White Rodgers 1F72 Thermostat User Manual5441

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CONTENTS  
Installation Instructions for  
Preparations.................................................. 1  
Thermostat Details ........................................ 1  
Removing Old Thermostat ......................... 1-2  
Mounting and Wiring .................................. 2-3  
Check Thermostat Operation ..................... 4-5  
Programming your Thermostat .................. 6-7  
Specifications ................................................ 7  
Troubleshooting ......................................... 7-8  
Heating & Air Conditioning  
1F72  
5/2 Day Programmable  
Heat Pump Thermostat  
YOUR THERMOSTAT REPLACES  
PREPARATIONS  
1
Assemble tools required as shown below.  
Description  
Heat Pump (No Aux or Emergency Heat)  
Heat Pump (with Aux or Emergency Heat)  
Standard Heat & Cooling Systems  
Standard Heat Only Systems  
Yes  
Yes  
No  
No  
No  
No  
No  
No  
No  
No  
FLAT BLADE SCREWDRIVER  
WIRE CUTTER/STRIPPER  
HAND OR POWER  
DRILL WITH 3/16 INCH  
DRILL BIT, IF NEEDED  
Millivolt Heat Only Systems – Floor or Wall Furnaces  
Standard Central Air Conditioning  
Gas or Oil Heat  
SPIRIT LEVEL OR PLUMB BOB AND LINE OPTIONAL—  
THERMOSTAT DOES NOT NEED TO BE LEVEL TO WORK PROPERLY  
Electric Furnace  
Failure to follow and read all instructions carefully  
before installing or operating this control could cause  
personal injury and/or property damage.  
Hydronic (Hot Water) Zone Heat – 2 Wires  
Hydronic (Hot Water) Zone Heat – 3 Wires  
THERMOSTAT DETAILS  
REMOVING OLD THERMOSTAT  
2
3
CAUTION  
!
Mounting  
hole  
To prevent electrical shock and/or equipment damage,  
disconnect electrical power to the system at the main  
fuse or circuit breaker until installation is complete.  
Before removing wires from old thermostat’s switching subbase,  
label each wire with the terminal designation it was removed from.  
1. Remove Old Thermostat: A standard heat/cool thermostat  
consists of three basic parts:  
a. The cover, which may be either a snap-on or hinge type.  
b. The base, which is removed by loosening all captive screws.  
O/B  
c. The switching subbase, which is removed by unscrewing  
themountingscrewsthatholditonthewalloradaptorplate.  
Terminal  
Switches  
Selection  
2. Shut off electricity at the main fuse box until installation is  
complete. Ensure that electrical power is disconnected.  
3. Remove the front cover of the old thermostat. With wires still  
attached, removewallplatefromthewall.Iftheoldthermostat  
has a wall mounting plate, remove the thermostat and the wall  
mounting plate as an assembly.  
W906 for Emergency  
Heat Second Stage  
Fan Control  
W903  
Clip to  
Disable Celsius  
EMR  
W904  
Clip for  
Mounting  
hole  
W905  
Clip for  
Slow Cycle  
4. Identifyeachwireattachedtotheoldthermostatusingthe  
labels enclosed with the new thermostat.  
Feature  
Figure 1. Thermostat base  
5. Disconnectthewiresfromtheoldthermostatoneatatime.DO  
NOT LET WIRES FALL BACK INTO THE WALL.  
6. Install new thermostat using the following procedures.  
WHITE-RODGERS  
EMERSON ELECTRIC CO  
ST. LOUIS, MISSOURI  
PART NO. 37-6498A  
Printed in U.S.A.  
0342  
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O/B Terminal Switch Selection  
REMOVING OLD THERMOSTAT  
3
The O/B switch on this thermostat is factory set to “O” position.  
This will accommodate the majority of heat pump applications,  
which require the changeover relay to be energized in COOL. If  
the thermostat you are replacing or the heat pump being installed  
with this thermostat requires a “B” terminal, to energize the  
changeover relay in HEAT, the O/B switch must be moved to the  
“B” position.  
CONTINUED FROM FIRST PAGE  
ATTENTION! This product does not contain mercury. How-  
ever, this product may replace a unit which contains mercury.  
Do not open mercury cells. If a cell becomes damaged, do not  
touch any spilled mercury. Wearing non-absorbent gloves, take  
up the spilled mercury and place into a container which can be  
sealed. If a cell becomes damaged, the unit should be discarded.  
