White Rodgers 1F81 71 Thermostat User Manual

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1F81-71  
Programmable Electronic  
Digital Automatic Changeover Multi-stage Thermostat  
INSTALLATION AND  
WHITE-RODGERS  
OPERATION INSTRUCTIONS  
Operator: Save these instructions for future use!  
FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY  
BEFORE INSTALLING OR OPERATING THIS CONTROL COULD CAUSE  
PERSONAL INJURY AND/OR PROPERTY DAMAGE.  
DESCRIPTION  
Your new White-Rodgers 5-Day/2-Day Digital Multi-stage Ther-  
mostat uses the technology of a solid-state microcomputer to  
provideprecisetime/temperaturecontrol.Thisthermostatoffers  
you the flexibility to design heating and cooling programs that fit  
your needs.  
• Optional B and O terminals  
• Preprogrammed temperature control  
• LCD continuously displays set point, and alternately dis-  
plays time and room temperature  
• Temperature override until next program period  
• Manual program override (HOLD temperature)  
• °F/°C convertibility  
Features:  
• Separate 5-day (weekday) and 2-day (weekend) programming  
with four separate time/temperature periods per program  
• Simultaneous heat and cool program storage  
• Optional C terminal (dual power option)  
• Temperature range 45° to 90°F  
• Two-stage heat/two-stage cool  
• Armchair programming capability  
• Optional Energy Management Recovery (EMR)  
PRECAUTIONS  
CAUTION  
Thisthermostatisintendedforusewitha24-voltsystem;donot  
use this thermostat with a millivolt or line voltage system. If in  
doubt about whether your wiring is millivolt, line, or low voltage,  
have it inspected by a qualified heating and air conditioning  
contractor or electrician.  
!
To prevent electrical shock and/or equipment damage  
disconnect electric power to system at main fuse or  
circuit breaker box until installation is complete.  
Do not exceed the specification ratings.  
WARNING  
!
Allwiringmustconformtolocalandnationalelectricalcodesand  
ordinances.  
Do not use on circuits exceeding specified voltage.  
Higher voltage will damage control and could cause  
shock or fire hazard.  
This control is a precision instrument, and should be handled  
carefully. Roughhandlingordistortingcomponentscouldcause  
the control to malfunction.  
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.  
SPECIFICATIONS  
ELECTRICAL DATA  
APPLICATIONS  
Electrical Rating:  
For use with:  
20 to 30 VAC 50/60 Hz. or D.C.  
0.05 to 1.5 Amps (Load per terminal)  
2.5 Amps Maximum Total Load (All terminals combined)  
• Heat/cool systems with up to two stages heat, two  
stages cool  
DO NOT USE WITH:  
THERMAL DATA  
• Millivolt systems  
Setpoint Temperature Range:  
45°F to 90°F (7°C to 32°C)  
• Systems exceeding 30 VAC and 2.5 amps  
• 3-wire zoned hydronic heating systems  
Operating Ambient Temperature Range:  
32°F to 105°F  
Operating Humidity Range:  
0 to 90% RH (non-condensing)  
Shipping Temperature Range:  
-40°F to 150°F  
WHITE-RODGERS DIVISION  
EMERSON ELECTRIC CO.  
9797 REAVIS ROAD  
PART NO. 37-5938B  
Printed in U.S.A.  
Replaces 37-5938A  
9912  
ST. LOUIS, MISSOURI 63123-5398  
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INSTALLATION  
REMOVE OLD THERMOSTAT  
1. Shut off electricity at the main fuse box until installation is  
complete. Ensure that electrical power is disconnected.  
2. Remove the front cover of the old thermostat. With wires  
still attached, remove wall plate from the wall. If the old  
thermostathasawallmountingplate,removethethermostat  
and the wall mounting plate as an assembly.  
W903  
3. Identifyeachwireattachedtotheoldthermostatusingthe  
CUT TO  
DEFEAT EMR  
labels enclosed with the new thermostat.  
4. Disconnect the wires from old thermostat one at a time. DO  
GAS ELECTRIC  
W905  
NOT LET WIRES FALL BACK INTO THE WALL.  
CUT FOR  
LONGER  
CYCLES  
5. Install new thermostat using the following procedures.  
PRE-INSTALLATION SET-UP  
Figure 1. Back of thermostat base  
1. Remove the packing material from the thermostat.  
Alkaline batteries (3 “AA”–  
install “+” ends to the left)  
2. This thermostat is configured from the factory to operate a  
heat/cool, fossil fuel (gas, oil, etc.), forced air system with up  
to 2 stages of heat and 2 stages of cool. It is configured  
correctly for any system that DOES NOT require the thermo-  
stat to energize the fan on a call for heat.  
