HomeMy WebLinkAboutFile Documents.205 E Durant Ave.0127-2023-BRES (5)CEILING CASSETTE TYPE AIR CONDITIONERS
MLZ-KP25VF MLZ-KP35VF MLZ-KP50VF
REFRIGERANT
R32/R410A
EnglishINSTALLATION MANUAL For INSTALLER
• This manual only describes the installation of indoor unit. When installing the
outdoor unit, refer to the installation manual of outdoor unit.
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1. BEFORE INSTALLATION
MEANINGS OF SYMBOLS DISPLAYED ON INDOOR UNIT AND/OR OUTDOOR UNIT
WARNING
(Risk of fire)
This unit uses a flammable refrigerant.
If refrigerant leaks and comes in contact with fire or heating part, it will create harmful gas and there is risk of fire.
Read the OPERATING INSTRUCTIONS carefully before operation.
Service personnel are required to carefully read the OPERATING INSTRUCTIONS and INSTALLATION MANUAL before operation.
Further information is available in the OPERATING INSTRUCTIONS, INSTALLATION MANUAL, and the like.
1-1. THE FOLLOWING SHOULD ALWAYS BE OBSERVED FOR SAFETY
• Be sure to read “THE FOLLOWING SHOULD ALWAYS BE OBSERVED FOR SAFETY” before installing the air conditioner.
• Be sure to observe the warnings and cautions specified here as they include important items related to safety.
• After reading this manual, be sure to keep it together with the OPERATING INSTRUCTIONS for future reference.
Required Tools for Installation
■ Do not install the unit by yourself (user).
Incomplete installation could cause fire or electric
shock, injury due to the unit falling, or leakage of
water. Consult the dealer from whom you purchased
the unit or a qualified installer.
■ Perform the installation securely referring to
the installation manual.
Incomplete installation could cause fire or electric
shock, injury due to the unit falling, or leakage of
water.
■ When installing the unit, use appropriate pro-
tective equipment and tools for safety.
Failure to do so could cause injury.
■ Install the unit securely in a place which can
bear the weight of the unit.
If the installation location cannot bear the weight of
the unit, the unit could fall causing injury.
■ Electrical work should be performed by a
qualified, experienced electrician, according
to the installation manual. Be sure to use an
exclusive circuit. Do not connect other electri-
cal appliances to the circuit.
If the capacity of the power circuit is insufficient or
there is incomplete electrical work, it could result in
a fire or an electric shock.
■ Earth the unit correctly.
Do not connect the earth to a gas pipe, water pipe,
lightning rod or telephone earth. Defective earthing
could cause electric shock.
■ Do not damage the wires by applying excessive
pressure with parts or screws.
Damaged wires could cause fire or electric shock.
■ Be sure to cut off the main power in case of
setting up the indoor P.C. board or wiring
works.
Failure to do so could cause electric shock.
■ Use the specified wires to connect the indoor
and outdoor units securely and attach the
wires firmly to the terminal block connecting
sections so the stress of the wires is not ap-
plied to the sections. Do not extend the wires,
or use intermediate connection.
Incomplete connecting and securing could cause
fire.
■ Do not install the unit in a place where inflam-
mable gas may leak.
If gas leaks and accumulates in the area around the
unit, it could cause an explosion.
■ Do not use intermediate connection of the power
cord or the extension cord and do not connect
many devices to one AC outlet.
It could cause a fire or an electric shock due to
defective contact, defective insulation, exceeding
the permissible current, etc.
■ Be sure to use the parts provided or specified
parts for the installation work.
The use of defective parts could cause an injury or
leakage of water due to a fire, an electric shock, the
unit falling, etc.
■ When plugging the power supply plug into the
outlet, make sure that there is no dust, clog-
ging, or loose parts in both the outlet and the
plug. Make sure that the power supply plug is
pushed completely into the outlet.
If there is dust, clogging, or loose parts on the power
supply plug or the outlet, it could cause electric shock
or fire. If loose parts are found on the power supply
plug, replace it.
■ Attach the electrical cover to the indoor unit
and the service panel to the outdoor unit
securely.
If the electrical cover of the indoor unit and/or the
service panel of the outdoor unit are not attached
securely, it could result in a fire or an electric shock
due to dust, water, etc.
■ When installing, relocating, or servicing the
unit, make sure that no substance other than
the specified refrigerant (R32/R410A) enters
the refrigerant circuit.
