Carrier 42 HWS 07 Installation Manual page 11

42 HWS
Electrical connections
Terminal box legend, all models
Earth.
L Live power supply.
N Neutral power supply.
R Live connection indoor/outdoor unit.
C Neutral connection indoor/outdoor unit.
Y Compressor interlocking contact.
O Reversing valve control (heat pump only).
W2 Outdoor fan signal (heat pump only).
S1 Outdoor coil sensor (heat pump only).
S2 Outdoor coil sensor (heat pump only).
IMPORTANT: Use a separate bipolar wire to connect S1 and S2 terminals.
GB - 10
Cooling only
³ Indoor unit
· Outdoor unit
» Main switch
¿ Time-delay fuse or circuit breaker
(see outdoor unit installation manual)
Interconnecting wire, indoor-outdoor units (field wiring).
Mains supply connecting cable.
Only for sizes 07, 09 and 12 mains supply connection
can be made either to the indoor or the outdoor unit.
Heat pump