Screw anchors  
If your system is an electric heat or heat-pump system that  
REQUIRES the thermostat to turn on the fan on a call for  
heat, locate the GAS/ELECTRIC switch on the back of the  
thermostat (see fig. 1) and switch it to the ELECTRIC  
position. This will allow the thermostat to energize the fan  
immediatelyonacallforheat.Ifyouareunsureiftheheating/  
cooling system requires the thermostat to control the fan,  
contact a qualified heating and air conditioning service  
person.  
C
W
W2  
R
O
B
G
Y
Y2  
Reset  
button  
3. Two jumpers are also located on the back of the thermostat,  
so that you may customize the thermostat to meet your  
individual preference (see fig. 1). In most applications, the  
factory jumper settings provide the most comfortable and  
convenient thermostat operation.  
Mounting  
holes  
Figure 2. Thermostat base  
Jumper wire W905 determines how fast the system cycles  
on and off, based on temperature change. As shipped from  
the factory, the thermostat will maintain a very consistent  
room temperature, usually within 1°F of the thermostat  
setting. To achieve a slower on and off cycle, providing a  
slightly wider temperature span, cut and separate jumper  
wire W905.  
INSTALLING THE THERMOSTAT  
1. Gently remove the cover by pulling it straight off the base.  
Forcing or prying on the unit may cause damage to the unit.  
2. Remove the battery tab. With the batteries installed, the  
Armchair Programming feature allows you to program the  
thermostat before installing it on the wall.  
JumperwireW903controlstheEnergyManagementRecov-  
ery (EMR) feature. EMR allows the thermostat to energize  
the heating system up to 30 minutes before the time pro-  
grammed into the thermostat. The thermostat will then  
energize the system to gradually raise the temperature to  
your programmed temperature by using the most efficient  
stage of heat practical.  
3. Pull wires through the hole in the thermostat base and place  
the base over the hole in the wall. Mark mounting hole  
locations on the wall using the base as a template.  
4. Move the base out of the way. Drill mounting holes.  
5. Fasten the base loosely to the wall, as shown in fig. 2, using  
two mounting screws. Place a level against the bottom of the  
base, adjust until level, and then tighten the screws. (Level-  
ing is for appearance only and will not affect thermostat  
operation.) If you are using existing mounting holes, or if the  
holes drilled are too large and do not allow you to tighten the  
base snugly, use plastic screw anchors to secure the base.  
For example, assume that the thermostat is programmed  
overnightto66°Fandtheroomtemperatureis66°. Ifthenext  
programis7AM, 70°F(anincreaseof4°), thethermostatwill  
start the system 30 minutes before 7 AM. If the temperature  
is in the room is within 2°F of your next programmed  
temperature, the thermostat will not start the system early.  
DO NOT clip jumper wire W903 unless you wish to perma-  
nently disable the EMR feature.  
6. Check that the system is turned off. Connect the wires  
beneath the terminal screws on the base using the appropri-  
ate wiring diagram (see figs. 3 through 5).  
7. Push excess wire into wall and plug hole with a fire-resistant  
material(suchasfiberglassinsulation)topreventdraftsfrom  
affecting thermostat operation.  
(Instructions continue on page 4.)  
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NOTE  
NOTE  
The following wiring diagrams show typical terminal identifica- Relay contacts shown are thermostatically operated.  
tion and wiring. For proper installation, refer to the original  
manufacturer's instructions.  
* The 24 Volt neutral connection  
to terminal C on the thermostat  
is not required if you replace  
Thermostat  
the batteries once a year with  
Control  
fresh “AA” Energizer® alkaline  
batteries.  
Circuit  
THERMOSTAT  
W2  
C*  
R
B
O
Y
Y2  
G
W
SYSTEM  
Heat  
Relay  
Compressor  
Contactor  
Stage 2  
Energized  
in COOL  
Stage 1  
Hot  
24 VAC  
120 VAC  
Neutral  
Compressor  
Contactor  
Stage 1  
Heat  
Relay  
Energized  
in HEAT  
Fan  
Relay  
TRANSFORMER  
Stage 2  
Figure 3. Typical wiring diagram for single transformer systems  
* The 24 Volt neutral connection  
to terminal C on the thermostat  
is not required if you replace  
the batteries once a year with  
fresh “AA” Energizer® alkaline  
batteries.  
