37
3
Electrical Connection
DANGER
The power supply must be cut off before any electrical work is carried out. Do not conduct electrical work
when the power is on; otherwise, it may cause serious personal injury.
The air conditioning unit must be earthed reliably and must meet the requirements of the local country/
region. If the earthing is not reliable, serious personal injury due to electric leakage may occur.
WARNING
Installation, inspection or maintenance operations must be completed by professional technicians. All parts
and materials must comply with the relevant regulations of the local country/region.
The air conditioning unit must be equipped with a special power supply, and the power supply voltage should
conform to the nominal working voltage range of the air conditioning unit.
The power supply of the air conditioning unit must be equipped with a power disconnect device that conforms
to the requirements of relevant local technical standards for electrical equipment. The power disconnecting
device must be equipped with short circuit protection, overload protection and electric leakage protection.
The clearance between open contacts of the power disconnecting device shall be at least 3mm.
The core of the power supply cable must be made of copper, and the wire diameter should meet the current-
carrying requirements. For details, refer to the "Power supply cable Diameter and Electric Leakage Protector
Selection". A wire diameter that is too small may cause the power supply cable to heat up, resulting in a fire.
The power supply cable and the earth wires should be secured reliably to avoid stress on the terminals. Do
not pull the power supply cable forcibly; otherwise, the wiring may become loosened or the terminal blocks
may be damaged.
Strong current wires such as power supply cable cannot be connected to weak current wires such as
communication wiring; otherwise, the product may be seriously damaged.
Do not bond and connect the power supply cable. Bonding and connecting the power supply cable may
cause it to heat up, resulting in a fire.
CAUTION
Avoid bonding and connecting the communication wiring. If doing so is unavoidable, at the very least, ensure
a reliable connection by crimping or soldering and make sure the copper wire at the connection is not
exposed; otherwise, communication failure may occur.
The power supply cable and communication wiring must be routed separately, with a distance of over 5 cm.
Otherwise, communication failure may occur.
Keep the vicinity of the air conditioning unit as clean as possible to avoid small animals from nesting and
biting the cables. If a small animal touches or bites the cables, short circuiting or electric leakage may occur.
Do not connect the earth wires to the gas pipe, water pipe, lightning rod earth wires or telephone earth wires.
Gas pipe: Risk of explosion and fire when gas leaks.
Water pipe: If rigid plastic pipes are used, there will be no earthing effect.
Lightning rod earth wires or telephone earth wires: In the event of lightning strikes, abnormal earth potential
may rise.
After all wiring is completed, check carefully before turning on the power supply.
