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NOTE: THE BLACK TERMINAL LETTERS ARE TYPICAL, GRAY TERMINAL LETTERS ARE BRAND SPECIFIC
CUSTOMER INSTALLED Y-W1 Jumper Wire
X
B*
C
W3
W
W2
O
F
G
Y1
6
Y
RC
V
R
W1 A W2O B CG Y RC RH
2-HEAT / 1-COOL, HEAT PUMP SYSTEM
WITH AUX AND EMERGENCY HEAT
Factory RH-RC Jumper Wire Installed
#8
FAN
SYSTEM 24V
TRANSFORMER
SYSTEM COMMON
5, 6 WIRES
HEAT PUMP
REVERSING
VALVE
** Use “O” or “B”
Terminals, Never Both
AUX / EMERG.
HEAT
O
P
T
I
O
N
A
L
16