Thermostat  
Control  
Circuit  
THERMOSTAT  
SYSTEM  
CUT AND  
TAPE OFF!  
B
W2  
C*  
R
Y
Y2  
G
O
W
Hot  
Heat  
Relay  
Compressor  
Contactor  
Stage 2  
Energized  
in COOL  
120 VAC  
24 VAC  
Stage 1  
Hot  
Neutral  
24 VAC  
120 VAC  
TRANSFORMER  
Compressor  
Contactor  
Stage 1  
Heat  
Relay  
Neutral  
TRANSFORMER  
Energized  
in HEAT  
Fan  
Relay  
Stage 2  
TWO COMMONS MUST  
BE JUMPERED TOGETHER!  
Figure 4. Typical wiring diagram for two-transformer systems with NO safety circuits  
* The 24 Volt neutral connection  
Thermostat  
Control  
to terminal C on the thermostat  
is not required if you replace  
the batteries once a year with  
fresh “AA” Energizer® alkaline  
batteries.  
Circuit  
THERMOSTAT  
SYSTEM  
B
W2  
C*  
R
Y
Y2  
G
O
W
Heat  
Relay  
Compressor  
Contactor  
Stage 2  
Energized  
in COOL  
Limit or  
Safety  
Switches  
Stage 1  
Limit or  
Safety  
Switches  
Hot  
24 VAC  
120 VAC  
Neutral  
Compressor  
Contactor  
Stage 1  
Heat  
Relay  
Energized  
in HEAT  
Fan  
24 VAC  
Accessory  
Relay N.O.  
Contact  
HEATING  
TRANSFORMER  
Relay  
Stage 2  
Common  
Limit or  
Safety  
Switches  
Limit or  
Safety  
Switches  
Hot  
TWO COMMONS MUST  
BE JUMPERED TOGETHER!  
24 VAC  
120 VAC  
Common  
Neutral  
COOLING  
TRANSFORMER  
Figure 5. Typical wiring diagram for two-transformer systems with safety circuits in BOTH systems  
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Ifthefanisrunningbutthecompressorisnotrunningandthe  
word COOL is flashing, the compressor lockout feature is  
operating (see Lockout Bypass Option to temporarily  
override the compressor lockout feature during testing).  
CHECK THERMOSTAT OPERATION  
NOTE  
If at any time during testing, your system does not operate  
properly, contact a qualified serviceperson.  
3. Press  
toadjusttemperaturesettingaboveroomtempera-  
ture. The cooling system should stop operating.  
Fan Operation  
1. Turn on power to the system.  
NOTE  
2. Press SYSTEM button until the system is OFF.  
3. MoveFANswitchtoON.Theblowershouldbegintooperate.  
During normal operation, the second stage of heat or cool may  
take 15 to 30 minutes to turn on. The delay varies depending on  
theperformanceofthefirststage.Typicallythesecondstagewill  
comeonsoonerinmoresevereweather,whileinmilderweather  
it will take longer. There is no adjustment to this feature, as it is  
designed to maximize both comfort and efficiency.  
4. Move FAN switch to AUTO position. The blower should stop  
within a short period of time.  
Heating System  
1. Press SYSTEM button to turn thermostat to HEAT.  
2. Press  
toadjustthermostatsettingto90° andholdforfive  
LOCKOUT BYPASS OPTION  
seconds. After you release the button, both stages of the  
heating system should begin to operate within five seconds.  
FOR QUALIFIED SERVICE TECHNICIANS’ USE  
ONLY.OPERATORSSHOULDNOTUSETHISFEA-  
TURE DUE TO POSSIBILITY OF EQUIPMENT OR  
PROPERTY DAMAGE, OR PERSONAL INJURY.  
3. Press  
toadjusttemperaturesettingbelowroomtempera-  
ture. The auxiliary heating system will stop immediately and  
the first stage will stop within three to four minutes.  
COMPRESSOR SHORT TERM  
CYCLE PROTECTION  
Cooling System  
CAUTION  
!
This thermostat has a built-in short term (5-minute)  
time delay. During this 5-minute period, the thermo-  
stat will lock out the compressor to allow head pres-  
sure to stabilize. If you want to override this feature  
Topreventcompressorand/orpropertydamage, ifthe  
outdoor temperature is below 50°F, DO NOT operate  
the cooling system.  
