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R
Y1
O
BGE
W2
LC
Y2
APRILAIRE MODEL 8355 HEAT PUMP THERMOSTAT
R
Y
O
G
X2
W-U
B
WEATHERTRON LOW VOLTAGE TERMINAL BOARD
APRILAIRE MODEL 8355 HEAT PUMP THERMOSTAT CONVERSION
TO WEATHERTRON HEAT PUMPS
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
2ND. STAGE HEATING CIRCUIT
24 VAC, COMMON
NOTE 1: E AND W2 TERMINALS
JUMPERED AT THERMOSTAT
NOTE 2: X2 TERMINAL CAPPED AT
WEATHERTRON PCB
NOTE 3: T TERMINAL CAPPED AT
WEATHERTRON PCB
T
Field
Installed
Jumper
R
Y1
O
BGE
W2
LC
Y2
APRILAIRE MODEL 8355 HEAT PUMP THERMOSTAT
R
Y
O
G
B
YORK LOW VOLTAGE TERMINAL BOARD
APRILAIRE MODEL 8355 HEAT PUMP THERMOSTAT CONVERSION TO YORK
-E1CS, -E1FB, -E1FH 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
2ND. STAGE HEATING CIRCUIT
SYSTEM MONITOR LED
24 VAC, COMMON
NOTE 1: E AND W2 TERMINALS
JUMPERED AT THERMOSTAT
W
X
Field
Installed
Jumper