Mercury must not be discarded in household trash. When the unit  
this product is replacing is to be discarded, place in a suitable  
container and return to White-Rodgers at 2895 Harrison Street,  
Batesville, AR 72501-2117 for proper disposal.  
CAUTION  
Take care when securing and routing wires so they do  
not short to adjacent terminals or rear of thermostat.  
Personal injury and/or property damage may occur.  
!
MOUNTING AND WIRING  
Attach Thermostat Base to Wall  
4
1. Remove the packing material from the thermostat. Gently pull  
the cover straight off the base. Forcing or prying on the  
thermostat will cause damage to the unit.  
WARNING  
!
2. Connect wires beneath terminal screws on base using appro-  
priate wiring schematic (see figs. 2 through 4).  
Do not use on circuits exceeding specified voltage.  
Higher voltage will damage control and could cause  
shock or fire hazard.  
3. Placebaseoverholeinwallandmarkmountingholelocations  
on wall using base as a template.  
Do not short out terminals on gas valve or primary  
control to test. Short or incorrect wiring will damage  
thermostat and could cause personal injury and/or  
property damage.  
4. Move base out of the way. Drill mounting holes.  
5. Fasten base loosely to wall, as shown in fig. 1, using two  
mounting screws. Place a level against bottom of base, adjust  
until level, and then tighten screws. (Leveling is for appear-  
ance only and will not affect thermostat operation.) If you are  
using existing mounting holes, or if holes drilled are too large  
and do not allow you to tighten base snugly, use plastic screw  
anchors to secure subbase.  
Thermostat installation and all components of the sys-  
tem shall conform to Class II circuits per NEC code.  
Electric/Gas Jumper (Fan Option)  
Ifyouremergencyorauxiliarysystemwillenergizetheblower,then  
jumper W906 on the thermostat base must be cut (see fig. 1).  
6. Push excess wire into wall and plug hole with a fire-resistant  
material (such as fiberglass insulation) to prevent drafts from  
affecting thermostat operation.  
If your emergency or auxiliary heat system requires that the  
thermostat energize the fan circuit, do not cut jumper W906.  
Battery Location  
Thisthermostatdoesnotrequirebatteriestooperate.The2AAA”  
alkaline batteries are for the thermostat to remember the pro-  
gramming if AC voltage is lost. If the display shows BATT when  
AC power is not present, the batteries are low and should be  
replaced with fresh “AAA” Energizer® alkaline batteries. To re-  
place the batteries, install the batteries along the top of the base  
(see fig. 1). The batteries must be installed with the positive (+)  
ends to the right.  
If you are unsure of your application, contact a qualified service  
person.  
°F or °C Selection  
The factory default setting for temperature display is Fahrenheit.  
If you want the temperature in Celsius, clip jumper W904.  
Fast or Slow Cycle Selection  
The factory default setting is fast cycle, which cycles 1st stage at  
approximately 1.2°F and 2nd stage 0.75°F. If you prefer slow  
cycle, clip jump W905. The 1st stage and 2nd stage would be  
1.5°F and 1.2°F respectively.  
Energy Management Recovery (EMR)  
This thermostat is set to operate with EMR. This causes the  
thermostat to start the heating or cooling system early to have  
the room temperature reach the program setpoint at the time  
the period is to start.  
To disable EMR, clip jumper W903 (see Fig. 1).  
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MOUNTING AND WIRING  
CONTINUED FROM SECOND PAGE  
4
THERMOSTAT  
SYSTEM  
O/B  
Y
G
W2  
E
C
L
R
See Note **  
SYSTEM  
MONITOR  
SWITCH  
Changeover  
Relay*  
Fan  
Relay  
Emergency  
Relay  
Aux  
Relay  
Compressor  
Contactor  
(Stage 2)  
Hot  
24 VAC  
120 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  
TRANSFORMER  
(Class II)  
** Jumper required to use a single Aux Heat for both Second Stage Heat and Emergency  
Figure 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.  
THERMOSTAT  
SYSTEM  
O/B  
Y
G
W2  
E
C
L
R
CUT AND  
TAPE OFF!  
