Mitsubishi MSY-GA24NA Installation Guide

JG79A169H01

Phillips screwdriver 5/32 in. (4 mm) hexagonal Level wrench Scale Flare tool for R410A

Utility knife or scissors Gauge manifold for R410A 3 in. (75 mm) hole saw Vacuum pump for R410A

I Tools for Installation

Torque wrench Charge hose for R410A Wrench (or spanner) Pipe cutter with reamer

MITSUBISHI ELECTRIC

SPLIT-TYPE AIR CONDITIONERS

INSTALLATION MANUAL

MSZ-GA24NA MSY-GA24NA

When installing multi units, refer to the installation manual of the multi

unit for outdoor unit installation.

1-1. THE FOLLOWING SHOULD ALWAYS BE OBSERVED FOR SAFETY

• Be sure to read these safety precautions and instructions.

• Be sure to observe the warnings and cautions specified here.

• After reading this manual, be sure to store it with the OPERATING INSTRUCTIONS for future reference.

• Please report to your supply authority or obtain their consent before connecting this equipment to the power supply system.

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• Do not install the unit by yourself (user). Improper or incomplete installation could cause fire, electric shock, injury due to the unit falling, or water leakage. Consult a qualified installer or the dealer from

whom you purchased the unit.

• Follow the instructions detailed in the installation manual. Incomplete installation could cause fire or electric shock, injury due to the unit fall-

ing, or leakage of water.

• Install the unit securely in a place that can bear the weight of the unit. If the installation location cannot bear the weight of the unit, the unit could fall causing injury.

• Perform electrical work according to the installation manual and 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.

• Ground the unit correctly. Do not connect the ground wire to a gas pipe, water pipe, lightning rod or tel-

ephone ground. Defective grounding could cause electric shock.

• Do not damage the wires. Damaged wires could cause fire.

• Be sure to shut off the main power when setting up the indoor P.C. board or

wiring.

Failure to do so could cause electric shock.

• Use the specified wires to securely connect the indoor and outdoor units. At-

tach the wires firmly to avoid applying stress to the terminal block.

Improper connection could cause fire.

• Do not install the unit in a place where flammable gas may leak. If gas leaks and accumulates around the unit, it could cause an explosion.

• Do not use intermediate connection of the power cord or the extension cord.

Do not connect many devices to one AC outlet.

It could cause a fire or an electric shock.

• 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, blockage, or loose parts both in the outlet and on the plug. Verify that the power supply plug is completely in the outlet.

If there is dust, blockage, orloose 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.

• Securely attach the electrical cover to the indoor unit and the service panel to

the outdoor unit.

If the electrical cover of the indoor unit and/or the service panel of the outdoor unit are not attached securely, dust, water, etc. could collect in the unit and could cause a fire or an electric shock.

• When installing or relocating the unit, make sure that no substance other than

the specified refrigerant (R410A) enters the refrigerant circuit.

Any foreign substances in the refrigerant circuit can cause abnormal pressure rise or an explosion.

• De not discharge the refrigerant into the atmosphere. Check that the refrigerant gas

does not leak after installation has been completed. If refrigerant leaks during installation, ventilate the room.

If refrigerant comes in contact with a fire, harmful gas could be generated. If refrigerant gas leaks indoors, and comes into contact with the flame of a fan heater, space heater, stove, etc., harmful gases will be generated.

• Use appropriate tools and piping materials for installation. The pressure of R410A is 1.6 times higher than R22. Not using the appropriate tools and materials, or improper installation could cause the pipes to burst causing an 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, causing the pipes to burst.

• When installing the unit, securely connect the refrigerant pipes before starting

the compressor.

If the compressor is started before the refrigerant pipes are connected and the stop valve is open, air could be drawn in and the pressure in the refrigeration cycle could become abnormally high, causing the pipes to burst.

• Fasten a flare nut with a torque wrench as specified in this manual. If fastened too tight, a flare nut could break and cause refrigerant leakage.

