PALLET ....................... 48
4.6 BENDING UP THE SHIPPING CLIPS ............................. 49
4.7 TO REMOVE DOOR .............................................. 50
4.8 TO REPLACE DOOR .............................................. 50
4.9 LIGHT BULB AND LIGHT LENS INSTALLATION .............. 51
4.10 NATURAL GAS TO LPG CONVERSION ....................... 52
4.11 VENTING ........................................................... 57
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4.12 LOG SET/ MEDIA INSTALLATION .............................. 65
4.13 LIGHTING CHECKLIST ............................................ 65
4.14 AIR SHUTTER CONTROL AND FLAME APPEARANCE ....... 66
5.1 AESTHETIC CONSIDERATIONS .................................. 67
5.2 HEATING PERFORMANCE ....................................... 67
5.3 IMPORTANT INFORMATION FOR HOMEOWNER ............ 67
5.4 OPERATING INFORMATION .............................. 68
5.5 REMOTE CONTROL OPERATING INSTRUCTIONS ........... 70
5.6 HOW DO I CHANGE FROM CELSIUS TO FAHRENHEIT? .... 71
5.7 IPI AND CPI MODES ............................................ 72
5.8 FIRST TIME LIGHTING INSTRUCTIONS ........................ 72
5.9 FREQUENTLY ASKED QUESTIONS ..................... 74
6.1 REQUIRED PERIODIC INSPECTIONS ........................... 78
6.2 CLEANING VIEWING GLASS .................................... 78
6.3 REQUIRED ANNUAL MAINTENANCE ......................... 78
6.4 OVER FIRING OR UNDER FIRING OF BURNER .............. 79
6.5 BURNER FLAME HEIGHTS REFERENCE DIAGRAM ......... 79
6.6 REPLACEMENT PARTS INFORMATION .............. 80
7.1 INSTALLER VERIFICATION CHECKLIST ........................ 84
7.2 WARRANTY POLICY STATEMENT ............................. 85
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GENERAL INFORMATION
2.1 SAFETY AND WARNING INFORMATION
Building Permit & Inspection Requirements
All installations of Mendota Fireplaces must comply with all the requirements stated in this Installation and Operating Manual.
The dealer and/or installer must obtain all required building permits and inspection approvals from the local building inspec tion
department or the local jurisdiction. To validate warranty coverage, Mendota may require fa csimile copies of the building
permit and inspection approval forms. Failure to provide adequate proof that the installation conforms to all local requireme nts
and the requirements stated in the Installation and User Manual will void all applicable warrant ies.
Other Cautions
CAUTION : Each installation must conform to all local, state and national codes. Refer to the national fuel
gas code and local zoning and code authorities for details on installation requirements. The Mendota
Fireplace must be vented to the ou tside in accordance with the latest edition of the National Fuel Gas Code.
In the absence of local codes, the installation must conform to the most current edition of the National Fuel
Gas Code AN SI Z223.1, also known as NFPA 54.
CAUTION : The Mendot a Fire place may be installed in a manufactured (mobile) home after the first sale of
the home. Manufactured home (mobile home) installation must conform with the Manufactured Home
Construction and Safety Standard, Title 24 CFR, Part 3280, or, when such a s tandar d is not applicable, the
Standard for Manufactured Home Installations, ANSI A225.1/NFPA 501A, or CSA Z240.4 -Gas Equipped Mobile
Housing. Consult your local building official. NOTE: For mobile home installations, unit must be bolted to
the Woodburning firep lace firebox floor and properly grounded.
INSTALLER : Leave this manual with the appliance. CONSUME R: Retain this manual for future reference.
INSTALLATEUR : Laissez cette notice avec l’appareil. CONSOMMATEUR : Conservez cette notice pour
consultat ion ul térieure .
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2.2 SAFETY WARNINGS
HIGH-ALTITUDE INSTALLATION INFORMATION: Prior to installing at altitudes higher than 7,500 ft., understand the need for gas
input derating. Contact Mendota Technical Service for support.
INSTALLER NOTE: These instructions are to remain with homeowner.
Be sure to read and understand all instructions carefully before starting the fireplace. Failure to follow these instructions may
result in a possible fire hazard leading to property loss, injury or even death and will void all warranty.
FOR YOUR SAFETY: A qualified installer, service agency, or
the gas supplier must perform installation and service.
Do not store or use gasoline or other flammable vapors
and liquids in the vicinity of this or any other appliance.
WARNING: Do not operate this appliance with the glass
removed, cracked or broken. A licensed or qualified
person should do replacement of glass.
AVERTISSEMENT: Ne pas utiliser l’appareil si le panneau
frontal en verre n’est pas en place, est craqué ou brisé.
Confiez le remplacement du panneau à un technicien
agréé.
WARNING: Mendota gas fireplaces are heat producing
appliances. Do not burn wood, paper or other materials in
this fireplace. This fireplace is designed as a supplemental
heat source. It is advisable to have an alternative primary
heat supply.
WARNING: Improper installation, adjustment,
alteration, service or maintenance can cause injury or
property damage. Refer to this manual. For
assistance or additional information consult a
qualified installer, service agency or the gas supplier.
In the Commonwealth of Massachusetts:
Installation must be performed by a licensed plumber or
gas fitter; a CO detector shall be installed in the room
where the appliance is installed.
This appliance may be installed in an aftermarket,
permanently located, manufactured (mobile) home
(USA Only), where not prohibited by local codes.
This appliance is only for use with the type(s) of gas
indicated on the rating plate. This appliance is not
convertible for use with other gases, unless a certified
conversion kit is used.
Cet appareil peut être installé dans un maison
préfabriquée (mobile) déjà installée à demeure si les
règlements locaux le permettent.
Cet appareil doit être utilisé uniquement avec les types
de gas indiqués sur la plaque signalétique. Ne pas
l’utiliser avec d’autres gas sauf si un kitde conversion
certifié est installé.
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Safety Standards and Warnings
Do not operate this appliance with the glass removed, cracked or broken. Only glass doors certified with this
appliance shall be used.
A barrier designed to reduce the risk of burns from the hot viewing glass is pro vided with this appliance and
must be installed. If the barrier becomes damaged, the barrier shall be replaced with the manufacturer's
barrier for this appliance.
Any Barrier Screen or guard removed for servicing must be replaced before operating fireplac e.
Tout écran ou protecteur retiré pour permettre l’entretien de l’appareil doit être remis en place avant de
mettre l’appareil en marche.
This unit is not for use with solid fuel.
Ne pas utiliser avec du combustible solide.
Installation and repair shoul d be performe d by a qualified service person. The fireplace and venting system
should be inspected before initial use and at least annually by a professional service person. Mo re frequent
cleaning may be required due to excessive lint from carpeting, beddi ng, material, etc. It is imperative that
the unit’s control compartment, burners and circulating air passageways are kept clean to provide for
adequate combustion and ventilati on air.
L’installation et la réparation devrait être confiées à un technicien q ualifié. L’appareil devrait faire l’objet
d’une inspection par un technicien professionnel avant d’être utilisé et au moins une fois l’an par la suite.
Des nettoyages plus fréq uents peuvent être nécessaires si les tapis, la literie, et cetera produisent un e
quantité importante de poussière. Il est essentiel que les compartiments abritant les commandes, les
brûleurs et les conduits de circulation d’air de l’appareil soient tenus propres.
Always keep the fireplace clear and free from combustible materials, ga soline, and other flammable vapors
and liquids.
Never obstruct the flow of combustion and ventilation air. Keep the front of the fireplace clear of all
obstacles and materials for servicing and proper operation. Use only Mendota approved Screens, Fronts an d
Trim Kits.
Due to high temperature, the fireplace should be located out of traffic areas and away from furniture and
draperies. En raison des températures élevées, l’appareil devrait être installé dans un endroit où il y a peu
de circulation et loin du m obilier et des tentures.
Clothing or flammable material should not be placed on or near the fireplace.
On ne devrait pas placer de vêtements ni d’autres matières inflammables sur l’appareil ni à proximité.
Children and adults should be alerted to the haza rds of high surface temperature and should stay away to
avoid burns or clothing ignition. The door glass, surrounding walls and objects can be too hot to touch.
Les enfants et les adultes devraient être informés des dangers que posent les températures de surface
élevées et se tenir à distance afin d’éviter des brûlures ou que leurs vêtements ne s’enflamment.
Young children should be carefully supervised when they are in the sam e room as the fireplace. Toddlers,
young children and others may be susceptible to accidental contact burns. A physical barrier is
recommended if there are at risk individuals in the house. To restrict access to a fireplace or stove, install
an adjustable safety gate to keep toddlers, young children and other at -risk individuals out o f the room and
away from hot surfaces. This physical barrier is in addition to the required glass barrier Screen .
Les jeunes enfants devraient être surveillés étroitement lorsq u’ils se trouvent dans la même pièce que
l’appareil. Les tout petits, les jeunes enfants ou les adultes peuvent subir des brûlures s’ils viennent en
contact avec la surface chaude. Il est recommandé d’installer une barrière physique si des personnes à
risq ues habitent la maison. Pour empêcher l’accès à un foyer ou à un poêle, installe z une barrière de
sécurité; cette mesure empêchera les tout petits, les jeunes enfants et toute autre personne à risque
d’avoir accès à la pièce et aux surfaces chaudes.
These units must use one of the vent systems described in the Flue Venting section of this manual.
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This gas fireplace and vent system must be vented directly to the outside and must never be attached to a
chimney serving a separate solid fuel -burning fireplace. Each gas fireplace must use a separate vent system.
Common vent systems are proh ibited .
The vent system for this fireplace must be periodically examined by a qualified service agency to maintain
venting performance and safety . If the vent -air intake system is disassembled for any reason, reinstall per
the instructions provided for the initial installation.
Inspect the external vent cap on regular basis (monthly) to make sure that no debris is interfering with the
airflow. The flow of combustion and ventilation air are not to be obstructed .
Do not abuse the glass door assembly by striki ng the glass, slamming the door shut, etc.
Use only authorized parts and materials obtained from Mendota Hearth when replacing defective or
damaged glass , log sets, media, firebox inner liners or trim kits .
Do not use abrasive cleaners on the glass door a ssembly. Do not attempt to clean the glass door when it is
hot. Use Mendota recommended cleaner, KelKem.
Turn off the gas before servicing this fireplace. It i s recommended that a qualified service technician
perform a fireplace check -up at the beginning o f each heating season.
Do not place furniture or any other combustible household objects within 60” of the fireplace front , per fire
safety code .
This vented g as fireplace heater is not for use with air filters.
Foyer au gaz à évacuation. - Ne pas utilise r avec du combustible solide.
Keep burner and control compartment clean. See installation and operating instructions accompanying
fireplace.
S'assurer que le b rûleur et le compartiment des commandes sont propres. Voir les instructions d'installation
et d'u tilisation qui accompagnent l'appareil.
WARNING : Improper installation, adjustment, alteration, service or maintenance can cause injury or
property damage. Ref er to the owner’s information manual provided with this fireplace. For assistance or
additional i nformation consult a qualified installer, service agency or the gas supplier.
L'AVERTISSEMENT: L'installation inconvenante, ajustement, modification, service o u entretien peut causer
le dommages de propriété ou blessure. Référer au manuel d'information de propriétaire fourni cet appareil.
Pour l'assistance ou information supplémentaire consulte un qualifiée installeur, agence de service ou le
fournisseur de gaz.
Do not use this fireplace if any part has been under water. Immediately call a qualified service technician to
inspect the fireplace and to replace any part of the control system and any gas control, which has been
underwater.
Ne pas utiliser cet appareil s’il a été plongé, même partiellement, dans l’eau. Appeler un technicien qualifié
pour inspecter l’appareil et remplacer toute partie du système de commande et toute commande qui a été
plongée dans l’eau.
Do not use any fronts or doors with this fireplace unless they are certified by Mendota and installed by a
certified installer.
Seules des portes certifiées pour cet appareil doivent être utilisées.
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2.3 REQUIREMENTS FOR THE COMMONWEALTH OF MASS.
The information in this section applies to all installations p erformed in the Common Wealth of Massachusetts only.
a. For all side wall, horizontally vented gas fueled equipment installed in every dwelling, building or structure used in whole
or in part for residential purposes and where the side wall exhaust vent termi nation is less than seven (7) feet above
grade, the following requirements shall be satisfied:
1. If there is no carbon monoxide detector with an alarm already installed in compliance with the most current
edition of NFPA 720, NFPA 70 and the Massachusetts State Building code in the residential unit served by the
side wall horizontally vented gas fueled equipment, a battery-operated carbon monoxide detector with an
alarm shall be installed in compliance with the most current edition of NFPA 720. NFPA 70 and th e
Massachusetts State Building Code.
2. In addition to the above requirements, if there is not one a lready present, a carbon monoxide detector with an
alarm and a battery backup shall be installed and located in accordance with the installation requirements
supplied with the detector on the floor level where the gas equipment is installed. The carbon mon oxide
detector with an alarm shall comply with 527 CMR, ANSI/UL 2034 Standards or CSA 6.19 and the most current
edition of NFPA 720. In the event that the requirements of this subdivision cannot be met at the time of the
completion of the installation of the equipment, the installer shall have a period of thirty (30) days to comply
with this requirement; provided, however, that during said thirty (30) day period , a battery-operated carbon
monoxide detector with an alarm shall be installed in compliance with the most current edition of NFPA 720,
NFPA 70 and the Massachusetts State Building Code. In the event that the horizontally vented gas fueled
equipment is installed in a crawl space or an attic, the carbon monoxide detector may be installed on the next
adjacent habitable floor level. Such detector may be a battery-operated carbon monoxide detector with an
alarm and shall be installed in compliance with the most current edition of NFPA 720, NFPA 70 and the
Massachusetts State Building Code.
3. A metal or plastic identification plate shall be permanently mounted to the exterior of the building at a
minimum height of eight (8) feet above grade directly in line with the exhaust vent terminal for the horizontally
vented gas fueled heating appliance or equipment. Th e sign shall read, in print size no less than one-half (1/2)”
in size, “GAS VENT DIRECTLY BELOW, KEEP CLEAR OF ALL OBSTRUCTIONS”
4. A final inspection by the state or local gas inspector of the side wall horizontally vented equipment shall not be
performed until proof is provided that the state or local electrical inspector having jurisdiction has granted a
permit for installation of carbon monoxide detectors and a larms as required above.
b. EXEMPTIONS: The following equipment is exempt from 248 CMR 5.08(2) (a) 1 through 4:
1. The equipment listed in Chapter 10 entitled “Equipment Not Required To Be Vented” in the most current
edition of NFPA 54 as adopted by the Board; and
2. Product Approved side wall horizontally vented gas fueled equipment installed in a room or str ucture separate
from the dwelling, building or structure used in whole or in part for residential purposes.
c. When the manufacturer of Product Approved side wall horizontally vented gas equipment provides a venting system
design or venting system components with the equipment, the instructions for installation of the equipment and the
venting system shall include:
1. A complete parts list for the venting system design or venting system; and
2. Detailed instructions for the installation of the venting system design or the venting system components.
d. When the manufacturer of a Product Approved side wall horizontally vented gas fueled equipment does not provide the
parts for venting the flue gases, but identifies “special venting systems”, the following shall be satisfi ed:
1. The referenced “special venting system” instructions shall be included with the appliance or equipment
installation instructions; and
2. The “special venting systems” shall be Product Approved by the Board, and the instructions for that system shall
include a parts list and detailed installation instructions.
e. A copy of all installation instructions for all Product Approved side wall horizontally vented gas fueled equipment, all
venting instructions, all parts lists for venting instructions, and/or all venting design instructions shall remain with the
appliance or equipment at the completion of the installation
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TECHNICAL REFERENCES
Read and understand all information provided under this section, Technical References, before you begin the installation of this
product. Failure to follow all technical reference information, use of components or parts not approved or use of improper
installation procedures can lead to a fire or explosion causing property damage, personal injury or loss of life.
3.1 GENERAL TECHNICAL REFERENCES
Caution : Before igniting the pilot or burners, perform the following inspections and verifications:
Check glass gasket seal. Visually inspect glass gasket, especially at the corners of the glass piece. Glass gasket is installed as a 4-
piece assembly. Check joints between the gasket pi eces at the corners. They should butt against each other to create a seal.
Gaps between gasket pieces can cause exhaust leaks and lead to acrid smell concerns. Check for gas leaks at all fittings.
During the first burning cycle of this Fireplace, ensure the convection blower is running at level three during the first two hours
of initial burn. After two hours of initial burn, allow fireplace to cool. Proceed with Mendota Fireplace Curing Instructions,
Chapter 3.1.1.
This fireplace must be installed and serviced by a qualified installer, service agency, or the gas supplier. Any adjustments to
burner, pilot, logs or coal bed must be made by a qualified installer, service agency, or the gas supplier.
Always use Mendota decorative fronts and Mendota approved vent systems and vent caps only.
WARNING
FIRE RISK/ODOR RISK
• This fireplace must be installed on top of wood, masonry or metal floor extending the full width and depth of this
fireplace.
• An R-1 Rated Hearth Protection Pad, 18” deep, is required unless this fireplace is elevated at least 6” above floor
level of the room. For every 1” this fireplace is elevated, you may reduce the hearth pad depth by 2”. Locate and
install appliance to all clearance specifications in manual.