SYSTEM  
MONITOR  
SWITCH  
See Note **  
Changeover  
Relay*  
Fan  
Relay  
Limit or  
Safety  
Switches  
Emergency  
Relay  
HOT  
120 VAC  
NEUTRAL  
24 VAC  
Aux  
Relay  
(Stage 2)  
Compressor  
Contactor  
Hot  
24 VAC  
120 VAC  
Neutral  
TWO COMMONS MUST  
BE JUMPERED TOGETHER!  
TRANSFORMER  
(Class II)  
* 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  
Figure 3. Typical wiring diagram for two transformer systems with NO safety circuits  
NOTE  
Polarity must be observed. If the HOT side of the second transformer  
is jumpered to the COMMON side of the first transformer a short will  
be made. Damage to equipment will occur when power is restored.  
THERMOSTAT  
O/B  
Y
G
W2  
E
C
L
R
SYSTEM  
Limit or  
Safety  
Limit or  
Safety  
See Note **  
HOT  
Switches  
24 VAC  
120 VAC  
Switches  
SYSTEM  
MONITOR  
SWITCH  
Changeover  
Relay*  
Fan  
Relay  
NEUTRAL  
Emergency  
Relay  
24 VAC  
Auxiliary  
Heating  
NOTE  
ACCESSORY  
RELAY N.O.  
CONTACT  
Aux  
Relay  
(Stage 2)  
Transformer  
(Class II)  
The accessory relay scheme  
is required when safety  
circuits exist in both systems.  
Compressor  
Contactor  
COMMON  
TWO COMMONS MUST  
BE JUMPERED TOGETHER!  
Limit or  
Limit or  
Safety  
Switches  
Safety  
HOT  
Switches  
24 VAC  
120 VAC  
* 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  
COMMON  
NEUTRAL  
** Jumper required to use a single Aux Heat for both Second Stage Heat and Emergency  
Heat Pump Transformer  
(Class II)  
Figure 4. Typical wiring diagram for two transformer systems with safety circuits in BOTH systems  
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Cooling System  
1. Move SYSTEM switch to COOL position.  
CHECK THERMOSTAT OPERATION  
5
2. Press  
ture. The blower should come on immediately on high speed,  
followed by cold air circulation.  
3. Press to adjust temperature setting above room tem-  
to adjust thermostat setting below room tempera-  
NOTE  
To prevent static discharge problems, touch side of ther-  
mostattoreleasestaticbuild-upbeforetouchinganykeys.  
perature. The cooling system should stop operating.  
If at any time during testing your system does not operate  
properly, contact a qualified serviceperson.  
Before you begin programming your thermostat, you should be  
familiar with its features and with the display and the location and  
operation of the thermostat buttons. Your thermostat consists of  
two parts: the thermostat cover and the base. To remove the  
cover, gently pull it straight out from the base. To replace the  
cover, line up the cover with the base and press gently until the  
cover snaps onto the base.  
Fan Operation  
If your system does not have a G terminal connection, skip to  
Heating System.  
1. Turn on power to the system.  
2. Move fan switch to ON position. The blower should begin to  
operate.  
The Thermostat Buttons and Switches  
3. Move fan switch to AUTO position. The blower should stop  
1
2
3
4
5
6
7
8
immediately.  
(Up arrow) Raises temperature setting.  
(Down arrow) Lowers temperature setting.  
CAUTION  
!
TIME button.  
Do not allow the compressor to run unless the compres-  
sor oil heaters have been operational for 6 hours and the  
system has not been operational for at least 5 minutes.  
PRGM (program) button.  
RUN (program) button.  
HOLD button.  
Heating System  
FAN switch (ON, AUTO).  
SYSTEM switch (COOL, OFF, HEAT, EMER).  
1. Move SYSTEM switch to HEAT position. If the auxiliary  
heating system has a standing pilot, be sure to light it.  
2. Press  
to adjust thermostat setting to 1° above room  
The Display  
Indicates day of the week.  
temperature. The heat pump system should begin to operate.  
However, if the Flame icon ( ) and Snowflake icon ( ) are  
flashing, the compressor lockout feature is operating (see  
Configuration menu, item 2.)  
9
Indicates a malfunction with the system.  
10  
11  
3. Adjusttemperaturesettingto4° aboveroomtemperature.The  
auxiliary heat system should begin to operate and the Flame  
icon ( ) will be flashing.  