• Install the unit according to national wiring regulations.

Required

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• Depending on the installation area, install a Ground Fault Interrupt (GFI) circuit • Do not touch the air inlet or the aluminum fins of the outdoor unit.

breaker.

If the Ground Fault Interrupt (GFI) circuit breaker is not installed, an electric shock could occur.

• Perform the drainage/piping work securely according to the installation

manual.

If there is defect in the drainage/piping work, water could drip from the unit, and damage household items.

This could cause injury.

• Do not install the outdoor unit where small animals may live. If small animals enter the unit and damage its electrical parts, it could cause a malfunction, smoke emission, or fire. Keep the area around the unit clean.

1-2. SELECTING THE INSTALLATION LOCATION

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Where airflow is not blocked. Where cool air aspreads over the entire room.

On a rigid wall to reduce the possibility of vibration. Where it is not exposed to direct sunlight. Where it can be easily drained. At a distance 3 ft. (1 m) or more away from a TV and radio. Operation of the air conditioner may interfere with radio or TV reception. An amplifier may be re- quired 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.

Note: Install the indoor unit high on the wall where air can dis-

tribute over the entire room.

Where it is convenient to operate and easily visible. Where children cannot easily touch it. Select a position about 4 ft. (1.2 m) above the floor. Check that signals from the remote controller from that position are received by the indoor unit ('beep' or 'beep beep' receiving tone sounds). Then, 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.

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• Where it is not overly exposed to strong winds.

• Where airflow is good and dustless.

• 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.

• If installing the unit in a location high above the ground, be sure to secure the unit legs.

• Where it is at least 10 ft. (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 re- ception 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 baffle boards.

Note:

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

• For increased efficiency, install the outdoor unit in a location where continuous direct sunlight or excessive

water can be avoided as much as possible.

Note: When operating the air conditioner in low outside tem-

3erature, 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 and a baffle

board on the air outlet side.

Avoid the following places for installation where air conditioner trouble is liable to occur.

• Where flammable gas could leak.

• Where there is an excessive amount of machine oil in the air.

• Salty places such as the seaside.

• Where sulfide gas is generated such as a hot

spring.

• Where there is high-frequency or wireless equipment.

1-3. SPECIFICATIONS

1-3-1. POWER SUPPLY AND INDOOR/OUTDOOR WIRE CONNECTION

• Power should be taken from an exclusive branched circuit.

• Wiring work should be based on applicable technical standards.

• Wiring connections should be made following the diagram.

• Securely tighten screws.

Connecting wires and the ground wire

• Use solid conductor AWG14 or stranded conductor AWG14.

• Use double insulated copper wire with 600 V insulation.

• Use copper conductors only.

* Follow local electrical codes.

Power supply cable and ground wire

• Use solid or stranded conductor AWG14.

• Use copper conductors only.

* Follow local electrical codes.

Note:

When the indoor unit is powered from the outdoor unit, depending on local code, a disconnect switch needs to be installed to a power supply circuit.

1-3-2. REFRIGERANT PIPES

• To prevent condensation, insulate the two refrigerant pipes.

• Refrigerant pipe bending radius must be 4 in. (100 mm) or more.

Z_ CAUTION

Be sure to use the insulation of specified thickness (table on the right). Excessive insula-

tion may cause incorrect installation of the indoor unit, and too little insulation may cause condensate to form.

Electrical specifications

MODEL MSY-GA24NA MSZ-GA24NA

Power supply 208/230, 1,60 (V, PHASE, Hz)

Min. CircuitAmpacity (A) 1.0 Fan motor (F.L.A.) (A) 0.76

Power supply (V, PHASE, Hz)

Max. Fuse size (time delay) (A)

Min. CircuitAmpacity (A) Fan motor (F.L.A.) (A)

I(R.L.A) (A)

Compressor (k._.A) (A)

Control voltage

Outside

Pipe

For liquid

For gas

diameter

1/4(6.35)

5/8 (15.88)

Indoor unit - Remote controller: (Wireless)

Indoor unit - Outdoor unit: DC12-24 V (Polar)

Minimum

wall thick-

ness

inch (ram)

0.0315 (0.8)

0.0394 (1.0)

208/230, 1,60

0.93

12.8 16

Insulation thickness

5/16 (8)

Insulation material

Heat resistant foam plastic 0.045 Specific

gravity

• The unit has flared connections on both indoor and outdoor sides.