Any presence of foreign substance such as air can
cause abnormal pressure rise and may result in
explosion or injury. The use of any refrigerant other
than that specified for the system will cause mechani-
cal failure, system malfunction, or unit breakdown. In
the worst case, this could lead to a serious impedi-
ment to securing product safety.
■ Do not discharge the refrigerant into the atmos-
phere. If refrigerant leaks during installation, ven-
tilate the room. Check that the refrigerant does
not leak after installation has been completed.
If refrigerant leaks and comes in contact with fire or
heating part of such a fan heater, kerosene heater,
or cooking stove, it will create harmful gas.
■ Use appropriate tools and piping materials for
installation.
The pressure of R32/R410A is 1.6 times more than
R22. Not using appropriate tools or materials and
incomplete installation could cause the pipes to burst
or injury.
■ When pumping down the refrigerant, stop the
compressor before disconnecting the refriger-
ant pipes.
If the refrigerant pipes are disconnected while the
compressor is running and the stop valve is open, air
could be drawn in and the pressure in the refrigera-
tion cycle could become abnormally high. This could
cause the pipes to burst or injury.
■ When installing the unit, securely connect the
refrigerant pipes before starting the compres-
sor.
If the compressor is started before the refrigerant
pipes are connected and when the stop valve is
open, air could be drawn in and the pressure in the
refrigeration cycle could become abnormally high.
This could cause the pipes to burst or injury.
■ Fasten a flare nut with a torque wrench as
specified in this manual.
If fastened too tight, a flare nut may break after a
long period and cause refrigerant leakage.
■ The unit shall be installed in accordance with
national wiring regulations.
■ When using a gas burner or other flame-pro-
ducing equipment, completely remove all of the
refrigerant from the air conditioner and ensure
that the area is well-ventilated.
If the refrigerant leaks and comes in contact in fire
or heating part, it will create harmful gas and there
is risk of fire.
■ Do not use means to accelerate the defrosting
process or to clean, other than those recom-
mended by the manufacturer.
■ The appliance shall be stored in a room without
continuously operating ignition sources (for ex-
ample: open flames, an operating gas appliance
or an operating electric heater).
■ Do not pierce or burn.
■ Be aware that refrigerants may not contain an
odour.
■ Pipe-work shall be protected from physical dam-
age.
■ The installation of pipe-work shall be kept to a
minimum.
■ Compliance with national gas regulations shall
be observed.
■ Keep any required ventilation openings clear of
obstruction.
■ Keep gas-burning appliances, electric heaters,
and other fire sources (ignition sources) away
from the location where installation, repair, and
other air conditioner work will be performed.
■ The appliance shall be stored in a well-ventilated
area where the room size corresponds to the
room area as specified for operation.
■ In Australia, only technicians that possess the
appropriate license issued by the Australian
Refrigeration Council (ARC) should install this
product.
WARNING (Could lead to death, serious injury, etc.)
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This installation manual describes only
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manual for outdoor unit set up.En
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CONTENTS
1. BEFORE INSTALLATION .....................1
2. INDOOR UNIT INSTALLATION ............43. FLARING WORK AND PIPE
CONNECTION .....................................7
4. TEST RUN............................................9
5. GRILLE (OPTION) INSTALLATION .....9
6. PUMPING DOWN ..............................10
7. CONNECTING AN INTERFACE (OPTION)
TO THE AIR CONDITIONER ..................10
Phillips screwdriver
Level
Scale
Utility knife or scissors
75 mm hole saw
Torque wrench
Wrench (or spanner)
Appropriate personal protective equipment
The installer should ensure they check the respective
Work Health and Safety (WHS) Act within their jurisdic-
tion as the requirements and obligations may differ.
Flare tool for R32, R410A
Gauge manifold for R32, R410A
Vacuum pump for R32, R410A
Charge hose for R32, R410A
Pipe cutter with reamer
Water bottle
0.9 to 1.0 L water
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1-2. SELECTING THE INSTALLATION LOCATION
INDOOR UNIT
• Where airflow is not blocked.
• Where cool (or warm) air spreads over the entire room.
• Where it is not exposed to direct sunshine. Do not expose to direct sunshine
also during the period following unpacking to before use.
• Where easily drained.
• At a distance 1 m or more away from your TV and radio. Operation of the
air conditioner may interfere with radio or TV reception. An amplifier may
be required for the affected device.
• In a place as far away as possible from fluorescent and incandescent lights. In
order to make the infrared remote control operate the air conditioner normally.
The heat from the lights may cause deformation or the ultraviolet may cause
deterioration.
• Where the air filter can be removed and replaced easily.