Flame icon ( ) is displayed when the SYSTEM switch is in  
theHEATposition.Flameicon( )isdisplayedflashingwhen  
2nd-stage heat (Aux or Emergency) is energized. Snow-  
flakeicon( )isdisplayed(non-flashing)whentheSYSTEM  
switch is in the COOL position. Snowflake and Flame icon  
willbedisplayed(flashing)ifthethermostatisinlockoutmode  
to prevent the compressor from cycling too quickly.  
4. Press  
to adjust thermostat setting below room tempera-  
ture. The heating system should stop operating.  
Emergency System  
EMER bypasses the Heat Pump to use the heat source wired  
to terminal E on the thermostat. EMER is typically used when  
compressor operation is not desired, or you prefer back-up  
heat only.  
1. Move SYSTEM switch to EMER position. EMER will flash on  
the display.  
2. Press  
toadjustthermostatsettingaboveroomtempera-  
ture. The Aux heating system will begin to operate. The  
Flame icon ( ) will display flashing to indicate that the Aux  
system is operating.  
3. Press  
to adjust the thermostat below room temperature.  
The Aux heating system should stop operating.  
CAUTION  
!
To prevent compressor and/or property damage, if the  
outdoor temperature is below 50°F, DO NOT operate the  
cooling system  
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3. Select Temperature Display Adjustment 3 LO to 3 HI –  
Allows you to adjust the room temperature display up to 3°  
higher or lower. Your thermostat was accurately calibrated at  
the factory but you have the option to change the display  
temperature to match your previous thermostat. The current  
or adjusted room temperature will be displayed on the left side  
of the display.  
CHECK THERMOSTAT OPERATION  
5
CONTINUED FROM FOURTH PAGE  
12  
EMER is displayed flashing when the system switch is in  
EMER position.  
13  
14  
Alternately displays current time and temperature.  
4. SelectBacklitDisplay(Notavailableonearliermodels)The  
display backlight improves display contrast in low lighting  
conditions. Selecting backlight ON will keep the light on  
The word HOLD is displayed when the thermostat is in the  
HOLD mode.  
continuously. Selecting Backlight OFF will keep the light off.  
15  
16  
Displayscurrentlyprogrammedsettemperature(thisisblank  
when SYSTEM switch is in the OFF position).  
Operating Features  
Now that you are familiar with the thermostat buttons and display,  
read the following information to learn about the many features of  
the thermostat.  
“BATT” is displayed when 2 “AAA” batteries are low and  
should be replaced.  
SIMULTANEOUSHEATING/COOLINGPROGRAMSTOR-  
AGEWhenprogramming, youcanenterbothyourheating  
and cooling programs at the same time. There is no need to  
reprogram the thermostat at the beginning of each season.  
Configuration Menu  
The configuration menu allows you to set certain thermostat  
operating characteristics to your system or personal requirements.  
Press RUN to make sure the thermostat is in the run program  
mode, then press PRGM and RUN at the same time to enter the  
configuration menu. The display will show the first item in the  
configuration menu.  
TEMPERATUREOVERRIDEPress  
or  
untilthe  
display shows the temperature you want. The thermostat will  
override current programming and keep the room tempera-  
tureattheselectedtemperatureuntilthenextprogramperiod  
begins. Then the thermostat will automatically revert to the  
program.  
The configuration menu chart summarizes the configuration  
options. An explanation of each option follows.  
Press HOLD to change to the next menu item or press TIME to go  
backwards to the previous item in the menu. To exit the menu and  
return to the program operation, press RUN. If no keys are  
pressed within fifteen minutes, the thermostat will revert to  
normal operation.  
HOLD TEMPERATURE — The thermostat can hold any  
temperature within its range for an indefinite period, without  
reverting to the programmed temperature. Press HOLD  
button. HOLD will be displayed. Then choose the desired  
temperature by pressing  
or  
. The thermostat will  
hold the room temperature at the selected setting until you  
press the RUN button to start program operation again.  
1. In the run mode, if the setpoint temperature is manually raised  
by 3°F (2°C) or more above the actual temperature with the  
TEMPERATURE UP key, and the fast second stage feature is  
enabled, FA on, the second stage will energize immediately.  
With FA off, second stage will not energize until the setpoint  
temperatureis1°Formoreaboveactualtemperatureformore  
than ten minutes.  