• Verify glass gasket seal before firing unit the first time. Verify proper latching of glass frame onto unit body.
• Understand that this appliance requires a break-in period during which small amounts of smoke and curing smells
will be emitted.
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Mendota Fireplace Curing Instructions
ATTENTION
It is importan t that the blowers are turned on during this step to prevent the curing smoke from staining the
wall finish above the fireplace. Mendota recommends completing Step 1 prior to install ation of wall finish
materials.
Visible smoke and strong odor are to be e xpected during this step. If desired, disable smoke alarms before
this step, smoke from the initial curing c ycle will set off smoke alarms. Open doors and windows of the home
to circulate fresh air.
Step 1: Expelling Initial Smoke and Odors
• Please refer to 5.4 OPERATING INFORMATION if you have questions on how to operate your Mendota.
• Complete the installation of any barrier screen (required) or front.
• Turn the fireplace on in the Manual (Off) thermostat mode.
• Set the Flame Height to Hi.
• Set the Fan Speed Control to Level 3.
• Run the fireplace with these settings for a minimum of 2 hours.
• Turn the fireplace off and let it cool.
Step 2: High Heat Curing Cycle
• Turn the fireplace on in the Manual (Off) thermostat mode.
• Set the Flame Height to Hi.
• Set the Fan Speed Control to Off.
• Run the fireplace with these settings until curing odors have diminished.
• When odors have diminished leave the fireplace turned on and continue to Step 3.
Step 3: Final Curing Cycle
• With the fireplace still turned on from Step 2.
• Set the Fan Speed Control to the lowest setting Level 1.
• If any new curing odors are detected, continue to run the fireplace with this setting until the curing odors have
diminished.
ATTENTION: Slight odors may still be noticeable on future startups of the fireplace. These will diminish over time as the
fireplace is used.
Additional Curing Information
It is not unusual for a fireplace to require more than 10 continuous hours on high for curing odors to diminish. There are
variables that can extend or shorten the curing time such as decorative fronts, doors, facing materials and their application.
Finish materials around the fireplace are subject to high temperatures. Finishing materials used over the fireplace in the non -
combustible zone can see temperatures around 350° F. Materials used around the fireplace must be rated for these
temperatures. Failure to use adequate materials can result in odor problems. Please refer to Suitable Mantel and Facing
Materials, Chapter 3.2.12 of this manual for information on appropriate finishing materials.
Please be aware that materials used around the fireplace will heat up and have the potential to cause odor issues. Adhesives,
glue, wall substrate, wall finish material, paints and polishes are common materials that if used incorrectly will cau se odor
issues. Mendota is not responsible for any odor issues caused by materials used around the fireplace.
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3.2 MECHANICAL TECHNICAL REFERENCES
WARNING: VENT IS NOT CENTERED ON THE UNIT!
Planning the installation
This Mendota Fireplace must be installed and serviced by a qualified installer, service agency, or the gas supplier.
When planning on appliance installation, it is necessary to determine the following information before installing:
• Where the appliance is to be installed.
• The vent system configuration to be used.
• Gas supply piping.
• Electrical Wiring.
• Framing and finishing details.
• Hearth Protection Pad Requirements.
• Whether accessories such as a ceiling fan are desired.
Selecting Appliance Location
When selecting a location for your appliance, it is important to consider the required clearances to walls.
Figure 3-1 FIREPLACE LOCATION
WARNING
FIRE RISK- ODOR RISK
• Install appliance on hard metal or wood surfaces extending full width and depth of this fireplace.
• Do NOT install this fireplace directly on carpeting, vinyl or any combustible material other than wood.
Construct chase to all clearance specifications in manual.
• Locate and install appliance to all clearance specifications in manual.
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Listing Label
The listing label is located under the firebox. Remove the center access grill and locate the listing plate. It is chained to the
firebox’s leg.
Figure 3-2 Listing Label
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Other Warning and Caution Labels
A few warnings or caution labels are attached to this appliance body as required per code to inform you of important facts. You
can find these labels on the right-side outer surface of this appliance.
Make certain you heed all the warning and caution statements during installation and maintenance of this appliance.
Figure 3-3 Figure 3-4
Figure 3-5 Figure 3-6
Figure 3-7 Figure 3-8
Figure 3-9
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Figure 3-11
Figure 3-10
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ML39 Fireplace Ratings Information
This Mendota Fireplace can be installed directly on top of a metal, masonry or wood structural surface.
ELECTRICAL REQUIREMENTS: 120 Volts AC, 1.5 Amps (minimum line voltage allowed 110 Volts AC) REQUIRED
GAS SUPPLY PRESSURE: NAT. GAS: 7" W.C. [5.0" W.C. MIN., 11" W.C. MAX.]
L.P. GAS: 11" W.C. [11" W.C. MIN., 13" W.C. MAX.]
LP GAS CONVERSION KIT: This Fireplace comes configured for use with Natural Gas. To convert the Fireplace for use with LP
Gas, install: LP GAS CONVERSION KIT #HA-96-00023.
GAS INPUT RATES High Fire Low Fire
BTUH .......................... NAT. GAS 34,250 23,000
BTUH .......................... L.P. GAS 34,250 28,000
ORIFICE SIZES………… [0-2000ft (610 m)]: #33 NG [#50 L.P.]
[2000-4500ft (610-1370 m)]: #34 NG [#51 L.P.]
P.4 FIREPLACE EFFICIENCY .......... 77.3%
FLUE VENTING ............COAXIAL RIGID- 5” DIAMETER EXHAUST & 8” DIAMETER AIR INLET AND APPROVED VENT CAPS
All UL Listed Coaxial Rigid 5”X8” Vent pipe components and vent caps are approved for use. Do not mix components of
different brands or series. Always use the same brand and series components throughout the entire vent system.
MINIMUM CLEARANCES TO COMBUSTIBLE CONSTRUCTION
UNIT TO FLOOR 0in. (0mm) INNER GUIDE EDGE TO ADJACENT SIDEWALL 16in. (406 mm)
UNIT TO ENCLOSURE SIDEWALL 1/2in. (13mm) VENT PIPE TOP TO COMBUSTIBLES 3in. (76mm)
UNIT TO ENCLOSURE BACK WALL 1/2in. (13mm) VENT PIPE SIDES TO COMBUSTIBLES 1in. (25mm)
UNIT BOTTOM TO ENCLOSURE CEILING 66 3/8 in. (142 cm) VENT PIPE BOTTOM TO COMBUSTIBLES 1in. (25mm)
UNIT BOTTOM TO ROOM CEILING 72 in. (1829 mm)
DISTANCE TO 8” MANTLE ABOVE TOP CONVECTION AIR DISCHARGE OPENING 20 in. (508 mm)
MINIMUM COMBUSTIBLE ROUGH FRAMING DIMENSIONS
WIDTH = 48” (122cm) HEIGHT = 46” (117cm) DEPTH = 22” (56cm)
NET WEIGHT................300 lbs. (Team Lift recommended)
BARRIER SCREEN: A barrier screen that has been certified for use with this Fireplace must be installed on the Fireplace when it
is in use. The barrier screen will prevent accidental contact with the glass door face, which could result in a severe burn.
SAFETY: AGA certified, electronic ignition IPI system activated with thermostatic remote control.
CERTIFIED TO: ANSI Z21.88
This Mendota Gas Fireplace has been tested and certified by:
Intertek Testing Services, 8431 Murphy Drive, Middleton, WI 53562
ICBO#AA647-4
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Normal Surface Temperatures
WARNING: The supplied barrier screen must be installed , always , when this fireplace is in operation. Do
not place any object directly in front (within 60” from barrier screen s urface ) or directly above (on the
front edge o f the mantel). This is a heat ing appliance. Areas directly in front and above this appliance will
be very hot and can damage most house hold objects if placed too close. Keep Furniture pieces at least
60” away in front of the barrier screen surface .
HINT: To greatly reduce surface temperatures surrounding this Fireplace during operation, Mendota
recommends operating the integrated convect ion air blowers which aid in cooling all surrounding surfaces.
Mendota Fireplaces comply with ANSI Z21.88-2016 Standards for maximum surface temperatures on exposed “combustible”
surfaces adjacent to the Fireplace.
Be aware that surfaces in front of, above and adjacent to this heater appliance can be too hot to touch. As long as all required
clearances to combustibles are met and the required finishing materials are used, this appliance will perform safely. Note th at
the exposed surfaces immediately surrounding the Fireplace can have surface temperatures that are too hot to touch. This level
of surface temperature is considered normal and does not indicate any hazardous situation.
Surround Face Temperatures
Areas of the breastplate directly above the top
convection air gap of this Fireplace can be very hot (too
hot to touch) and is deemed normal.
Mantel Temperatures
Mendota Fireplaces comply with ANSI Z21.88-2016
standards for maximum surface temperatures on
exposed “combustible” surfaces adjacent to the
Fireplace. Be aware that surface in front of, above and
adjacent to this heater appliance can be too hot to
touch. As long as all required clearances to
combustibles are met and the required finishing
materials are used, this appliance will perform safely.
Note that the exposed surfaces immediately
surrounding the Fireplace can have a surface
temperature too hot to touch. This level of surface
temperatures is considered normal and does not
indicate any hazardous situation.
WARNING: Surfaces surrounding this Fireplace can be very hot to the touch during operation. Carefully supervise children and
pets while this Fireplace is operating.
Figure 3-12 Hot Zones
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Fireplace Dimensions and Clearances
WARNING: VENT IS NOT CENTERED ON THE UNIT!
Figure 3-13 Overall Fireplace Dimensions
Caution: The distance from floor level to the centerline of the vent cap is based on Simpson DuraVent GS
components. If using vent components of another brand, do not assume that the measurement given here is
applicable. Verify the distance to the centerline of vent cap by measuring the components you are using.
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Fireplace Features Identification
See
Figure 3-14 FIREPLACE DIMENSIONS AND FEATURES below. Identify the features included with this Fireplace and their locations.
WARNING: VENT IS NOT CENTERED ON THE UNIT!
Figure 3-14 FIREPLACE DIMENSIONS AND FEATURES
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Convection Blower System
Dual blowers are provided as standard equipment with this ML39 Fireplace. The dual blowers have an air output rating of 190
CFM (in free air). This Fireplace is designed to operate with the blowers turned off or on. Turning the blower on aids in
distributing and circulating heat to the room this Fireplace is installed in.
Lifting Handles
Four lifting handles, one on each side and two on the rear wall, are provided. The lifting handles make it easy for two
individuals to lift and transport this Fireplace.
Note: Team l ift ing is recom mended.
To use the lifting handles, slide hands into the opening of the lifting handle, grip top U -shaped section tightly and lift.
Once this Fireplace is moved to its final location, you may remove and discard the lifting handles, if necessary, to reduce the
width of this Fireplace.
Figure 3-15 Lifting Handles
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Rough Framing Dimensions
The rough framing dimensions given are the
minimum allowed framing dimensions. Be sure
when planning the framing of the unit that
adequate space to hook up the gas and electrical
on the left side of the unit.
SPECIAL FRAMING NOTE:
If the fireplace is to be recessed in a cavity deeper than 22”, all framing and finishing materials protruding past the front face of
this fireplace must be of the NON-COMBUSTIBLE variety.
WARNING: VENT IS NOT CENTERED ON THE UNIT
Minimum Required Dimensions
DESCRIPTION DIMENSION
(INCHES)
A ENCLOSURE FRAMING WIDTH 48
B ENCLOSURE FRAMING DEPTH 22
C ENCLOSURE FRAMING HEIGHT 46
D ENCLOSURE CELING HEIGHT 66 3/8
E FINISH MATERIAL THICKNESS 1
F UNIT BASE TO ROOM CEILING 72
G UNIT BASE TO SIDE WALL 16
H UNIT BASE TO 8” MANTEL 51
Figure 3-16 FRAMING DIMENSIONS
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Constructing the Appliance Chase
A chase is a vertical box-like structure built to enclose this fireplace and its vent system. Vertical vents that run on the outside
of a building may be, but are not required to be, installed inside a chase.
Construction of the chase may vary with the type of building. These instructions are not substitutes for the require ments of
local building codes. Local building codes MUST be adhered to.
Chases should be constructed in the manner of all outside walls of the home to prevent cold air drafting problems. The chase
should not break the outside building envelope in any manner.
Wall, ceiling, base plate and cantilever floor of the chase should be insulated. Vapor and air infiltration barriers should be
installed in the chase as per regional codes for the rest of the home. Additionally, in regions where cold air infiltration may be
an issue, the inside surfaces of the chase may be sheet rocked and taped for maximum air tightness.
To further prevent drafts, the fire stops should be caulked with high temperature caulk to seal the gaps. Gas line holes and
other openings should be caulked with high temp caulk or stuffed with unfaced insulation. If the appliance is being installed on
a cement slab, a layer of plywood may be placed underneath this fireplace to prevent conducting cold up into the room
WARNING: VENT IS NOT CENTERED ON THE UNIT!
Figure 3-17 Floor to Wall Thimble Center Dimension
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Clearance from Appliance Side Walls
Clearances to Combustible Side Walls
The minimum distance required from the inner guide side edge to a combustible side wall is 16”. Combustible side walls,
mantel corbels, mantel legs and other combustible walls and decorative objects must fall behind a 45-degree line extending
outward from the inner guide side edge unless such objects are more than 16” away from the inner guide side edge.
WARNING: VENT IS NOT CENTERED ON THE UNIT!
If the required clearance cannot be m et to a pre -existing combustible side wall, an NFPA approved clearance
reduction shield , metal or ceramic board, must be added to the s ide wall.
Figure 3-18 CLEARANCE TO BODY
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Horizontal Clearance Reduction by 66%
NPFA 211 Approved: Install 20-gauge or heavier steel shield that provides at least a 1” active airspace, on the combustible wall
surface. To provide for active airflow, install at least 1” metal or ceramic standoffs or spacers between the metal shield and the
combustible surface being protected. The bottom and top edges of the cavity between the metal shield and the combustible
surface must be left open. The steel shield must be a minimum of 12” larger in each direction than the surface area of the
source of heat; or if the surface being protected is smaller than surface area of the source of heat, this shield must be larger
than the combustible surface in each direction.
By using this method of protection, if the required horizontal clearance was 16”, the resulting clearance will be reduced by 66%
to 5-3/8” between the heat source and the metal shield.
Horizontal Clearance Reduction by 50%
NPFA 211 Approved: Install an R-1 rated ceramic board or R-1 rated mineral board on the wall you are attempting to protect.
by using this method of protection, if the required horizontal clearance was 16”, the resulting clearance will be reduced by 50%
to 8” between the heat source and the R-1 Rated wall board.
Clearances to Combustible Mantels
An 8” combustible mantel may be installed at a minimum of 51" above the floor level of this Fireplace. Non-combustible
(marble, brick, stone, metal etc.) mantels can be installed at any desired height above the top convection air openi ng. Any pre-
existing combustible mantel must fall within the approved mantel profile chart.
WARNING: Make proper use of this chart. Do not compromise the specifications contained in this chart.
Failure to adhere to proper clearances required to combustibles may cause spontaneous combustion of the mantel and may
result in a fire causing property damage, personal injury or loss of life.
NOTE: For mantels that protrude more than 8 inches from the front surface of the fireplace use a rise and run of (1:1) to
calculate the required height to the mantel.
EXAMPLE: You have a 12" mantel. To calculate the height above the convection air opening the equation
would be: (Depth of Mantel) – 8” + 51” = (Height above the floor of the fireplace)
12” – 8” + 51” = 55”
DO NOT deviate from this minimum clearance requirement. Doing so can lead to a severe fire hazard.
Figure 3-19 Mantel Clearances
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Suitable Mantel and Facing Materials
Use of ceramic glazed tiles as facing materials around a Mendota Fireplace is approved. Use caution when selecting tile
adhesives. Avoid premixed tile adhesives which contain products that can off gas for long periods when exposed to heat. Use
Portland cement based unmixed tile adhesives or RTV Silicone to attach ceramic glazed tiles as facing in hot areas around this
Fireplace. If using RTV silicone, allow a minimum 48 hours cure time for the silicone to cure before firing this Fireplace after tile
application.
Marble, Granite and Natural Stones
Marble, granite and other natural stone products are approved for use as mantel and facing materials with the following
limitations and understanding of these cautionary statements:
Never use a one -piece marble, granite or natural stone that is water jet or mechanically cut in a U -shape
as facing material to cover the sides and top areas around this product. Doing so can lead to crack
formation at the inner corners of the U shape due to thermal expansion.
Figure 3-21 Three Piece Stone
Figure 3-20 Allowable Mantel Profile Chart
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Most marble slabs and marble tiles contain a polyester resin coating while most granite slabs and granite tiles contain epoxy
resin coatings. The polyester resin coatings and the epoxy resin coatings provide structural strength to the stone slab s and
prevent cracking, chipping and breakage during shipping and handling. These coatings also provide a glossy or satin surface
finish and help seal the stone surface.
The polyester resin used on marble slabs can discolor when exposed to temperatures gre ater than 150 o F
and will structurally fail at temperatures above 230 o F. The epoxy resin coating used on granite slabs are
resistant to discoloring and structural failures up to 3 50o F.Mendota does not assu me any liability for
discoloring, flaking or crackin g of marble or granite.