• Where it is away from the other heat or steam source.
REMOTE CONTROLLER
• Where it is easy to operate and easily visible.
• Where children cannot touch it.
• Select a position about 1.2 m above the floor and check that signals from
the remote controller are surely received by the indoor unit from that posi-
tion (‘beep’ or ‘beep beep’ receiving tone sounds). After that, attach remote
controller holder to a pillar or wall and install wireless remote controller.
Note:
In rooms where inverter type fluorescent lamps are used, the signal from the
wireless remote controller may not be received.
Note:
Avoid the following places for installation where air conditioner trouble is
liable to occur.
• Where flammable gas could leak.
• Where there is much machine oil.
• Where oil is splashed or where the area is filled with oily smoke (such as
cooking areas and factories, in which the properties of plastic could be
changed and damaged).
• Salty places such as the seaside.
• Where sulfide gas is generated such as hot spring, sewage, waste water.
• Where there is high-frequency or wireless equipment.
• Where there is emission of high levels of VOCs, including phthalate
compounds, formaldehyde, etc., which may cause chemical cracking.
• The appliance shall be stored so as to prevent mechanical damage from
occurring.
1-3. SPECIFICATIONS
*1 Connect to the power switch which has a gap of 3 mm or more when open to
interrupt the source power phase. (When the power switch is shut off, it must
interrupt all phases.)
*2 Use wires in conformity with design 60245 IEC 57.
*3 Never use pipes with thickness less than specified. The pressure resistance will
be insufficient.
*4 Use a copper pipe or a copper-alloy seamless pipe.
*5 Be careful not to crush or bend the pipe during pipe bending.
*6 Refrigerant pipe bending radius must be 100 mm or more.
*7 Insulation material : Heat resisting foam plastic 0.045 specific gravity
*8 Be sure to use the insulation of specified thickness. Excessive thickness may
cause incorrect installation of the indoor unit and insufficient thickness may cause
dew drippage.
Model Power supply *1 Wire specifications *2 Pipe size (thickness *3, *4, *5, *6)Insulation thickness *7, *8Rated Voltage Frequency Indoor/outdoor connecting wire Gas Liquid
MLZ-KP25/35VF
230 V 50 Hz 4-core 1.5 mm
2
ø9.52 mm
(0.8 mm)ø6.35 mm
(0.8 mm)14 mmø12.7 mm
(0.8 mm)MLZ-KP50VF
CAUTION (Could lead to serious injury in particular environments when operated incorrectly.)
■ Install an earth leakage breaker depending on
the installation place.
If an earth leakage breaker is not installed, it could
cause electric shock.
■ Perform the drainage/piping work securely ac-
cording to the installation manual.
If there is defect in the drainage/piping work, water
could drop from the unit, soaking and damaging
household goods.
■ Do not touch the air inlet or the aluminum fins
of the outdoor unit.
This could cause injury.
■ Do not install the outdoor unit where small ani-
mals may live.
If small animals enter and touch the electric parts
inside the unit, it could cause a malfunction, smoke
emission, or fire. Also, advise user to keep the area
around the unit clean.
■ Do not operate the air conditioner during interior
construction and finishing work, or while waxing
the floor.
Before operating the air conditioner, ventilate the
room well after such work is performed. Otherwise, it
may cause volatile elements to adhere inside the air
conditioner, resulting in water leakage or scattering
of dew.
WARNING
This unit should be installed in rooms which exceed the floor space
specified in outdoor unit installation manual.
• Refer to outdoor unit installation manual.
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Air outlet
Where airflow
is not blocked.
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Air inlet
200 mm or more
Ceiling surfaceCeiling surface Grille
Ceiling surface
1-4. INSTALLATION DIAGRAM
Units should be installed by licensed contractor according to local code
requirements.
Be sure to use wall hole sleeve K to prevent indoor/outdoor
connecting wire D from contacting metal parts in the wall and to
prevent damage by rodents in case the wall is hollow.
ACCESSORIES
Check the following parts before installation.