ENERGYMANAGEMENTRECOVERYEnergyManage-  
mentRecovery(EMR)causesthethermostattostartheating  
or cooling early to make the building temperature reach the  
program setpoint at the time you specify. Heating will start 5  
minutes early for every 1° of temperature required to reach  
setpoint.  
2. Select Compressor Lockout CL OFF or ON – Selecting CL  
ON will cause the thermostat to wait 5 minutes before turning  
on the compressor if the heating and cooling system loses  
power. It will also wait 5 minutes minimum between cooling  
and heating cycles. This is intended to help protect the  
compressor from short cycling. Some newer compressors  
already have a time delay built in and do not require this  
feature. Your compressor manufacturer can tell you if the  
lockout feature is already present in their system. When the  
thermostat compressor time delay occurs it will flash the  
Snowflake and Flame icons for about five minutes.  
Example: You select EMR and have your heating pro-  
grammed to 65° at night and 70° at 7 AM. If the building  
temperature is 65° the difference between 65° and 70° is 5°.  
Allowing 5 minutes per degree the thermostat setpoint will  
change to 70° at 6:35 AM. Cooling allows more time per  
degree because it takes longer to reach temperature.  
°F/°C CONVERTIBILITY — The factory default setting is  
Fahrenheit. Clipping W904 jumper on the circuit board (see  
fig. 1) will alter this feature to Celsius temperature setting.  
Configuration Menu  
Step  
1
Press Button(s)  
Displayed (Factory Default) Press  
or  
to select:  
COMMENTS  
PRGM  
and RUN  
FA  
(on)  
OFF  
Select Fast (on) or slow (off) Second Stage Heat  
CL  
(OFF)  
Select Compressor lockout OFF or ON  
ON  
HOLD*  
HOLD*  
2
3 LO TO  
3 HI  
0 HI  
(0)  
Select temperature display adjustment higher or lower  
3
dL  
(ON)  
Select display backlight OFF or ON  
Returns to normal operation  
OFF  
HOLD**  
RUN  
4*  
5
* Not available on earlier models  
** Press HOLD to advance to next item or TIME to move backwards to previous item  
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3. Press TIME once. The display window will show the minutes  
only.  
PROGRAMMINGYOUR THERMOSTAT  
6
This section will help you plan your thermostat’s program to meet  
your needs. For maximum comfort and efficiency, keep the  
following guidelines in mind when planning your program.  
• When heating (cooling) your building, program the tempera-  
tures to be cooler (warmer) when the building is vacant or  
during periods of low activity.  
EXAMPLE:  
4. Press and hold either  
minutes.  
or  
until you reach the correct  
5. Press TIME once. The display will show the day of the week.  
6. Press or untilyoureachthecurrentdayoftheweek.  
• During early morning hours, the need for cooling is usually  
minimal.  
7. Press RUN once. The display will show the correct time and  
room temperature alternately.  
Look at the factory preprogrammed times and temperatures shown  
below. If this program will suit your needs, simply press the RUN  
button to begin running the factory preset program.  
If you want to change the preprogrammed times and tempera-  
tures, follow these steps.  
Enter Heating Program  
1. Move the SYSTEM switch to HEAT.  
2. Press PRGM once. “MO TU WE TH FR” (indicating weekday  
program) will appear in the display. Also displayed are the  
currently programmed start time for the 1st heating period and  
the currently programmed temperature (flashing).  
Determine the time periods and temperatures for your weekday  
and weekend programs. You must program four periods for both  
the weekday and weekend program. However, you may use the  
same heating and cooling temperatures for consecutive time  
periods. You can choose start times, heating temperatures, and  
cooling temperatures independently for both weekday and week-  
end programs (for example, you may select 5:00 AM and 70° as  
the weekday 1st period heating start time and temperature, and  
also choose 7:00 AM and 76° as the weekday1st period cooling  
start time and temperature). Use the table at the bottom of the  
pagetoplanyourprogramtimeperiodsandthetemperaturesyou  
want during each period. You may also want to look at the sample  
program table to get an idea of how the thermostat can be  
programmed.  
MO TU WE TH FR  
AM  
EXAMPLE:  
This display window shows that for the 1st weekday period,  
the start time is 6:00 AM, and 70° is the programmed tempera-  
ture (this example reflects factory preprogramming).  
3. Press  
or  
to change the displayed temperature to  
your selected temperature for the 1st heating program period.  
