White Rodgers 1F91 71 Thermostat User Manual

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OPERATION GUIDE  
1F91-71  
Multi-stage Electronic Digital  
Thermostat  
WHITE-RODGERS  
Operator: Save this booklet for future use!  
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About Your New Thermostat . . .  
Your new Digital COMFORT SET II Multi-stage Thermostat uses the technology of a solid-state  
microcomputer to provide precise time/temperature control. The COMFORT SET II Thermostat  
offers you the flexibility to design heating and cooling programs that fit your needs.  
Please read this manual thoroughly before operating or programming your thermostat. If you have  
questions, you may write to our Technical Service Department at the address shown on the back  
cover of this booklet.  
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In This Guide . . .  
YOUR NEW THERMOSTAT’S  
PROGRAMMING YOUR  
FEATURES ........................................... 4  
OPERATING YOUR THERMOSTAT ........ 5  
PARTS OF THE THERMOSTAT  
The Back Of the Thermostat Body  
The Display  
THERMOSTAT ................................... 17  
PLANNING FOR YOUR NEEDS  
ENTERING YOUR PROGRAM  
Set Current Time and Day  
Enter Heating Program  
The Thermostat Buttons  
Enter Cooling Program  
OPERATING FEATURES  
CHECK YOUR PROGRAMMING  
QUESTIONS AND ANSWERS ............... 28  
Operator: Save this  
booklet for future use!  
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YOUR NEW THERMOSTAT’S FEATURES  
• Computed Energy Management Recovery  
• Manual program override (HOLD tempera-  
(EMR)  
ture)  
• Automaticchangeover(operatorselectable)  
• Five-day/two-day programming capability  
• “Advance Program” button  
• Backlit LCD displays continuous setpoint,  
time, and room temperature  
• Simultaneous heat and cool program stor-  
age  
• Adjustable cycle times  
• Preprogrammed temperature control  
• 9 volt Energizer® alkaline battery backup  
• Compressor short cycle protection  
• Blower delay in the cooling cycle  
• Four separate time and temperature set-  
tings per 24-hour period  
• Armchair programming capability  
• Up to three stages of heat and up to two  
stages of cool  
• Audio and visual prompting during pro-  
gramming  
• Temperature range 40° to 99°F  
°F/°C convertibility  
• Programmable blower control  
• Two hour temperature override  
• Compatible with Remote Sensor (optional)  
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OPERATINGYOURTHERMOSTAT  
Before you begin programming your new ther- Thesubbaseisattachedtothewall, butyoucan  
mostat, you should be familiar with its fea- remove the thermostat body for easy program-  
tures and with the display and the location and ming. To remove the thermostat body from the  
operation of the thermostat buttons. The in- subbase, grasp the thermostat body and gently  
formation in this section will help you become pull it out from the bottom of the subbase, then  
familiar with your thermostat so that you can pivot up. To attach the thermostat body, line up  
easily program it.  
thefourterminalpinsontheuppersectionofthe  
thermostat back with the matching connector  
on the subbase. Insert these, then gently pivot  
the thermostat body down to connect the nine  
pin connectors on the lower portion of the ther-  
mostat back. Gently push until the snap con-  
nectors engage. DO NOT FORCE OR PRY  
THE THERMOSTAT, as this may damage  
the unit.  
Your thermostat consists of two parts: the ther-  
mostat body and the subbase.  
CAUTION  
!
SYSTEM  
SWITCH  
Use  
to turn thermostat OFF be-  
fore removing or attaching the thermo-  
stat body. Equipment damage and/or  
personal injury could occur.  
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If the word BAT is flashing in the display  
window, the battery is low and should be  
replaced with a fresh 9 volt Energizer®  
alkaline battery. The battery will provide  
power for all functions except the display  
PARTS OF THE THERMOSTAT  
The Back of the Thermostat Body  
Turn the thermostat body over. On the back are  
the 9 volt Energizer® alkaline battery and the  
option switches.  
4-pin connector  
Battery  
1. The 9 volt Energizer® alkaline battery pro-  
vides power to the thermostat when the  
24 VAC power is interrupted (for example,  
when you remove the thermostat from the  
wall for programming). A fresh battery will  
maintain the stored program for approxi-  
mately one week. If power loss is long  
enough for the program to be lost, the  
thermostatwillautomaticallymaintainafac-  
tory preprogrammed heating temperature  
of 64°F and a cooling temperature of 82°F  
after power is restored. You must repro-  
Option switches  
9-pin connector  
BACK OF THERMOSTAT BODY  
gram the thermostat if this happens.  
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light and audio prompting, which work only 2. You may adjust option switch #4 for auto-  
on 24 VAC power. If the word BAT is dis-  
playedcontinuously(non-flashing),thether-  
mostat is not being supplied with 24 VAC  
power and is being powered by the battery  
alone.  
matic changeover from heating to cooling  
(see OPERATING FEATURES).  
CAUTION  
!
SYSTEM  
SWITCH  
Use  
to turn thermostat OFF be-  
fore removing thermostat from the wall  
to replace the battery.  
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Other than  
and  
, the buttons are  
Displays the setpoint temperature.  
3
4
located behind the thermostat door. To open  
the door, use your fingernail in the indentation  
at the top center of the door. Pull the door out,  
then swing the door down on its hinges.  
5DAYindicatesthatthedisplayedprogram  
is the weekday program. 2 DAY indicates  
that the displayed program is the weekend  
program.  