Temperatures on facings around Mendota Gas Fireplaces can reach 350oF
directly outside the top convection air gap and as high as 210oF at the
maximum allowed mantel protrusion level above the top convection air gap.
These temperatures can discolor polyester resin coated marble facings and
can cause the polyester resin coating to fail near the top convection air gap.
Mendota Fireplace c annot guarantee suitability of use of any
marble slabs or tiles that have a polyester resin coating applied
to it and cannot g uarantee against discoloration or structural
failure of marble or polished stone facings that have a polyester
resin coating. Cons ult with your local stone supplier.
Prior to use of any marble, granite or polished stone facing material, especially white colored ones, run heat exposure tests on a
sample piece. Expose sample pieces to temperatures between 275 oF and 350oF for a period of eight hours. Compare the heat
exposed sample to a control unheated piece and judge for color changes. Do not use if any c olor changes are evident.
Mendota recommends the use of honed bare marble and bare stone facing materials or honed ba re granite
and epoxy resin coated granite only.
Mendota cautions that due to natural structural defects that can exist within marble and stone pieces, cracking and/or flaking
of the marble or stone is possible and must be considered prior to selection and application around Mendota Fireplaces.
Mendota further cautions that proper adhesives be used to attach stone facings. Pay attention to the potential of off-gassing of
chemical vapors from mastic and other adhesives. Improper selection can lead to emission of chemicals with unwanted smells.
Suitable Backer Materials R-Ratings
R-Values of Common Backer Materials
Material Thickness R-Value
Mineral Fiber Board (Backer 160) 1/2" 1.270
Mineral Fiber Board (Backer 300) 1/2" 1.030
Ceramic Board (Rescor 360) 1/2" 1.110
Ceramic Board (Fiberfrax Duraboard LD) 1/2" 1.100
Common Brick 2-1/4" 0.450
Common Brick 4" 0.800
Gypsum or Plaster Board 1/2" 0.450
Cement Board (Durock Next Gen) 1/2" 0.390
Cement Board (Wonderboard) 1/2" 0.260
Cement Board (Hardibacker 500) 1/2" 0.200
Cement Board (Hardibacker) 1/4" 0.130
Figure 3-22 Top Air Gap
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Suitable Finishing Materials R-Ratings
R-Values of Common Facing Materials
Material Thickness R-Value
Cement Mortar 1/2" 0.100
Concrete 1" 0.095
Ceramic Tile 1/4" 0.020
Flagstone 1" 0.079
Granite 1" 0.083
Limestone 1" 0.153
Marble 1" 0.090
Sandstone 1" 0.079
Slate 1" 0.100
Suitable Paints and Sealant Materials
3.2.12.4.1 Paint Types Approved for Use
Industrial Acrylic Paints, Alkyd based Paints. When selecting paint for applications on facings, mantels, corbels or floors within
2’ in front of a fireplace raised 6” or higher, avoid off the shelf paints which may have modifier additives us ed to increase
“hiding” ability, accelerate drying times and curing tim es. Consult with a reputable paints and sealants supplier and acquire
industrial acrylic paints or alkyd-based paints.
3.2.12.4.2 Sealants Type Approved for Use
Heat resistant polyurethane sealants which are not damaged by prolonged exposure to raised temperatures. Many are flame
resistant, meaning that they resist ignition when exposed to high temperatures and can insulate the substrate and delay
damage to it. When selecting polyurethane for applications on facings, mantels, corbels or floors within 3’ in front of or above a
fireplace, avoid off the shelf urethane sealants which may have modifier additives used to accelerate drying times and curing
times. Consult with a reputable paints and sealants supplier and acquire heat resistant polyurethane sealants.
3.2.12.4.3 Wood Application Cautions
If wood used around or in front of the fireplace has been chemically cleaned or bleached prior to staining or painting, it is of the
utmost importance to make certain that the cleaner or bleach does not remain in the wood substrate under the final paint or
sealant applied. If any cleaner or bleach remain within the wood structure, application of heat from the fireplace, even low -level
heat, will cause the cleaner or bleach compounds to expand or evaporate causing separation of the paint or sealant from the
wood surface and may cause peeling or bubbling of the paint or sealant.
Moisture content of the wood substrate is also of critical importance. High moisture content wood when heated will yield
evaporation of the moisture and hydraulic pressure under the paint or sealants which can lead to peeling or bubbling. Always
select the lowest moisture content wood substrate.
Refer to Mendota Fireplace Curing Instructions, Chapter 3.1.1.
FRAMING DEPTH and FINISHING GUIDES
This fireplace comes with one standard finishing guide that will be used with any inside finish decorative front. Grace fronts
have optional finishing applications depending on what wall finishing material and what finished look you want to achieve. Refer
to the Grace finishing guide options.
It is important to know what wall finish is being used and what finish option is preferred prior to unit installation when choosing a
Grace front.
When the wall finish material will exceed 2 ½” in depth, the Grace (Option 3) guide kit will be required to allow the decorative
front to install properly.
All finish guides, standard or optional, protrude 1” from the face of the unit. Factory guides are installed with rivets and can be
removed with a ⅛” drill bit.
The finish guide used should be permanently left in place.
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GRACE FRONT GUIDE OPTIONS
This fireplace comes with guides to ensure finish materials do not encroach into the convection air area of the fireplace. Some
decorative Front models for this fireplace come with additional guides for different finishing and appearance options.
There are three options for finishing the fireplace when installing a Grace front.
Please read the following instruction before installing the finishing material on t he front of this fireplace. If you have any
questions about finishing the fireplace, contact a Mendota dealer or the Mendota Service Department.
• To prevent damage, remove any decorative front, screen, or door from the fireplace and mask the fireplace glass frame
prior to installation of finish materials
Option 1: Installing Front On Top Of Finishing Material
Note: No extra parts required. Option 1 employs the inner guides that are factory installed.
Option 1 requires that your finish material be less than 2.5” thick, including backing materials and reasonably flat. If your finish
material thickness exceeds 2.5” then consider using Option 3 Guides, see “Option 3.
Otherwise, use the inner guides that come installed on the fireplace. The guides are 1” deep.
If your finish material is rough or lightly colored and extends past 1”, you may be able to see the material behind the screen at
certain angles.
After the fireplace is installed
and the finishing material
installation is complete the
decorative front can be hung
on the fireplace. The finished
look is similar to hanging a
picture frame on a wall where
the frame protrudes out from
the wall.
Because the screen is attached
to the back of the Grace front,
there will be a ¾” gap between
the frame and wall. If you do
not want this gap but want the
frame to mount over the
finishing material, then
consider using Option 2.
Figure 3-24 OPTION 1, ISO VIEW
Figure 3-23 OPTION 1, EDGE VIEW
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Option 2: Installing The Front On Top Of Finishing Materials With The Screen Recessed
Note: Order “template kit” or Option 2 in the pricing sheet.
Option 2 requires that your
finish material be less than 2.5”
thick including backing materials
and reasonably flat. If they are
not, use Option 3.
Use the reference chart or
pricing to ensure you have the
necessary guides/templates.
Option 3: Installing Front Flush Or Recessed Into Wall
Note: You must order guide kit
Option 3.
This option allows the front to
mount with any finish material. It is
a “recessed” or “flush” finish.
Use the reference chart or pricing
sheets to see which guide kit is
required for each decorative front
type.
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Installing A Flat Panel TV Above This Fireplace
Note: The model depicted in the images in this document may not match the particular model you have selected. However, these
instructions do apply commonly to all Mendota ZC Fireplaces.
All flat panel TVs are solid state electronic appliances and are vulnerable to high ambient temperatures.
This fireplace is a gas fired heater and high ambient temperatures are to be expected in the immediate vicinity of this fi replace. If
the installation of a Flat Panel TV is desired above this appliance, proceed with caution. Follow the specific instructions p rovided
in this section.
Failure to follow instructions can lead to heat related damage to TVs installed above this fir eplace.
There are three options available for adding a flat panel TV above this Fireplace: Add a mantel below the TV, create a framed
recess cavity for housing the TV or install a Cool Wall System.
Option 1: Add a mantel
Add a mantel that is 2” deeper{minimum} than the full depth of the TV and as wide as the full width of the TV {minimum} above
this Fireplace. The mantel shall be mounted so that its top surface is 18” (minimum) up from the top edge of the top air gap of
this Fireplace.
Option 1- Side View
If the mantel is constructed of combustible materials, make certain that the entire mantel meets the Clearances to Combustible
Mantels requirements.
Option 1-Front View
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Option 2: Create a recessed cavity
Frame a recessed cavity above this fireplace. The cavity shall be 6” taller and 6” wider than the TV being installed and the
cavity’s bottom surface must be a minimum of 24” above the top edge of the top air gap of this Fireplace.
OPTION 2- SIDE VIEW
Option 3: Install a Cool Wall Kit
Note: Cool Wall System is not available on M27 model fireplaces.
Install an optional Cool Wall Kit on the Fireplace.
The Cool Wall System reduces the temperatures on the wall above the fireplace significantly.
This allows a Flat Panel TV to be mounted above this fireplace without a recessed cavity or a
mantel. However, the installed TV’s bottom edge must be 24” (minimum) above the top edge
of the top air gap of this fireplace.
Three Cool Wall Kit options are available. Depending on the room ceiling height and TV si ze,
select a suitable Cool Wall Kit.
OPTION 3- SIDE VIEW
OPTION 2- ISO VIEW
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Venting
The ML39 Firep lace must be vented to the outside and must use one of the approved coaxial rigid ducting
system s or a coaxial flexible ducting system . Do Not Use any silicone sealants at pipe joints. Stove
gask et cements may be used at pipe joints but is not required .
The ML39 Fireplaces requires coaxial rigid- 5” diameter exhaust & 8” diameter air inlet and approved vent caps for most
installations. In some special cases, flexible ducting may be used. Contact Mendota Technical Service Department if your
installation requires other than standard rigid 5” X 8” Coaxial venting components.
All UL Listed Coaxial Rigid 5”X8” Vent pipe components and vent caps are approved for use. Do not mix components of different
brands or series. Always use the same brand and series components throughout the entire vent system.
All warranties will be voided and serious fire, health or other safety hazards may result from any of the
following actions: Installation by unauthorized p ersonnel; installation of any damaged component;
unauthoriz ed modification of vent system; installation of any components not approved by Mendota; failure
to meet all clearance requirements; failure to properly twist -lock and positively seal all components .
Consult local building codes before beginning the instal lation.
WARNING: Always maintain required clearances (air spaces) to combustibles to prevent a fire hazard. Do
not fill air spaces with insulation. Check installation instructions for minimum cle arance requirements
between the outer walls of the vent pip e and nearby combustible surfaces. Be sure to check the vent
termination clearance requirements from decks, windows, soffit, gas regulators, air supply inlets, and public
walkways, as specified in these installation instructions and local building codes.
SAFETY PRECAUTIONS FOR THE INSTALLER: 1) Wear gloves and safety glasses for protection; 2) Exercise extreme caution when
using ladders or on rooftops; and 3) be aware of electrical wiring locations in walls and ceilings.
This gas appliance and vent system must be vented directly to the outside of the building, and never
attached to a chimney serving another solid fuel or gas burning appliance. Each direct vent gas appliance
must have its own s eparate vent system. Common vent systems are prohib ited.
To assure proper venting performance of this high -performance
Mendota Direct Vent Fireplace, it is critical that all brands of vent pipe
sections are sealed tightly and leak -proof. This means that all pipe
sections must be carefully rotated into the fully "twist -locked" position.
We strongly recommend that fixed length pipe sections be used in place of telescoping
sections whenever possible.
COMPONENT "TWIST-LOCK" CONNECTION PROCEDURE
DuraVent and American Metals pipe and fittings are designed with special twist-lock
connections. Twist-lock procedure is as
follows: four (4) indentations, located on the female ends of pipes and fittings are
designed to slide straight in to the male ends of the adjacent pipes and fittings, by
orienting the four pipe indentations so that they match and slide into the four entry
slots on the male ends.
Push the pipe sections completely together then twist -lock one section
clockwise, approximately ¼ turn until the two sections are fully locked. The
female locking lugs will not be visible from the outside on the black pipe or
fittings. They may be located by examining inside of the female ends.
Wall Heat Shield for Horizontal Vent Caps
Always use heat shield (#AA-11-00458) when the exterior wall covering is
made of vinyl, wood or other combustible materials. Heat shield (#AA-11-
00458) or an equivalent heat shield shall be installed. Heat shield (#AA-11-
00458) is available for order directly from Mendota fireplaces.
HEAT SHIELD #AA-11-00458
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Flue Venting Components Identification Diagrams
Prior to installing at altitudes higher than 7500, please contact the Mendota technical service department for specific
venting requirements and venting restrictions.
ITEM DESCRIPTION
1 6" or 7” PIPE (DuraVent 6”/Amerivent 7”), 9”, 12”
2 12" VENT STACK
3 24" VENT STACK
4 36" VENT STACK
5 48" VENT STACK
6 90ºGALVANIZED ELBOW
6a 45º GALVANIZED ELBOW
7 ADJUSTABLE WALL THIMBLE
8 ATTIC INSULATION SHIELD 12"
9 ROOF FLASHING (0/12 TO 6/12)
10 ROOF FLASHING (7/12 TO 12/12)
11 STORM COLLAR
12 VERTICAL VENT CAP
13 SUPPORT BAND
14 HORIZONTAL VENT CAP
15 FIRE STOP SPACER
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Approved Vent Systems
H
APPROVED
NOT ALLOWED
NOT ALLOWED
V1
V2
H
H
V1
APPROVED
40 FEET
MAXIMUM
APPROVEDAPPROVED
APPROVED APPROVEDNOT ALLOWED
APPROVED
H2
V
H2
H2
V2
V1
V2
V
V
H1
H1
H1
H
STRAIGHT UP,
VERTICAL VENTING
THREE HORIZONTAL DISCHARGE
90° ELBOWS
VERTICAL RISE
TRIPLE 90° ELBOWS
VERTICAL TERMINATION
VERTICAL RISE
TRIPLE 90° ELBOWS
HORIZONTAL TERMINATION
VERTICAL RISE
DUAL 90° ELBOWS
HORIZONTAL TERMINATION
VERTICAL RISE
DUAL 90° ELBOWS
VERTICAL TERMINATION
ZERO VERTICAL
DUAL 90° ELBOWS
VERTICAL TERMINATION
VERTICAL RISE
HORIZONTAL TERMINATION
ZERO VERTICAL
HORIZONTAL TERMINATION
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Exterior Vent Locations and Restrictions
Note: All measurements are to be taken from the center of the vent cap.
- Vent Terminal X - Air Supply Inlet - Area where terminal is not permitted
A
=
Clearance above grade, veranda, porch, deck, or
balcony (*18 inches (45 cm) minimum)
H
=
*Not to be installed above a meter/regulator assembly
within 3 feet (90 cm) horizontally from the center-line
of the regulator; within a height of 15 feet
B
=
Clearance to window or door that may be opened
(*18 inches (45 cm) minimum. I = *Clearance to service regulator vent outlet *3 feet (92
cm) minimum.
C
=
*Clearance to permanently closed window
(minimum 18 inches (45 cm) recommended to
prevent condensation on window)
J = *Clearance to non-mechanical air supply inlet to
building or the combustion air inlet to any other
appliance.
12 inches (30 cm) minimum.
D
=
*Vertical clearance to ventilated soffit located
above the terminal from the center-line of the
terminal 18” (45 cm) min. Minimum 24” (60 cm to
Vinyl Soffit)
K
=
*Clearance to a mechanical air supply inlet
In USA, 3 feet minimum above, if within 10 feet
horizontally. In Canada, 6 feet minimum
E
=
*Clearance to unventilated soffit 18” min (45 cm)
min. Minimum 24” (60 cm to Vinyl Soffit)
L
=
† Clearance above paved side-walk or a paved
driveway located on public property (*7 feet (2.1 m)
minimum)
F = Clearance to outside corner - 12 inches (30 cm). M
=
Clearance under veranda, porch, deck, or balcony (*18
inches (45 cm) minimum ‡)
G
=
Clearance to inside corner - 12 inches (30 cm).
Vinyl surfaces require 24” min (60 cm). N= Minimum 24” horizontal clearance to any surface,
such as an exterior surface, for vertical terminations.
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Side by Side installation of two Vent Caps
When two or more vertical vent caps are located within proximity of one another, it is requ ired that a galvanized steel 18-gauge
or heavier barrier wall be installed between the two vent caps to eliminate recirculation of exhaust gases from one cap to
another.
The galvanized steel barrier shall be 6" taller than the highest point of the vent caps and shall be 3" wider past the outer edges of
the vent caps.
If two gravity direct vent system gas appliances are terminated next to each other, the minimum required distance between the
vertical center line of the vent caps is 18” to prevent recirculation of exhaust from one vent cap outlet into the air intake of
another vent cap.
If a wood burning flue opening is adjacent to a gravity direct vent system gas appliance vent cap and the distance between
vertical center lines of the two terminations is less than 36”, we recommend a metal divider plate be installed to prevent wood
burning exhaust from entering the gas appliance air intake path. Alternatively, you may also vertically extend the wood burning
flue liner up 24” higher than the top surface of the gas appliance vent cap.
