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1. BEFORE INSTALLATION

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.

1-2. SELECTING THE INSTALLATION LOCATION

1-3. SPECIFICATIONS

 

CAUTION

(Could lead to serious injury in particular environments when operated incorrectly.)

Required Tools for Installation

Phillips screwdriver
Level
Scale
Utility knife or scissors
65 mm hole saw
Torque wrench
Wrench (or spanner)

4 mm hexagonal wrench
Flare tool for R410A
Gauge manifold for R410A
Vacuum pump for R410A
Charge hose for R410A
Pipe cutter with reamer

N

  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.

N

  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. 

N

  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.

N

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 electrical 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.

N

Do not damage the wires by applying excessive 
pressure with parts or screws.

 

Damaged wires could cause fire or electric shock.

N

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.

N

  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 applied to the sections. Do not 
extend the wires, or use intermediate connection.

 

Incomplete connecting and securing could cause fire.

N

Do not install the unit in a place where inflammable 
gas may leak.

  If gas leaks and accumulates in the area around the 

unit, it could cause an explosion.

N

  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 defec-

tive contact, defective insulation, exceeding the permis-
sible current, etc.

N

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.

N

When plugging the power supply plug into the outlet, 
make sure that there is no dust, clogging, 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 sup-

ply plug or the outlet, it could cause electric shock or fire. If 
loose parts are found on the power supply plug, replace it.

N

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.

N

When installing or relocating the unit, make sure 
that no substance other than the specified refriger-
ant (R410A) enters the refrigerant circuit.

  Any presence of foreign substance such as air can 

cause abnormal pressure rise and may result in explo-
sion or injury.

N

Do not discharge the refrigerant into the atmosphere. If 
refrigerant leaks during installation, ventilate the room.

  If refrigerant comes in contact with a fire, harmful gas 

could be generated.

N

Check that the refrigerant gas does not leak after 
installation has been completed.

  If refrigerant gas leaks indoors, and comes into contact 

with the flame of a fan heater, space heater, stove, etc., 
harmful substances will be generated.

N

Use appropriate tools and piping materials for installation.

  The pressure of 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. 

N

When pumping down the refrigerant, stop the com-
pressor before disconnecting the refrigerant pipes.

 

If the refrigerant pipes are disconnected while the compres-
sor is running and 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.

N

When installing the unit, securely connect the re-
frigerant pipes before starting the compressor.

  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.

N

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.

N

The unit shall be installed in accordance with na-
tional wiring regulations.

N

  Earth the unit correctly.

 

Do not connect the earth to a gas pipe, water pipe, light-
ning rod or telephone earth. Defective earthing could 
cause electric shock.

N

   Install an earth leakage breaker depending on the 

installation place.

  If an earth leakage breaker is not installed, it could 

cause electric shock.

N

  Perform the drainage/piping work securely accord-

ing to the installation manual.

  If there is defect in the drainage/piping work, water 

could drop from the unit, soaking and damaging house-
hold goods.

N

  Do not touch the air inlet or the aluminum fins of 

the outdoor unit.

 

This could cause injury. 

N

  Do not install the outdoor unit where small animals 

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. 

INDOOR UNIT 

•  Where airflow is not blocked.
•  Where cool air spreads over the entire room.
•  Rigid wall without vibration.
•  Where it is not exposed to direct sunshine.
•  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 af-
fected device.

•  In a place as far away as possible from fluorescent and 

incandescent lights (so the infrared remote control can 
operate the air conditioner normally).

•  Where the air filter can be removed and replaced easily.

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 re-
ceived by the indoor unit from that position (‘beep’ or 
‘beep beep’ receiving tone sounds). After that, attach re-
mote controller holder to a pillar or wall and install wire-
less remote controller.

Note: 

In rooms where inverter type fluorescent lamps are used, 
the signal from the wireless remote controller may not be 
received.

OUTDOOR UNIT

•  Where it is not exposed to strong wind.
•  Where airflow is good and dustless.
•  Where rain or direct sunlight can be avoided as much as 

possible.

•  Where neighbours are not annoyed by operation sound 

or hot air.

•  Where rigid wall or support is available to prevent the 

increase of operation sound or vibration.

•  Where there is no risk of combustible gas leakage.
•  When installing the unit at a high level, be sure to secure 

the unit legs.

