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1F83-0471
Single Stage
3-wire
Zone Valve
application
Blower/Circulator
Fan Energized
Opens
Valve
(4)
Constant
24 Volt
(Com-
mon)
24 Volt
(Hot)
Cool
System
6 Y W C RC
CLASS II
TRANSFORMER
HOT
24VAC
NEUTRAL
120VAC
24 Volt
(Hot)
Heat
(5)
RH G
Jumper
Closes
Valve
(6)
3-Wire (SPDT) Heat Only Zone Valve Wiring
TYPICAL WIRING
AND CONFIGURATION
TYPICAL WIRING 1F83-0422/1F85-0422
Heat Pump 1
(HP1)
O
Energized in
Cool Mode
B
Energized in
Heat, Off,
Emergency
Mode
No
Output
Heat and
Cool Mode
1st Stage
(Compressor)
Blower/
Circulator
Fan Energized
on Call for
Heat or Cool.
Set Elect/Gas
Option for
Emergency
Mode
Heat Mode
2nd Stage.
Emergency
Mode 2nd
Stage
Emergency
Mode
1st Stage
Optional*
24 Volt
(Com-
mon)
Fault Indicator
or
System
Malfunction
Switch
24 Volt
(Hot)
Cool
System
Y W/E C L RC
CLASS II
TRANSFORMER
HOT
24VAC
NEUTRAL
120VAC
24 Volt
(Hot)
Heat
RH
Jumper
Y2 W2 G
Jumper
Comfort Alert II Module
or Similar System
Malfunction Module
O/B
Heat Pump Systems
NOTE: If your system
does not provide an
E connection, jumper
W2 to W/E to use the
Auxiliary Heat in the
Emergency Mode.
* Common connection
required for fault or
malfunction indication.
TYPICAL WIRING DIAGRAMS
149
TECHNICAL HELP