Mitsubishi Electric MSZEF25VE2BKIT, MSZEF35VE2BKIT, MSZEF42VE2BKIT, MSZEF50VE2BKIT Installation Guide

SPLIT-TYPE AIR CONDITIONERS

ENGLISH

INSTALLATION MANUAL

JG79R296H01

Model names are indicated in 1-3.

This installation manual describes only
for the indoor unit. Refer to the MXZ
type manual for outdoor unit set up.

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

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.

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

N

N

If refrigerant gas leaks indoors, and comes into contact

N

The pressure of R410A is 1.6 times more than R22.

N

N

If the compressor is started before the refrigerant pipes

N

If fastened too tight, a flare nut may break after a long

N

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

N

If small animals enter and touch the electric parts inside

Note:

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

Pipe size

Indoor/outdoor

connecting wire

4-core

1.0 mm

*7

(thickness *3, *4)

Gas / Liquid

ø9.52 / 6.35 mm

2

ø12.7 / 6.35 mm

(0.8 mm)

(0.8 mm)

*8 Insulation material : Heat resisting foam plastic 0.045

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

Do not install the unit by yourself (user).

N

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

N

installation manual.

Incomplete installation could cause fire, electric shock,

or injury due to the unit falling, or leakage of water.

When installing the unit, use appropriate protective

N

equipment and tools for safety.

Failure to do so could cause injury.

Install the unit securely in a place which can bear

N

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,

N

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.

Earth the unit correctly.

N

Do not connect the earth to a gas pipe, water pipe, light-

ning rod or telephone earth. Defective earthing could
cause electric shock.

Do not damage the wires by applying excessive

N

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

N

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

N

outdoor units securely and attach the wires firmly to
the terminal block connecting sections so the stress

Install an earth leakage breaker depending on the

N

installation place.

If an earth leakage breaker is not installed, it could

cause electric shock.

Perform the drainage/piping work securely accord-

N

ing to the installation manual.

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.

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

N

If gas leaks and accumulates in the area around the

unit, it could cause an explosion.

Do not use intermediate connection of the power

N

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

N

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,

N

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.

Attach the electrical cover to the indoor unit and the

N

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,

N

make sure that no substance other than the speci­fied refrigerant (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

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

N

the outdoor unit.

This could cause injury.

1-2. SELECTING THE INSTALLATION LOCATION

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 af­fected 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 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
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.

1-3. SPECIFICATIONS

Model Power supply *1 Wire specifications *2

Indoor unit Outdoor unit

MSZ-EF22VA(W/B/S)
MSZ-EF25VA(W/B/S)
MSZ-EF35VA(W/B/S)
MSZ-EF42VA(W/B/S)

MSZ-EF50VA(W/B/S)

*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.

–

Rated

Voltage

*7

Frequency

230 V 50 Hz –

Breaker
capacity

*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 Refer to the installation manual of the multi-type outdoor

units.

*7

WARNING

CAUTION

Power supply

–

Required Tools for Installation

case, this could lead to a serious impediment to secur­ing product safety.

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.

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

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

Use appropriate tools and piping materials for installation.

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 refrigerant 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 refrigeration 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 compressor.

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.

period and cause refrigerant leakage.

The unit shall be installed in accordance with na­tional wiring regulations.

Do not install the outdoor unit where small animals

may live.

the unit, it could cause a malfunction, smoke emission,
or fire. Also, advise user to keep the area around the
unit clean.

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.

• 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, includ­ing phthalate compounds, formaldehyde, etc., which
may cause chemical cracking.

specific gravity

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

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



1-4. INSTALLATION DIAGRAM

Indoor unit

Wall hole
sleeve (C)

Cut off the
extra length.

Pipe fixing band
(E)

Be sure to use wall hole
sleeve (C) to prevent in­door/outdoor connecting
wire (A) from contacting
metal parts in the wall and
to prevent damage by
rodents in case the wall is
hollow.

Wall hole cover (D)

Seal the wall hole
gap with putty (H).

Fix the pipe to wall
with pipe fixing
band (E).