Figure 3-25 Side by Side Vent Caps
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Decorative Cover for Vent Cap
It is acceptable to install a decorative stone, metal or terra cotta cover to disguise the vent terminal/cap used on Mendo ta
Fireplaces if the decorative cover meets the following minimum requirements:
1. The decorative cover shall be manufactured from noncombustible materials.
2. The decorative cover shall provide a minimum of 3” clearance from the outer surface of the vent cap to the inner walls
of the decorative cover on sides all of the vent cap.
3. Fresh air openings shall be provided at a level equal to or below the fresh air openings in the vent cap. The fresh air
openings shall provide a minimum open area of 60 square inches. This fresh air opening area shall be broken into at
least two equal openings (or more if po ssible). Each opening shall have a minimum height of 2” and a length that
provides the required opening to yield a total of 60 square inches, minimum.
4. The fresh air openings shall be protected in a manner that prevents the accumulation of snow which can pl ug the fresh
air openings.
Examples of Decorative Covers for Vent Caps
Figure 3-26 Decorative Covers
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3.3 ELECTRICAL TECHNICAL REFERENCES
AC Power Requirements
WARNING: Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous
operation. Verify proper operation after servicing.
For normal operation, this appliance requires 120 VAC, 2 Amp power or a 6V DC power source. The AC
power supply to this Fireplace must be hot at all times and shall not have a switch installed in it.
This appliance is equipped with an electrical junction box on the
right side. Backup DC power supply connector wire harness is
supplied with this fireplace and shall be installed adjacent to this
appliance.
Planning for AC Power Connection
On the right side of the fireplace, you will find an electrical
junction box with a two strain relief clamps. To connect AC power
to this Fireplace and the power vent, follow these steps:
1. Remove the junction box cover plate (secured with four
screws), route the 3wire end of an extension cord or house
power wire cable through the strain reliefs in the cover
plate.
2. Locate in the manual packet the plug shown in the photo. It
is labeled TO HOUSE POWER.
3. Strip the ends of the house power wires. Connect each color-coded wire to corresponding
colored wires on the plug. Use the supplied wire nuts to connect each wire pair ends.
Note: When connecting two braided wires using wire nuts, strip both braided wire ends
at least ½” and twist the two bare ends together before u sing wire nuts. When
connecting a braided wire to a solid copper wire, strip the solid copper wire end ½” and
the braided wire end ¾”. Twist the braided wire around the solid copper wire end before
applying the wire nut.
4. Plug the wire into the plug on the back of the outlet box. The house power plugs into
the plug that is towards the front of the fireplace.
5. Once the wire is plugged in, place the wire into the junction box and reinstall the cover plate.
Figure 3-27 Electrical Junction Box
STEP 1
Figure 3-28 Wire Connections
STEP 2
STEP 3
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Backup DC Power Inlet Port Installation
INSTALLATION: It is important that you install the supplied harness, outlet box and cover plate on the right side of this
appliance. The DC Power Inlet harness is 6 feet long, allowing installation of the single gang box up to 5 feet to the right of this
appliance. Install the single gang box at a maximum height of 18” to the center of the box or match the mounting height of thi s
single gang box with the height of other AC outlets that are installed in the same room as this appliance. WARNING: DO NOT
STAPLE the 6’ DC Power Inlet Harness to the wall studs.
COVER PLATES: Two cover plates are supplied and are White and Beige in color. If the home décor requires a different color
other than the two supplied colors, obtain one from a local hardware store. Make certain that the cover you obtain is exactly
the same dimensions as the ones supplied with this fireplace.
DECAL INSTALLATION: A notification decal (label) is supplied with this fireplace that aids in identifying the DC Power Inlet.
Attach this label to cover plate once installation is complete and verified.
INSTRUCT HOMEOWNER: Demonstrate to the homeowner how to attach the backup DC power pack d uring power outages.
Instruct homeowner to retain the DC battery pack and the connecting harness in a safe and secure place for use during power
outages
Figure 3-29 Backup DC Power Junction Box Installation
Figure 3-30 BACKUP DC POWER
INLET
Figure 3-31 DC Backup Power Connection
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PF2 Ignition System Diagram
Note: Connect wires in junction box located on the right
side of this appliance to house power using supplied wire
nuts.
Note: On Décor models, the Split Flow circuit is
not installed nor used.
Replacement wires must have the same type and size of
insulation as the original.
This appliance must be electrically connected and grounded
in accordance with local codes or, in the absence of local
codes, with the current NFPA 70- National Electric Code or
CSA C22.1- Canadian Electrical Code.
Label all wires prior to disconnection when servicing
control. Wiring Errors can cause improper and dangerous
operation. Verify proper operation after servicing.
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3.4 PLUMBING TECHNICAL REFERENCES
Gas Supply Requirements
NOTE : if Fireplace is to be operated with LP gas, see Chapter 4.10 Natura l Gas to LPG Conversion in this
manual before proceeding .
CORRECT GAS PRESSURE AND PROPER GAS SUPPLY LINE SIZING IS IMPERATIVE TO THE SUCCESSFUL PERFORMANCE OF YOUR
MENDOTA GAS FIREPLACE. BE SURE THE GAS SUPPLIER OR PLUMBER CAREFULLY CHECKS FOR CORRECT GAS PRESSURE AND
GAS LINE SIZING WHEN INSTALLING THE FIREPLACE.
IT IS CRITICAL TO CAREFULLY CHECK FOR GAS LEAKS WHEN HOOKING UP THE FIREPLACE. CHECK WITH SOAP AND WATER
SOLUTION OR COMBUSTIBLE GAS SNIFFER.
BE SURE TO INSTALL CSST FLEX GAS LINE WITH BRASS-TO-BRASS FITTINGS TO PREVENT GAS LEAKS AT CONNECTIONS.
GAS SUPPLY PIPING MUST INCLUDE A DRIP LEG TO ELIMINATE THE POSSIBILITY OF CONTAMINANTS ENTERING THE GAS
TRAIN. ADHERE STRICTLY TO LOCAL AND NATIONAL CODES.
Gas Supply Line Sizing
This Mendota Gas Fireplace comes equipped with a 1/2" N.P.T. Female inlet. Gas supply piping must enter the Fireplace cabinet
on the right side.
Use the table, below, to determine the proper gas line diameter that must be installed to run from the supply regulator to the
fireplace. Refer to the following table for proper gas pipe diameters.
PIPE LENGTH
[FEET]
SCHEDULE 40 PIPE
INSIDE DIA.
TUBING, TYPE L
OUTSIDE DIAMETER
NAT. L.P. NAT. L.P.
0-10 1/2" [1.3 cm] 3/8" [1.0 cm] 1/2" [1.3 cm] 3 /8" [1.0 cm]
10-40 1/2" [1.3 cm] 1/2" [1.3 cm] 5/8" [1.6 cm] 1 /2" [1.3 cm]
40-100 1/2" [1.3 cm] 1/2" [1.3 cm] 3/4" [2.0 cm] 1 /2" [1.3 cm]
100-150 3/4" [2.0 cm] 1/2" [1.3 cm] 7/8" [2.3 cm] 5 /8" [1.6 cm]
150-200 3/4" [2.0 cm] 1/2" [1.3 cm] 7/8" [2.3 cm] 3 /4" [2.0 cm]
NOTE: Some areas allow copper tubing or galvanized pipe - check with local approval agencies and codes NEVER use plastic
pipe.
Figure 3-32 Gas Pressure Test Ports
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Gas Pressure Requirements and Checking
Two pressure taps for checking input and output gas pressures are located on the main gas valve. A qualified installer should
use this fitting for setting the correct gas pressure during initial installation.
The appliance and its appliance main gas
valve must be disconnected from the gas
supply piping system during any pressure
testing of that system at test pressures in
excess of 1/2 psi (3.5 kPa).
The appliance must be isolated from the gas
supply piping system by closing its equ ipment
shut -off valve during any pressure testing of
the gas supply piping system at test pressures
equal to or less than 1/2 psi (3.5 kPa).
Drip Leg Requirement
A drip leg/ sediment trap must be installed within the
main gas supply line serving this appliance.
Figure 3-34 Drip Leg/ Sediment Trap
Manual Gas Shutoff Valve Requirement
If local building codes require one, obtain an external keyed wall-mounted or
floor-mounted manual gas shutoff valve approved per local gas plumbing codes
and install per local gas plumbing codes in the specified location. Local
requirements supersede all other codes.
Figure 3-33 Main Gas Valve
Figure 3-35 Keyed Manual Gas Shutoff
Valve
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Factory Installed Manual Gas Shutoff Valve
A manual gas shutoff valve is factory installed and located on the right side of the fireplace. Remove the slotted cover plat e on
the right side of the fireplace to access the valve handle. To operate the manual gas shutoff valve, insert the tip of the glass
latch tool into the hole in the ball valve handle, or use your hand. Rotate the tool downward 90 -Degrees or until it stops to fully
close the Valve. To open valve, insert tool in valve bracket rotate upward 90-degrees or until it stops.
Figure 3-36 EMERGENCY GAS SHUTOFF
Gas Inlet Fittings Information
Caution: Before you run the gas line, read, unders tand and properly calculate the required gas line size.
Improper (too small) gas line size application can lead to improper burner ignition and can cause property
damage and/or injury. If you are not qualified or certified to run a gas line, do not proceed . Contact a
qualified Gas Plumber.
The gas inlet fitting supplied with this Fireplace provides a 1/2” female NPT fitting. This requires you to supply a ½” NPT male
fitting for connection to this appliance.
Based on the gas line size you have selected use an appropriate NPT fitting to adapt and connect to the 1/2” male NPT flex end
adapter.
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Gas Input Rate Verification
Natural Gas Input Rate Verification
1. Verify main orifice size. The main orifice body has the orifice hole size stamped on it. NG orifice size shall be #33 for
0-2000 ft and #34 for 2000-5000f.
2. Verify that the Manifold Gas Pressure is within 3.5" WC +/-
1/8". Once setup, read the main home gas supply meter
reading.
3. Write the initial reading here >> initial gas meter reading
Turn off all other appliances and their pilot flame in the home.
4. Run this appliance for a period of 30 minutes on maximum flame size. Turn off main burner and pilot
flame. Read the main home gas supply meter reading after the 30 minutes of burn time.
5. Write the reading here >> final gas meter reading
Calculate the following:
6. FINAL GAS METER READING - INITIAL GAS METER READING...Subtract initial gas meter from final gas meter
reading. This will yield the number of Therms used during the 30-minute burn time.
7. Multiply the result in Item #6 by 100,000.
8. Multiply the result in Item #7 by 2. Write down the result here >>
9. The result in item #8 shall be at least the maximum input rate (34,250 Btu/Hr) for all altitudes.
LPG Input Rate Verification
Verify main orifice size. The main orifice body has the orifice hole size stamped on it. LPG orifice size shall be #50 (0-
2000ft) and #51 (2000-5000ft).
Verify that the manifold gas pressure is within 10.0" WC +/- 1/8".
High Altitude De-Rating
If you are de-rating this appliance at a high altitude, attach the High Altitude De-Rating Label, supplied in the Owner’s
Manual Packet, to the back surface of the listing label plate located in the air gap on the side of the Fireplace. If you
are also converting the Fireplace for LP Gas attach the labels included with the conversion kit to the same surface.
Prior to attaching the label, fill in all the information that is requested on the label.
For installations from 610-1370 meters (2000-4500 ft.) the orifice sizes (DMS) for Natural Gas is #34 and Propane Gas is
#51. See data plate for additional information. For high altitude installations consult the local gas distributor or the
authority having jurisdiction for proper rating methods. If the installer must convert the unit to adjust for varying
altitudes, the information sticker must be filled out by the installer and adhered to the appliance at the time of
conversion."
This appliance has been converted for use at an altitude of:
Orifice size: Manifold Pressure:
Input (Btu/h): Fuel Type:
Date of conversion: Converted by:
Cet appreeil a été converti au ____
Injecteur ________
Pression à la tubulure d'alimentation _____________
Déoit calorifique ______________
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INSTALLATION INSTRUCTIONS
4.1 INSTALLATION CHECKLIST
The instructions provided in this chapter are arranged in the sequence of occurrences.
This installation checklist is supplied as a guide for installers to follow step by step. As you complete each step of the installation
work, check mark the completed work item in the list, below. All items in this installation checklist must be completed. When all
work is complete, fill in your name and the date this installation was completed.
❑ Unpack the Fireplace body.
❑ Open and inspect the Manual Packet.
❑ Unbolt the Fireplace body from the wooden pallet.
❑ Bend up the shipping clips.
❑ Place Fireplace body inside Framed Chase, level and plumb fireplace body and secure to framing studs.
❑ Open the Fireplace Glass Door.
❑ Install the Accent Light bulb and Light Lens.
❑ If planning to burn LPG, perform the NG to LPG conversion work.
❑ Measure chimney Length required.
❑ Install Vent System.
❑ Sealant is not required at vent joints. Do not use silicone sealants in vent connection joints anywhere.
❑ Adjust vent damper to match vertical chimney length. See 4.11.1 Vent Damper Adjustments
❑ Co-axial vent rigid pipe, wall vent cap or roof vent cap is installed by a Mendota approved
serviceperson in accordance with instructions.
❑ All joints are secured, "twist-locked" and leak-proof.
❑ Horizontal or vertical vent cap is installed "right-side-up" and tightly sealed to structure per
instructions. Vent Caps are Mendota approved.
❑ Proper exterior and interior clearances for vent systems and locations for wall vent cap/roof vent cap
are maintained.
❑ Correct gas pressure, proper size gas lines and gas leaks are checked.
❑ 120 V electrical service and gas supply is installed in accordance with instructions and local and
national codes.
❑ Telescoping sections are not separated. They were used as complete assemblies.
❑ Connect Gas Supply to the Fireplace. Verify that gas pressures are proper and perform a complete leak test of all field
installed gas joints and factory installed gas train joints using a gas sniffer.
❑ Verify orifice sizes.
❑ Verify gas input rates.
❑ Connect Electrical Supply to the Fireplace. See Error! Reference source not found. Error! Reference source not fo
und. .
❑ Install firebox inner liner kit. Follow instruction supplied with the Liner Kit.
❑ Install log set, coals and inswool media.
❑ Install Glass door and assure that it is in proper closed position and centered in firebox opening.
❑ Test fire Fireplace.
❑ Teach consumer how to use remote control and all functions of this Fireplace
❑ Complete warranty registration at http://mendotahearth.com/gas-fireplace-and-stove-registration.php
This installation was performed and completed by: Date:
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4.2 UNPACKING THE FIREPLACE
The Fireplace arrives from the factory on a wooden pallet with a cardboard box encasing the pallet and Fireplace. To remove
the outer box, identify and remove four Philips head drywall screws that secure a cardboard L pincher at the bottom of each
corner of the box.
Lift the outer box vertically straight upward until lower edge of the box clears the top of the unit body. Set the box aside.
Mendota recommends recycling the outer box.
Figure 4-1 Outer Box Removal
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4.3 CONTENTS OF THE MANUAL PACKET
Once the outer box is removed, you will find the Fireplace body and a manual packet white box. This manual packet white box
includes the items shown in the table, below. Contact Mendota Technical Service if any parts are missing.
Glass Latch Tool #HA-77-00256
Must Leave with Homeowner.
Remote Control Transmitter # 05-02-00408. 3-AAA
Batteries # 65-06-01147.
Must Leave with Homeowner.
Backup Battery Holder #05-02-00345 & QTY 4- AA
Batteries #65-06-01147.
Must Leave with Homeowner.
Backup Power Harness #10-03-00128
Must Leave with Homeowner.
Light Bulb, G9 Xenon, 25w. #10-11-00020
Installation Required.
Two light lens kits are used on this fireplace.
Light Lens Assembly Packet # HA-88-00167
(Light Lens, Lens Retainer Bracket w/ gasket, four 10-
24 Nuts, Lens base gasket).
Installation Required.
Owner’s Manual.
Must Leave with Homeowner. This Manual
Figure 4-2 Manual Packet Contents
4.4 WHAT IS NOT INCLUDED WITH THIS APPLIANCE?
Log set, firebox lining or decorative front are not included with this base Fireplace product. One of the many log set and media
options, firebox inner liner options, and decorative fronts options must be selected and purchased separately.
4.5 UNBOLTING FIREPLACE FROM PALLET
The Fireplace body is bolted to the pallet top surface using 5/16” X 1” Lag Screws in three points. One on each side and one or
more at the rear. Use a 1/2” socket and wrench to remove the lag screws and detach fireplace from the pallet top.
Figure 4-3 Unbolting Unit from Pallet
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4.6 BENDING UP THE SHIPPING CLIPS
Once the unit is detached from the pallet by removing the securing lag screws that hold these shipping clips to the pallet, either
bend these clips up 90-degrees or break them off using a screw driver and back and forth cold working motion (see below). A
bending relief is provided within the clip to ease bending or breaking. Bending the shipping clips up or removing them will be
necessary for Fireplace units which are to be installed in narrow width or shallow depth openings.
To bend the clips up or to break them off, follow these procedures:
1. Fireplace the tip of a flat screw driver (longer screw driver is better) under the clip.
2. Lift screw driver handle upwards and bend the clip up about 45-degrees.
3. Remove screw driver. Fireplace screw driver tip into one hole in clip. Lift screw driver up. To break clip off, repeat up down
motion of screw driver seven to eight times.
