TECHNICAL HELP
1F72-151 |
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CONFIGURATION AND |
1F79-111 |
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TERMINAL OUTPUTS |
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Mounting
hole
W903
Clip to 
W903
Disable
EMR
Feature
Mounting |
W904 |
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Clip for |
W905 |
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hole |
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Celsius |
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Clip for |
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Slow Cycle |
O/B
Terminal
Switches
Selection
W906 for Emergency Heat Second Stage
Fan Control
Reset Operation 1F72-151
If a voltage spike or static discharge blanks out the display or causes erratic thermostat operation, you can reset the thermostat by pressing 
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and TIME at the same time.
Reset Operation 1F79-111
If a voltage spike or static discharge blanks out the display or causes erratic thermostat operation, you can reset the thermostat by pressing 
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and at the same time when system
is switched from “OFF” to “HEAT” position.
Thermostat base
Configuration Menu
1F79-111 1F72-151 |
1F79-111 |
1F72-151 |
Displayed |
Press |
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Step |
Step |
Press Button(s) |
Press Button(s) |
(Factory Default) |
to select: |
COMMENTS |
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1Set SYSTEM switch to OFF
2 |
1 |
and |
PRGM |
FA |
OFF |
Select Fast (on) or slow (off) Second |
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for at least 2 seconds |
and RUN |
(ON) |
Stage Heat |
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3 |
2 |
and |
HOLD * |
CL |
ON |
Select Compressor lockout OFF or ON |
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momentarily |
(OFF) |
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4 |
3 |
and |
HOLD * |
0 HI |
3 LO TO |
Select temperature display adjustment |
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momentarily |
(0) |
3 HI |
higher or lower |
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5* |
4* |
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HOLD ** |
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OFF |
Select display backlight OFF or ON |
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momentarily |
(ON) |
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6 |
5 |
Move SYSTEM |
RUN |
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Return to normal operation |
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switch from OFF |
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*Not available on earlier models
**Press HOLD to advance to next item or TIME to move backwards to previous item
THERMOSTAT
O/B |
Y |
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G |
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W2 |
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E |
C |
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L |
R |
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See Note ** |
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SYSTEM |
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SYSTEM |
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Changeover |
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Fan |
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MONITOR |
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Emergency |
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Relay* |
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Compressor |
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Relay |
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Aux |
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Relay |
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SWITCH |
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Relay |
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Contactor |
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(Stage 2) |
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24 VAC |
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Hot |
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120 VAC |
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* Changeover Relay is energized in COOL when O/B switch is in the “O” position |
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Neutral |
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TRANSFORMER |
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Changeover Relay is energized in HEAT when O/B switch is in the “B” position |
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(Class II) |
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** Jumper required to use a single Aux Heat for both Second Stage Heat and Emergency |
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Typical wiring diagram for single transformer systems
NOTE
If safety circuits are in only one of the systems, remove the transformer of the system with NO safety circuits.
CUT AND |
O/B |
Y |
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G |
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W2 |
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E |
C |
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L |
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TAPE OFF! |
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See Note ** |
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SYSTEM |
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Changeover |
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Fan |
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MONITOR |
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Emergency |
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HOT |
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Relay* |
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Relay |
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SWITCH |
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Relay |
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120 VAC |
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24 VAC |
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Compressor |
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Aux |
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Relay |
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Contactor |
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NEUTRAL |
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(Stage 2) |
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TWO COMMONS MUST |
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* Changeover Relay is energized in COOL when O/B switch is in the “O” position |
BE JUMPERED TOGETHER! |
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Changeover Relay is energized in HEAT when O/B switch is in the “B” position |
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** Jumper required to use a single Aux Heat for both Second Stage Heat and Emergency |
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THERMOSTAT
R
SYSTEM
Limit or
Safety
Switches
Hot
24 VAC 120 VAC
Neutral
TRANSFORMER
(Class II)
Typical wiring diagram for two transformer systems with NO safety circuits
188 |
www.white-rodgers.com |
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