Carrier 42QPCT18C-708F - Page 46

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LEGEND
Earth
L Live power supply.
N Neutral power supply.
R Live connection indoor/outdoor unit.
C Neutral connection indoor/outdoor unit.
Y Compressor control.
O Reversing valve control.
W2 Outdoor fan motor control.
S Outdoor coil sensor.
LEGEND
Earth
L Live power supply.
N Neutral power supply.
R Live connection indoor/outdoor unit.
C Neutral connection indoor/outdoor unit.
Y
Com
p
ressor control.
CONNECTING ELECTRICAL WIRING (Cont.)
18-6 CONNECTING ELECTRICAL WIRING FOR COOL ONLY SYSTEM
Sizes of electrical wires
L N R C Y
4 mm
2
4 mm
2
1 mm
2
1 mm
2
1 mm
2
18-7 CONNECTING ELECTRICAL WIRING FOR HEAT PUMP SYSTEM
Important Note
Outdoor coil sensor must be first connected in outdoor unit 38QPCT18H-708
and electrical connection S – S must be made between outdoor and indoor units.
Sizes of electrical wires
L N R C Y O W2 S
4 mm
2
4 mm
2
1 mm
2
1 mm
2
1 mm
2
1 mm
2
1 mm
2
1 mm
2
NOTES
(1) Connect the power supply to the outdoor unit and then get the power required
for the indoor unit from the outdoor unit.
(2) All dotted lines to be fitted by installer.
(3) Refer to wiring diagrams and stickers-caution sticked inside the outdoor & indoor units.
220-240V ~ 50Hz 1Ph
Circuit
Breaker
Main
Switch
Indoor
Unit
Outdoor
Unit
220-240V ~ 50Hz 1Ph
Circuit
Breaker
Main
Switch
Indoor
Unit
Outdoor
Unit