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R
Y1
O
BGE
W2
LC
Y2
APRILAIRE MODEL 8355 HEAT PUMP THERMOSTAT
R
Y
O
G
E
W2
L
C
W3
CARRIER LOW VOLTAGE TERMINAL BOARD
APRILAIRE MODEL 8355 HEAT PUMP THERMOSTAT CONVERSION TO CARRIER
SPLIT SYSTEM CONDENSORS AND HEAT PUMP SYSTEMS
THE LOW VOLTAGE TERMINAL DESIGNATIONS AND THEIR DESCRIPTION AND/OR
FUNCTION ARE USED ON ALL SPLIT SYSTEM CONDENSORS AND HEAT PUMPS
24 VAC, RETURN
COMPRESSOR CONTACTOR
REVERSING VALVE [COOLING MODE]
FAN CONTACTOR CIRCUIT
EMERGENCY HEATING CIRCUIT
2ND. STAGE HEATING CIRCUIT
SYSTEM MONITOR LED
24 VAC, COMMON
R
Y1
O
BGE
W2
LC
Y2
APRILAIRE MODEL 8355 HEAT PUMP THERMOSTAT
R
Y
B
G
E
W2
L
X
O
COLEMAN LOW VOLTAGE TERMINAL BOARD
APRILAIRE MODEL 8355 HEAT PUMP THERMOSTAT CONVERSION TO
ROBERT SHAW 3000 SERIES HEAT PUMP SYSTEMS
THE LOW VOLTAGE TERMINAL DESIGNATIONS AND THEIR DESCRIPTION AND/OR
FUNCTION ARE USED ON ALL SPLIT SYSTEM CONDENSORS AND HEAT PUMPS
24 VAC, RETURN
COMPRESSOR CONTACTOR
REVERSING VALVE [HEATING MODE]
FAN CONTACTOR CIRCUIT
EMERGENCY HEATING CIRCUIT
2ND. STAGE HEATING CIRCUIT
SYSTEM MONITOR LED
24 VAC, COMMON
Wiring Diagrams
The following is just a sample of the most common types of HVAC systems.
Refer to your system’s installation manual for wiring information.