80 Series Thermostat
Wiring Diagrams for 1F83-0422 & 1F85-0422
Single Stage, Multi-Stage, Heat Pump
Heat Pump Connections
If you do not have a heat pump system, refer to fi gures 2 & 3.
Refer to equipment manufacturers’ instructions for specifi c system
wiring information.
You can confi gure the thermostat for use with the following heat
pump systems.
Figure 1 – Heat Pump Systems
HEAT PUMP TYPE 1 (HP 1).
Single stage compressor system; gas
or electric backup.
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.
Single Stage and Multi-Stage Connections
Refer to equipment manufacturers’ instructions for specifi c system
wiring information.
This thermostat is designed to operate a single-transformer or two-
transformer system.
You can confi gure the thermostat for use with the following fossil fuel
systems:
SINGLE STAGE (SS 1)
gas, oil or electric.
MULTI-STAGE (MS 2)
gas, oil or electric.
After wiring, see INSTALLER CONFIGURATION section for proper
thermostat confi guration.
Figure 2 – Single Stage or Multi-Stage System (No Heat Pump) with Single Transformer
* Common connection
required for fault or
malfunction indication.
www.white-rodgers.com
PART NO. 37-6895B
Replaces 37-6895A
0825
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
Single
Stage 1
(SS1)
Multi-
Stage 2
(MS2)
O
Energized Constantly
in
Cool Mode
B
Energized Constantly
in Heat, Off,
Emergency
Mode
No
Output
Cool
Mode
2nd
Stage
Cool Mode
1st Stage
Blower/
Circulator
Fan Energized
on Call for
Cool (and
Heat if
configured
for Electric
Heat)
No Output
Heat Mode
2nd Stage
Heat
Mode
1st Stage
Optional*
24 Volt
(Com-
mon)
24 Volt
(Hot)
Cool
System
Y
G
W/E
C
L
RC
CLASS II
TRANSFORMER
HOT
24VAC
NEUTRAL
120VAC
24 Volt
(Hot)
Heat
RH
Y2
W2
Jumper
Fault
Indicator
or
System
Malfunction
Switch
Comfort Alert II Module
or Similar System
Malfunction Module
O/B
