Heat Pump Terminal Outputs - White Rodgers 90 SERIES Installation & Configuration Manual

MULTI-STAGE TERMINAL OUTPUTS
Refer to equipment manufacturers' instruc-
tions for specific system wiring information.
You can configure the thermostat for use
with either multi-stage electric heat systems
or multi-stage gas systems. When configured
for electric heat, the G terminal (blower/fan)
will be energized on a call for heat.
THERMOSTAT TERMINALS (Upper)
L PH D
Malfunction Light X-10 Module Input Not Used
SYSTEM
E C
24 Volt
Multi-Stage No Function
(Common)

HEAT PUMP TERMINAL OUTPUTS

Refer to equipment manufacturers' instruc-
tions for specific system wiring information.
You can configure the thermostat for use
with the following heat pump system types:
HEAT PUMP TYPE 1. Single-stage
compressor system; gas or electric backup.
HEAT PUMP TYPE 2. Multi-stage or two-
compressor system; gas or electric backup.
HEAT PUMP TYPE 3. System requiring
separate signals for heat (W1, W2) and cool
(Y1); gas or electric backup.
THERMOSTAT TERMINALS (Upper)
L PH D
Malfunction Light X-10 Module Input Not Used
SYSTEM
E C
Single-stage compressor system; gas or electric backup
Heat mode
1st stage.
24 Volt
Heat Pump 1* Emergency
(Common)
mode 1st
stage.
Multi-stage or two compressor system; gas or electric backup
Emergency
24 Volt
Heat Pump 2* mode 1st
(Common)
stage
System requiring separate signals for heat (W1, W2) and cool (Y1); gas or electric backup
Emergency
24 Volt
Heat Pump 3** mode 1st
(Common)
stage
* If system does not provide connection to E, jumper W1 to E to provide Aux heating in emergency mode.
** If system does not provide connection to E, jumper W2 to E to provide Aux heating in emergency mode.
This thermostat is designed to operate a
single-transformer system. If you have a two-
transformer system, cut and tape off one
transformer. If transformer safety circuits are
in only one of the systems, remove the
transformer of the system with NO safety
circuits. If required, replace remaining
transformer with a 75VA Class II transformer.
After disconnecting one transformer, the two
commons must be jumpered together.
SA SB
Remote Sense A Remote Sense B
THERMOSTAT TERMINALS (Lower)
R W3/A1 W2
Damper terminal
24 Volt Heat mode 2nd
energized in
(Hot) stage
occupied mode
This thermostat is designed to operate a
single-transformer system. If you have a two-
transformer system, cut and tape off one
transformer. If transformer safety circuits are
in only one of the systems, remove the
transformer of the system with NO safety
circuits. If required, replace remaining
transformer with a 75VA Class II transformer.
After disconnecting one transformer, the two
commons must be jumpered together.
SA SB
Remote Sense A Remote Sense B
THERMOSTAT TERMINALS (Lower)
R W3/A1 W2
Heat mode 3rd
Damper terminal
24 Volt stage.
energized in
(Hot) Emergency mode
occupied mode
2nd stage
Damper terminal
24 Volt Emergency mode
energized in
(Hot) 2nd stage
occupied mode
Heat mode 2nd
Damper terminal
24 Volt stage.
energized in
(Hot) Emergency mode
occupied mode
2nd stage.
SC O T
Remote Sense C Outdoor Sensor
E2/P W1 Y2
Heat mode Cool mode
No function
1st stage 2nd stage
SC O T
Remote Sense C Outdoor Sensor
E2/P W1 Y2
E2 - Emergency
mode constant
Heat mode
output. No Output
2nd stage
P - All other modes
constant output.
E2 - Emergency
Heat and cool
mode constant
Heat mode modes 2nd
output.
3rd stage stage
P - All other modes
(compressor 2)
constant output.
E2 - Emergency
mode constant
Heat mode
output. No Output
1st stage
P - All other modes
constant output.
3
Use the terminal output information below to
help you wire the thermostat properly for
your multi-stage system. After wiring, see
CONFIGURATION section for proper
thermostat configuration.
Y1 B O
Energized in
Cool mode Energized in
Heat and Off
1st stage Cool Mode
Mode
Use the terminal output information below to
help you wire the thermostat properly for
your heat pump system type. After wiring,
see CONFIGURATION section for proper
thermostat configuration.
Y1 B O
Heat and cool Energized in
modes 1st Heat, Off, Energized in
stage Emergency Cool Mode
(compressor) Mode
Heat and cool Energized in
modes 1st Heat, Off, Energized in
stage Emergency Cool Mode
(compressor 1) Mode
Energized in
Cool mode Heat, Off, Energized in
1st stage Emergency Cool Mode
Mode
G
Blower/Fan Energized
on call for Cool (and
Heat if confgured to
Electric Heat).
G
Blower/Fan Energized
on call for Heat and
Cool
Blower/Fan Energized
on call for Heat and
Cool
Blower/Fan Energized
on call for Heat and
Cool