Alkaline battery (AAA) for 2
Drain hose (with insulation)1
Special washer (with cushion, 4 pcs)8
Installation template 1
Fixing screw for M5 × 30 mm 4
Band 1
Fixing screw for 4 × 16 mm 2
Remote controller 1
Remote controller holder 1
Fixing screw for 3.5 × 16 mm (Black)2
PARTS TO BE PROVIDED AT YOUR SITE
A Refrigerant pipe 1
B Drain pipe (O.D. 26)1
C Installation tools (See 1-3)1
D Indoor/outdoor unit connecting wire*1
E Suspension bolt (M10)4
F Nut with flange (M10)8
G Nut (M10)4
H
Insulating material for A
(Heat resistant foamed polyethylene,
specific gravity 0.045, thickness more
than 14 mm)
1
J
Insulating material for B
(Foamed polyethylene, specific grav-
ity 0.03, thickness more than 10 mm)
1
K Wall hole sleeve 1
L Parts for mending wall hole
(putty, cover)1
M Pipe fixing band 2 to 7
N Fixing screw for M 2 to 7
P Piping tape 1 to 5
* Note:
Place indoor/outdoor unit connecting wire
D at least 1 m away from the TV antenna
wire.
Service space
• The dimensions of ceiling opening can be regulated within the range
shown in following diagram; so center the main unit against the open-
ing of ceiling, ensuring that the respective opposite sides on all sides
of the clearance between them becomes identical.
After the leak test, apply insulating material tightly so that there
is no gap.
When the piping is to be attached to a wall containing metals (tin
plated) or metal netting, use a chemically treated wooden piece 20
mm or thicker between the wall and the piping or wrap 7 to 8 turns
of insulation vinyl tape around the piping.
To use existing piping, perform COOL operation for 30 minutes and
pump down before removing the old air conditioner. Remake flare
according to the dimension for new refrigerant.
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5
Indoor unit
Wall hole
sleeve K
Seal the wall hole
gap with putty L.
Fix the pipe to wall
with pipe fixing
band M.
Cut off the
extra length.Pipe fixing band M
Fixing screw N
Wall hole cover L
WARNING
To avoid risk of fire, embed or protect the refrigerant
piping.
External damage on the refrigerant piping can be
cause of fire.
IMPORTANT NOTES
• To comply with the requirements of Australian standard AS/NZS
3000 electrical installations (wiring rules), the electrical wiring
required between the indoor and outdoor units must be installed by
a licenced electrical contractor.
• Check that cabling will not be subject to wear, corrosion, excessive
pressure, vibration, sharp edges or any other adverse environmental
effects. The check shall also take into account the effects of aging or
continual vibration from sources such as compressors or fans.
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2-1. CEILING OPENINGS AND SUSPENSION
BOLT INSTALLATION LOCATIONS
• Install the indoor unit at least 2.2 m above floor or grade level.For
appliance not accessible to the general public.
• Refrigerant pipes connection shall be accessible for maintenance
purposes.
• Make an opening in the ceiling 384 mm × 1160 mm in size. This func-
tions as a check window and will be needed later during servicing.
• If the dimensions are not accurate, when the grille is installed there
may be gaps between it and the indoor unit. This may result in dripping
water or other problems.
• When deciding on placement, consider carefully the space around the
ceiling and make your measurements generous.
• Ceiling types and building construction differ. Therefore you should
consult with the builder and decorator.
• Using the installation template (top of the package) and the gauge
(supplied as an accessory with the grille), make an opening in the
ceiling so that the main unit can be installed as shown in the diagram.
(The method for using the template and the gauge are shown.)
• Use M10 suspension bolts E.
• After suspending the indoor unit, you will have to connect the pipes
and wiring above the ceiling. Once the location has been fixed and the
direction of the pipes has been determined, place the refrigerant and
drainage pipes, and the wiring that connects the indoor and outdoor
units in their desired locations before suspending the indoor unit. This is
especially important in cases where the ceiling is already in existence.
• The packing material (cushion) is taped to the unit. When using the
packing material, do not remove it from the unit to prevent horizontal
vane damage.
1) Wooden structures
• Use tie beams (single storied houses) or second floor beams (two
story houses) as reinforcing members.
• Wooden beams for suspending air conditioners must be sturdy and
their sides must be at least 60 mm long if the beams are separated
by not more than 900 mm and their sides must be at least 90 mm
long if the beams are separated by as much as 1800 mm.
• Use channel, duct and other parts procured locally to suspend the
indoor unit.
2) Ferro-concrete structures
• Secure the suspension bolts using the method shown, or use steel
or wooden hangers, etc. to install the suspension bolts E.
• When the unit is put down with its lower surface facing down, place
packing material (cushion) underneath to prevent horizontal vane
damage.
Do not remove.Horizontal vane may be damaged.