Fixing screw
(F)

ACCESSORIES

Check the following parts before installation.
<Indoor unit>

(1) Installation plate 1

Installation plate fixing screw

(2)

4 × 25 mm

(3) Remote controller holder 1

Fixing screw for (3) 3.5 × 16 mm

(4)

(Black)

(5) Battery (AAA) for (6) 2
(6) Wireless remote controller 1

Felt tape

(7)

(For left or left-rear piping)

(8) Soft drycloth (VAB type only) 1

PARTS TO BE PROVIDED
AT YOUR SITE

(A) Indoor/outdoor unit connecting wire* 1
(B) Extension pipe 1
(C) Wall hole sleeve 1
(D) Wall hole cover 1
(E) Pipe fixing band 2 to 5
(F) Fixing screw for (E) 4 × 20 mm 2 to 5
(G) Piping tape 1
(H) Putty 1

Drain hose

(I)

(or soft PVC hose, 15 mm inner
diameter or hard PVC pipe VP16)

(J) Refrigeration oil 1
(K) Power supply cord* 1

* Note:

Place indoor/outdoor unit connecting wire (A)
and power supply cord (K) at least 1 m away
from the TV antenna wire.

Units should be installed by licensed contrac­tor according to local code requirements.

5

2

1

1 or 2

mm or

128

mm or

72

more/

left back piping

more for left and

107.5 mm
or more

(using spacer)

more

7 mm or

117.5

mm

or more

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.

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.

2. INDOOR UNIT INSTALLATION

CAUTION

Protective film covers the front panel of some indoor units. When installing
those indoor units, leave the film on it to prevent scratching until installation
completes.

2-1. FIXING OF INSTALLATION PLATE

• Find a structural material (such as a stud) in the wall and fix installation plate (1) hori­zontally with fixing screws (2).

• To prevent installation plate (1) from vibrating, be sure to install the fixing screws in
the holes indicated in the illustration. For added support, fixing screws may also be
installed in other holes.

• When the knockout is removed, apply vinyl tape to the knockout edges to prevent
damaging the wires.

• When bolts recessed in the concrete wall are to be utilized, secure installation plate (1)
using 11 × 20 · 11 × 26 oval hole (450 mm pitch).

• If the recessed bolt is too long, change it for a shorter one available in the market.

2-2. WALL HOLE DRILLING

1) Determine the wall hole position.

2) Drill a ø65 mm hole. The outdoor side should be
5 to 7 mm lower than the indoor side.

3) Insert wall hole sleeve (C).

Ceiling

Installation plate (1)

107.5

mm

or more

Wall Wall

Fixing screw (2)

2-3. CONNECTING WIRES FOR INDOOR UNIT

Level

You can connect indoor/outdoor lead wire without removing the front panel.

1) Open the front panel.

2) Remove VA clamp.

ø65 mm

72

mm or more

128

mm or more for left and left

back piping (using spacer)

Insert
the
scale. *

Align the
scale with
the line. *

Wall

117.5

or more

100 mm

* Same for left hole.

5-7 mm

Outdoor
side

mm

Center of
ø65 mm hole

3) Pass indoor/outdoor unit connecting wire (A) from the back of the indoor unit and proc­ess the end of the wire.

4) Loosen terminal screw, and connect first the earth wire, then indoor/outdoor unit con­necting wire (A) 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 (A) and the earth wire with the VA clamp.
Never fail to hook the left claw of the VA clamp. Attach the VA clamp securely.

Terminal block

VA clamp

Fixing screw

15 mm

35 mm

Lead wire

• For future servicing, give extra length to the
connecting wires.

• Make earth wire a little longer than others.
(More than 60 mm)

• Do not fold the excess wire, or cram it into
small space. Take caution not to damage
the wires.

• Be sure to attach each screw to its corre­spondent terminal when securing the cord
and/or the wire to the terminal block.
Note: Do not place the wires between the
indoor unit and the installation plate (1).
Damaged wire could cause heat generation
or fire.

Earth wire
(green/yellow)

Indoor/outdoor unit
connecting wire (A)

2-4. PIPE FORMING AND DRAIN PIPING

Pipe Forming

• Place the drain hose below the refrigerant piping.

• Make sure that the drain hose is not heaved or snaked.

• Do not pull the hose when applying the tape.

• When the drain hose passes the room, be sure to wrap
insulation material (obtainable at a store) around it.

Indoor/outdoor unit
connecting wire (A)

Indoor terminal block

Outdoor terminal block

Liquid pipe

Gas pipe

Indoor/outdoor unit
connecting wire (A)

Felt tape (7)

Piping tape (G)