MITSUBISHI ELECTRIC MSZ-GS30-36NA2 Split Type Air Conditioners Instruction Manual

MSZ-GS30-36NA2 Split Type Air Conditioners

Product Information

Product Name: Split-Type Air Conditioners

Model: MSZ-GS30/36NA2 MSY-GS30/36NA2

Installation Manual: JG79N281H05

Required Tools for Installation

• Phillips screwdriver
• 5/32 inch (4 mm) hexagonal wrench
• Level Scale
• Utility knife or scissors
• 3 inches (75 mm) hole saw
• Flare tool for R410A
• Gauge manifold for R410A
• Vacuum pump for R410A
• Torque wrench
• Charge hose for R410A
• Wrench (or spanner)
• Pipe cutter with reamer

Product Usage Instructions

1. Before Installation
2. The Following Should Always Be Observed for
   Safety

  *  _Warning:_ 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 falling, or leakage of water.

  * When installing the unit, use appropriate protective equipment  

and tools for safety. Failure to do so could cause injury.

  * 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.

  * Do not alter the unit. It may cause fire, electric shock,  

injury, or water leakage.

  * 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 telephone 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. Attach 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, 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.

  * Securely attach the electrical cover to the indoor unit and the  

service panel to

ENGLISH

JG79N281H05

SPLIT-TYPE AIR CONDITIONERS
INSTALLATION MANUAL

MSZ-GS30/36NA2 MSY-GS30/36NA2

Required tools for installation

Phillips screwdriver

5/32 inch (4 mm) hexagonal

Level Scale Utility knife or scissors 3 inches (75 mm) hole saw

wrench Flare tool for R410A Gauge manifold for R410A Vacuum pump for R410A

Torque wrench

Charge hose for R410A

Wrench (or spanner)

Pipe cutter with reamer

1. Before 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.

Warning (Could lead to death or serious injury.)

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 falling, or leakage of water.
When installing the unit, use appropriate protective equipment and tools for
safety.
Failure to do so could cause injury.
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.
Do not alter the unit.
It may cause fire, electric shock, injury or water leakage.
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 tele-
phone 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. Attach
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, 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.
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, relocating, or servicing the unit, 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 case, this could lead to a serious impediment to securing product safety.
Do 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. When opening or closing the valve below freezing temperatures, refrigerant may
spurt out from the gap between the valve stem and the valve body, resulting in
injuries.
Exercise caution when using any auxiliary heat source and follow all third party
manufacturer instructions and safety guidelines for installation and usage.
Any auxiliary heat source connected to this unit via the CN24 connection must
have an independent temperature control mechanism. Failure to install and main-
tain such temperature control mechanism may void the warranty for this unit.
Mitsubishi Electric shall not bear any warranty obligation or other liability for any
damage or loss in connection with such third party auxiliary heaters.

Caution (Could lead to serious injury when operated incorrectly.)

Please follow applicable federal, state, or local codes to prevent potential
leakage/electric shock. Or install a ground fault interrupt for the prevention of
leakage and electric shock.
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.
Do not touch the air inlet or the aluminum fins of the outdoor unit.
This could cause injury.

Please wear protective equipment when you touch the base of the outdoor unit.
It could cause injury if you do not wear the protective equipment.
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

Indoor Unit

Note:

Note:

· Where airflow is not blocked.

In rooms where inverter type fluorescent lamps are used, · It is advisable to make a piping loop near outdoor unit

· Where cool (or warm) air spreads over the entire room. the signal from the wireless remote controller may not be so as to reduce vibration.

· On a rigid wall to reduce the possibility of vibration.

received.

· For increased efficiency, install the outdoor unit in a

· Where it is not exposed to direct sunlight. Do not expose

location where continuous direct sunlight or excessive

to direct sunlight also during the period following unpack- Outdoor Unit

water can be avoided as much as possible.

ing to before use.

· Where it is not overly exposed to strong winds.

· Where it can be easily drained.

· Where airflow is good and dustless.

Note:

· At a distance 3 feet (1 m) or more away from a TV and · Where neighbours are not annoyed by operation sound When operating the air conditioner in low outside tem-

radio. Operation of the air conditioner may interfere with or hot (or cool) air.

perature, be sure to follow the instructions described

radio or TV reception. An amplifier may be required for · Where rigid wall or support is available to prevent the

the affected device.

increase of operation sound or vibration.