4. Press TIME once (the programmed time will flash). Press  
or  
until your selected time appears. The time will  
Entering Your Program  
change in 15 minute increments. When your selected time is  
displayed, press TIME again to return to the change tempera-  
ture mode.  
Follow these steps to enter the heating and cooling programs you  
have selected.  
5. Press PRGM once. The currently programmed start time and  
setpoint temperature for the 2nd heating program period will  
appear.  
Set Current Time and Day  
1. Press TIME button once. The display will show the hour only.  
6. Repeat steps 4 and 5 to select the start time and heating  
temperature for the 2nd heating program period.  
PM  
EXAMPLE:  
7. Repeat steps 4 through 6 for the 3rd and 4th heating program  
periods. Weekday heating programs are now complete.  
2. Press and hold either  
or  
until you reach the correct  
8. Press PRGM once. “SA SU” (indicating weekend program)  
will appear in the display, along with the start time for the 1st  
heating period and the currently programmed temperature.  
hour and AM/PM designation (AM begins at midnight; PM  
begins at noon).  
SAMPLE  
Heating/Cooling Schedule Plan  
Heating/Cooling Schedule Plan (Factory Program)  
WEEKEND (2 DAY)  
WEEKEND (2 DAY)  
WEEKDAY (5 DAY)  
WEEKDAY (5 DAY)  
Start  
Start  
Start  
Start  
Period  
Time  
Temperature  
70 F  
Time  
Temperature  
70 F  
Period  
Time  
Temperature  
Time  
Temperature  
1ST  
1ST  
6:00 AM  
6:00 AM  
2ND  
3RD  
4TH  
1ST  
2ND  
3RD  
4TH  
2ND  
3RD  
4TH  
1ST  
2ND  
3RD  
4TH  
8:00 AM  
5:00 PM  
10:00 PM  
6:00 AM  
8:00 AM  
5:00 PM  
10:00 PM  
62 F  
70 F  
62 F  
78 F  
85 F  
78 F  
82 F  
8:00 AM  
5:00 PM  
10:00 PM  
6:00 AM  
8:00 AM  
5:00 PM  
10:00 PM  
62 F  
70 F  
62 F  
78 F  
85 F  
78 F  
82 F  
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Check Your Programming  
6
PROGRAMMINGYOUR THERMOSTAT  
Follow these steps to check your thermostat programming one  
final time before beginning thermostat operation.  
1. Move SYSTEM switch to HEAT position.  
CONTINUED FROM SIXTH PAGE  
9. Repeat steps 4 through 8 to complete weekend heating  
programming.  
2. Press PRGM to view the 1st weekday heating period time and  
temperature. Each time you press PRGM, the next heating  
period time and temperature will be displayed in sequence for  
weekday, then weekend program periods (you may change  
any time or temperature during this procedure).  
10.When you have completed entering your heating program,  
press RUN.  
Enter Cooling Program  
3. Press RUN.  
Iftheoutsidetemperatureisbelow50°F, disconnectpowerto  
the cooling system before programming. Energizing the air  
conditioner compressor during cold weather may cause  
personal injury or property damage.  
4. Move SYSTEM switch to COOL position.  
5. Repeat step 2 to check cooling temperatures.  
6. Press RUN to begin program operation.  
1. Move SYSTEM switch to COOL position.  
YOURTHERMOSTATISNOWCOMPLETELYPROGRAMMED  
AND READY TO AUTOMATICALLY PROVIDE MAXIMUM  
COMFORT AND EFFICIENCY!  
2. Followtheprocedureforenteringyourheatingprogram, using  
your selected cooling times and temperatures.  
SPECIFICATIONS  
7
ELECTRICAL DATA  
THERMAL DATA  
Electrical Rating:  
Setpoint Temperature Range:  
45°F to 90°F (7°C to 32°C)  
Operating Ambient Temperature Range:  
32°F to 105°F  
20 to 30 VAC 50/60 Hz.  
0.05 to 1.0 Amps (Load per terminal)  
1.5 Amps Maximum Total Load (All terminals combined)  
Operating Humidity Range:  
0 to 90% RH (non-condensing)  
Shipping Temperature Range:  
-40°F to 150°F  
TROUBLESHOOTING  
8
Reset Operation  
reset and still does not function correctly contact your heating/  
cooling service person or place of purchase.  