Packing material (cushion)
Align center of ceiling opening and bolt distance
Outlet
(underside)
Air outlet
54.5 mm
20 mm
1051 mm
1160 mm Ceiling opening
1200 mm Grille outlet
54.5 mm
20 mm
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308
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1051 m
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2. INDOOR UNIT INSTALLATION
Ceiling panel
Rafter
Beam
Roof beam
Use inserts rated at
100-150 kg each
Suspension bolts M10
C channel
Channel suspension
bracket
Suspension bolt
Steel reinforcing rod
• Remove the packing material (cushion) before installing the plastic
bag and the cover.
• To prevent from dust, protect the indoor unit by covering with the plastic
bag and the cover.
• Remove the plastic bag and the cover before installing the grille (op-
tional).
Plastic bag
Cover
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Wall
Outdoor
side
2-2. HOLE DRILLING
1) Determine the wall hole position.
2) Drill a dia. 75 mm hole. The outdoor side should be 5 to 7 mm lower
than the indoor side.
3) Insert wall hole sleeve K.
Unit suspension procedures
• Adjust the length of the bolt’s protrusion from the ceiling surface before-
hand.
• Check the pitch of the suspension bolt E. (308 mm × 1051 mm)
1) Install special washer and their nuts F onto the suspension bolt
E in advance.
* Do this in the following order (from the top): nut F, special washer
with cushion , special washer , nut F, nut G.
* Position special washer, with cushion with the insulated surface
pointing down, as in the figure.
2) Lift the unit into place, aligned properly with suspension bolt E. Pass
the bracket between special washer, with cushion and special
washer , which are already in place, and secure it. Do the same in
all four places.
* Make sure the suspension bolt E extends 70 mm or more from the
surface of the ceiling. Otherwise you will not be able to install the
grille (optional).
* If the points for securing the grille are not flush with the ceiling
surface, water may condense, or the panel may not open/close.
3) If the long opening in the bracket and opening in the ceiling do not
align, adjust them until they do.
4) Check that the four places for securing the grille are all level using a
spirit level.
5) Tighten all the nuts.
2-3. DRAIN PIPING
• Use drain pipe B for drain piping. Be sure to connect the piping joints
using adhesive of polyvinyl chloride family to prevent leakage.
• Before drain piping work, remove the pipe cover, hose band, pipe band,
and spacer (cushion). Dispose of the spacer (cushion), as it will not be
needed.
• Drain hose is 550 mm long, so that drain piping exit can be moved
up. Cut drain hose into appropriate length before connecting.
Hose band
Pipe band
Pipe cover
Indoor unit side
Cut within this area
Drain piping side
(Connect drain
pipe B)
ø75 mm 5-7 mm
550 mm
430 mm
Ceiling surface
Make sure these surfaces are flush with each other (0-3 mm).
Point for securing grille Point for securing grille
Drain pan
70
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12
2
m
m
Point for securing grille
Point for securing grille
Enlarged view
Suspension bolt (M10)
Make sure these surfaces are flush with each other (0-3 mm).
Spacer (cushion)
1 2
1 PushSecure 2 Secure 3 Position in the center
Unit
Nut with flange (M10)
Special washer (with cushion, 4 pcs)
Special washer
Nut with flange (M10)
Nut (M10)
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• Insert the drain pipe B completely into drain piping connecting part.
• Apply insulating material J until drain piping connecting part, as shown above.
Drain hose connecting part
Drain hose Drain piping connecting part (with socket)
1/100 or more downward slope
Drain piping connecting part
Drain hose Insulating material J
Drain piping connecting partAbout 60 mm from the end
Drain piping connecting part
Drain pipe B
Drain hose
Drain hose connecting part
50
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1/100 or more downward slope
* Drain hose can be cut by tools such as cutters.
Ceiling
• Connect drain pipe B directly to drain piping connecting part (socket
side) of drain hose .
• Be sure to connect drain hose to the indoor unit side as shown in the
illustration on the right. Be sure to connect the drain hose connecting
part using adhesive of polyvinyl chloride family to prevent leakage.
• To bring up the drain exit, first arrange drain hose to go upward
vertically, and then provide 1/100 or more downward slope, as shown
in the illustration below.
• If the drain piping pass indoor, be sure to apply insulating material J
(Foamed polyethylene, specific gravity 0.03, thickness more than 10 mm).
Connect drain hose connecting part using adhesive of polyvinyl chloride
family before installing the hose band.
Drain hose
Drain pipe B
* Do not make drain piping as shown.
Pipe elbow
Hose band
• Apply insulating material J until drain piping connecting part, as shown
in the upper right illustration.