· In a place as far away as possible from fluorescent and · Where there is no risk of combustible gas leakage.

incandescent lights. In order to make the infrared remote · If installing the unit in a location high above the ground,

control operate the air conditioner normally. The heat be sure to secure the unit legs.

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

from the lights may cause deformation or the ultraviolet · Where it is at least 10 feet (3 m) away from the antenna

on the air outlet side.

may cause deterioration.

of TV set or radio. Operation of the air conditioner may Avoid the following places for installation where air

· Where the air filter can be removed and replaced easily. interfere with radio or TV reception in areas where recep-

· Where it is away from the other heat or steam source.

tion is weak. An amplifier may be required for the affected

Note: Install the indoor unit high on the wall where air can distribute over the entire room.

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

conditioner trouble is liable to occur. · Where flammable gas could leak. · Where there is an excessive amount of machine oil
in the air. · Where oil is splashed or where the area is filled with
oily smoke (such as cooking areas and factories, in

Remote Controller
· Where it is convenient to operate and easily visible. · Where children cannot easily touch it. · Select a position about 4 feet (1.2 m) above the floor.

a canopy, a pedestal and/or baffle boards.

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.

Check that signals from the remote controller from

· Where there is emission of high levels of VOCs,

that position are received by the indoor unit (beep’ orbeep beep’ receiving tone sounds). When the remote

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

controller holder is supplied, install it at a position from

which the indoor unit can receive signals.

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 Min. AWG14 or stranded conductor Min. 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 Min. AWG12. · 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.

Electrical specifications

MODEL

MSY-GS30NA2 MSY-GS36NA2 MSZ-GS30NA2 MSZ-GS36NA2

INDOOR UNIT

Power supply (V, PHASE, Hz)

208/230, 1, 60

Min. Circuit Ampacity (A)

1.0

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

0.76

OUTDOOR UNIT

Power supply (V, PHASE, Hz)

208/230, 1, 60

Max. Fuse size (time delay)

(A)

25

Min. Circuit Ampacity (A)

22

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

0.93

(R.L.A) (A)

13.8

Compressor

(L.R.A) (A)

17.3

Control voltage

Indoor unit – Remote controller: (Wireless) Indoor unit – Outdoor unit: DC12-24 V (Polar)

1-3-2. Refrigerant Pipes · To prevent condensation, insulate the two refrigerant pipes. · Refrigerant pipe bending radius must be 4 inches (100 mm) or more.
Caution Be sure to use the insulation of specified thickness (table on the right). Excessive insulation may cause incorrect installation of the indoor unit, and too little insulation may cause condensate to form.

Pipe
For liquid For gas

Outside diameter
1/4 (6.35) 5/8 (15.88)

Minimum wall thickness

Insulation thickness

inch (mm)

0.0315 (0.8) 5/16 (8)

0.0394 (1.0) 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 feet (7.5 m), additional refrigerant (R410A) charge is required. (The outdoor unit is charged with refrigerant for pipe length up to 25 feet [7.5 m])
· Please carefully consider the indoor unit location when piping lengths are less than 16 feet (5 m) as there could be intermittent noises during normal operation that would be noticeable in very quiet environments.

Pipe length Height difference No. of bends

Limits 100 feet (30 m) max. 50 feet (15 m) max. 10 max.

Pipe length

Up to 25 feet (7.5 m) Exceeding 25 feet (7.5 m)

No additional charge is required.
Additional charge is required. (Refer to the table below.)

Refrigerant to be added 1.08 oz. each 5 feet (20 g/m)

1-4. Installation Diagram

Accessories Check the following parts before installation.

(1) Installation plate

1

2-13/16 inches (72 mm) or more/ 5-1/8 inches (130 mm) or more for left/left rear piping (using spacer)

Attachment screws for the installa-

(2) tion plate

7

so (3)

4th×at2i5tsmcomre cannot be seen, Remote controller holder

and

no

external 1

force

affects

the

connecting

smi4ne-mc1ch)1teoi/o1sr 6nm(1oo2re0f

Screws for the remote controller

(4) holder

2

3.5 × 16 mm (Black)

(5) Battery (AAA) for (6)

2

(6) Wireless remote controller

1

(7)

Felt tape (For left or left-rear piping)

2

Use the wall hole sleeve (C) to prevent indoor/ outdoor connecting wire (A) from contacting metal parts in the wall and to protect the wiring from rodents.

