White Rodgers 1F72-151 Configuration And Terminal Outputs

1F72-151
1F79-111
W903
W903
Clip to
Disable
EMR
Feature
W904
Clip for
Celsius
1F79-111
1F72-151 1F79-111
Step Step
Press Button(s)
Set SYSTEM
1
switch to OFF
and
2 1
for at least 2 seconds
and
3 2
momentarily
and
4 3
momentarily
and
5* 4*
momentarily
Move SYSTEM
6 5
switch from OFF
* Not available on earlier models
** Press HOLD to advance to next item or TIME to move backwards to previous item
O/B
Changeover
Relay*
* 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
** Jumper required to use a single Aux Heat for both Second Stage Heat and Emergency
CUT AND
TAPE OFF!
Changeover
HOT
120 VAC 24 VAC
NEUTRAL
* 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
** Jumper required to use a single Aux Heat for both Second Stage Heat and Emergency
Typical wiring diagram for two transformer systems with NO safety circuits
88
Mounting
hole
W906 for Emergency
Heat Second Stage
Fan Control
W905
Clip for
Slow Cycle
Thermostat base

Configuration Menu

1F72-151
Press Button(s) (Factory Default)
PRGM
and RUN
HOLD *
HOLD *
HOLD **
RUN
Y G W2
See Note **
Fan
Aux
Compressor
Relay
Relay
Contactor
(Stage 2)

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.
O/B Y G
Fan
Relay* Relay
Compressor
Contactor
(Stage 2)
www.white-rodgers.com
CONFIGURATION AND
TERMINAL OUTPUTS

Reset Operation 1F72-151

If a voltage spike or static discharge blanks out
the display or causes erratic thermostat opera-
tion, you can reset the thermostat by pressing
,
O/B
Terminal

Reset Operation 1F79-111

Switches
Selection If a voltage spike or static discharge blanks out
the display or causes erratic thermostat opera-
tion, you can reset the thermostat by pressing
,
is switched from "OFF" to "HEAT" position.
Displayed
Press or
to select:
FA
Select Fast (on) or slow (off) Second
OFF
(ON)
Stage Heat
CL
ON Select Compressor lockout OFF or ON
(OFF)
0 HI Select temperature display adjustment
3 LO TO
(0) higher or lower
3 HI
dL
Select display backlight OFF or ON
OFF
(ON)
Return to normal operation
E C L
SYSTEM
MONITOR
Emergency
SWITCH
Relay
24 VAC
TRANSFORMER
(Class II)
W2 E C L
See Note **
SYSTEM
MONITOR
Emergency
SWITCH
Relay
Aux
Relay
TWO COMMONS MUST
BE JUMPERED TOGETHER!
and TIME at the same time.
and at the same time when system
COMMENTS
THERMOSTAT
R
SYSTEM
Hot
120 VAC
Neutral
THERMOSTAT
R
SYSTEM
Limit or
Safety
Switches
Hot
24 VAC
120 VAC
Neutral
TRANSFORMER
(Class II)