11
W
Y
G
B
O
RC
RH
C
4 WIRE HEATING AND COOLING SYSTEM
24 VOLT
SYSTEM
TRANSFORMER
120 VAC
AC
COMPRESSOR
FAN
HEAT
OPTIONAL
SYSTEM COMMON
RC-RH
JUMPER
PROVIDED
W
Y
G
B
O
RC
RH
C
5 WIRE SYSTEM HEATING AND COOLING - 2 TRANSFORMERS
24 VOLT
HEAT
TRANSFORMER
120 VAC
24 VOLT
COOL
TRANSFORMER
120 VAC
FAN
COOLING
HEAT
OPTIONAL
SYSTEM COMMON
RC-RH
JUMPER
REMOVED
W
Y
G
B*
O*
RC
RH
C
SINGLE STAGE HEAT PUMP SYSTEM
24 VOLT
SYSTEM
TRANSFORMER
120 VAC
CHANGEOVER
HEAT
CHANGEOVER
COOL
*"B" OR "O" BUT NEVER BOTH
FAN
HEAT
PUMP
ADD
JUMPER
SYSTEM COMMON
OPTIONAL
RC-RH
JUMPER
PROVIDED