Indoor unit
Wall hole sleeve (C)
Cut off the extra length. Pipe attachment strap (E)

Wall hole cover (D) Seal the wall hole gap with putty (H). Attach the pipe to wall with pipe attachment strap (E).
Attachment screw (F)

mi8n-mc1h)1eo/1sr6m(2o2r0e

After the leak test, apply insulating material tightly so that there is no gap.
Space for indoor unit working Please leave the space as shown in the picture for maintenance usage.

3/8 inch (10 mm) or more

(8) Air cleaning filter

2

Field-supplied parts (A) Indoor/outdoor unit connecting wire*1 1

(B) Extension pipe

1

4 inches (100 mm) or more
Installation Indoor unit plate

5.9 to 7.5 feet (1.8 to 2.3 m) from the floor is recommended 9-27/32 inches (250 mm) or more

(C) Wall hole sleeve

1

(D) Wall hole cover

1

(E) Pipe attachment strap

2 to 5

(F) Screw for (E) 4 × 20 mm

2 to 5

Note: Do not obstruct the air outlet.

Space
Cover the connection part with tape to prevent water from leaking.

(G) Piping tape

1

(H) Putty

1

Drain hose

(I) (or soft PVC hose, 15 mm inner

1

diameter or hard PVC pipe VP30)

Drain hose (J) (or soft PVC hose, 15 mm inner 0 or 1
diameter or hard PVC pipe VP16)

(K) Power supply cord*1

1

Note:

*1 Place indoor/outdoor unit connecting wire

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

4mimnc)hoersm(1o0re0

3Ua)cnRcitoesrmdsiohnvogeutlofldalboreecaninluscttsoadlaleettdarecbqhyuelidirceetmonesinenddtso.coor natnradcotourtdoor units, then put them on pipe.

clear *2

4minmc)heosr m(1o0r0e

When the piping is to be attached to a wall comprised of tin plate or metal netting, use chemically treated wooden piece 25/32 inch (20 mm) or thicker between the wall and the piping, or wrap 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.
Do not block the inlet of the outdoor unit with the excess part of the pipes.
Outdoor unit installation Unit: inch

Note: · T· hCeodmimpaernesitohnesflianrdeicdawteodrkinwthiteh aFrirgo.w6s. ( ) above
s· hIof wflatrheeisredqeufierecdtivsep,accuet tooffgtuhaerasnetceteiopnearnfodrmreapnecaet procedure. of the air conditioner. Install the outdoor unit where the maximum possible space can be provided,

clear *3

1m4min) cohremso(r3e50

· cFoanssteidneflrianrge lnautetrwreithlocaattoiorqnu, esewrvreicnecsh, oars rseppeacirifise. d in the table above.

· TWhheecnofoalsintegn/heedatoinogtpigehrtf,oflrmaraennceutamndaytheeveeffintcuieanllycybreak and cause refrigerant leakage.

of power usage may fall about 10% at the place

where short cycle is likely occur due to poor ventilation. Installing the air outlet guide (optional) can improve performances.

2 When front and sides of unit are clear, 20 inches (500 mm) or more 3 When any 2 sides of left, right and rear of unit are clear,
20 inches (500 mm) or more

· If air from the outlet blows against the wall, it may

cause stains on the wall.

· To connect, first align the center, then tighten the first 3 to 4 turns of flare nut, by hand.

using two wrenches. Excessive tightening damages the flare section.
Do not take in the outlet air discharged by other units directly.

15-3/8 13

6-7/8

33-1/16 19-11/16 Air inlet

13-3/4~14-5/8

Air outlet 2-3/8 × 13/16 slot 1-9/16
Unit: mm 840

175

500

Air inlet

349-371

390 330 Air inlet

1(54-030/4minmchoersmoor rme)ore 3(91-030/80inmcmheosromr omreo)re

Tighten the flare nut

2-10 × 21 slot

Air outlet 40

Drhauinmpidiiptyinagrefohrigohu, tudsoeoardudnitiiotnal field-supplied insulation to prevent condensation. Install the unit horizontally. Do not use drain socket in cold regions. Drain may freeze and make the fan stop. The outdoor unit produces condensate during the heating operation. Select the installation place to ensure to prevent the outdoor unit and/or the grounds from being wet by drain water or damaged by frozen drain water.