• Drain piping should form a downward slope (1/100 or more) to the
outdoor drain exit. Do not form trap or raise the pipe.
• Do not arrange the pipe horizontally for more than 20 m. When the
drain piping is too long, use support metal to prevent the drain pipe
from forming an up or down curve. Be sure not to install a air bleeder.
(Since drain lift-up mechanism is built-in, drain may blow out.)
• Odor trap for drain outlet is not necessary.
• For grouped piping, arrange piping so that the grouped piping is about
100 mm lower than the unit drain exit, as shown in the figure. Use about
a drain pipe (O.D. 38 mm) for grouped piping, and arrange it so that it
forms about 1/100 or more downward slope.
• Do not place drain piping directly into a place where ammonia gas or
sulfuric gas is formed, such as sewage tanks or septic tanks.
0.75 m to 1.5 m
Support metalInsulating
material J
1/100 or more downward slope
As much as possible
(about 100 mm)
Air bleeder Do not raise Tip of drain hose
dipped in water
At least 50 mm
gap
Odor trap
61 mm
61 mm
As short as possible
Drain pipe B
Drain pipe B
Ceiling
As long as possible
(about 100 mm)Drain pipe
(O.D. 38 mm)
1/100 or more
downward slope
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Indoor terminal block
Indoor/outdoor unit
connecting wire D
Outdoor terminal block
Earth wire
(green/yellow)
• Make earth wire a little longer than others. (More than 55 mm)
• For future servicing, give extra length to the connecting wires.
2-4. CONNECTING WIRES FOR INDOOR UNIT
1) Remove electrical cover (1).
2) Remove cord clamp.
3) Pass indoor/outdoor unit connecting wire D process the end of the
wire.
4) Loosen terminal screw, and connect first the earth wire, then indoor/
outdoor unit connecting wire D to the terminal block. Be careful not
to make mis-wiring. Fix the wire to the terminal block securely so that
no part of its core is appeared, and no external force is conveyed to
the connecting section of the terminal block.
5) Firmly tighten the terminal screws to prevent them from loosening.
After tightening, pull the wires lightly to confirm that they do not move.
6) Secure indoor/outdoor unit connecting wire D and the earth wire with
the cord clamp. Never fail to hook the left claw of the cord clamp. Attach
the cord clamp securely.
Lead wire
3-1. PIPING WORK
1) Remove the pipe cover, hose band, pipe band, and spacer (cushion)
of the indoor unit. Dispose of the spacer (cushion), as it will not be
needed.
2) When using pipe with super insulating material (about ø48 mm liquid
pipe, ø51 mm gas pipe) for indoor connecting pipe, remove plate and
turn it over so that the concave part faces upward.
When the ceiling is above 2.4 m and 2.7 m or below
Move the slide switch (SW3) to the right to increase airflow volume.
* When the ceiling is above 2.7 m, airflow volume may be insufficient
even with the slide switch (SW3) set to “increase airflow”.
1) Make sure that the breaker for air conditioner is turned OFF.
2) Remove electrical cover (1) and (2) of the indoor unit.
3) Slide out the electronic control P.C. board, and switch up the slide
switch (SW).
4) Put the electronic control P.C. board back to the original position, and
install electrical cover (1) and (2).
Note:
• Perform static elimination before setting.
• Default setting is Normal.
Electrical cover (1)
Electrical cover (2)
Electronic
control P.C.
board
Plate
Pipe band Plate
(turn over)Plate
35 mm
15 mm
Pipe cover
Electrical cover (1)
Slide switch SW3
Normal Increase airflow
volume
Spacer (cushion)
3. FLARING WORK AND PIPE CONNECTION
Indoor/outdoor unit
connecting wire D
Cord clamp
Terminal block
[When using pipe with super insulating material]
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3-3. PIPE CONNECTION
• In case of reconnecting the refrigerant pipes after detaching, make the
flared part of pipe re-fabricated.
• Fasten flare nut with a torque wrench as specified in the table.
• When fastened too tight, flare nut may brake after a long period and
cause refrigerant leakage.
• Be sure to wrap insulation around the piping. Direct contact with the
bare piping may result in burns or frostbite.
Indoor unit connection
Connect both liquid and gas pipings to indoor unit.
• Apply a thin coat of refrigeration oil on the seat surface of pipe.
• For connection, first align the center, then tighten the first 3 to 4 turns
of flare nut.
• Use tightening torque table above as a guideline for indoor unit side
union joint section, and tighten using two wrenches. Excessive tightening
damages the flare section.
