HEAT PUMP TERMINAL OUTPUTS

THERMOSTAT TERMINALS (Upper)

 

 

 

 

 

 

 

 

 

 

L

 

 

PH

 

 

 

 

 

 

 

 

 

 

Malfunction Light

 

Not Used

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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 Pump 1*

Emergency

24 Volt

24 Volt

Not Used

Heat mode

E2=Emer-

Heat mode

No output

Heat and

Energized in

Energized in

Blower/Fan

 

mode

(Common)

(Hot)

 

 

3rd stage.

gency mode

2nd stage

 

Cool mode

Heat, Off

Cool mode

Energized on

 

1st stage

 

 

 

 

 

Emergency

constant

 

 

1st stage

Emergency

 

call for Heat

 

 

 

 

 

 

 

mode

output.

 

 

(compressor)

mode

 

and Cool

 

 

 

 

 

 

 

2nd stage

P=All other

 

 

 

 

 

 

 

 

 

 

 

 

 

 

modes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

constant

 

 

 

 

 

 

 

 

 

 

 

 

 

 

output

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

THERMOSTAT TERMINALS (Lower)

 

 

 

 

SYSTEM

E

 

C

R

W3/A1

W2

E2/P

W1

Y2

Y1

B

O

G

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

 

 

 

 

 

 

 

Heat Pump 2*

Emergency

24 Volt

24 Volt

Not Used

Emergency

E2=Emer-

Heat mode

Heat and

Heat and

Energized in

Energized in

Blower/Fan

 

mode

(Common)

(Hot)

 

 

mode

gency mode

3rd stage

Cool mode

Cool mode

Heat, Off

Cool mode

Energized on

 

1st stage

 

 

 

 

 

2nd stage

constant

 

2nd stage

1st stage

Emergency

 

call for Heat

 

 

 

 

 

 

 

 

output.

 

(compressor

(compressor

mode

 

and Cool

 

 

 

 

 

 

 

 

P=All other

 

2)

1)

 

 

 

 

 

 

 

 

 

 

 

modes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

constant

 

 

 

 

 

 

 

 

 

 

 

 

 

 

output

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

* If system does not provide connection to E, jumper W1 to E to provide Aux heating in emergency mode.

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Emerson 1F92 manual Malfunction Light Not Used