2. Indoor Unit Installation

2-1. Attaching the Installation Plate
· Find a stud in the wall to attach installation plate (1) horizontally by tightening the fixing screws (2) firmly.
· To prevent installation plate (1) from vibrating, be sure to install the attachment screws in
the holes indicated in the illustration. For added support, additional screws may also be
installed in other holes.
When the indoor unit is to be attached to a concrete wall using recessed bolts, secure
installation plate (1) using 7/16 inch × 13/16 inch · 7/16 inch × 1 inch (11 mm × 20 mm ·
11 mm × 26 mm) oval hole (17-3/4 inches [450 mm] pitch). · If the recessed bolt is too long, change it for a shorter one (field-supplied).

Installation plate (1)

Wall

4-11/16 inches

(120 mm)

or more

Ceiling Level

2-13/16 inches (72 mm) or more 5-1/8 inches (130 mm) or more for left/left rear piping (using spacer)

4 inches (100 mm)

8-11/16 inches (220 mm) or more

Wall

2-2. Drilling

1. Determine where the holes will be located on the wall. 2) Drill a ø 3 inches (75 mm) hole. The outdoor side should be 6/32 to 9/32 inch (5 to 7 mm)
   lower than the indoor side. 3) Insert wall hole sleeve (C).
   2-3. Connecting Wires for the Indoor Unit
   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.
2. Open the front panel. 2) Place the upper part of the indoor unit on the installation plate. 3) Remove electrical cover. 4) Remove VA clamp. 5) Remove corner box. 6) Remove cable guide. 7) Remove conduit plate. 8) Attach conduit pipe (for rear piping) / elbow joint (for right, left, or downward piping) to
   conduit plate with lock nut. The thread of the installed conduit pipe / elbow joint appearing inside should be less than 3/8 inch (10 mm). (Fig. 1) Elbow joint should appear less than 1-3/16 inches (30 mm) outside. (Fig. 2) 9) Process the end of ground wire (Fig. 3). Connect it to the ground terminal of electrical parts box. 10) Process the end of indoor/outdoor unit connecting wire (A) (Fig. 3). Attach it to the terminal
   block. Be careful not to make mis-wiring. Attach the wire to the terminal block securely so that its core cannot be seen, and no external force affects the connecting section of the terminal block. 11) Firmly tighten the terminal screws. After tightening, verify that the wires are tightly fastened. 12) Reinstall conduit plate. 13) Reinstall cable guide. 14) According to the piping direction, remove the shaded part of the left side of box (Fig. 4) or corner box (Fig. 5). 15) Reinstall VA clamp. 16) Reinstall electrical cover.
3. Reinstall panel assembly.

Attachment screw (2)
In the case of left or left rear piping. The position of the Liquid/Gas pipe union is shifted 2-3/16 / 1-9/16 inches (56/40 mm) to the left from the mark.

Insert the scale. *

Align the scale with the line. *

Center of ø 3 inches (75 mm) hole

• Same for left hole.

ø 3 inches (75 mm)

Wall
6/32-9/32 inch (5-7 mm) Outdoor side

Electrical cover
VA Clamp Electrical box

Pull tab to remove cable guide.

Indoor terminal block

Grounding terminal

Cable guide

Conduit plate
Lock nut
· Connect wires to the appropriate terminals
· For future servicing, leave some slack in the connecting wires.

or Elbow joint

Conduit pipe

Remark: * A disconnect switch should be
required. Check the local code. ** Use a ring tongue terminal in order to connect a ground wire to terminal.

INDOOR UNIT Terminal block

Disconnect switch*
Power supply 208/230 V AC, 1phase 2 wires, 60 Hz

208/230 V AC 1phase, 60 Hz
OUTDOOR UNIT

Grounding terminal*
Disconnect switch

Terminal block 2
Terminal block 1

Ground

Grounding terminal**

Conduit plate
2-3/16 inches (55 mm)

Less than 3/8 inch (10 mm) Lock nut Conduit pipe or elbow joint
Fig. 1
5/8 inch (15 mm)

Conduit plate

Less than 1-3/16 inches (30 mm)

