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Installation Procedure
5. Electric wiring
DANGER OF BODILY INJURY OR DEATH
TURN OFF ELECTRIC POWER AT CIRCUIT BREAKER OR POWER
SOURCE BEFORE MAKING ANY ELECTRIC CONNECTIONS.
GROUND CONNECTIONS MUST BE COMPLETED BEFORE MAKING
LINE VOLTAGE CONNECTIONS.
(1) Selection of size of power supply and interconnecting wires.
Precautions for Electric wiring
Electric wiring work should be conducted only by authorized personnel.
Do not connect more than three wires to the terminal block. Always use round
type crimped terminal lugs with insulated grip on the ends of the wires.
Use copper conductor only.
Select wire sizes and circuit protection from table below. (This table shows 20 m
length wires with less than 2% voltage drop.)
Item
Phase
Model
HBU-18CF03
HBU-18HF03
1
HDU-18CF03
HDU-18HF03
HDU-28CF03
1
HDU-28HF03
(2) Wiring connection
For the detailed wiring connection with the indoor units, see the corresponding indoor
operation and instruction manual.
WARNING
Circuit breaker
Switch breaker
Overcurrent protector
(A)
rated capacity (A)
30
20
40
36
11
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Electric wiring
Earth leakage breaker
Power source
wire size
Switch
Leak
(minimum)
current
breaker
2.5mm
2
30
30mA
4.0mm
2
40
30mA
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