• Remove the valve cover from the outdoor unit, then connect the pipe.

• Refrigerant pipes are used to connect the indoor and outdoor units.

• Be careful not to crush or over bend the pipe in pipe bending.

• Refrigerant adjustment... If pipe length exceeds 25 ft. (7.5 m), additional refrigerant (R410A) charge is required.

(The outdoor unit is charged with refrigerant for pipe length up to 25 ft. [7.5 m])

Limits

Pipe length 100 ft. (30 m) max. Height difference 50 ft. (15 m) max.

No. of bends 10 max.

Up to 25 ft. (7.5 m)

Pipe length

Exceeding 25 ft. (7.5 m)

Refrigerant to be added

MSZ-GA24NA J 1.08 oz. each 5 ft. (20 g/m) MSY-GA24NA

No additional charge is re-

quired.

Additional charge is required.

(Refer to the table below.)

1-4. INSTALLATION DIAGRAM

ACCESSORIES

Check the following parts before installation. <Indoor unit>

(1) Installation plate 1

Attachment screws for the instalia-

(2) tion plate 7

4 x 25 mm

(3) Remote controller holder 1

Screws for the remote controller

(4) holder 2

3.5 x 16 mm (Black) (5) Battery (AAA) for (6) 2 (6) Wireless remote controller 1

Felt tape 1

(7) For left or left-rear piping)

(8) Air cleaning filter 2

FIELD-SUPPLIED PARTS

(A) Indoor/outdoor unit connecting wire * 1 (B) Extension pipe 1 (C) Wall hole sleeve 1 (D) Wall hole cover 1 (E) Pipe attachment strap 2t05 (F) Screw for (E) 4 x 20 mm 2t05

(G) Piping tape 1

(H) Putty 1

Drain hose (or soft PVC hose, 19/32 in. [15

(I) mm] inner diameter or hard PVC 1

pipe VP16) (J) Refrigerant oil 1 (K) Power supply cord * 1

• Note: Place indoor/outdoor unit connecting wire (A)

and power supply cord (K) at least 3 ft. (1 m) away from the TV antenna wire.

Use the wall hole sleeve

parts in the wall and to

protect the wiring from

rodents.

Note:

Do not obstruct the air outlet.

_j------_ _-_(4J (3)

0,nnJe 0Omm)

(F)

(K)

(A)

_[ .,//Wall holecover (D)

indoor unit _Seai thewail hole ]

F)_) _gapwith putty(H). J

Wail hole F_J// ,

sl.... (C) HI L I Attach the pipe to |

• ' _/s!_,-_ wall with pipe at- | I//II F_ Uachment strap (E). J

Cut off the Pipeattachment extra Iength _'_strap (E)

Fixingscrew(F)

After the leak test, apply insulating mate- rial tightly so that there is no gap.

Space for indoor unit working

Please leave the space as shown in the

)icture for maintenance usage.

When the piping is to be attached to a wall comprised of tin plate or metal netting, use chemically treated wooden piece 25/32 in. (20 mm) or thicker between the wall and the piping, or wrap insulation vinyl tape 7 to 8 turns 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.

Outdoor unit installation

Unit: inch

6_ 9-11/16

i--@-_ Airinlet

I. 33-1/16

__4_ Air outlet

4-3/8 x 13/16 slot 1-18/32

I LI: °° :,,, ,

_'_ Air inlet _q[]

4-10x21 slot 40

Unit: mm

Units should be installed by licensed contractor accord ng to oca code requ rements.

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