Elbow joint (for right, left, or downward piping) Fig. 2

Lead wire

· Make ground wire a little longer than Remove panel

Box

others. (More than 1-9/16 inches [40 mm])

for piping on left side of unit

Remove panel for piping on bottom left side of unit

Fig. 3

Fig. 4

Corner box

Remove panel for piping on bottom side of unit

Remove panel

for piping on right

side of unit

Fig. 5

2-4. Pipe Forming and Drain Piping
2-4-1. Pipe Forming · Place the drain hose below the refrigerant piping. · Make sure that the drain hose is not crowded or bent. · Do not pull the hose when applying the tape. · When the drain hose passes the room, be sure to wrap it with insulation material (field-sup-
plied). Note: Make sure not to damage the cover of refrigerant pipe when attaching it back on with screws.
Left or left-rear piping Note: Be sure to reattach the drain hose and the drain cap if the piping is being installed on left or bottom left of unit, otherwise, water could drip down from the drain hose.

1. Place the refrigerant piping and the drain hose together, then firmly apply felt tape (7) from the end. Felt tape (7) overlap width should be 1/3 the tape width. Use a bandage stopper at the end of felt tape (7).
2. Pull out the drain cap at the back right of the indoor unit. (Fig. 1) · Hold the convex section at the end and pull the drain cap.
3. Pull out the drain hose at the back left of the indoor unit. (Fig. 2) · Hold the claw marked by the arrows and pull out the drain hose forward.
4. Put the drain cap into the section to which the drain hose is to be attached at the rear of the indoor unit. (Fig. 3) · Insert a screwdriver into the hole on the cap and insert the cap fully into the drain pan.
5. Insert the drain hose fully into the drain pan at the back right of the indoor unit. (Fig. 4) · Check if the hose is hooked securely to the projection of its inserting part at the drain pan.
6. Insert the drain hose into wall hole sleeve (C), and attach the upper part of indoor unit onto the installation plate (1). Then, shift the indoor unit completely to the left to make placing the piping in the back of the unit easier.
7. Cut out two pieces of cardboard from the shipping box (use any two pieces of the four pieces), roll each piece, hook them onto the back rib, and use them as spacer to lift the indoor unit. (Fig. 5)
8. Connect the refrigerant piping with the extension pipe (B). 9) Attach the lower part of the indoor unit into the installation plate (1).

Liquid pipe Gas pipe
Indoor/outdoor unit connecting wire (A) Felt tape (7) Piping tape (G)

Piping tape (G) Felt tape (7)

Remove panel for piping on left side of unit.

Drain cap

Fig. 1
Drain cap Fig. 3

Drain hose

Fig. 2

Drain hose

Fig. 4

Fig. 5

Rear or bottom piping 1) Place the refrigerant piping and the drain hose together, then firmly apply piping tape (G)
from the end. 2) Insert the piping and the drain hose into the wall hole sleeve (C), and attach the upper
part of the indoor unit on the installation plate (1). 3) Check if the indoor unit is attached securely on the installation plate (1) by moving the unit
to left and right. 4) Attach the lower part of the indoor unit into the installation plate (1).

Cut off in case of downward piping.

Right piping Note: Before performing the following, make sure that wiring is completed, and the conduit cover is installed. (Refer to 2-3.) 1) Place the refrigerant piping and the drain hose together, shift them to left side of the unit,
and then firmly apply piping tape (G) from the end. 2) Insert the piping and the drain hose into the wall hole sleeve (C), and attach the upper
part of the indoor unit on the installation plate (1). 3) Check if the indoor unit is attached securely on the installation plate (1) by moving the unit
to left and right. 4) Attach the lower part of the indoor unit into the installation plate (1).

2-4-2. Drain Piping · Do not cut the drain hose of the unit. (Fig. 1) · If the extension drain hose has to pass through a room, be sure to wrap it with insulation
(field-supplied). · The drain hose should point downward for easy drain. (Fig. 2) · If the drain hose provided with the indoor unit is too short, connect it with a field-supplied
drain hose (I). (Fig. 3) · When connecting the drain hose to a hard vinyl chloride pipe, be sure to insert it
securely into the pipe. (Fig. 4) · Make sure that no stress is applied to the connecting portion of the drain hose after
installing the indoor unit. Otherwise, breakage or water leakage may result. · Be sure to use the drain hose attached to the indoor unit. Otherwise, water leakage
or breakage due to chemical may result. · Do not apply any agent on the drain port. Doing so may cause breakage.
Do not put the drain pipe directly in a drainage ditch where Ammonia or Sulphuric gas may be generated. The evaporated corrosive gas may return to the indoor side through drain pipe and this may cause an unpleasant odor and corrosion on Heat exchanger may occur.

