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Earth (Ground) the unit.

Do not connect the earth (ground) cable to a gas pipe, water pipe, lightning rod, or a

telephone earth (ground) cable.

Improper earthing (grounding) may cause electric shock.

Do not connect power supply cable to the transmission or remote controller terminals,

as this will damage the product.

Never bundle the power supply cable and transmission cable, remote controller cable

together.

Separate these cable by 50 mm or more.

Bundling these cables together will cause miss operation or breakdown.

When handling PCB, static electricity charged in the body may cause malfunction of the

PCB. Follow the cautions below:

• Establish an earth (ground) for the indoor and outdoor units and peripheral devices.

• Cut power (breaker) off.

• Touch metal part of the indoor units for more than 10 seconds to discharge static

electricity charged in the body.

• Do not touch terminals of parts and patterns implemented on PCB.

5.1. Electrical requirement

Voltage rating

Operating range

• Select the power cable type and size in accordance with relevant local and national

regulations.

• Specifications for local wiring power cord and branch wiring are in compliance with local

code.

• Max. wire length: Set a length so that the voltage drop is less than 2%. Increase the wire

diameter when the wire length is long.

Breaker should be installed at every refrigerant system. Do not use a breaker in a different

refrigerant system.

Refer to the table for the breaker specifications of each installation condition. Perform

the power crossover wiring within the range of the same refrigerant system. When the

crossover wiring is done, make a connection for indoor units to satisfy conditions A and B

below.

A. Current breaker requirements

Model

MCA

MFA

AS*A004GTAH

0.16 A

AS*A007GTAH

0.23 A

AS*A009GTAH

0.38 A

AS*E004GTAH

0.16 A

20 A

AS*E007GTAH

0.23 A

AS*E009GTAH

0.38 A

AS*A030GTAH

0.66 A

AS*A034GTAH

0.87 A

B. Earth leakage breaker requirements

Maximum connect-

able "indoor units"

Breaker capacity

or "indoor units +

RB units" *1

30 mA, 0.1 sec or less

44 or less *2

100 mA, 0.1 sec or less

45 to 148

5.1.1 Cable speciﬁ cations

Recommended

cable size (mm²)

Power supply cable

2.5

Transmission cable

0.33

Remote controller

0.33 to 1.25

cable (2-wire type)

*1: Use shielded cable in accordance with local rules for remote controller cable.

CAUTION

230 V

198 to 264 V (50 Hz)

198 to 253 V (60 Hz)

• MCA: Minimum Circuit Ampacity

• MFA: Maximum Fuse Ampacity

When the power crossover wiring is done, make it

so that the total of the MCA of the connected RB

units and indoor units does not exceed the 15 A.

For RB unit MCA, refer to the RB unit installation

manual.

If the capacity of connected RB units and indoor

units exceeds the upper limit, either add breakers

or use a breaker with a greater capacity.

*1: Heat pump type: indoor units,

Heat recovery type: indoor units

and RB units.

*2: If the total number of units con-

nected to the breaker exceeds 44,

either add a 30mA breaker, or use

breakers with a greater capacity.

Cable type

Remark

Type245 IEC57

2 Cable + earth (ground)

or equivalent

LONWORKS

22 AWG LEVEL 4 (NEMA)

compatible

non-polar 2 core, twisted pair

cable

solid core diameter 0.65 mm

Sheathed PVC

Non-polar 2 core, twisted

cable *1

pair

5.2. Wiring method

Example

Outdoor unit or RB unit *1

Transmission

Indoor unit

Remote

Transmission

control

Power supply

Breaker

Power supply

Remote controller

(Master)

*1: When connecting to the Heat Recovery System, refer to the installation manual of the

RB unit.

*2: Earth (Ground) the remote controller if it has an earth (ground) cable.

*3: The 3-wire type remote controller is not used.

(Crossover wiring of power supply)

Indoor unit

Power supply

Pull box

Breaker

Power supply

5.3. Unit wiring

• Before attaching the cable to terminal block.

5.3.1 Power supply cable

20 mm

Earth

(ground) cable

A. For solid core wiring

(1) To connect the electrical terminal, follow the below diagram and connect after looping

it around the end of the cable.

(2) Use the specified cables, connect them securely, and fasten them so that there is no

stress placed on the terminals.

(3) Use an appropriate screwdriver to tighten the terminal screws. Do not use a screw-

driver that is too small, otherwise, the screw heads may be damaged and prevent the

screws from being properly tightened.

(4) Do not tighten the terminal screws too much, otherwise, the screws may break.

(5) See the table for the terminal screw tightening torques.

(6) Please do not fix 2 power supply cables with 1 screw.

Strip 25 mm

Screw with

special washer

Cable

Cable end (Loop)

Terminal block

When using solid core cables, do not use the attached ring terminal. If you use the solid

core cables with the ring terminal, the ring terminal's pressure bonding may malfunction

and cause the cables to abnormally heat up.

Indoor unit

Breaker

Remote controller

(Slave)

Indoor unit

Power supply

Pull box

L (mm)

004/007/009

030/034

model

Loop

Screw with

special washer

Cable end (Loop)

Cable

WARNING

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