White Rodgers 37-6186B specifications Heat Pump Terminal Outputs, Thermostat Terminals Upper

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, W3) and cool (Y1); gas or electric backup.

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.

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.

THERMOSTAT TERMINALS (Upper)

L

PH

D

SA

SB

SC

O T

Malfunction Light

X-10 Module Input

Not Used

Remote Sense A

Remote Sense B

Remote Sense C

Outdoor Sensor

THERMOSTAT TERMINALS (Lower)

SYSTEM

E

C

R

W3/A1

W2

E2/P

W1

Y2

Y1

B

O

G

Single-stage compressor system; gas or electric backup

Heat mode 3rd

E2 - Emergency

Heat and cool

Energized in

Emergency

mode constant

Blower/Fan Energized

Heat Pump 1*

24 Volt

24 Volt

Emergency mode

stage.

Heat mode

No Output

modes 1st

Heat, Off,

Energized in

mode first

(Common)

(Hot)

3rd stage

Emergency mode

output.

2nd stage

stage

Emergency

Cool Mode

on call for Heat and

stage

P - All other modes

Cool

2nd stage.

constant output.

(compressor)

Mode

Multi-stage or two compressor system; gas or electric backup

E2 - Emergency

Heat and cool

Heat and cool

Energized in

Emergency

mode constant

Blower/Fan Energized

Heat Pump 2*

24 Volt

24 Volt

Emergency mode

Emergency mode

Heat mode

modes 2nd

modes 1st

Heat, Off,

Energized in

mode first

(Common)

(Hot)

3rd stage

2nd stage.

output.

3rd stage

stage

stage

Emergency

Cool Mode

on call for Heat and

stage

P - All other modes

Cool

(compressor 2)

(compressor 1)

Mode

constant output.

System requiring separate signals for heat (W1, W2) and cool (Y1); gas or electric backup

Heat mode 3rd

Heat mode 2nd

E2 - Emergency

Energized in

Emergency

mode constant

Blower/Fan Energized

Heat Pump 3**

24 Volt

24 Volt

stage.

stage.

Heat mode

No Output

Cool mode 1st

Heat, Off,

Energized in

mode first

(Common)

(Hot)

Emergency mode

Emergency mode

output.

1st stage

stage

Emergency

Cool Mode

on call for Heat and

stage

P - All other modes

Cool

3rd stage

2nd stage

constant output.

Mode

*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.

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