1. Press SYSTEM button to turn thermostat to COOL.  
while testing thermostat operation, simply press  
2. Press  
toadjustthermostatsettingto45° andholdforfive  
and  
buttons at the same time.  
seconds. After you release the button, the blower should  
come on immediately on high speed, followed by cold air  
circulation. Both stages of the cooling system should begin  
to operate (if you have a two-stage cooling system).  
DO NOT USE THE LOCKOUT BYPASS OPTION  
UNLESSTHECOMPRESSOROILHEATERSHAVE  
BEEN OPERATIONAL FOR 6 HOURS AND THE  
SYSTEM HAS NOT BEEN OPERATIONAL FOR AT  
LEAST 5 MINUTES.  
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OPERATION  
Before you begin programming your thermostat, you should be  
familiarwithitsfeaturesandwiththedisplayandthelocationand  
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.  
1
2
THE THERMOSTAT BASE  
SET TIME VIEW PRGM RUN PRGM HOLD TEMP  
SYSTEM  
FAN ON  
AUTO  
Other than  
and  
, the following buttons and switches are  
COOL-OFF-HEAT-AUTO  
located behind the door on the bottom of the thermostat cover  
(see fig. 6). Pull the door down to open it.  
The Thermostat Buttons and Switches  
3
4
5
6
7
8
(Red arrow) Raises temperature setting.  
(Blue arrow) Lowers temperature setting.  
SET TIME button.  
1
2
3
4
5
6
7
8
9
10  
11  
9
MO TU WE TH FR  
P
SA SU  
HEAT 1+2  
11  
LK  
COOL 1+2  
VIEW PRGM (program) button.  
RUN PRGM (program) button.  
HOLD TEMPerature button.  
BATT HOLD AUTO  
15 14  
13 12 10 10  
Figure 6. Thermostat display, buttons, and switches  
SYSTEM button (COOL, OFF, HEAT, AUTO).  
FAN switch (ON, AUTO).  
• AUTOMATIC CHANGEOVER —If you have a heating/  
cooling system, you can set the thermostat to automatically  
switch from heat to cool as needed to maintain setpoint  
temperature. To select this mode, press SYSTEM button  
until AUTO is displayed along with HEAT or COOL, iden-  
tifying the program automatically selected.  
The Display  
Indicates day of the week.  
9
HEAT is displayed when the SYSTEM button has been  
10  
pressed to put the thermostat in the HEAT mode. COOL is  
displayed when the SYSTEM button has been pressed to  
put the thermostat in the COOL mode. COOL is displayed  
(flashing) when the compressor is in lockout mode. AUTO  
is displayed when the SYSTEM button has been pressed to  
put the thermostat in the automatic changeover (AUTO)  
mode. 1+2 indicates the number of stages the thermostat is  
calling for.  
In AUTO mode, pressing  
and  
at the same time will  
change the displayed setpoint temperature to the setpoint  
of the other mode (HEAT or COOL). This allows you to  
change both the HEAT and COOL setpoints, if desired.  
• TOTAL KEYPAD LOCKOUT — This security feature al-  
lows you to lock out the thermostat buttons and switches to  
preventunauthorizedtampering.Toselectthisfeatureafter  
programming, press SET TIME and RUN PRGM buttons at  
the same time and holduntil LK is displayed. To unlock the  
thermostat, press SET TIME and RUN PRGM buttons at  
the same time until LK is no longer displayed.  
Alternately displays current time and temperature.  
11  
12  
The word HOLD is displayed when the thermostat is in the  
HOLD mode.  
• TEMPERATURE OVERRIDE — Press  
or  
until the  
BATT is displayed when approximately 70% of battery life  
13  
14  
display shows the temperature you want. The thermostat  
will override current programming and keep the room  
temperature at the selected temperature until the next  
program period begins. Then the thermostat will automati-  
cally revert to the program.  
• HOLD TEMPERATURE — The thermostat can hold any  
temperaturewithinitsrangeforanindefiniteperiod, without  
revertingtotheprogrammedtemperature. PresstheHOLD  
TEMP button. HOLD will be displayed. Then choose the  
has been exhausted.  
Displays currently programmed set temperature (this is  
blank when SYSTEM button has been pressed to turn the  
system OFF).  
LK is displayed when keypad lockout has been activated.  