Fig. 1

Downward slope
Fig. 2

Drain hose
Soft hose I.D. 19/32 inch (15 mm)
Fig. 3

27-9/16 inches (70 cm) or more
Different diameter joint

Do not make drain piping as shown below.

Do not raise

Accumulated drain water
Air

Drain hose Hard vinyl chloride pipe I.D. 1-3/16 inches (30 mm) Insert securely
Fig. 4
At least Tip of drain 1-31/32 inches hose dipped (50 mm) gap in water

Water leakage

Water leakage

Waving

Water leakage

Ditch

3. Outdoor Unit Installation
3-1. Connecting Wires for the Outdoor Unit

1. Remove the service panel. 2) Remove the conduit cover. 3) Attach the conduit connector to conduit plate with lock nut then secure it against unit with
   screws. 4) Connect ground wires of indoor/outdoor unit connecting wire (A) and power supply cord
   (K) to the TB support. 5) Loosen the terminal screw, and attach indoor/outdoor unit connecting wire (A) from the
   indoor unit correctly on the terminal block. Attach the wire to the terminal block securely so that its core cannot be seen, and no external force affects the connecting section of the terminal block. 6) Firmly tighten the terminal screws. After tightening, verify that the wires are tightly fastened. 7) Connect power supply cord (K). 8) Install the conduit cover. 9) Install the service panel securely.

1-3/8 inches (35 mm)
Lead wire

5/8 inch (15 mm)

Power supply cord (K)

Service panel Lock nut
Conduit cover Conduit plate

Terminal block

Conduit pipe

TB support
Indoor/outdoor unit connecting wire (A)

to conduit cover

Grounding terminal
Power supply cord (K)
· Make ground wire a little longer than others. (More than 3-7/8 inches [100 mm])
· For future servicing, leave some slack in the connecting wires.

Pipe diameter inch (mm)

B inch (mm)

ø 1/4 (6.35)

21/32 (17)

ø 3/8 (9.52) 7/8 (22)

ø 1/2 (12.7) ø 5/8 (15.88)

1-1/32 (26)
1-5/32 (29)

A inch (mm)

Tightening torque

Clutch type tool for R410A

Clutch type tool for R22

Wing nut type tool for R22

ft-lb (kgf·cm)

N·m

0 to 0.02 (0 to 0.5)

0.06 to 0.08

10 to 13 (140 to 180)

13.7 to 17.7

0.04 to 0.06

(1.5 to 2.0)

25 to 30 (350 to 420)

34.3 to 41.2

(1.0 to 1.5)

36 to 42 0.08 to 0.10 (500 to 575)

49.0 to 56.4

(2.0 to 2.5)

54 to 58 (750 to 800)

73.5 to 78.4

3-2. Flare Connection

1. Cut the copper pipe as straight as possible with a pipe cutter. (Fig. 1, 2)
2. Remove all burrs from the cut section of the pipe, ensuring that precautions are taken to
   avoid getting metal shavings into the piping. (Fig. 3) 3) Remove flare nuts attached to indoor and outdoor units, then put them on pipe. 4) Flaring work (Fig. 4, 5). Firmly hold copper pipe in the dimension shown in the table. Select
   A inch (mm) from the table according to the tool you use. 5) Check
   · Compare the flared work with Fig. 6. · If flare is defective, cut off the section and repeat procedure.
   3-3. Pipe Connection
   · Fasten flare nut with a torque wrench as specified in the table above. · When fastened too tight, flare nut may eventually break 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 piping to indoor unit. · Do not apply refrigeration oil on screw threads. Excessive tightening torque will result in
   damage on the screw. · To connect, first align the center, then tighten the first 3 to 4 turns of flare nut, by hand. · Use tightening torque table above as a guideline for indoor unit side joints, 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 following the same procedure detailed in Indoor unit connection. · For tightening, use a torque wrench or spanner.
   Warning
   When installing the unit, securely connect the refrigerant pipes before starting the compressor.

