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5
Electrical Wiring
5.1
General precautions on wiring
WARNING
Electric shock from live power supply cords
Electric shock may result from contact with live power supply cords.
► Wiring installation must only be performed by a qualified electrician.
► Before starting to work on any machines or devices, always switch off the power supply
and lock it in switched-off position.
CAUTION
The following precautions need to be followed strictly in the context of working on any
electrical wiring, to avoid hazardous situations which could result in minor or moderate
injury.
► Before wiring, confirm the rated voltage of the unit as shown on its nameplate, then carry
out the wiring closely following the wiring diagram.
► This equipment is not provided with a power supply cord. A circuit breaker must be
incorporated in the fixed wiring in accordance with national wiring regulations. The circuit
breaker must be approved, suitable for the voltage and current ratings of equipment and
have a contact separation in all poles.
► To prevent possible hazards from insulation failure, the unit must be grounded.
► Each wiring connection must be done in accordance with the wiring system diagram.
Wrong wiring may cause the unit to misoperate or become damaged.
► Do not allow wiring to touch the refrigerant tubing, compressor, or any moving parts of the
fan.
► Unauthorised changes in the internal wiring can be very dangerous. The manufacturer
will accept no responsibility for any damage or misoperation that occurs as a result of
such unauthorised changes.
► Regulations on wire diameters differ from locality to locality. For field wiring rules, please
refer to the relevant local electrical codes before beginning.
You must ensure that installation complies with all relevant rules and regulations.
► To prevent malfunction of the air conditioner caused by electrical noise, care must be
taken when wiring as follows:
► If the power supply cord of this appliance is damaged, it must be replaced by a repair
shop designated by the manufacturer, because special-purpose tools are required.
i
Important
For the recommended wiring lengths and diameters, please see →
p.
65.
5.2
Connection of wiring to terminals
Connect wiring to the terminals according to the following instructions.
AHU Kit – Installation Instructions – 07/2023
● The remote control wiring and the inter-unit control wiring should be wired apart
from the inter-unit power wiring.
● Use shielded wires for inter-unit control wiring (between units) and ground the
shield on both sides.
Electrical Wiring
5.5 Wiring system diagrams,
5
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