15  
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.  
desired hold temperature by pressing  
or  
. The ther-  
mostat will hold the room temperature at the selected  
setting until you press RUN PRGM button to start program  
operation again.  
• SIMULTANEOUS HEATING/COOLING PROGRAM  
STORAGE—Whenprogramming,youcanenterbothyour  
heating and cooling programs at the same time. There is no  
need to reprogram the thermostat at the beginning of each  
season.  
• °F/°C CONVERTIBILITY — Press SET TIME and HOLD  
TEMPbuttonsuntilthetemperaturedisplayisinCelsius.To  
display Fahrenheit, repeat the process.  
(Instructions continue on page 6.)  
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• TEMPERATURE DISPLAY ADJUSTMENT — Your new Usethetableatthebottomofthepagetoplanyourprogramtime  
thermostathasbeenaccuratelysetinourfactory.However, periods,andthetemperaturesyouwantduringeachperiod.You  
if you wish, you may adjust your new thermostat tempera- may also want to look at the sample program table to get an idea  
ture display to match your old thermostat. This can be of how the thermostat can be programmed.  
accomplished (within a ±4°F range) as follows:  
1. Press VIEW PRGM and HOLD TEMP buttons at the  
same time.  
Entering Your Program  
Follow these steps to enter the heating and cooling programs  
you have selected.  
2. Press  
or  
to adjust the displayed temperature to  
your desired setting.  
3. PressRUNPRGMtoresumenormalprogramoperation.  
Set Current Time and Day  
1. Press SET TIME button once. The display will show the hour  
only.  
PROGRAMMING YOUR THERMOSTAT  
Now you are ready to program your thermostat. This section will  
help you plan your thermostat’s program to meet your needs.  
For maximum comfort and efficiency, keep the following guide-  
lines in mind when planning your program.  
P
EXAMPLE:  
2. Press and hold either  
or  
until you reach the correct  
• When heating (cooling) your building, program the tem-  
peratures to be cooler (warmer) when the building is vacant  
or during periods of low activity.  
hour (the letter P should be displayed for PM time, which  
begins at noon).  
3. Press SET TIME once. The display window will show the  
minutes only.  
• During early morning hours, the need for cooling is usually  
minimal.  
Look at the factory preprogrammed times and temperatures  
shown below. If this program will suit your needs, simply press the  
RUN PRGM button to begin running the factory preset program.  
EXAMPLE:  
FACTORY PREPROGRAMMING  
4. Press and hold either  
minutes.  
or  
until you reach the correct  
Cooling Program for  
ALL Days of the Week:  
Heating Program for  
ALL days of the Week:  
TEMP  
PERIOD  
TIME  
TEMP  
PERIOD  
1st  
2nd  
3rd  
4th  
TIME  
5. Press SET TIME once. The display will show the day of the  
week.  
70°F  
62°F  
70°F  
62°F  
1st  
2nd  
3rd  
4th  
6:00 AM  
8:00 AM  
5:00 PM  
10:00 PM  
6:00 AM  
8:00 AM  
5:00 PM  
10:00 PM  
78°F  
85°F  
78°F  
82°F  
6. Press  
or  
until you reach the current day of the week.  
7. Press RUN PRGM once. The display will show the correct  
time and room temperature alternately.  
If you want to change the preprogrammed times and tempera-  
tures, follow these steps.  
Determine the time periods and heating and cooling tempera-  
tures for your weekday and weekend programs. You must  
program four periods for both the weekday and weekend pro-  
gram. 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 weekend 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 weekday 1st period cooling start time  
and temperature).  
Enter Heating Program  
1. If you want to change the display from Fahrenheit to Celsius  
(or vice-versa), press SET TIME and HOLD TEMP at the  
same time.  
2. Press the SYSTEM button until HEAT is displayed.  
3. Press VIEW PRGM once. “MO TU WE TH FR” (indicating  
weekday program) will be displayed. Also displayed are  
the currently programmed start time for the 1st heating  
period and the currently programmed temperature  
(flashing).  
