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9
ELECTRICAL WIRING
This chapter provides an introduction to electrical wiring for the CITY MULTI-S series, together with notes concerning power
wiring, wiring for control (transmission wires and remote controller wires), and the frequency converter.
9-1. OVERVIEW OF POWER WIRING
Use a separate power supply for the outdoor unit and indoor unit.
(1)
Bear in mind ambient conditions (ambient temperature, direct sunlight, rain water,etc.) when proceeding with the wiring and connections.
(2)
The wire size is the minimum value for metal conduit wiring. The power cord size should be 1 rank thicker consideration of voltage drops.
(3)
Make sure the power-supply voltage does not drop more than 10 %.
Specific wiring requirements should adhere to the wiring regulations of the region.
(4)
Power supply cords of parts of appliances for outdoor use shall not be lighter than polychloroprene sheathed flexible cord.
(5)
For example, use wiring such as YZW.
Install an earth longer than other cables.
(6)
Use copper supply wires. Use electric wires over the rating voltage 300V.
(7)
Warning:
Be sure to use specified wires to connect so that no external force is imparted to terminal connections. If connections are not fixed firmly,
·
it may cause heating or fire.
Be sure to use the appropriate type of overcurrent protection switch. Note that generated overcurrent may include some amount of direct
·
current.
Caution:
Some installation site may require attachment of an earth leakage breaker. If no earth leakage breaker is installed, it may cause an electric
·
shock.
Do not use anything other than breaker and fuse with correct capacity. Using fuse and wire or copper wire with too large capacity may cause a
·
malfunction of unit or fire.
9-2. WIRE DIAMETER AND MAIN POWER SWITCH CAPACITY
9-2-1. Wiring diagram for main power supply
Power supply
(Single phase 60Hz 208/230V)
Power supply
(single phase 60Hz 208/230V)
9-2-2. Power supply wire diameter and capacity
Model
~/N (single), 60Hz 208/230V
Outdoor Unit
P60
~/N (single), 60Hz 208/230V
Indoor Unit
*A breaker with at least 3.0 mm contact separation in each poles shall be provided. Use earth leakage breaker (NV).
**Use copper supply wires. Use the electric wires over the rating voltage 300V.
OCH502C
Breaker for Wiring
and Current Leakage
Breaker for Wiring
and Current Leakage
Indoor unit
Minimum Wire Thickness
(mm
Power Supply
Main Cable**
5.3 [AWG10] 5.3 [AWG10]
Outdoor unit
Grounded
Breaker
Breaker for Current
2
[AWG])
for
Wiring*
Ground
40 A
30 A 30 mA 0.1 sec. or less
Refer to installation manual of indoor unit.
100
Grounded
Pull box
Minimum
Maximum rating
circuit
of over current
Leakage
ampacity
protector device
35 A
40 A
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