Wiring diagrams – White Rodgers 1F98EZ-1421 User Manual
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SYSTEM
R
RH
RC
C
W/E
W2
Y
Y2
G
O/B
L
Single
Stage
24 VAC
Power
24 VAC
Power
for Heating
24 VAC
Power
for Cooling 24 VAC
Common
Required
Heat
N/A
Cool
N/A
Fan
N/A
System
Monitor
Multi
Stage
24 VAC
Power
24 VAC
Power
24 VAC
Power
Heat
mode
1
st
stage
Heat
mode
2
nd
stage
Cool
mode
1
st
stage
Cool
mode
2
nd
stage
WIRING DIAGRAMS
CLASS II
Transformer
120 VAC
NEUTRAL
24 VAC
HOT
Fig. 2 - Typical Connection of a Single Stage or Multi-Stage System
*Factory installed jumper between RH and RC
SYSTEM
R
RH
RC
C
W/E W2
Y
Y2
G
O/B
L
Heat
Pump
24 VAC
Power
24 VAC
Power
for
Heating
24 VAC
Power
for
Cooling
24 VAC
Common
Required
Aux /
Em
1
st
stage
Aux /
Em
2
nd
stage
1
st
stage
Compressor
2
nd
stage
Compressor
Fan Changeover
Valve
System
Monitor
CLASS II
Transformer
120 VAC
NEUTRAL
24 VAC
HOT
Fig. 3 - Typical Connection of Heat Pump System up to 4 Stages Heat / 2 Stages Cool
*Factory installed jumper between RH and RC
SYSTEM
R
RH
RC
C
W/E W2
Y
Y2
G
O/B
L
Heat
Pump
24 VAC
Power
24 VAC
Power
for
Heating
24 VAC
Power
for
Cooling
24 VAC
Common
Required
Fossil
Fuel
1
st
stage
Fossil
Fuel
2
nd
stage
1
st
stage
Compressor
2
nd
stage
Compressor
Fan Changeover
Valve
System
Monitor
CLASS II
Transformer
120 VAC
NEUTRAL
24 VAC
HOT
Fig. 4 - Typical Connection of Heat Pump / Dual Fuel System up to 4 Stages Heat / 2 Stages Cool
*Factory installed jumper between RH and RC
*
*
*