Cairox AOYG-KQTA Installation Manual Download Page 10

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CAUTION

• The primary power supply capacity is for the air conditioner itself, and does not

include the concurrent use of other devices.

• If the electrical power is inadequate, contact your electric power company.
• Install a breaker in a location that is not exposed to high temperatures.

If the temperature surrounding the breaker is too high, the amperage at which the
breaker cuts out may decrease.

• When using an earth leakage breaker that has been designed solely for ground fault

protection, be sure to install a fuse-equipped switch or circuit breaker.

• This system uses an inverter, which means that it must be used an earth leakage

breaker that can handle harmonics in order to prevent malfunctioning of the earth
leakage breaker itself.

• Do not use crossover power supply wiring for the outdoor unit.
• If the temperature surrounding the breaker is too high, the amperage at which the

breaker cuts out may decrease.

• When the electrical switchboard is installed outdoors, place it under lock and key so

that it is not easily accessible.

• Start wiring work after closing branch switch and over current breaker.
• Connection cable between indoor unit and outdoor unit is 230 V (single-phase) or

400 V (three-phase).

• Be sure not to remove thermistor sensor etc. from power wiring and connection wir-

ing. Compressor may fail if operated while removed.

• Do not fasten the power supply cable and connection cable together.
• Always keep to the maximum length of the connection cable. Exceeding the maxi-

mum length may lead to erroneous operation.

• Do not start operation until the refrigerant is charged completely. The compressor

will fail if it is operated before the refrigerant piping charging is complete.

• The static electricity that is charged to the human body can damage the control PC

Board when handling the control PC Board for address setting, etc.
Please keep caution to the following points.
Provide the grounding of Indoor unit, Outdoor unit and Option equipment.
Cut off the power supply (breaker).
Touch the metal section (such as the unpainted control box section) of the indoor or
outdoor unit for more than 10 seconds. Discharge the static electricity in your body.
Never touch the component terminal or pattern on the PC Board.

• Be careful not to generate a spark as follows for using a

ammable refrigerant.

- Do not remove the fuse while power is on.

- Do not disconnect plug from the wall outlet and the wiring while the power is on.

- It is recommended to position the outlet connection in a high position. Place the

cords so that they do not get tangled.

• Con

rm the indoor unit model name before connecting. If the indoor unit is not R32

compatible, error signal will be displayed, and the unit will be inoperable.

3.8.1. How to connect wiring to the terminal



Caution when wiring cable

• When stripping off the coating of a lead wire, always use a special tool such as a wire

stripper. If there is no special tool available, carefully strip the coating with a knife etc.

(1) Use ring terminals with insulating sleeves as shown in the

gure below to connect

to the terminal block.

(2) Securely clamp the ring terminals to the wires using an appropriate tool so that the

wires do not come loose.

Sleeve

Strip : 10 mm

Ring terminal

(3) Use the speci

ed wires, connect them securely, and fasten them so that there is no

stress placed on the terminals.

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

screwdriver that is too small, otherwise, the screw heads may be damaged and
prevent the screws from being properly tightened.

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

Wire

Screw with special washer

Ring terminal

Terminal blocks

Screw with
special washer

Wire

Ring terminal

(6) Refer to the table below for the terminal screw tightening torques.

Tightening torque [N·m (kgf·cm)]

M4 screw

1.2 to 1.8 (12 to 18)

M5 screw

2.0 to 3.0 (20 to 30)

3.8.2. Knock out holes for wiring

CAUTION

• Be careful not to deform or scratch the panel while opening the knock out holes.
• When cables are routed from the unit, a protection sleeve for the conduits can be

inserted at the knock out hole.

• If you do not use a wire conduit, be sure to protect the wires to prevent the edge of

the knock out hole from cutting the wires.

• It is recommended to apply anti-rust paint to the edge of the knock out hole.

• Knock out holes are provided 2 each in the same size in front, lateral and rear sides.



Installation method of One-touch bush

Please

x the one-touch bush (accessory) as shown below.

(Pipe cover rear)

(Pipe cover front)

One-touch bush

(accessories)

One-touch bush

(accessories)

Front connection

Lateral connection

Rear connection

NOTES:

Please ensure that the power supply cable and connection cables are not

installed through the same cable bush hole opening. They must be installed into
the two separate hole openings to prevent damage to the cable.

3.8.3. Wiring method

CAUTION

When connecting the power supply cable, make sure that the phase of the power
supply matches with the phase of the terminal board. If the phases do not match, the
compressor will rotate in reverse and will not be able to compress.



Connection diagrams

Single phase type

Power supply

Outdoor unit
side terminal

Indoor unit
side terminal

Power line

Earth
(Ground)

Three phase type