•  Where it is at least 3 m away from the antenna of TV set 

or radio. Operation of the air conditioner may interfere with 
radio or TV reception in areas where reception is weak. 
An amplifier may be required for the affected device.

•  Install the unit horizontally.
•  Please install it in an area not affected by snowfall or 

blowing snow. In areas with heavy snow, please install a 
canopy, a pedestal and/or some baffle boards.

Note:

It is advisable to make a piping loop near outdoor unit so as 
to reduce vibration transmitted from there.

*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 If pipe length exceeds 7 m, additional refrigerant (R410A) 

charge is required. (No additional charge is required for 
pipe length less than 7 m.)

 

Additional refrigerant = A × (pipe length (m) - 7)

*8 Insulation material : Heat resisting foam plastic 0.045 

specific gravity

*9 Be sure to use the insulation of specified thickness. Exces-

sive thickness may cause incorrect installation of the indoor 
unit and insufficient thickness may cause dew drippage.

Note: 

When operating the air conditioner in low outside tempera-
ture, be sure to follow the instructions described below.
•  Never install the outdoor unit in a place where its air 

inlet/outlet side may be exposed directly to wind.

•  To prevent exposure to wind, install the outdoor unit 

with its air inlet side facing the wall.

•  To prevent exposure to wind, it is recommended to install 

a baffle board on the air outlet side of the outdoor unit.

Avoid the following places for installation where air condi-
tioner trouble is liable to occur.
•  Where flammable gas could leak.
•  Where there is much machine oil.
•  Salty places such as the seaside.
•  Where sulfide gas is generated such as a hot spring.
•  Where there is high-frequency or wireless equipment.

 WARNING

(Could lead to death, serious injury, etc.)

JG79A103H07

SPLIT-TYPE AIR CONDITIONERS

INSTALLATION MANUAL

 ENGLISH

Model names are indicated in 1-3.

When installing multi units, refer to 
the installation manual of the multi 
unit for outdoor unit installation.

Model

Power supply *1

Wire specifications *2

Pipe size  

(thickness *3, *4)

Indoor unit

Outdoor unit

Rated 

Voltage

Frequency

Breaker 

capacity

Power supply

Indoor/outdoor 

connecting wire

Gas / Liquid

MSZ-GE22VA
MSZ-GE25VA
MSZ-GE35VA
MSZ-GE42VA

MUZ-GE25VA(H)
MUZ-GE35VA(H)
MUZ-GE42VA(H)

230 V

50 Hz

10 A

3-core  

1.0 mm

2

4-core  

1.0 mm

2

ø9.52 / 6.35 mm

(0.8 mm)

MSZ-GE50VA

MUZ-GE50VA(H)

16 A

3-core  

2.0 mm

2

ø12.7 / 6.35 mm

(0.8 mm)

(GE25, 35, 42/GE50)

Pipe length and height difference

Max. pipe length

20/30 m

Max. height difference

12/15 m

Max. number of bends *5, *6

10

Refrigerant adjustment A *7

30/20 g/m

Insulation thickness *8, *9

 

8 mm

Summary of Contents for MSZ-GE22VA

Page 1: ... break after a long period and cause refrigerant leakage N The unit shall be installed in accordance with na tional wiring regulations N Earth the unit correctly Do not connect the earth to a gas pipe water pipe light ning rod or telephone earth Defective earthing could cause electric shock N Install an earth leakage breaker depending on the installation place If an earth leakage breaker is not in...

Page 2: ...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 vi nyl tape around the piping To use existing piping per form COOL operation for 30 minutes and pump down before removing the old air conditioner Remake flare according to the dimension for new refrigerant Appearance of the outd...

Page 3: ... tape G apply taping starting from the entry of outdoor unit Stop the end of piping tape G with tape with adhesive agent attached When piping have to be arranged through above ceiling closet or where the tempera ture and humidity are high wind additional commercially sold insulation to prevent condensation Rear right or downward piping 1 Put the refrigerant piping and the drain hose together then ...

Page 4: ...ove method cannot be used Remove the front panel Then insert hexagonal wrenches into the square holes on the left and right sides of the unit and push them up as shown in the following figure The bot tom of the indoor unit lowers and releases the hooks Removal procedure 1 Remove the 2 screws which fix the panel assem bly 2 Remove the panel assembly Be sure to remove its bottom end first Installation ...

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