If a voltage spike or static discharge blanks out the display or  
causes erratic thermostat operation you can reset the thermostat  
Batteries  
by pressing  
,
and TIME at the same time. This also  
For optimum performance, we recommend replacing batteries  
resets the factory defaults. If the thermostat has power, has been  
®
once a year with fresh “AAA” Energizer alkaline batteries.  
Symptom  
Possible Cause  
Corrective Action  
No Heat/No Cool/No Fan  
(common problems)  
1. Blown fuse or tripped circuit breaker.  
2. Furnace power switch to OFF.  
Replace fuse or reset breaker.  
Turn switch to ON.  
3. Furnace blower compartment door or  
panel loose or not properly installed.  
Replace door panel in proper position to engage  
safety interlock or door switch.  
No Heat  
1. Pilot light not lit.  
Re-light pilot.  
2. System Switch not set to HEAT.  
Set System Switch to HEAT and raise setpoint  
above room temperature.  
3. Loose connection to thermostat or system.  
Verify thermostat and system wires are securely  
attached.  
4. Furnace Lock-Out Condition. Heat may also  
be intermittent.  
Many furnaces have safety devices that shut  
down when a lock-out condition occurs. If the  
heat works intermittently contact the furnace  
manufacturer or local service person for  
assistance.  
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TROUBLESHOOTING  
CONTINUED FROM SEVENTH PAGE  
8
Symptom  
Possible Cause  
Corrective Action  
No Heat (continued)  
5. Heating system requires service or  
thermostat requires replacement.  
Diagnostic: Set System Switch to HEAT and raise  
the setpoint above room temperature. Within a few  
seconds the thermostat should make a soft click  
sound. This sound usually indicates the thermo-  
stat is operating properly. If the thermostat does  
not click, try the reset operation listed above. If the  
thermostat does not click after being reset contact  
your heating and cooling service person or place  
of purchase for a replacement. If the thermostat  
clicks, contact the furnace manufacturer or a  
service person to verify the heating is operating  
correctly.  
No Cool  
1. System Switch not set to COOL.  
Set System Switch to COOL and lower setpoint  
below room temperature.  
2. Loose connection to thermostat or system.  
Verify thermostat and system wires are securely  
attached.  
3. Cooling system requires service or  
thermostat requires replacement.  
Same procedure as diagnostic for No Heat  
condition except set the thermostat to COOL and  
lower the setpoint below the room temperature.  
There may be up to a five minute delay before the  
thermostat clicks in Cooling.  
Heat, Cool or Fan Runs Constantly.  
1. Possible short in wiring.  
Check each wire connection to verify they are not  
shorted or touching together. No bare wire should  
stick out from under terminal screws. Try resetting  
the thermostat as described above. If the condition  
persists the manufacturer of your system or  
2. Possible short in thermostat.  
3. Possible short in heat/cool/fan system.  
4. Fan Switch set to Fan On.  
service person can instruct you on how to test the  
Heat/Cool system for correct operation. If the  
system operates correctly, replace the thermostat.  
Furnace (Air Conditioning) Cycles Too Fast  
or Too Slow (narrow or wide temperature  
swing)  
1. The location of the thermostat and/or the  
size of the Heating (Cooling) System may  
be influencing the cycle rate.  
Digital thermostats normally provide precise  
temperature control and may cycle faster than  
some older mechanical models. A faster cycle  
rate means the unit turns on and off more  
frequently but runs for a shorter time so there is  
no increase in energy use. If you would like to  
increase the cycle time, clip Jumper W-905 as  
mentioned in the instructions for Hydronic Heating  
Systems. It is not possible to shorten the cycle  
time. If an acceptable cycle rate is not achieved as  
received or by clipping W-905 contact a local  
service person for additional suggestions.  
Thermostat Setting and Thermostat  
Thermometer Disagree  
1. Thermostat thermometer setting requires  
adjustment.  
The thermometer can be adjusted +/- 3 degrees.  
See Temperature Display Adjustment in the  
Operation section.  
Thermostat Does Not Follow Program  
1. AM or PM set incorrectly in program.  
2. AM or PM set incorrectly on the clock.  
3. Voltage spike or static discharge.  
Check current clock and program settings  
including the AM or PM designations for each  
time period. If a voltage spike or a static discharge  
occurs use the Reset Operation listed above.  
Blank Display and/or Keypad  
Not Responding  
1. Voltage spike or static discharge.  
Use the Reset Operation listed above.  

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