SAMPLE  
Heating/Cooling Schedule Plan  
Heating/Cooling Schedule Plan  
WEEKEND (2 DAY)  
WEEKDAY (5 DAY)  
WEEKEND (2 DAY)  
WEEKDAY (5 DAY)  
Start  
Time  
Start  
Time  
Start  
Time  
Start  
Time  
Period  
Temperature  
Temperature  
Period  
Temperature  
Temperature  
1ST HEAT  
1ST HEAT  
5:30 AM  
68°F  
7:00 AM  
11:00 AM  
6:00 PM  
11:30 PM  
7:00 AM  
12:30 PM  
6:00 PM  
11:30 PM  
68°F  
2ND HEAT  
3RD HEAT  
4TH HEAT  
1ST COOL  
2ND COOL  
3RD COOL  
4TH COOL  
2ND HEAT 8:00 AM  
3RD HEAT 5:00 PM  
4TH HEAT 10:30 PM  
1ST COOL 6:30 AM  
2ND COOL 2:00 PM  
3RD COOL 5:00 PM  
4TH COOL 10:30 PM  
65°F  
70°F  
65°F  
76°F  
78°F  
72°F  
78°F  
70°F  
70°F  
65°F  
76°F  
74°F  
72°F  
78°F  
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MO TU WE TH FR  
CHECK YOUR PROGRAMMING  
EXAMPLE:  
Follow these steps to check your thermostat programming one  
final time before beginning thermostat operation.  
This display window shows that for the 1st weekday period,  
the start time is 6:00 AM, and 70° is the programmed  
temperature(thisexamplereflectsfactorypreprogramming).  
1. Press SYSTEM button until HEAT is displayed.  
2. Press VIEW PRGM to view the 1st weekday heating period  
time and temperature. Each time you press VIEW PRGM,  
the next heating period time and temperature will be dis-  
played in sequence for weekday, then weekend program  
periods(youmaychangeanytimeortemperatureduringthis  
procedure).  
4. Press  
or  
to change the displayed temperature to your  
selected temperature for the 1st heating program period.  
5. Press SET TIME once (the programmed time will flash).  
Press  
or  
untilyourselectedtimeisdisplayed. Thetime  
3. Press RUN PRGM.  
will change in 15 minute increments. When your selected  
time is displayed, press SET TIME again to return to the  
change temperature mode.  
4. Press SYSTEM button until COOL is displayed.  
5. Repeat step 2 to check cooling temperatures.  
6. Press RUN PRGM to begin program operation.  
6. Press VIEW PRGM once. The currently programmed start  
time and setpoint temperature for the 2nd heating program  
period will be displayed.  
7. Press SYSTEM button to select HEAT, COOL, or AUTO  
mode.  
7. Repeat steps 4 and 5 to select the start time and heating  
temperature for the 2nd heating program period.  
YOUR THERMOSTAT IS NOW COMPLETELY PRO-  
GRAMMED AND READY TO AUTOMATICALLY PROVIDE  
MAXIMUM COMFORT AND EFFICIENCY!  
8. Repeatsteps4through6forthe3rdand4thheatingprogram  
periods. Weekday heating programs are now complete.  
NOTE  
9. Press VIEW PRGM once. “SA SU” (indicating weekend  
program) will be displayed, along with the start time for the  
1st heating period and the currently programmed tempera-  
ture.  
During normal operation, the second stage of heat or cool may  
take 15 to 30 minutes to turn on. The delay varies depending on  
theperformanceofthefirststage.Typicallythesecondstagewill  
comeonsoonerinmoresevereweather,whileinmilderweather  
it will take longer. There is no adjustment to this feature, as it is  
10.Repeat steps 4 through 8 to complete weekend heating  
programming.  
11.When you have completed entering your heating program, designed to maximize both comfort and efficiency.  
press RUN PRGM.  
TROUBLESHOOTING  
Enter Cooling Program  
If your thermostat’s display is frozen or displaying incorrectly,  
CAUTION  
the thermostat may have been affected by static discharge or  
voltagevariations. Ifthishappens, presstheRESETbutton(see  
fig. 2, page 2 for the location of the button). Pressing the RESET  
buttonwillclearalluserprogramming. Thethermostatwillrevert  
to factory preprogramming. You will need to reset the time and,  
if desired, reprogram the thermostat to your selected program.  
If pressing the RESET button does not correct the problem,  
contact a qualified service technician.  
!
If the outside temperature is below 50°F, disconnect  
power to the cooling system before programming.  
Energizing the air conditioner compressor during  
cold weather may cause personal injury or property  
damage.  
1. Press SYSTEM button until COOL is displayed.  
2. Follow the procedure for entering your heating program,  
using your selected cooling times and temperatures.  
For optimum performance, we recommend replacing batteries  
once a year with fresh “AA” Energizer® alkaline batteries.  
7

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