3-4. Insulation and Taping

1. Cover piping joints with pipe cover. 2) For outdoor unit side, insulate the piping, including valves. 3) Apply piping tape (G) starting from the connection on the outdoor unit.
   · When piping has to be installed through a ceiling, closet or where the temperature and humidity are high, use additional field-supplied insulation to prevent condensation.

Copper pipe

Good 90°

No good

Fig. 1

Tilted Uneven Burred Fig. 2

Burr

Copper pipe

Spare reamer

Pipe cutter

Fig. 3

Flaring tool

Clutch type Wing nut type Fig. 4

Die Flare nut

Copper pipe Fig. 5

Smooth all around

Inside is shining without any scratches.

Even length all around
Indoor unit connection

Fig. 6

Flare nut
Internal thread side Tighten the flare nut with a torque wrench.
Outdoor unit connection

Union joint
External thread side
Grip the nut on the union joint with a spanner.

4. Purging Procedures, Leak Test, and Test Run

4-1. Purging Procedures and Leak Test

1. Remove service port caps from stop valves on both sides of refrigerant lines. (The stop valves are fully closed when shipped.) Leave closed.
2. Connect gauge manifold to ports of stop valves. 3) Evacuate the system to 4000 microns from both service valves. System manifold gauges
   must not be used to measure vacuum. A micron gauge must be used at all times. Break the vacuum with Nitrogen(N2) into the discharge service valve to 0 PSIG.
3. Evacuate the system to 1500 microns. Break the vacuum with Nitrogen(N2) into the discharge service valve to 0 PSIG. 5) Evacuate the system to 500 microns. 6) Close gauge manifold valves, stop the pump, and conduct a 30 minute rise test. 7) System should hold 500 microns for a minimum of 1 hour.
4. Fully open the valve stem of all stop valves on both sides of gas pipe and liquid pipe by the hexagonal wrench. If the valve stem hits the stopper, do not turn it any further. Operating without fully opening lowers the performance and this causes trouble. 9) Refer to 1-3 and charge the prescribed amount of additional refrigerant if needed. Be sure to charge slowly with liquid refrigerant. Otherwise composition of the refrigerant in the system may be changed and affect performance of the air conditioner. 10) Remove gauge manifolds and replace service port caps and tighten. 11) Leak test

4-2. Test Run

1. Insert power supply plug into the power outlet and/or turn

on the breaker.

2. Pressing the E.O. SW will perform a test run for 30 minutes.

(For MSZ, pressing the switch once will perform COOL

operation and twice will perform HEAT operation.) If the

left lamp of the operation indicator light blinks every 0.5

seconds, inspect the indoor/outdoor unit connecting wire

(A) for mis-wiring. After the test run, emergency mode (75°F

[24°C]) will start.

3. To stop operation, press the E.O. SW several times until

all LED lamps turn off. Refer to operating instructions for Emergency operation switch

details.

(E.O. SW)

Checking the remote (infrared) signal reception Press the OFF/ON button on the remote controller and listen for an audible indicator 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 conditioner.

Valve stem (inside)
Close Open

Stop valve cap (Torque 15 to 22 ft-lb, 19.6 to 29.4 N·m, 200 to 300 kgfcm)

Hexagonal wrench

­14.7 psi [Gauge] (­0.101 Mpa)
Stop valve for LIQUID
Handle Low
Stop valve for GAS

Compound pressure gauge (for R410A)
Pressure gauge (for R410A)
Gauge manifold valve (for R410A)
Handle High
Charge hose (for R410A)

Service port cap (Torque 10 to 13 ft -Ib, 13.7 to 17.7 N·m,
140 to 180 kgf·cm)

Adapter for

preventing the

back flow

Vacuum pump (or the vacuum

pump with the function to

prevent the back flow)

4-3. Auto Restart Function
This product is equipped with an auto restart function. When the power supply is cut off during operation, such as during blackouts, the function automatically starts operation in the previous setting once the power supply is resumed. (Refer to the operating instructions for details.)
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. If this procedure is not performed, the unit will automatically begin operation when power supply is resumed. To the user · After installing the unit, explain to 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.

Precautions when using the control valve When attaching the control valve to the service port, valve core may
deform or loosen if excess pressure
is applied. This may cause gas leak.

A Control valve

Service port

Open
Close Body

Charge hose

When attaching the control valve to the service port, make sure that the valve core is in closed position, and then tighten part A. Do not tighten part A or turn the body when valve core is in open position.