Outdoor unit connection
Connect pipes to stop valve pipe joint of the outdoor unit in the same
manner applied for indoor unit.
• For tightening, use a torque wrench or spanner and use the same
tightening torque applied for indoor unit.
3-2. FLARING WORK
1) Cut the copper pipe correctly with pipe cutter. (Fig. 1, 2)
2) Completely remove all burrs from the cut cross section of pipe. (Fig. 3)
• Put the end of the copper pipe to downward direction as you remove
burrs in order to avoid to let burrs drop in the piping.
3) Remove flare nuts attached to indoor and outdoor units, then put them
on pipe having completed burr removal. (Not possible to put them on
after flaring work.)
4) Flaring work (Fig. 4, 5). Firmly hold copper pipe in the dimension shown
in the table. Select A mm from the table according to the tool you use.
5) Check
• Compare the flared work with Fig. 6.
• If flare is noted to be defective, cut off the flared section and do flaring
work again.
Pipe diameter
(mm)
Nut
(mm)
A (mm) Tightening torque
Clutch
type tool
for R32,
R410A
Clutch
type tool
for R22
Wing nut
type tool
for R22
N•m kgf•cm
ø6.35 (1/4”) 17
0 to 0.5 1.0 to 1.5
1.5 to 2.0 13.7 to 17.7 140 to 180
ø9.52 (3/8”) 22 34.3 to 41.2 350 to 420
ø12.7 (1/2”) 26 2.0 to 2.5 49.0 to 56.4 500 to 575
ø15.88 (5/8”) 29 -73.5 to 78.4 750 to 800
Copper
pipe
Good
90°
Tilted Uneven Burred
No good
Fig. 1 Fig. 2
Burr Copper pipe
Spare reamer
Pipe cutter
Fig. 4Fig. 3
Smooth all
around
Even length
all around
Inside is shin-
ing without any
scratches.
Fig. 5 Fig. 6
A
Flare nut
Die Copper pipe
Clutch type
Flaring tool
Wing nut type
3-4. INSTALLING THE PIPE COVER
Make sure to install the pipe cover. Incorrect installation results in water
leakage.
• No insulation is needed on the pipe connecting part of the indoor side
for this unit. The pipe cover gathers the water condensed around the
pipe connecting part.
1) Install the pipe band removed in 3-1. to secure the connecting pipes.
* The pipe band should hold down the insulating material of connecting
pipe. Insulating material should protrude 10 mm or more than the pipe
band, as shown in the illustration on the right.
2) Install pipe cover.
When using pipe with super insulating material
(about ø48 mm liquid pipe, ø51 mm gas pipe)
1) Make sure that the plate is turned over, and the concave part is facing
upward. (Refer to 3-1.)
2) Use band provided with the unit. (Do not use the pipe band attached
to the unit)
3) Connecting pipe exit of pipe cover is precut. Cut it along the line.
4) Install pipe cover.
Note:
Install pipe cover and pipe band securely. Incomplete installation will
cause water to drip from the unit, soaking and damaging household goods.
Insulating material
should protrude 10
mm or more than
the edge of pipe
band
Pipe band
Pipe cover
Band (accessory part)
Fixing screw
Cut
Pipe cover
Insulating material
should protrude 10 mm
or more than the edge
of pipe band
Insulating material
should protrude 10 mm
or more than the edge
of pipe band
Insulating material
should protrude 10
mm or more than
the edge of pipe
band
Fixing screw
When installing the unit, securely connect the refrigerant
pipes before starting the compressor.
[When using pipe with super
insulating material]
WARNING
WARNING
Reusable mechanical connectors and flared joints are
not allowed indoors.
When connecting the refrigerant piping by brazing,
rather than using flare connections, complete all brazing
prior to connecting indoor unit to outdoor unit.
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4-1. TEST RUN
• Do not operate the unit for long periods at places such as building under
construction. This may cause dust or odor to adhere to the unit.
• Perform test run with the attendance of user, as much as possible.
1) Press the E.O. SW once for COOL, and twice for HEAT operation. Test
run will be performed for 30 minutes. If the left lamp of the operation
indicator blinks every 0.5 seconds, inspect the indoor/outdoor unit
connecting wire D for mis-wiring. After the test run, emergency mode
(set temperature 24ºC) will start.
2) To stop operation, press the E.O. SW several times until all LED lamps
turn off. Refer to operating instructions for details.
Checking the remote (infrared) signal reception
Press the OFF/ON button on the remote controller and check that an
electronic sound is heard from the indoor unit. Press the OFF/ON button
again to turn the air conditioner off.
