Cassette Type Air Conditioner Unit
4.7 Electrical Wiring
4.7.1 Wiring Precautions
①. Before obtaining access to terminals, all supply circuits must be disconnected.
②. The rated voltage of the unit is as shown as Table 3.5 and Table 3.6
③. Before turning on, verify that the voltage is within the 198~264V range(for single phrase unit).
④. Always use a special branch circuit and install a special receptacle to supply power to the air
conditioner.
⑤. Use a special branch circuit breaker and receptacle matched to the capacity of the air conditioner.
⑥. The special branch circuit breaker is installed in the permanent wiring. Always use a circuit that can
trip all the poles of the wiring and has an isolation distance of at least 3 mm between the contacts of
each pole.
⑦. Perform wiring work in accordance with standards so that the air conditioner can be operated safely
and positively.
⑧. Install a leakage special branch circuit breaker in accordance with the related laws and regulations
and electric company standards.
①. The power source capacity must be the sum of the air conditioner current and the current of other
electrical appliances. When the current contracted capacity is insufficient, change the contracted
capacity.
①. When the voltage is low and the air conditioner is difficult to start, contact the power company to
raise the voltage.
4.7.2 Electrical Wiring
(1). For solid core wiring (Fig. 4.37)
1). Cut the wire end with a wire cutter or wire-cutting pliers, then strip the insulation about 10
mm (15/16") .
2). Using a screwdriver, remove the terminal screw(s) on the terminal board.
3). Using pliers, bend the solid wire to form a loop suitable for the terminal screw.
4). Shape the loop wire properly, place it on the terminal board and tighten securely with the
terminal screw using a screwdriver.
(2). For strand wiring (Fig. 4.37)
1). Cut the wire end with a wire cutter or wire-cutting pliers, then strip the insulation about 10
mm (3/8") .
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