Field Electrical Connections Matching - Carrier Harmony 53VMC18A-H Service And Maintenance Manual

9. FIELD ELECTRICAL CONNECTIONS MATCHING

- Connect the power supply to the outdoor unit and then get the power required for the indoor unit from the outdoor unit.
- Refer to wiring diagrams and stickers-caution sticked inside the outdoor & indoor units.
9-1 CONNECTING ELECTRICAL WIRING FOR HEAT PUMP SYSTEM
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.
Sizes of electrical wires connecting outdoor and indoor units
R
1 mm
9-2 CONNECTING ELECTRICAL WIRING FOR COOL ONLY SYSTEM
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.
Sizes of electrical wires connecting
outdoor and indoor units
R C
1 mm 1 mm
2
C
1 mm 1 mm
2 2
Y
1 mm
2 2
Indoor Unit
Y O
1 mm
2 2
Indoor Unit
R C
R C
8
Circuit
Breaker
Outdoor
Unit
W2 S
1 mm 1 mm
2 2
Y
Circuit
Breaker
Y
Outdoor
Unit
Main
Switch
Main
Switch