• Once the compressor stops, the restart preventive device operates so
the compressor will not operate for 3 minutes to protect the air condi-
tioner.
Water drainage check
1) Fill the drain pan with about 0.9–1.0 liters of water. (Don’t pour water
directly into the drain pump.)
2) Make a test run of the unit (in Cooling mode).
3) Check for water drainage at the outlet of the drainage pipe.
4) Stop the test run. (Don’t forget to turn off the power.)
4-2. WATER DRAINAGE CHECK FOR INDOOR
UNIT ONLY
If the wiring work has not been completed, connect terminals S1 and
S2 on the indoor terminal block to a 230 V single-phase power supply.
1) Start the drain pump test run.
• Press the emergency operation switch for 5 seconds (until a beep is
heard) to start the operation of only the drain pump.
• The two operation monitor lamps start blinking.
2) Stop the drain pump test run.
• Press the emergency operation switch again to stop the operation of
the drain pump. Even if you do not stop the drain pump, it will stop
automatically after 15 minutes.
• The operation monitor lamps turn off.
4-3. AUTO RESTART FUNCTION
This product is equipped with an auto restart function. When the power
supply is stopped during operation, such as during blackouts, the function
automatically starts operation in the previous setting once the power sup-
ply is resumed. (Refer to the operating instructions for details.)
4-4. EXPLANATION TO THE USER
• Using the OPERATING INSTRUCTIONS, explain to the user how to
use the air conditioner (how to use the remote controller, how to remove
the air filters, how to remove or put the remote controller in the remote
controller holder, how to clean, precautions for operation, etc.)
• Recommend the user to read the OPERATING INSTRUCTIONS care-
fully.
Caution:
• After test run or remote signal reception check, turn off the unit with
the E.O. SW or the remote controller before turning off the power
supply. Not doing so will cause the unit to start operation automati-
cally when power supply is resumed.
To the user
• After installing the unit, make sure to explain the user about auto
restart function.
• If auto restart function is unnecessary, it can be deactivated. Consult
the service representative to deactivate the function. Refer to the
service manual for details.
E.O.
SW
Emergency
operation switch
(E.O. SW)
Water bottle
5. GRILLE (OPTION) INSTALLATION
Refer to the procedures indicated in the installation manual of the Grille (option).
4. TEST RUN
Cover
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En-10
Refer to the procedures indicated in the installation manual of the outdoor unit.
• Connect an interface to the indoor control board of an air conditioner with a connecting cable.
• Cutting or extending the connecting cable of the interface results in defects in connecting. Do not bundle the connecting cable together with power supply
cord, indoor/outdoor connecting wire, and/or earth wire. Keep as much distance as possible between the connecting cable and those wires.
• The thin part of the connecting cable should be stored and placed where customers cannot touch it.
6. PUMPING DOWN
7. CONNECTING AN INTERFACE (OPTION) TO THE AIR CONDITIONER
When pumping down the refrigerant, stop the compressor before disconnecting
the refrigerant pipes. The compressor may burst if air etc. get into it.
1) Fix the cable tie to the connecting cable at 270 mm from the edge of the insulation coating part. Attach the mounting cord clamp (medium) to the interface
side of the cable tie.
2) Remove the grille. (If the grille has been already installed)
3) Remove the electrical cover (1), (2).
Refer to 2-4. CONNECTING WIRES FOR INDOOR UNIT.
4) Slide out the indoor control board, and connect the connecting cable to CN105 and/or CN104 on the indoor control board.
5) Remove the screw shown in the photo blow. Route the connecting cable according to the photo below. Fix the mounting cord clamp (medium), which has
attached to the connecting cable, with the screw.
6) Reinstall the indoor control board and the electrical cover (1), (2).
7) Reinstall the grille.
Mounting cord clamp (medium)
Cable tie
270 mm Insulation coating part
Screw
Mounting cord clamp
(medium)
Connecting cable
Cable tie
Thin part of the connecting cable. Place this part
where customers cannot touch it.
Room air conditioner
Indoor control board CN105 for interface
CN104 for connector
cable
Thick part of the
connecting cable
Main body of an interface
Connector
Fix the connecting cable at the prescribed position securely.
Incorrect installation may cause electric shock, fire, and/ or malfunction.
WARNING
WARNING
07/22/2024
RG79Y947H01
HEAD OFFICE: TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN
This product is designed and intended for use in the residential, commercial and
light-industrial environment.
07/22/2024