4-4. Explanation to the User
· Using the OPERATING INSTRUCTIONS, explain to the user how to use the air conditioner (the remote controller, removing the air filters, placing or removing the remote controller from the remote controller holder, cleaning methods, precautions for operation, etc.)
· Recommend that the user read the OPERATING INSTRUCTIONS carefully.

5. Relocation and Maintenance
5-1. Removing and Installing the Panel Assembly
Removal procedure (Fig. 1, 2) 1) Remove the three screws that attach the panel assembly. 2) Open the front panel. 3) Remove the two screws that attach the panel assembly. 4) Close the front panel. 5) Remove the panel assembly. Be sure to remove its bottom end first.
Installation procedure (Fig. 3, 4) 1) Point the horizontal vane slightly downward. 2) Attach the bottom of the panel assembly under the horizontal vane. 3) Fit in the top of the panel assembly. 4) Fit in the bottom of the panel assembly and tighten it using screws. 5) Push the section of the front panel marked by the arrows to close the front panel securely.
*Do not hold the A part when installing/removing or carrying the panel, or the panel might be damaged.

Fig. 1

Fig. 2

Fig. 3

Horizontal vane Fig. 4

A part : lower part of air outlet of the panel

5-2. Removing the Indoor Unit
Remove the bottom of the indoor unit from the installation plate. (Fig. 1, 2) · Remove the panel assembly. (Refer to 5-1) · Insert flat screwdrivers into the square holes at the left and right bottom of the indoor
unit and push them up; the bottom of the indoor unit goes down and the hooks are released. 1 Remove the screw. 2 Remove the tab of corner box from the indoor unit, and pull the corner box. *3 Pull the indoor unit to remove.

Corner box Fig. 1

Push Lower Square hole
Fig. 2

5-3. Pumping Down
When relocating or disposing of the air conditioner, pump down the system following the procedure below so that refrigerant is not released into the atmosphere. 1) Connect the gauge manifold valve to the service port of the stop valve on the gas pipe side of the outdoor unit. 2) Fully close the stop valve on the liquid pipe side of the outdoor unit. 3) Close the stop valve on the gas pipe side of the outdoor unit almost completely so that it can be easily closed fully when the pressure gauge shows 0 psi [Gauge] (0 Mpa). 4) Start the emergency COOL operation.
To start the emergency operation in COOL mode, disconnect the power supply plug and/or turn off the breaker. After 15 seconds, connect the power supply plug and/or turn on the breaker, and then press the E.O. SW once. (The emergency COOL operation can be performed continuously for up to 30 minutes.) 5) Fully close the stop valve on the gas pipe side of the outdoor unit when the pressure gauge shows (0.1 to 0 psi [Gauge] (0.05 to 0 Mpa)). 6) Stop the emergency COOL operation. To stop operation, press the E.O. SW several times until all LED lamps turn off. Refer to operating instructions for details.
Warning
When pumping down the refrigerant, stop the compressor before disconnecting the refrigerant pipes. The compressor may burst if air etc. get into it.

6. Connecting the Interface/Connector Cable to the Air Conditioner
· Connect the INTERFACE/CONNECTOR CABLE to the Indoor electronic control P.C. board of the air conditioner with the connecting cable. · Cutting or extending the connecting cable of the INTERFACE/CONNECTOR CABLE 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.

Connecting

Air conditioner

Thin part of the connecting cable. Place this part where customers cannot touch it.

CN105

Indoor electronic control P.C. board

CN105 for INTERFACE

Thick part of the connecting cable

1 Remove the panel and the lower right corner box.
2 Open the covers of the Indoor electronic control P.C. board.
3 Connect the connecting cable to CN105 on the Indoor electronic control P.C. board.
4 Attach the cable clamp provided with Interface to the thick part of the connecting cable with a screw 4×16 as shown in the figure.
5 Pass the connecting cable through the rib as shown in the figure.
6 Close the covers of the Indoor electronic control P.C. board. Be careful not to catch the thin part of the connecting cable in the cover. Reinstall the panel and the lower right corner box.

Warning
Fix the connecting cable at the prescribed position securely. Incorrect installation may cause electric shock, fire, and/or malfunction.

HEAD OFFICE: TOKYO BUILDING, 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN

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