Figure 4-4 Shipping Clip
STEP 1 & STEP 2
Figure 4-5 Bend Up Clip 1
STEP 3
Figure 4-6 Bend Up Clip 2
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4.7 TO REMOVE DOOR
Use the glass latch tool to disconnect the spring latches from the glass frame. Insert tool into hole in latch, pull towards you and
rotate 90-degrees to disengage top latches. Remove tool. There are two spring latches on top of this gas fireplace. Always make
certain the hook glass latches are in the upside-down position after removing the glass frame. This upside -down latch position
will make it easier to reinstall the glass frame later.
With both hands, rotate top edge of glass frame away from unit, approximately 8”.
Lift glass frame up 1”, at an angle, and move away from unit.
Door is now free from unit.
NOTE: Always check glass gasket condition and gasket seal any time the glass door is remove d and when
reinstalling glass door.
4.8 TO REPLACE DOOR
1. Line up the five bottom tabs on the glass frame with the slots on the bottom of the firebox. Fireplace tabs into slots
and center tabs in slots, left to right.
2. Center glass frame over firebox; left to right.
3. After door has been placed into slots, rotate door towards firebox until gasket seal is
touching the firebox frame.
4. Use the tool provided to connect the spring latches to the glass frame. Fireplace tool into hole in spring latch, pull latch
towards you, rotate latch so the hook is facing downward then release latch to hook to door frame.
Door is now connected and sealed to unit.
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4.9 LIGHT BULB AND LIGHT LENS INSTALLATION
WARNING: Failure to position the parts in accordance with these diagrams or f ailure to use only part s
specifically approved with this appliance may result in property damage or personal injury.
Before you install a firebox inner, liner kit, or a log set. Install the accent light bulb and the accent light lens kit. To install the light
bulb and light lens kit, follow these instructions:
1. Identify the two light bulb sockets. They are located within the top metal baffle.
Figure 4-7 Light Housing
Caution: Do not touch the light lens with bare hands. Always use the protective foam wrap supplied with the
light bulb or a pair of clean cloth or neoprene gloves to handle the light bulb. Touching the light bulb will
leave oils and dirt on the lens and will cause premature failure of the light b ulb.
2. Slide base of light bulb inside light bulb holder base after aligning the bulb base shape with the recessed shape
in the bulb holder. Push up all the way.
3. Next, see diagrams, below. Install the light lens base gasket, light lens, light lens retainer bracket and the four
retaining 10-24 nuts.
Warning: Use a 3/8” hex hand driver to tighten nuts.DO NOT over tighten the nuts. Doing so can crack the
light l ens.
Figure 4-8 Accent Light Bulb & Lens Installation
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4.10 NATURAL GAS TO LPG CONVERSION
A natural gas to LP gas conversion kit #HA-96-00023 must be ordered and installed in this fireplace to burn LP gas.
LP conversion kit #HA-96-00023 contains the following parts: one motorized LP pressure regulator #907.012, one cap orifice
#65-14-00049 (drill #50), an L-shaped Torx wrench and an LP conversion label.
Figure 4-9 LP Kit Contents
Procedure to Convert Fireplace for LP Gas
This fireplace arrives from the factory ready to burn natural gas. If you intend to burn LP gas, it is highly recommended that you
convert this fireplace and its pressure regulator, pilot natural gas/LP clip position and burner orifices prior to placing this
fireplace in its fireplace cavity.
Follow the step below to prepare this fireplace for conversion to LP gas:
1. Remove the glass frame. Directions to remove the glass frame are in this manual. See section “TO REMOVE DOOR”
2. Remove the floor plate from the fireplace. The floor plate goes around the pilot. When lifting the floor plate be careful to lift it
straight up past the pilot hood. Then hold the floor plate at an angle to get it thr ough the front opening of the fireplace.
3. Using a ¼” hex driver, remove the right-side front access panel from the fireplace.
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4. Next remove the burner from the fireplace. Remove the two screws from each end of the burner. Then rotate the burner 90
degrees to the front so that the burner legs clear the air box. Then slide the b urner to the left to remove it from the air shutter
box. The burner will then be free and can be removed from the fireplace.
5. You will now be able to access the burner orifice, which is located inside the air shutter box. Using a ½” deep well socket
wrench, remove the orifice. When removing and installing the orifices be sure to use a wrench to keep the fitting the orifice
screws onto from rotating.
6. Thread a new #50 orifice on the orifice mounting brass fittings. Tighten down the orifice. Nex t continue to follow the
instructions to convert the pilot for LP Gas.
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CAUTION: Always use one 7/16” open end wrench and one large pliers or vice grips tool to hold, loosen and
tighten pilot hood base to prevent damage to pilot mount bracket.
7. While holding the pilot base body with large vice grips tightly, loosen the pilot’s hex-shaped base using a 7/16” open end
wrench. Rotate counter clock-wise ¼ turn to loosen.
8. Pilot arrives from the factory set for natural gas. Push natural gas/LP adjustment clip inward all the way to set it for LP. See
detail view, below. If you see “NAT” printing on the adjustment clip, this indicates that the pilot is set to burn natural gas. Push
the clip in so that “NAT” is not visible.
9. Tighten down hex-shaped base of pilot using a 7/16” open end wrench.
10. After the pilot is converted reinstall the burner and floorplate. Remember to be careful when placing the floor plate around the
pilot to avoid damaging the pilot.
11. Next, the pressure regulator will be changed. Access the pressure regulator through the right-side, front access panel that was
removed. If needed the heat shield that sits above the gas valve can be removed. The heat shield is held on with one screw on
the left side of the opening.
12. Shut off the gas supply to the valve and shut down the electric supply.
Note: Be careful when removing or tightening the screw on the back of the pressure regulator. The screw location is difficult
to access, and care must be taken to ensure a proper seal when tightened.
Figure 4-10 Pilot Body
Figure 4-11 Pilot Orifice
Selection
Figure 4-12 Pinch Pilot Base with Vice
Grips
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Pressure Regulator Conversion
WARNING: Failure to position the parts in accordance
with these diagrams or failu re to use only parts
specifical ly approved with this appliance may result in
property damage or personal inj ury.
1. See Figure 3-12-1: Using a Torx T20 (supplied) or slotted
screwdriver, remove and discard the two pressure-regulator
mounting screws (A); pressure-regulator tower (B); and the
spring and diaphragm assembly (C), if applicable.
2. See Figure 3-12-Figure 2: Ensure the rubber gasket (D) is
properly positioned. The rubber gasket is pre-fitted as part of
assembly (E).
3. See Figure 3-12-Figures 3 and Figure 3-12-4: Install the new
stepper motor pressure regulator assemble. Use the provided
screws (F), M4 x 0.7 threaded; length of thread L= (16mm + 0 –
0.5mm), steel material, resistance class 8.8 (Figure 3-12-5).
4. Manually thread the two-conversion kit mounting screws into
the valve body. Use a standard screwdriver or T20 Torx bit and
tighten to the screws with a fixing torque of 25lb-in, plus or
minus 5.
Note: If the threads of the value are stripped or damaged,
replace the valve.
5. Install the enclosed identification label (G) to the valve body
where is can be easily seen.
Warning: Installation should be carried out i n a clean
environment.
Warning: This modulating conversion kit must only be
applied as part of a conversion kit supplied by the
fireplace manufacturer for specific fireplace and type
of gas being converted.
Warning: Correct operation of the system cannot be
guaranteed if the conversion kit or value have been
dropped or sustained strong impact.
Figure 4-13 Pressure Regulator Conversion
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Burner Ignition Characteristics
Note: Connect gas supply and verify that the minimum inlet and outlet pressures are co nforming.
Once the conversion to LPG and all the above steps have been completed, light the main burners.
Use remote transmitter to turn on pilot light and burners. Main burner should now light IMMEDIATELY and flame should not
"lift" off burner. If there is any delay in ignition or if flame is "lifting off" burner, turn off burner and carefully check for proper
installation of logs/coals, vent system and proper pilot flame impingement on burner. Logs or coals must not block pilot flam e
or main burner flame. Vent system must be leak proof.
WARNING: Do not proceed with operation of this fireplace unless burner "cycles" on/off without delays!
Pilot Flame and Burner Relationship Verification
Prior to completing the LPG conversion process, the qualified service technician must light the pilot light and veri fy the
relationship between the pilot light flames and the main burners. The pilot light flames directed towards the propagation por ts
on the rear and front burner must overlap the propagation ports on the burners.
The pilot light flames must be a minimum of 1” long and must overlap the propagation ports on both the
rear and front burners as shown in the diagram, below. Verify that the burner tubes ignite quickly and the
burner flames propagate smoothly along the entire length of the burners.
Figure 4-14 Pilot Flames
Pilot Flame and Burner Ports
1" MIN.
1" MIN.
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4.11 VENTING
WARNING: Proper installation of the vent system, as required in this manual, is vital to the performance of
this Fireplace . Oversights or failure to c onform to all installation requirements will void the applicable
warranty.
The ML39 Fireplace must be vent ed vertically to the outside and must use one of the approved co-linear
flexible ducting system s or a coaxial flexible ducting system .
This heater m ust be properly connected to a venting system in accordance with the manufacturer's
installation instructions. Operation of this heater when not connected to a properly installed and
maintained venting system can result in carbon monoxide (CO) poisoning an d possibly death.
If the vent system of this appliance is disconnected for any reaso n, the vent and air intake systems must be
proper ly reassembled and resealed before this appliance is put into use.
CAUTION: Each installation must conform to all local, s tate and national codes. Refer to the national fuel
gas code and local zoning and co de authorities for details on installation requirements. The Mendota
Fireplace s must be vented to the outside in accordance with the latest edition of the National Fuel Gas
Code. In the absence of local codes, the installation must conform with National F uel Gas Code ANSI Z223.1
(NFPA 54), or Canadian Code CAN1 -B149 or most current edition, also known as NFPA 54. Do not connect
this Fireplace to a chimney flue serving a se parate solid fuel or gas -burning appliance.
The ML39 Fireplace must be vented to the outside and must use one of the approved coaxial rigid ducting
system s or a coaxial flexible ducting system . Do Not Use any silicone sealants at pipe joints. Stove
gasket cements may be used at pipe joints but is not required .
Wall Thimble Information
A wall thimble is required to be installed when penetrating any combustible wall, regardless of whether the wall Is an internal wall
or an external wall.
Wall thimbles are designed to reduce the required clearances to the exterior surfaces of the vent pipe th at pass through
combustible walls. The hole size that is specified to be cut in the wall for installation of the wall thimble takes into cons ideration the
reduced clearance requirement.
High Altitude Installation Information
Prior to installing at altitudes higher than 7500, please contact the Mendo ta technical service department for specific venting
requirements and venting restrictions.
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ML39 Master Venting Chart
Note: This chart is applicable to both natural gas and LP installations.
❑ 9” minimum vertical pipe run required to be connected directly to this fireplace’s flue starter collar.
❑ Maximum horizontal run allowed with the minimum 9” vertical run is 12”.
❑ Maximum vertical run allowed is 40’.
❑ Maximum vent system length allowed is 44’.
❑ 32’ maximum horizontal run allowed with a minimum 4 to 12’ starter section. Three 90° elbows may be installed anywhere within
the 32’ horizontal run. If the starter vertical section is less than 4’, use the chart and reduce 3’ for every 90° elbow installed after
the first 90° elbow.
❑ For all vertical terminations, four 90° elbows allowed. However, the fourth 90° elbow must point vertically and directly to the
vent termination cap.
❑
Maximum Horizontal Run
❑ Maximum Horizontal Run allowed is 32 feet if a vertical starter section that is between 4 feet to 12 feet is connected
directly to this fireplace’s flue starter collar and no more than three (3) 90 -degree elbows are used.
❑ Maximum Horizontal Run allowed is 12” if a 9” starter vertical section is connected directly to this fireplace’s flue
starter collar.
Maximum Vent System Length
❑ Combined total length of all straight pipe sections in the vent system shall be less than 44 feet.
❑ Combined total length of all straight pipe sections in the vent system shall be less than 44 feet when using three (3) 90-
degree elbows or equivalent and terminating the vent system horizontally.
❑ Combined total length of all straight pipe sections in the vent system shall be less than 44 feet when using four (4) 90-
degree elbows or equivalent and terminating vertically.
13
'
-
9
"
18
'
-
3
"
22
'
-
1
0
"
27
'
-
5
"
32
'
-
0
"
3'
-
5
"
12
'
-
1
1
"
22
'
-
6
"
32
'
-
0
"
9"
1'-0"
2'-0"
3'-0"
4'-0"
12'-0"
16'-0"
20'-0"
24'-0"
28'-0"
32'-0"
36'-0"
40'-0"
1'
-
0
"
8'-0"
4'
-
0
"
8'
-
0
"
12
'
-
0
"
16
'
-
0
"
20
'
-
0
"
24
'
-
0
"
28
'
-
0
"
4'
-
7
"
9'
-
2
"
V min H max
9” 12”
12” 3’ 5”
2’ 12’ 11”
3’ 22’ 6”
4’ – 12’ 32’
12’ – 40’ Varies
Figure 4-15 MASTER VENT CHART
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How to Calculate the Vent Lengths
For calculation purposes and usage of charts in this manual, simply add the lengths of all individual str aight pipe sections. For
example: if you use two 2-foot lengths and one 4-foot length, the total vent system length will be 2+2+4 = 8 feet.
Using 900 Elbows
The ML39 Fireplace by MENDOTA allows maximum flexibility in the use of 90o elbows in the vent system. The length of the first
straight vertical section directly connected to the fireplace’s starter collar determines the maximum horizontal run and the
number of 900 elbows allowed for this fireplace.
For vent systems that provide a starting vertical section that is 4’ to 12’, you may connect up to 32’ of horizontal pipe and up to
three 90° elbows. For all vertical terminations, four 90° elbows can be used the fourth elbow must point vertically.
Using 90° Elbows When the Initial Starter Vertical Section Is Less Than 4’
For vent systems that provide a starting vertical section less than 4’ the following rules apply:
A. You must use the Master Venting Requirements Chart.
B. A single 90° vertical-to-horizontal elbow is already calculated into the allowable maximum horizontal run. The Venting
Requirements Chart assumes that for all horizontal runs calculated, one 900 elbow is used within the venting system.
Note: Each additional 90° elbow reduces the maximum horizontal distance allowed by 3'.
C. If you plan to use more than one 90° elbow within the vent system, first use the Venting Requirements Chart and
calculate the maximum horizontal run you are allowed based on the first vertical section co nnected directly to the
fireplace. From this maximum horizontal run calculated, subtract 3’ for each additional 90° elbow you will use.
Example: Assume you are using a 3’ long starter vertical section. This should allow, per the Master Venting Chart, 22 ½’ of
horizontal run. If you want to use three 90° elbows, subtract 6’ for two elbows from the 22 ½’ maximum allowed (3’
for each elbow after the first elbow). This yields 16 ½ ’ as the maximum horizontal run that you are allowed to
install using the 3’ vertical starter section.
Caution: If a vertical-to-horizontal discharge elbow or a horizontal-to-horizontal discharge elbow is enclosed within a wall, floor or
ceiling, a top air space clearance of 3" must be maintained above the entire body of the elbow.
Using 45-Degree Elbows
Two 45-degree elbows may be used in place of one 90-degree elbow. On 45-degree runs, one foot of diagonal pipe is equal to
8-1/2 inches horizontal run and 8-1/2 inches vertical run. Two 45-degree elbows may be connected directly to the vent starter
adapter on this fireplace to create an offset to provide the required clearances to combustible framing or sheathing materials.
Two 45-degree elbows may be connected directly to the top of this fireplace to create a horizontal offset. 32 feet maximum
horizontal run allowed with this offset configuration only if the first vertical section connected directly to the last 45 -degree
elbow is more than 4 feet to 12 feet long. For maximum allowable horizontal distances with the 45-degree offsets, see the
Master Venting Configuration Chart.
Note: Each horizontally positioned 45º elbow reduces the maximum horizontal distance by 1½ '.
SUPPORT: Horizontal runs of pipe will require one vent support for every 3 ft. of pipe.
Zero Rise Horizontal Termination
The ML39 Fireplace must be installed by a qualified Mendota approved serviceperson.
A maximum horizontal run of 12” is allowed if a 9” vertical starter section and one 90° elbow is connected directly to this
fireplace’s flue starter collar. The horizontal centerline of the 90ºelbow will be 59 1
2 inches up from the floor level of this
fireplace.
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See, MASTER VENTING CHART and Figures, below.
Use "fixed" pipe sections in place of adjustable pipe sections
wherever possible.
Always maintain 1" clearance from vent pipe sides and bottom to
combustibles, 3" clearance on top of pipe on horizontal runs and on
top of horizontal discharge elbows. Do not fill air spaces with
insulation or other material.
Position fireplace in desired location. See guidelines on proper vent
cap placement on the exterior of home. Check to determine if wall
studs are in the way when venting system is attached. If this is the
case, you may want to adjust the fireplace location or modify the
exterior wall framing to allow the vent system to penetrate the
wall.
Measure from the floor level of the fireplace up 59 1
2 inches [add ¼”
rise for every foot of horizontal run] and mark wall directly at the
center of where the vent pipe will penetrate the exterior wall.
Cut and frame a 10-3/4" wide x 10-3/4" high opening in the wall.
