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.)
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. 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 in-
candescent 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 received by the
indoor unit from that position (‘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.
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 pos-
sible.
• Where neighbours are not annoyed by operation sound or
hot air.
• Where rigid wall or support is available to prevent the in-
crease 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 ampli-
fier 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 pres-
sure 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 temperature,
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 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 a hot spring.
• Where there is high-frequency or wireless equipment.
• Where there is emission of high levels of VOCs, includ-
ing phthalate compounds, formaldehyde, etc., which may
cause chemical cracking.
WARNING
(Could lead to death, serious injury, etc.)
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-EF22VE(W/B/S)
—
230 V
50 Hz
—
—
4-core
1.0 mm
2
ø9.52 / 6.35 mm
(0.8 mm)
MSZ-EF25VE(W/B/S)
MSZ-EF35VE(W/B/S)
MSZ-EF42VE(W/B/S)
MUZ-EF25VE
MUZ-EF35VE
MUZ-EF42VE
10 A
3-core
1.0 mm
2
MSZ-EF50VE(W/B/S)
MUZ-EF50VE
16 A
3-core
2.0 mm
2
ø12.7 / 6.35 mm
(0.8 mm)
(EF25, 35, 42/EF50)
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
N
Do not install the unit by yourself (user).
Incomplete installation could cause fire, 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 instal-
lation manual.
Incomplete installation could cause fire, electric shock, injury
due to the unit falling, or leakage of water.
N
When installing the unit, use appropriate protective
equipment and tools for safety.
Failure to do so could cause injury.
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, expe-
rienced 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 incom-
plete electrical work, it could result in a fire or an electric shock.
N
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.
N
Do not damage the wires by applying excessive pres-
sure 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 out-
door 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 defective
contact, defective insulation, exceeding the permissible cur-
rent, 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, relocating, or servicing 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 explosion or injury.
The use of any refrigerant other than that specified for the
system will cause mechanical failure, system malfunction, or
unit breakdown. In the worst case, this could lead to a seri-
ous impediment to securing product safety.
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 instal-
lation 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 installa-
tion.
The pressure of R410A is 1.6 times more than R22. Not us-
ing appropriate tools or materials and incomplete installation
could cause the pipes to burst or injury.
N
When pumping down the refrigerant, stop the compres-
sor 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 in-
jury.
N
When installing the unit, securely connect the refriger-
ant 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 pe-
riod and cause refrigerant leakage.
N
The unit shall be installed in accordance with national
wiring regulations.
N
Install an earth leakage breaker depending on the instal-
lation place.
If an earth leakage breaker is not installed, it could cause
electric shock.
N
Perform the drainage/piping work securely according to
the installation manual.
If there is defect in the drainage/piping work, water could
drop from the unit, soaking and damaging household 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.
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
JG79R590H01
SPLIT-TYPE AIR CONDITIONERS
INSTALLATION MANUAL
ENGLISH
Model names are indicated in 1-3.
When installing multi units, refer to the instal-
lation manual of the multi unit for outdoor unit
installation.
