White Rodgers 1F79-111 White-Rodgers 70 Series Heat Pump Thermostat Wiring diagram

White Rodgers Thermostats Wiring diagram - 1F79-111 White-Rodgers 70 Series Heat Pump Thermostat.
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1F72-151

1F79-111

CONFIGURATION AND

TERMINAL OUTPUTS

Reset Operation 1F72-151

Ifavoltagespikeorstaticdischargeblanksout

the display or causes erratic thermostat opera-

tion, you can reset the thermostat by pressing 

 and TIME at the same time.

Thermostat base

W905

Clip for

Slow Cycle

W904

Clip for

Celsius

Mounting

hole

W906 for Emergency

Heat Second Stage

Fan Control

O/B 

Terminal

Switches 

Selection

Mounting

hole

W903

W903

Clip to

Disable

EMR

Feature

L

R

E

24 VAC

120 VAC

Hot

SYSTEM

MONITOR

SWITCH

Neutral

THERMOSTAT

SYSTEM

G

W2

Typical wiring diagram for single transformer systems

TRANSFORMER

(Class II)

Changeover

Relay*

C

Y

O/B

Compressor

Contactor

* Changeover Relay is energized in COOL when O/B switch is in the “O” position

Changeover Relay is energized in HEAT when O/B switch is in the “B” position

Aux

Relay

(Stage 2)

Fan

Relay

Emergency

Relay

See Note **

** Jumper required to use a single Aux Heat for both Second Stage Heat and Emergency

L

R

E

24 VAC

120 VAC

Hot

SYSTEM

MONITOR

SWITCH

Neutral

THERMOSTAT

SYSTEM

G

W2

Typical wiring diagram for two transformer systems with NO safety circuits

TRANSFORMER

(Class II)

Changeover

Relay*

C

Y

O/B

Compressor

Contactor

* Changeover Relay is energized in COOL when O/B switch is in the “O” position

Changeover Relay is energized in HEAT when O/B switch is in the “B” position

Aux

Relay

(Stage 2)

Fan

Relay

Emergency

Relay

Limit or

Safety

Switches

TWO COMMONS MUST

BE JUMPERED TOGETHER!

HOT

NEUTRAL

120 VAC

24 VAC

CUT AND

TAPE OFF!

If safety circuits are in only one of the systems, remove 
the transformer of the system with 

NO safety circuits.

NOTE

** Jumper required to use a single Aux Heat for both Second Stage Heat and Emergency

See Note **

Reset Operation 1F79-111

Ifavoltagespikeorstaticdischargeblanksout

the display or causes erratic thermostat opera-

tion, you can reset the thermostat by pressing 

 and at the same time when system 

is switched from “OFF” to “HEAT” position.

1

(Factory Default)

to select:

2

OFF

4

Configuration Menu

3

CL

(OFF)

3 LO TO

3 HI

Set SYSTEM

switch to OFF

6

Move SYSTEM

switch from OFF

FA

(ON)

and

for at least 2 seconds

and

momentarily

and

momentarily

ON

0 HI

(0)

5*

OFF

and

momentarily

dL

(ON)

* Not available on earlier models

** Press HOLD to advance to next item or TIME to move backwards to previous item

Return to normal operation

1F79-111

Press Button(s)

Displayed

Press

or

1F72-151

Press Button(s)

PRGM

and 

RUN

1

3

2

5

4*

1F79-111

Step

1F72-151

Step

HOLD *

HOLD *

HOLD **

RUN

COMMENTS

Select Fast (on) or slow (off) Second 

Stage Heat
Select Compressor lockout OFF or ON

Select temperature display adjustment

higher or lower

Select display backlight OFF or ON

TECHNICAL

 HELP

www.white-rodgers.com

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