The hole must be positioned so the vent system will run level or
have a ¼" rise per foot of run AND be perpendicular to the wall.
The height of the opening must be located to meet all local and national building codes. Do not allow the termination to be
easily blocked or obstructed. If wall being penetrated is non -combustible material, i.e. masonry block, brick, etc., a 9-inch
diameter hole is acceptable.
Attach the 9” straight section to the fireplace starter adapter. Attach a 90° elbow to the top of the 9” vertical starter section
and rotate and lock in position. Attach a horizontal section to the 90° elbow. Be sure all vent component connections are in
their fully twist-locked position and are leak-proof.
The length of the horizontal piece that fits through the wall will be determined by the location of the fireplace relative to the
wall. For a normal installation where this fireplace is installed directly against an exterior wall constructed using 2x4 lumber or
2x6 lumber, only a 6” horizontal section is required.
There must be a minimum of 1" air space clearance to combustibles from all vent components (3" above horizontal runs and
horizontal discharge elbows).
A wall thimble must always be used when penetrat ing combustible wall materials.
From the exterior of the home, slide the horizontal vent cap over the end of the horizontal pipe and tightly secure the cap t o
the wall with screws. Seal with a high-quality caulking.
NOTE: Combustible wall thickness must be 4" to 8" maximum
NOTE: Vent Cap should not be recessed into wall or siding.
Figure 4-16 VENT CENTERLINE
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Vertical Rise Horizontal Termination
The minimum vertical section required to be connected directly to the starter adapter on this fireplace is 4’ when used with a
maximum horizontal run of 32’. If the total length of the vertical sections connected directly to the starter adapter on this
fireplace is between 4’ and 12’, you are allowed a maximum 32’ horizontal run. This fireplace provides a maximum flexibility in
the use of 90° elbows when more than 4’ of vertical starter section is connected to the starter collar. If 4’ or more vertical
section is connected to the starter collar, you may use three 90° elbows for horizontal terminations. For other venting
configurations within these maximum limits, see Master Venting Chart.
Combined total length of all pipe sections in the vent system should be less than 44’.
NOTE: The horizontal run of vent pipe must be level or have a ¼" rise for every 1' of run toward the
termination. Neve r allow the ven t to run downward. This will cause high temperatures and the possibility
of a fire.
Follow these steps to install venting:
1. Position fireplace in desired location. Check to determine if wall studs are in the way when vent system is attached. If this is the
case you may want to adjust the fireplace location.
2. Locate where vent pipe will pass through any ceilings and will penetrate the outside wall. Since vent pipe sections "overlap,"
we suggest pre-assembling and measuring the total vent pipe run so you can more accurately locate the point where the vent
pipe will penetrate the outside wall. Be sure all vent components are properly twist locked and leak -proof. Be sure 1000°F
sealant is used in the inner pipe joints of all pipe sections manufactured by Simpson DuraVent.
3. Cut and frame a 10 ½” wide x 10 ½” high opening in the outside wall openings and 10” x 10” opening in ceiling openings. The
outside wall hole must be positioned so the vent system will have a ¼" rise per foot on horizontal runs and be perpendicular to
the wall. The height of the opening must be located to meet all building codes and not allow the termination to be easily
blocked or obstructed. A ceiling fire stop spacer is required at any floor (ceiling) opening.
4. The horizontal pipe must end flush with the exterior wall of the home. Horizontal pipe will requ ire a proper support every 3’ of
vent pipe. There must be a minimum of 1" clearance to combustibles from all vent pieces on the sides and bottom and 3"
above horizontal runs.
5. A wall thimble must always be used when penetrating combustible wall materials.
Note: Combustible wall thickness must be 4" to 8" maximum.
Note: Do not separate telescoping section. They be must be used as complete
assemblies.
6. From the exterior of the home, slide the horizontal vent cap over the end of the
horizontal pipe and tightly secure the vent cap to the wall with screws. Seal with high-
quality caulking around the outer perimeter of the vent cap.
Note: Vent cap should not be recessed into wall or siding.
V(2’ MIN) H1 + H2 MAX
2’ 9’ 11”
3’ 19’ 6”
4’ 32’
4’ – 12’ 32’
For V greater than 12’, see
Master Venting Chart
Vertical Rise
Three 90° Elbows
Horizontal Termination
Use the Master Venting Chart
to calculate allowable lengths.
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Vertical Through-The Roof Venting
The maximum vertical run of vent pipe is 40 ft. from the top of the fireplace. The fireplace will support a run of a maximum of
40 ft. Maintain 1" air space clearances on all sides of vents (3" above horizontal runs).
If an offset is required directly on top of the fireplace, two 45o elbows may be connected directly to the top of this fireplace to
create a horizontal offset then to run upwards vertically. Doing so will continue to allow the use of the 51 feet maximum
vertical run.
Follow these steps to install venting
1. Place the fireplace in its desired location. Drop a plum bob from the ceiling to the position of the fireplace flue exit.
Mark the location where the vent will penetrate the ceiling. Drill a small hole at this point. Next, drop a plum bob from
the roof to the hole previously drilled in the ceiling. Mark and drill the spot where the vent will penetrate the roof.
Determine if ceiling joists, roof rafters or other framing will obstruct the venting system. You may wish to relocate the
fireplace or to offset, to avoid cutting load bearing members.
2. Cut and frame a 10" x 10" opening in the ceiling centered on the hole drilled in Step No. 1.
3. To determine the length of the vent pipe required, measure the distance from the fireplace flue outlet to the ceiling,
the ceiling thickness and the vertical rise in the attic or second story and allow sufficient vent height above roofline. For
two story installations, fire stops are required at each floor level. If an offset is needed in the attic, additional pipe an d
elbows will be required.
4. Assemble the desired lengths of vent pipe and elbows to reach from the fireplace flue outlet. Ensure that all vent pipe
and elbow connections are in their fully twist-lock position and that inner pipe joints are sealed and are leak-proof.
Maintain 1" airspace clearances to combustibles (2" above horizontal runs). Cut a 10" x 10" opening in the roof,
centered in the small drilled hole placed in the roof in No. 1. The opening should be a sufficient size to meet all
clearance requirements. Continue to assemble lengths of pipe and elbows necessary to reach up through the roofline.
Galvanized pipe and elbows may be utilized in the attic, as well as above the roofline. The galvanized finish is desirable
above the roofline due to its higher corrosive resistance.
5. If an offset is necessary, it is important to support the vent pipe every 3 ft. to avoid excessive stress on the elbows and
possible separation. Wall straps are available for this purpose.
6. Slip the flashing over the pipe sections protruding through the roof. Secure the base of the flashing to the roof with
roofing nails and seal flashing to roof. Ensure the roofing material overlaps the top edge of the flashing. Verify you
have at least the minimum clearance to combustibles at the roofline.
7. Continue to add pipe sections until the pipe and the vent cap meet the minimum building code requirements, as
outlined in No. 8 on the following page.
8. For multi-story vertical installation, a ceiling fire stop is required at the second floor and any subsequent floors. The
opening should be framed to 10" x 10" inside dimensions as described in step No. 5.
9. Any occupied areas above the first floor, including closets and storage spaces, which the vertical vent passes through,
must be enclosed. The enclosure may be framed, and sheet rocked with standard construction materials, however, be
sure to maintain minimum allowable clearances between the outside of the vent pipe and the combustible surfaces of
the enclosure.
Height "*H" from roof surface to the top of vent cap can be determined as follows:
Complete installation with storm collar and vent cap.
"H" DIMENSION
ROOF PITCH FEET METERS
FLAT to 6/12 2 .6
7/12 to 9/12 2 .6
10/12 to 12/12 4 1.2
13/12 to 16/12 6 1.8
17/12 to 21/12 8 2.4
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Vertical Through-The-Roof Venting Using Four 900 Elbows
In extreme situations, four 900 elbows may be required to reach a proper exit point for the vent system. Mendota has spent
considerable time and effort in the design of this fireplace and its venting system . Through this effort, Mendota has been able
to certify the use of Four 900 elbows.
The use of Four 900 elbows must meet some minimum prerequisites.
Prerequisite #1: The vent system must terminate vertically using a vertical vent cap.
Prerequisite #2: There must be a minimum 4 feet of vertical starter section connected directly to the top of this fireplace.
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Vent Damper Adjustments
This fireplace is equipped with a vent damper system that can be adjusted using the glass latch tool. Lo cate damper adjustment
rod above the glass frame in convection chamber at the center. If this fireplace’s vent is terminated horizontally, DO NOT CL OSE
the vent damper completely. Adjust position of damper by judging the flame characteristics after 20 minu tes of burn time. If the
flames ghost off burners or if sooting occurs [in LPG units], open the vent damper FULLY and work backwards in increments to
determine the correct damper position for that particular installation.
To adjust the damper look into the convection air cavity and note the Damper Position Indicator. Hook glass latch tool in the
hole at the end of the damper rod, pull outward about 1/8” and turn clockwise to close the vent damper, release. The base of
the damper adjustment rod has a pointer that indicates the position of the damper.
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4.12 LOG SET/ MEDIA INSTALLATION
Three distinctive wood species log sets are available as options for this model Fireplace.
1. Norway Spruce Log Set
2. White Oak Log Set
3. Birch Log Set
4. Driftwood Log Set
5. Forest Oak Log Set
In addition to the log sets other medias are also available. These media kits can be combined or used with log sets. These
include:
1. Clear Glass Diamond, ¾”
2. Clear Glass Diamond, ¼”
3. Black Glass Diamond, ¾”
4. Midnight Black Glass
5. Liquid Clear Glass
6. Ice Cube Glass
7. Natural River Rock
8. White Tumbled Marble
Installation Instructions for each log set are included with the individual log set. Follow those instructions to install one log set.
Note: Installer, save and giv e the copy of the Log Set Installation Instructions to the homeowner for future
references.
4.13 LIGHTING CHECKLIST
Be sure to check these items before final operation of the Fireplace.
☐ All items on "Installation Checklist" must be completed.
☐ Carefully follow all lighting and log installation instructions. Make certain that pilot flame and burner light correctly.
☐ Gas leaks and gas pressures prior to installing facing materials is checked.
☐ Fresh batteries are in remote control. Follow “First-Time Lighting Instructions” to synchronize the remote control and the
ignition module.
☐ Air shutter opening 0" to ⅛" for natural gas or ¼” to fully open for LP gas is checked.
☐ All lighting and log installation instructions were followed.
☐ Burner lights and flame runs promptly to the entire burner.
Note: Do not proceed with operation unless burner cycles "on/off" without delays.
☐ Flame is "stable" and does not "lift" off burner. If flame lifts off burner, turn unit off and check that all vent pipes are "twist
locked" and leak proof, the vent cap is "right side up”. Do not proceed with operation if flame is "lifting off" burner.
☐ DO NOT proceed with operation unless burner cycles "on/off" without delays and the flame is "stable" and not "lifting" off
burner after 5 minutes of initial ignition.
Caution: If ignition system goes into lockout mode , be sure to wait a minimum of five minutes before
relighting.
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4.14 AIR SHUTTER CONTROL AND FLAME APPEARANCE
During initial installation, the air shutter opening should be checked to be certain that the shutter is set correctly at 1/8" open
for natural gas and 1/2" minimum open for L.P. gas. NOTE: For altitudes above 5,000’, some variations may be required.
Be sure burner and logs are properly installed. After log set has been properly installed, adjustments to the air shutter shall be
made for final flame appearance. These small shutter adjustments can be made by the following procedure:
NOTE: All adjustments to the air shutter setting mu st be made by a qualified installer, service agency, or the
gas supplier . Very small changes in shutter settings make major changes in flame appearance.
The burner air shutter adjustment cable is located on the right side of the fireplace. It is located under a slot in the bottom grill.
The shutter cable can be accessed through the slot and adjusted using the glass latch tool. To open or close the air shutter insert
the glass latch tool tip in the ring terminal’s ring hole. Push the cable to close the air shutter or pull on the cable to open the air
shutter.
1. If flame is too blue, close air shutter in small 1/8" increments until flame turns desired realistic yellow. Use glass latch
tool to hook end and slide control.
2. If flame is causing soot on viewing glass, open air shutter fully until sooting stops. Continue burning unit with air
shutter fully open for four to six hours until all internal deposited soot has burned off.
3. Once deposited soot has disappeared, close air shutter in increments of 1/8”.
LPG Air shutter settings h int: A properly adjusted air shutter setting will yield burner flames that have an
approximate 2” high blue color base. If yellow colored flames are starting at burner level, air shutter is
closed too far and will create soot. If you observe that the flam e is yellow starting very close to or at the
burner surface level, open air shutter. Also, if a log or part of a log is suspended and hanging inside a yellow
portion of the flame, soot can form easily on the part of the log that is inside the yellow flame area.
IMPORTANT: Try each new shutter setting approx. ½ hr. before mak ing additional changes.
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HOMEOWNER INFORMATION
Welcome to Mendota. We are proud to be the makers of world-class direct vent fireplaces and Fireplaces. We understand that
a fireplace is a long-term investment, and we are happy you have chosen us to be a part of your family. We are committed to
quality and satisfaction for all Mendota owners. Thank you for choosing a Mendota to be a source of c omfort and beauty in
your home.
We have designed this manual to help you enjoy all that your Mendota Fireplace has to offer. You will find tips, operating
instructions, and frequently asked questions to support the features and functions of your Fireplace.
We want you to enjoy your Mendota for years to come. If you have any additional questions regarding operation of your
Fireplace, please contact your Mendota local dealer.
5.1 AESTHETIC CONSIDERATIONS
Burning or static fireplaces are a major aesthetic focus in any room. In addition to offering the most realistic log details,
textures, coloration and the most realistic wood fire options, Mendota also offers a large array of internal firebox lining o ptions
and external decorative options. Visit www.mendotahearth.com and your local Mendota dealer’s show room to view all options
available.
5.2 HEATING PERFORMANCE
Air movement options for maximizing heat circulation that can be considered are operating the Fireplace’s convection blowers,
continuous operation of central heating furnace blowers or room ceiling fans. The heat output of the fireplace can be reduced
by reducing flame height using the remote control. Blowers can be turned down or turned off to reduce heat distribut ion.
Mendota also offers optional kits to move the heat from the fireplace to a different room or outside.
5.3 IMPORTANT INFORMATION FOR HOMEOWNER
Before you begin operation of your Gas Fireplace Heater, read and familiarize yourself with information provided in the
following chapters of this manual:
Chapter 3.2.6 Normal Surface Temperatures
Chapter 3.1.1 Mendota Fireplace Curing Instructions
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5.4 OPERATING INFORMATION
Using Your Remote Control
Your Mendota remote control is pre-programmed to your fireplace. Ensure you have installed 3 AAA batteries into your remote.
Press the top button on the remote control. If you do not hear a beep when you press this button, fol low the instructions below
to synchronize your fireplace and remote control.
Synchronizing the Fireplace and Remote Control
Master Switch ” The master switch acts as the main safety on/off control for the main gas burners only.
When the master switch is in the off -condition, the main gas burners will not turn on. However, all other
fireplace functions, including the standing pilot mode, will operate. When the master switch is in the on -
condition, the main burners will function as designed.
In case of an emer gency, toggle the master switch to off to turn off the main burners.
To synchronize the fireplace and remote control, follow the steps below:
1. Toggle the master switch to “ON”. Switch is in the ON position when pointing to the left, as shown in the diagram below.
2. Locate sync switch (see diagram below). Press the sync button and release. The fireplace will beep three times indicating
that it is ready to synchronize with a remote control. (Note: If you do not hear any beeps when you press the sync button,
contact your Mendota dealer or installer for assistance.)
3. Within seven seconds, press the “on” button on the remote control. The fireplace will beep four times to indicate that the
remote control’s command is accepted and sets to the particular code of that controller. Your system is now initialized.
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Remote Control Functions
NOTE: You will hear an audible beep once every time a remote-control button is pressed, signaling that the command has been
received. If you do not hear the beep, press the button again .
Locate the four function buttons on the remote control:
1. On/Off Button: This button turns the fireplace on or off. When this button is pressed, and the system is off, the pilot will
ignite. After pilot ignition, the pilot will light the main burners. Refer to IPI and CPI Modes in this manual for pilot
ignition.
2. Thermostat Button: This button will allow the selection of three modes: Manual, Normal Thermostat, and Smart
Thermostat.
a. Manual (Off): In this mode, the fireplace can be turned on, regardless of the room temperature. The actual room
temperature has no effect in this mode. All other functions such as fan speed control, flame height control,
secondary burner on/off control and accent light intensity controls are manually controlled.
WARNING: Do n ot leave this appliance burning and unattended for long periods in the manual(of f) mode.
Leaving the appliance burning in manual (off) mode for long periods can lead to overheating of the living
space which can negatively affect plants, animals, infants an d vulnerable people.
Note: In Manual Mode, t he fireplace will automatically shut off after 12 hours of continuous use. In Normal
Thermostat and Smart Thermostat modes, if the fireplace does not receive a prompt from the remote -
control transmitter for 60 mi nutes, the fireplace will automatically shut off. This can occur if the remote
c ontrol is move d to another room or if the remote batteries are very weak.
b. Normal Thermostat (On): In this mode, the fireplace will turn
itself on and off, depending on the temperature you set.
