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Note 1: X terminal on PCB capped
24 VAC, return
R
24 VAC, common
B
Reversing valve (cooling mode)
O
Compressor contactor
Y
2nd stage heating circuit
W
Fan contactor circuit
G
System monitor LED
X
2311 Electronic Thermostat Conversion to:
®
York E1CS, E1FB, E1FH Heat Pump Systems
SC 231 1
Electronic Thermostat
W1
R
C
Y
W2
O/B
(capped)
E
G
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