When you set the fireplace thermostat, the fireplace will stay
functioning until the room temperature increases 1 oF above
the set thermostat temperature. To increase the thermostat
temperature, press the up button until the desired
temperature is displayed in the thermostat temperature window. The fan will turn on five minutes after fireplace
startup and will turn off 12-1/2 minutes after the flames turn off, in this mode. The flame height can be adjusted
while the fireplace is functioning, fan speed can be adjusted after five minutes of startup. Rear burner can be turned
on or off at any time after startup. The accent light can be adjusted any time after startup.
c. Smart Thermostat (Smart): In this mode, room temperature is maintained and flame height adjusts automatically to
provide continual, efficient heat. All other functions of the normal thermostat mode, except the flame height
adjustment, are allowed. Manual flame height adjustment is not allowed in this mode. The Smart Thermostat
function adjusts the flame height in accordance to the difference between the set poin t temperature and the actual
room temperature. As the room temperature gets closer to the set point temperature, the Smart Thermostat
automatically modulates the flame down.
3. Up/Down Button: This button is used to increase or decrease the thermostat temperature, flame height, fan speed, and
accent light intensity.
4. Mode Selection Button: This button is used to toggle between the various function icons: flame height, fan speed,
accent light.
Figure 5-1 Display Modes
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5.5 REMOTE CONTROL OPERATING INSTRUCTIONS
To Turn on the Fireplace
NOTE: If the fireplace does not respond to the remote -control commands, the fireplace system may have entered “safety
lockout” mode. To reset the system, see Chapter 5.9.12 Why won’t my fireplace turn on?
1. Press the on/off button. The remote-control display will show all active icons on the screen and the fireplace will emit an
audible beep.
2. Select the thermostat mode by pressing the thermostat button: OFF (meaning Manual), ON (meaning Normal
Thermostat) or Smart (meaning Smart Thermostat).
a. If the thermostat icon displays as “OFF” (Manual), the fireplace will ignite and start on Hi.
b. If the thermostat icon displays as “ON” (Normal Thermostat), the fireplace will only ignite if the thermostat
temperature is greater than the room temperature.
c. If the thermostat icon displays as “SMART” (Smart Thermostat), the fireplace will only ignite if the
thermostat temperature is greater than the room temperature.
To Turn off the Fireplace
Press the on/off button. The fireplace will turn off.
Understanding Your Remote-Control Icons
Your remote control displays and controls the following functions. See below for detailed control explanations.
Note: the “AUX On” and “Rear Burner” functions are not used in this fireplace.
Figure 5-2 Remote Control Icons
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Icon Details
Mode Button: Pressing the mode button toggles between the various available functions: flame height, fan speed,
accent light intensity.
Flame Height: Six flame height levels are available. While the flame height icon
is displayed, pressing the up or down button once will increase or decrease the
flame height by one of six increments.
If the flame height is at Level one and the down button is pressed, all burners
will turn off.
If in IPI mode, the pilot will also extinguish.
If in CPI mode, the pilot will remain on.
Note: If in Smart Thermostat, the flame height function is not available for manual
adjustment. In Smart Thermostat, the flame height regulates automatically.
Fan Speed Control: The fan speed can be adjusted through six speeds and off.
To activate this function, press the Mode button until it displays the fan icon. Use
the up/down arrow button to turn on, off, or adjust the fan speed. Once you set
the desired fan control, the system will remember your selected fan speed until
you manually change it.
Accent Light: This function controls the accent light functions. Pressing the
UP button in this mode will turn on the accent light and allow you to control
the 6 levels of intensity. Once you set the desired light intensity, the system
will remember your selection until you manually change it.
5.6 HOW DO I CHANGE FROM CELSIUS TO FAHRENHEIT?
To change between °C to °F, follow these steps:
1. Press the ON/OFF button and turn off the fireplace.
2. Simultaneously, press both the mode button and the thermostat button.
3. Look at the LCD display to verify that your desired indicator (°F or °C) is being displayed.
If not, repeat Step 2.
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5.7 IPI AND CPI MODES
Intermittent Pilot and Continuous (Standing) Pilot Features
This gas fireplace is equipped with an electronic ignition system that first lights a pilot then uses the pilot to ignite the main
burners. The pilot can be set in the CPI (Continuous Pilot Ignition) mode to allow the pilot to remain on indefinitely by setting
the remote control to CPI mode. If the remote control is set to the IPI (Intermittent Pilot Ignition) mode, the pilot will only light
and remain ON while the main fireplace burners are operating.
IPI Mode: This mode turns the pilot off when the fireplace is not functioning and only lights the pilot automatically when a call
for heat is made by the remote control.
CPI Mode: If set to CPI mode, the pilot will ignite and remain on always.
Setting to IPI or CPI mode
With the remote control OFF, press the MODE button. You will see either “CPI” or “IPI”
displayed on the screen. Press the Up-arrow button to set “CPI” mode and press the
DOWN arrow button to set “IPI” mode. Once set to the desired setting, press ON/OFF
button to activate the fireplace.
Note: The snowflake icon will be visible on the display at all times when in CPI mode.
Recommended: Mendota recommends that CPI mode is used during the winter months
when the average daily high temperature falls below 50°F. This will keep the fireplace
chimney heated for proper updraft during burner ignition, and it will also eliminate excessive condensation of exhaust vapors
on the door glass. Leaving the fireplace in CPI mode will keep the fireplace body warm and eliminate cold drafts and heat loss to
the cold air that is trapped inside the firebox.
5.8 FIRST TIME LIGHTING INSTRUCTIONS
Safety Information
• This fireplace is equipped with an ignition device which automatically lights the pilot. Do not attempt to light pilot by hand.
• Before operating, smell all around fireplace area for gas. Be sure to smell next to the floor because some gas is heavier than air
and will settle on the floor.
• Toggle Master Switch to ON. Remote control will not communicate to receiver unless the Master Switch is ON.
• Use only the supplied remote control to light the pilot. This valve will not operate if the pilot is not lit and stable.
• Do not use this fireplace if any part has been underwater. Immediately call a qualified service technician to inspect and replace
any component which has been under water. Attempted operation may result in fire or explosion resulting in property damage,
personal injury, and loss of life.
Warning: If you do not
follow these i nstructions
exactly, a fire or
explosion may result
causing property
damage, pe rsonal injury,
and loss of life.
WHAT TO DO IF YOU SMELL GAS
Do not light any appliance.
Do not touch any light switch
Do not use any phone in your building.
Call your gas supp lier from a neighbor's phone.
Follow the provider representative's instructio ns.
If you cannot reach your gas supplier, call the fire
department for assistance.
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Operating Instructions
1. Read the above safety information carefully before proceeding.
2. Do not attempt to light the pilot by hand; the door must remain on this unit during pilot ignition.
3. Press the ON/OFF button on remote control to begin the ignition sequence.
The fireplace will emit an audible beep then the igniter will begin to spark. After the pilot lights and is established, the valve will
automatically open and the burner will light. The burner will initially light to full flame. Adjust it to an appealing setting with the
remote. See Remote Operating Instructions in Operating Instructions Manual.
Warning: If the pilot fails to light, the system will “lockout”. Press ON/OFF button on remote control to Turn Off the system
and reset the “lockout”. Allow five minutes for any gas in the unit to dissipate before attempting to re-light the pilot.
4. Press ON/OFF button on remote control again to start ignition sequence.
5. If the fireplace will not operate, follow the in structions “To Turn off Gas to Fireplace” below and call your service technician or
gas supplier.
To Turn Off Gas to Fireplace
1. Press the ON/OFF button on the remote control.
2. Turn off CPI Pilot Mode from remote control.
3. Turn OFF the external manual shutoff valve if was required and supplied by installer and mounted adjacent to fireplace.
4. Turn OFF the internal manual shutoff valve located in the fireplace under the front right access pa nel.
5. Turn OFF all electric power to the fireplace if service is to be performed.
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5.9 FREQUENTLY ASKED QUESTIONS
What to do if I smell gas?
If you smell gas:
➢ Do not light any appliance.
➢ Do not touch any light switches.
➢ Do not use any phone in your building.
➢ Call your gas supplier from a neighbor's phone.
➢ Follow the provider representative's instructions.
➢ If you cannot reach your gas supplier, call the fire department for assistance.
Where can I find the model and serial numbers?
When requesting service, you will be asked to provide the model number and serial number to your Mendota dealer. This
information will expedite the warranty verification process. The Listing Label contains the model number and serial number for
your particular appliance.
This is an example of your listing label:
Listing label location: The listing label is
in the fireplace under the firebox. To
access the listing label, remove the
center access grill on the fireplace. The
label is chained to the fireplace under
this grill.
Figure 5-3 Listing Label
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Can I use my Fireplace during power outages?
This electronic ignition system uses the supplied 110VAC power when it is available for all functions of this system. If
you experience a power outage, plug in the battery pack (6V DC maximum, supplied with this fireplace) to the fireplace
backup power inlet port.
During the power outage, the fireplace’s burner will function as well as the flame height adjustment. The fan and accent
light, which are dependent on 110VAC power, will not function.
Your installer should demonstrate the backup DC power pack during power outages. Be sure to retain the DC battery pack and
the connecting harness in a safe and secure place for use during power outages.
Figure 5-4 Backup DC Power Connection
What maintenance is required?
Required Annual Maintenance
The following procedures must be performed each year by a qualified installer, service agency or the gas supplier.
Note: Any adjustments to burner, pilot or logs must be done by a qualified installer, service agency or the gas supplier.
Recommended steps for yearly maintenance:
1. Clean all lint and dust build-up around the control. Inspect the condition of any wiring under the burner for melting or
damage.
2. Clean pilot light flame sensor rod and sparker rod using emery cloth. Vacuum clean pilot light assembly.
3. Visual check of pilot flames is required. Pilot flame must overlap flame sensor and burner ignition ports always. Especially
for LP gas applications, always verify visible pilot flame length is at least 1" long.
4. Visual check of main burner’s flames is required.
5. Remove logs and coals and clean away any foreign matter (lint, carbon, etc.) on the burner and logs.
6. Clean under side of the logs for any carbon deposits. Note: Logs should be visually checked for carbon buildup. If carbon
deposits are visible on logs, unit should be turned off and a qualified installer, service agency, or the gas supplier
contacted. Be sure logs are re-installed per instructions.
7. Check condition of glass door gasket, gasket must seal tightly over firebox. Inspect gasket along top and sides of glass. If
gasket bulb along top edge or side top areas are discolored to a white color appearance (through the whole thickness of
the gasket bulb in a 3” to 12” long area) and the gasket adhesive in no longer functional to stick to glass, then replace the
gasket.
8. Visually inspect the vent terminal (vent cap) for leaves, twigs and other debris accumulation. Clean if required.
9. Clean door glass.
10. Clean enamel firebox lining, if one is installed.
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Periodic Inspection
Follow these steps for periodic inspections:
1. Check to verify that the vent system and vent cap are open and free of blockage.
2. Before re-installing glass, have qualified service person check the operation of the pilot and cycle the burner per lighting
instructions. Be sure all items in lighting and installation checklists are completed.
3. Periodic visual check of pilot flames is required. Pilot flame must overlap flame sensor and burner ignition ports always.
Especially for LP gas applications, always verify visible pilot flame length is at least 1" long.
4. Periodic visual check of main burner’s rear and front flames is required.
How do I clean the viewing glass?
The viewing glass should be cleaned periodically. Exterior glass surface may be cleaned with cleaner as desired. To clean interior
glass surface, use Kel Kem Polish Plus (part # 65-06-00455) or a comparable product. Caution: Do not use oven cleaner to clean
glass. Clean the glass only when it has cooled to room temperature.
Additives that are put in gas (both natural and propane) to make it smell can be harmful to glass and can
leave a white film deposit on the glass. This deposit can be rem oved , if cleaned in a timely manner, with
cleaners such as KEL KEM “Polish Plus” (part # 65 -06-00455) or comp arable product (contact your dealer).
Is my flame performance correct?
Your fireplace has air shutters, dampers, coals, and embers that can be adjusted depending on your fuel and venting
configuration. These adjustments should be made by a qualified technician to achieve the best flame performance. Contact your
installer or Mendota dealer if you feel your fireplace is not burning correctly. Improper setup and adjustment is not covered
under warranty.
What should I do if my fireplace is sooting?
Sooting is caused by improper installation or air shutter operation. However, some small areas of soot deposits on log surfaces
are deemed acceptable. If you observe large soot areas (larger than 1”x1”) on log surfaces or signs of sooting on the door glass
(usually a thin black film on the Fireplace viewing glass or on the outside of th e home around the vent cap), the unit must be
immediately turned off and the local Mendota dealer promptly informed. Mendota dealers will correct "sooting" problems, but
Mendota and their dealers are not responsible for damage caused by excessive sooting t hat has not been immediately brought
to their attention. Troubleshooting soot:
Issue:
Thin black
coating (soot)
forms on
viewing glass.
Possible Causes:
A. Burner Air Shutter closed too
much.
B. Exhaust Damper is closed too
much.
C. Improper log and/or ember
placement
D. Glass door seal is
compromised.
E. Incorrect gas pressure or
burner orifice size.
Corrective Action:
Open air shutter on burner fully. Check exhaust damper position.
It may be closed too far. Open exhaust damper. Check glass gasket
for proper seal. Corners of glass gaskets cannot be bulging out. If
glass gasket along top edge in the middle is white in color across
entire thickness of gasket bulb and gasket adhesive is not
functional, replace glass gasket. If sooting continues, shut off unit
and call Mendota service person. Have service person check for
proper Orifice Sizes and correct gas outlet pressure (3.5" W.C. Nat.
Gas; 10" W.C. LP Gas).
NOTE: To clean glass - remove glass and wipe glass with cloth or
paper towel.
How do I change from Celsius to Fahrenheit?
To change between °C to °F, follow these steps:
1. Press the ON/OFF button and turn off the fireplace.
2. Simultaneously, press both the mode button and the thermostat button .
3. Look at the LCD display to verify that your desired indicator (°F or °C) is being displayed.
If not, repeat Step 2.
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When do I change batteries in my remote?
When the remote-control batteries are low, a battery icon will appear on the LCD display of
the remote control before all battery power is lost. When the batteries are replaced, this icon
will disappear.
How do I set the child-lock mode?
To prevent unsupervised children from operating the fireplace, a child-lock function is
provided with this remote-control system.
To activate the child-lock function: Simultaneously press the “MODE button” and the “UP
button”.
To deactivate the child-lock function: Simultaneously press the “MODE button” and the “UP
button”.
During the child-lock mode, none of the remote-control buttons will function. You must
deactivate the child-lock function before you can use the remote control.
Thermostat icon disappeared from my remote.
When reinstalling batteries, the thermostat button may have been pressed. To make your thermostat icon reappear, follow
these steps:
1. Remove one battery.
2. Press and hold the thermostat button on the remote.
3. Reinstall the battery while holding the thermostat button down.
4. If you see “set”, the thermostat button is now enabled.
5. If you see “clear”, the thermostat button is disabled.
6. Repeat this procedure if you did not see “set” or “clear” to add/remove the thermostat option.
Why won’t my fireplace turn on?
If your remote control is working, but your fireplace won’t turn on, your fireplace may be in “lockout” mode.
How to reset a lockout:
1. Turn off remote.
2. Turn on remote and wait two seconds.
3. Turn off remote and wait two seconds.
4. Turn on remote and wait two seconds.
5. Turn off remote.
This should clear the lockout mode. Turn on the remote and start the fireplace.
Ensure the master switch is in the run/on position.
After completing these steps, contact your Mendota dealer if fireplace won’t turn on.
What happens when I first light my fireplace?
When you first light your fireplace, the initial curing phase is initiated. During the initial curing phase, a small amount of smoke
and odor will be emitted. This is normal. To complete the curing process, run your fireplace, on high fire, for two hours with the
fans on level 3. Open doors and windows to dissipate any odor. Turn your fireplace off. After it has cooled, run it again , on high
fire, with the blowers off until no smoking or odor remains. Refer to Chapter 3.1.1 Mendota Fireplace Curing Instructions for
more information.
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MAINTENANCE INFORMATION
6.1 REQUIRED PERIODIC INSPECTIONS
1. Check to verify that the vent system and vent cap are open and free of blockage.
2. Have qualified service person check the operation of the pilot light. Pilot light must light within the first five to eight
seconds of ignitor sparks initiation. If it takes more ten seconds to ignite the pilot flame, check pilot spark rod position and
ignitor wires for pinched areas or damaged areas.
3. Pilot rectification time must be checked. Pilot flame should rectify the
ignition system within five seconds of pilot flame ignition and sparking at
pilot must stop with five seconds. If pilot flame ignites but sparking
continues at pilot hood after five seconds, it indicates that pilot flame
sensor is dirty. Clean pilot flame sensor using emery cloth and retry. If
problem persists, check flame sensor lead wire for damage or grounding
problems and correct.
4. Periodic visual check of pilot flames is required. Pilot Flame must overlap
Flame Sensor and burner ignition ports always. Especially for LPG
applications, always verify visible pilot flame length is at least 1" long,
minimum.
5. Cycle the burners to make certain burner ignition is prompt and flame
propagation along burner length is quick and smooth. If fla me
propagation is delayed, remove obstructing debris, vacuum burner ports
and retry.
6. Periodic visual check of rear and front burner flames pattern is required.
6.2 CLEANING VIEWING GLASS
WARNING: Do not clean when glass is hot.
The viewing glass should be cleaned periodically. Exterior glass surface may be cleaned with cleaner as desired. To clean
Interior glass surface, remove glass frame assembly. See 4.7 To Remove Door. Use Kel Kem “polish plus" (part # 65-06-
00455) or comparable product to clean glass interior surface. Do not use oven cleaner or abrasive cleaners to clean glass.
6.3 REQUIRED ANNUAL MAINTENANCE
In addition to the “Required Periodic Inspections”, the following procedures m ust be performed each year by
a qualified installer, ser vice agency or the gas supplier . Any adjustments to burner, pilot or logs must be
done by a qualified installer, service agency, or the gas supplier .
Clean all lint and dust build-up around the control and blowers. Inspect the condition of any wiring under the burner for melting
or damage. Clean flame sensor rod/hook using emery cloth. Vacuum all burner ports and pilot assembly.
Remove logs & coals and clean away any foreign matter (lint, Carbon, etc.) on the burner and logs. Be sure the burner ports are
"open". Clean the pilot and under side of the logs for any Carbon deposits.
NOTE: Logs should be visually checked for Carbon "build -up". If heavy carbon deposits are visible on logs,
unit should be turn ed off and a qualified installer, service agency, or t he gas supplier should be contacted .
Be sure logs are re -installed per instructions.
Check glass gasket seal. Visually inspect glass gasket, especially at the corners of the glass piece. Glass gasket is installed as a 4-
piece assembly. Check joints between the gasket pieces at the corners. They should butt against each other to create a seal. Gaps
between gasket pieces can cause exhaust leaks and lead to acrid smell concerns.
Figure 6-1 Minimum Pilot Flame Length
1" MIN.
1" MIN.
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6.4 OVER FIRING OR UNDER FIRING OF BURNER
NEVER "over fire" or “under-fire” units by increasing or decreasing the main orifice sizes or by adjusting gas pressure to increase
BTUH above nameplate specifications.
Over firing can cause permanent damage to firebox and deterioration of parts and void the warranty.
Under-firing can potentially cause delayed ignition and lead to property loss and person injury and will void the warranty.
If you are using a “backyard” Natural Gas well as the gas source, you must submit formal gas analysis data
s heets to Mendota Fireplaces f or review and calculation of proper main burner orifice sizes prior to first
fir i ng. It is known that unpurified Natural Gas from “backyard” wells can contain high energy levels causing
over firing. Further, unpurified gas can contain high levels of Sulphur and other compounds which can
damage the burner materials and the ceramic glass. Use of unpurified gas will void the warranty for this
product.
6.5 BURNER FLAME HEIGHTS REFERENCE DIAGRAM
Figure 6-2 Burner Flame Heights: This image provides a visual reference for the burner flames
burning at maximum height after the burners have been operating for 30 minutes or longer.
This, however, is dependent on the gas type, air shutter opening setting and vent system
configuration. Actual flame heights can be slightly higher or lower when compared to this
reference image.
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6.6 REPLACEMENT PARTS INFORMATION
How to Access Components
Before accessing any components in the fireplace always first shut off power and gas to the fireplace.
This fireplace has been designed to make accessing the components as easy as possible. Most of the components including the
valve and control board can be accessed and replaced without having to remove anything from insi de the firebox.
The descriptions below show where the main fireplaces components are located and how to access them for service. The
descriptions show how to access the components after the fireplace has been installed. All components are also accessible f rom
the outside of the unit before the fireplace is installed.
Pilot: The pilot is in the center of the firebox at the rear. If the pilot must be replaced. Remove the floorplate, burner and right -
side access grill from the fireplace. Remove the heat shield that is covering the valve under the access panel, this will give access
to the valve and control board so that the pilot can be disconnected. The pilot can then be disconnected from the pilot brack et
and removed from the fireplace.
Burner: To remove the burner first remove the 4 screws holding the feet of the burner to the floor plate. Then rotate the burner
so that the feet clear the air box. Then slide the burner to the left to remove the burner tube from the shutter box. Detaile d
instructions for removing the burner can be found in the converting to LPG section of this manual.
Gas Valve: The main gas valve is located on the right side of the fireplace. To access the valve, remove the right -side access panel
and heat shield from the fireplace. The valve is mounted on a bracket that is Velcroed to the floor. Simply pull up on the bracket
to free the valve and pull it out of the fireplace. It is a good idea to first disconnect the wires connected to the valve, s o they
aren’t damaged when removing the valve. The gas lines will have enough slack to allow you to pull the valve out of the fireplace
without disconnecting them first.
Control Board: The control board is mounted on the right side of the fireplace. To access the control board, rem ove the right-
side access panel and heat shield from the fireplace. The board is Velcroed to the floor simply pull up on the board to remov e it
from the fireplace.
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Convection Blowers: The convection blowers are mounted at the rear of the fireplace. To remove the blowers first remove the
floorplate and burner from the firebox. Then unscrew the pilot bracket and air shutter components from the air box. Then
unscrew the airbox and lift it out of the fireplace. Next remove the explosion plate panels. The blowers are located under these
panels towards the rear of the fireplace. The blower assemblies are attached to the floor with two nuts. Remove the nuts and lift
the blower assemblies out of the fireplace.
Accent Light: The accent lights are mounted in the firebox top. The lens and retaining bracket is held on with 4 nuts.
Convection Air Blower System Parts
Figure 6-3 ML39 BLOWER ASSEMBLIES
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Accent Light Parts
Figure 6-4 ML39 Light Assembly Parts
Gas Train Assembly Parts
HA-77-00357
HA-88-00168
HA-58-04606
10-11-00020
10-11-00025
LIGHT COVER CLIP
LENS RETAINER BRACKET WITH GASKET
ACCENT LIGHT HOUSING
LIGHT BULB, G9 XENON, 25W
ACCENT LIGHT LENS-2016
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Glass Frame Parts Replacement Procedure
WARNING: do not use substitute materials. All replacement materials must be certified and obtained through
Mendota fireplaces.
TO REPLACE DAMAGED GLASS
1. Bend glass retainer tabs up 90 degrees. Four tabs hold down the glass and gasket assembly.
2. Remove the damaged glass and gasket material. Clean the inner surface of the glass frame.
3. Assemble new gasket on glass edge starting with the bottom left corner. The adhesive on the gasket should contact the
glass surface. Use tracer lines in gasket to determine where the glass should sit on the gasket surface.
4. Place glass and gasket assembly in glass frame and carefully bend down glass retainer tabs. Extra glass retainer tabs are
provided should any originally used tabs break off.
The glass frame assembly and its individual components are available through Johnson Gas Appliance Company. Contact your
dealer for more detailed ordering information.
GLASS FRAME ASSEMBLY REPLACEMENT PARTS LIST
ITEM PART NUMBER DESCRIPTION
1 HA-96-00053 GLASS FRAME, WELDMENT, ML39
2 65-02-00103 GASKET, TADPOLE, 5 /8” BULB, 3/4” TAIL
3 65-06-01367 GLASS, CERAMIC, ML39
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WARRANTY QUALIFICATION AND SERVICE
The following information verifies proper installation and operation of your Mendota Fireplace. All installation and operating
instructions must be carefully followed. This Mendota Fireplace must be installed and serviced by a qualified installer, service
agency, or the gas supplier.
7.1 INSTALLER VERIFICATION CHECKLIST
Installer Verification Checklist
Mechanical:
❑ Install approved vent pipes and vent cap per manual
❑ Vent Length conforms to minimum and maximum vertical and horizontal vent run requirements
❑ Vent damper position must be adjusted per vent length, as recommended.
❑ Check for proper clearances to combustibles and vent locations per manual
❑ Install proper size gas lines; check for gas leaks per manual
Plumbing:
❑ Check for correct gas pressure at manifold per manual
❑ Manifold pressure to be 3.5” Inches Water Column maximum - Nat. Gas (plus or minus 1/8”)
❑ Manifold pressure to be 10” Inches Water Column maximum - L.P. Gas (plus or minus 1/8”)
❑ Check cycle burners on/off for prompt ignition per lighting instructions
❑ Burners must light immediately
❑ Flames must travel promptly along entire length of burner
Setup:
❑ Install logs and adjust flame per manual
❑ Light Pilot
❑ Operate Burner
❑ Proper pilot flame impingement on burner
❑ Burner air shutter opening: 1/16”-1/8" Nat. Gas and 1/4“-fully open LP
❑ Check that flame is "stable" and is not "lifting" off burner after draft has been established (approx. five minutes)
❑ Adjust exhaust damper for ultimate flame appearance after 25 minutes of startup
Homeowner Training:
❑ Train owner on remote control functions
❑ Explain thermostatic functions
❑ Brief and Instruct owner on periodic maintenance requirements of unit
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7.2 WARRANTY POLICY STATEMENT
Mendota Fireplace, a division of Johnson Gas Appliance Company, extends this Limited Lifetime Warranty to the original
purchaser of this appliance provided the product remains in the original place of installation. The items covered by this li mited
warranty and the period of such coverage is set forth in the table below.
Some conditions apply (see below).
The policy is not transferable, amendable or negotiable under any circumstances.
Indoor Gas Products Warranty Coverage
Part Lifetime 2 years 1 year 90 days Labor Coverage
(Years)
Firebox and Heat Exchanger 5
Glass- thermal breakage only 2
Stainless steel burner tubes/
Ceramic Burners 2
All Castings 2
Valve assembly and all gas
control components (Pilot
assembly, Flame Sensor, Spark
Electrode, Pilot Tubing, Orifices,
Thermocouple, Thermopile)
2
All other Electrical components
(Ignition Control Boards, Wiring,
Switches, Blowers, Blower
Control Module, Battery Pack
2
Remote Control Systems 1
Venting / Venting Components 1
Exterior Painted Finishes 1
Exterior Plated Finishes 1
Brick Panels & Log Sets -
Coloration failures only 1
Enamel Panels 1
All Firebox Media (Glass Beads,
ceramic stones, tumbled marble) 1
All hardware 1
Mesh/Glass Safety Barriers 1
Accent Light Bulbs 0
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Conditions
Warranty protects against defect in manufacture or Mendota factory assembled components only, unless herein specified
otherwise.
It remains the full responsibility of the owner to operate this appliance within the guidelines provided in th e Installation and
Operating Instructions Manual accompanying this appliance. Further, the owner shall bear full responsibility to enforce
clearances to combustibles requirements and cautioning others about hot glass surface and hot metal surfaces.
Owner by operating this appliance accepts that this is a heat producing appliance which has glass and steel parts that are hot
enough to cause severe burns. Owner accepts that this appliance requires close monitoring of children and vulnerable
individuals who are in the vicinity of this appliance when it is in operation. Mendota does not assume or accept any liability
claims for burns or other physical or material damages resulting from touching hot glass surface and hot metal surfaces that
are part of this appliance or other adjacent object such as hearth pads and mantels that may heat up during operation of
this appliance.
Any part(s) found to be defective during the warranty period as outlined above will be repaired or replaced at Mendota’s opti on
through an accredited distributor, dealer or pre-approved and assigned agent provided that the defective part is returned
to the distributor, dealer or agent for inspection if requested by Mendota. Alternatively, Mendota may at its own discretion
fully discharge all of its obligations under the warranty by refunding the verified purchase price of the product to the
original purchaser. The purchase price must be confirmed by the original Bill of Sale.
The authorized selling dealer, or an alternative authorized Mendota dealer if pre-approved by Mendota, is responsible for all in-
field diagnosis and service work related to all warranty claims. Mendota is not responsible for results or costs of
workmanship of unauthorized Mendota dealers or agents in the negligence of their service work.
At all times Mendota reserves the right to inspect reported complaints on location in the field claimed to be defective prior to
processing or authorizing of any claim. Failure to allow this upon request will void the warranty.
All warranty claims must be submitted by the dealer servicing the claim, including a copy of the Bill of Sale (proof of purchase by
you). All claims must be complete and provide full details as requested by Mendota to receive consideration for evaluation.
Incomplete claims may be rejected.
Unit must be installed according to all manufacturers’ instructions as per the manual by a Mendota authorized dealer, an
authorized dealer technician or an authorized service person only.
All Local and National required codes must be met.
The installer is responsible to ensure the unit is operating as designed at the time of installation.
The original purchaser is responsible for annual maintenance of the unit, as outlined in the owner’s manual. As outlined bel ow,
the warranty may be voided due to problems caused by lack of maintenance.
Repair/replacement parts purchased by the consumer from Mendota after the original coverage has expired on the unit will
carry a 90-day warranty, valid with a receipt only. Any item shown to be defective will be repaired or replaced at our
discretion. No labor coverage is included with these parts
Exclusions
1. This Limited Lifetime Warranty does not extend to paint, rust or corrosion of any kind due to a lack of maintenance or
improper venting, combustion air provision, corrosive chemicals (i.e. chlorine, salt, air, etc.), door or glass gasketing.
2. Discoloration and some minor warping are normal, not a defect and therefore not covered under this warranty. The
installer must insure the unit is burning as per the rating tag at the time of installation. Over-firing (operation above the
listed BTU rating of this unit can cause serious damage and will nullify this warranty.
3. Mendota will not cover the cost of the removal or re-installation of hearths, facing, mantels or other components.
4. This warranty does not cover dealer travel costs for diagnostic or service work. All labor rates paid to authorized dealers
are subsidized, pre-determined rates. Dealers may charge homeowner for travel and additional t ime beyond their subsidy.
5. Damages to plated surfaces caused by fingerprints, scratches, melted item or other external sources left on plated surfaces
from the use of cleaners other than denatured alcohol is not covered by this warranty.
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6. Mendota is free of liability for any damages caused by the appliance, as well as inconvenience expenses and materials.
Incidental or consequential damages are not covered by this warranty.
7. Exclusions to this warranty include: injury, loss of use, damage, failure to function due to accident, negligence, misuse,
improper installation, alteration of the manufacturer’s setting of components, lack of proper and regular maintenance,
damage incurred while the appliance is in transit, or by act of God.
8. Malfunction, damage or performance based issues of any and all components as a result of environmental conditions,
location, chemical damages, downdrafts, installation error, installation by an unqualified installer, incorrect chimney
components (including but not limited to cap size or type), operator error, abuse, misuse, use of improper fuels, lack of
regular maintenance and upkeep, acts of God, weather related problems from hurricanes, tornados, earthquakes, floods,
lightning strikes/bolts or acts of terrorism or war, which result in malfunction of the appliance are not covered under the
terms of this Limited Lifetime Warranty.
9. Mendota has no obligation to enhance or modify any unit once manufactured (i.e. as products evolve, field modifications or
upgrades will not be performed on existing appliances).
10. Any unit showing signs of neglect or misuse will not be covered under the terms of this warranty policy and may void this
warranty. This includes units with rusted or corroded fireboxes which have not been reported as rusted or corroded within
three (3) months of installation/purchase.
11. Units which show evidence of being operated while damaged, or with problems known to the purchaser and causing
further damages will void this warranty.
12. Units where the serial no. has been altered, deleted, removed or made illegible will void this warranty.
13. Noises due to minor movement, expansion and contraction of the steel is normal and is not covered under the terms of this
warranty.
Freight damages for products or parts are not covered under the terms of the warranty.
Products made or provided by other manufacturers and used in conjunction with the Mendota appliance without prior
authorization from Mendota may void this warranty.
Limitations of Liability
The original purchaser’s exclusive remedy under this warranty, and Mendota’s sole obligation under this warranty, express
or implied, in contract or in tort, shall be limited to replacement, repair, or refund, as outlined above. In no event will
Mendota be liable under this warranty for any incidental or consequential commercial damages or damages to property.
To the extent permitted by applicable law, Mendota makes no express warranties other than the warranty specified herein.
The duration of any implied warranty is limited to duration of the e xpressed warranty specified above. If implied
warranties cannot be disclaimed, then such warranties are limited in duration to the duration of this warranty.
Some U.S. states do not allow limitations on how long an implied warranty lasts or allow exclusion or limitation of incidental
or consequential damages, so the above limitations or exclusions may not apply to you.
Customers located outside the U.S. should consult their local, provincial or national legal codes for additional terms which
may be applicable to this warranty.
How to Obtain Warranty Service
1. If you discover a problem that you believe to be covered by the warranty, you must report to your Mendota Dealer within
30 days, with proof of purchase, purchase date, model name and serial number.
2. Customers should contact the authorized selling dealer to obtain warranty service. In the event the authorized selling
dealer is unable to provide warranty service, please contact Mendota by mail at the address listed below. Please include a
brief description of the problem and your address, email and telephone contact information. A representative will contact
you to make arrangements for an inspection and/or warranty service.
Warrantor:
Johnson Gas Appliance Company
Mendota Fireplace Division
520 E Avenue NW, Cedar Rapids, IA 52405, USA
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Owner Registration
After installation, Mendota fireplace owners must register with Mendota to qualify for the Lifetime Limited Warranty within 3 0 days.
Product registration will activate your Lifetime Limited Warranty.
Owners should complete the forms available at:
http://mendotahearth.com/gas-fireplace-and-stove-registration.php
Note: Your Mendota dealer can assist with warranty applications and infor mation.
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Thank you for choosing Mendota.
02/01/2019
Johnson Gas Appliance Company
520 E Avenue NW
Cedar Rapids, Iowa 52405
Mendota Warranty Registration
02/01/2019