Following are brief descriptions of the display  
and the thermostat buttons.  
The word BAT flashes on the display when  
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6
the 9 volt alkaline battery is weak and  
should be replaced.  
The Display  
FAN  
operating continuously, regardless of heat-  
ing or cooling system cycling. FAN is  
is displayed when the blower is  
Continuouslydisplayssystemmode(HEAT,  
1
2
OFF, COOL, AUTO, HOLD). During pro-  
gramming, the program period is displayed  
(MOR, DAY, EVE, NHT).  
displayed during automatic fan operation  
(when the blower cycles with the heating or  
cooling system).  
Alternately displays room temperature (F  
denotes degrees Fahrenheit and C de-  
notes degrees Celsius) and time of day (A  
denotes AM time and P denotes PM time).  
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5
DAY  
FAN  
W H I T E - R O D G E R S  
DIGITAL MULTI-STAGE COMFORT-SET II  
TIME  
FWD  
SET  
CLOCK  
VIEW  
PRGM  
HOLD  
TEMP  
SYSTEM  
SWITCH  
HEAT/OFF/COOL/AUTO  
FAN  
SWITCH  
TIME  
BACK  
SET  
DAY  
RUN  
PRGM  
ADV  
PRGM  
ON  
/AUTO  
1
2
3
3
2
DAY  
FAN  
5
DAY  
BAT  
FAN  
6
4
4
5
2
6
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The Thermostat Buttons  
Used to initiate or review thermostat pro-  
gramming.  
12  
13  
Sets the system mode (HEATing, OFF,  
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8
9
Used to start program operation after pro-  
COOLing,orAUTOmaticchangeover[user  
gramming. Also used to return thermostat  
to program operation after being in HOLD  
mode.  
selectable feature]).  
Selects fan operation (see #6, above). This  
buttonisalsousedtoprogramthefantorun  
continuously during a program period.  
Used to manually override programming to  
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15  
holdataselectedtemperature(whenHOLD  
is displayed).  
Runs display forward or backward through  
time, day, or anticipation settings during  
programming.  
Usedtoadvancethermostatprogramtothe  
next program period (for example, from the  
MOR program to the DAY program).  
TIME  
FWD  
TIME  
Used with  
and  
to set current time  
10  
11  
BACK  
and day of the week.  
(Blue arrow) Lowers temperature setting  
(40°F or 4°C minimum).  
16  
17  
Used during programming to set the day of  
SET  
(Red arrow) Raises temperature setting  
(99°F or 37°C maximum)  
the week. Also used with  
anticipation setting mode.  
to enter  
CLOCK  
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yellow light is on when the 2nd or 3rd stage  
heating/cooling system is operating.  
The red light is on when the 1st stage  
heating/cooling system is operating. The  
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16 17  
18  
5
DAY  
FAN  
DIGITAL MULTI-STAGE COMFORT-SET  
W H I T E - R O D G E R S  
II  
TIME  
FWD  
SET  
CLOCK  
VIEW  
PRGM  
HOLD  
TEMP  
SYSTEM  
SWITCH  
7
8
HEAT/OFF/COOL/AUTO  
FAN  
SWITCH  
TIME  
BACK  
SET  
DAY  
RUN  
PRGM  
ADV  
PRGM  
ON  
/AUTO  
10  
11 12  
14 15  
13  
9
11  
period, beginning at 6:00 AM, you have  
programmed a temperature of 70°F. The  
thermostat will automatically activate the  
heating system at about 5:00 AM, so that  
the programmed 70°F temperature is  
reached by about 6:00 AM.  
OPERATING FEATURES  
Now that you are familiar with the thermostat  
display and buttons, read the following informa-  
tion to learn about the many features of the  
thermostat.  
COMPUTED ENERGY MANAGEMENT  
RECOVERY (EMR) - The thermostat’s mi-  
crocomputer automatically calculates the  
time it will take to change the temperature  
to the next program setting. Then the ther-  
mostat will activate the heating or cooling  
system to change the temperature so that  
the desired temperature is reached at the  
beginningofthenextprogramperiod. Asan  
example of this feature, assume that you  
have programmed your thermostat to pro-  
vide an overnight heating temperature of  
62°F, and that during the next program  
AUTOMATIC CHANGEOVER — You can  
set the thermostat to automatically switch  
the system from heating to cooling as  
needed. First, you must move option switch  
#4 (located on the back of the thermostat  
body)totheONposition,ifithasnotalready  
been done. To do this, turn off 24 VAC  
power to the thermostat. Then, remove the  
thermostat body from the wall. Check the  
position of switch #4 (the last switch on the  
right). If it is ON (up), simply put the thermo-  
stat back on the wall and restore 24 VAC  
power. If the switch is OFF (down), use a  
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pencil or small screwdriver to move the  
switch to the ON position (see figure at  
right). Leave the battery out of the thermo-  
stat for at least two minutes, to allow the  
thermostat to reset itself. DO NOT MOVE  
ANY OTHER OPTION SWITCH, as it may  
affect thermostat operation. Replace the  
battery, putthethermostatbackonthewall,  
and restore 24 VAC power. To set the ther-  
mostat for automatic changeover after pro-  
Automatic Changeover (ON)  
ON  
1
2
3
4
Switch #1 set at installation (DO NOT CHANGE)  
Switch #2 set at installation (DO NOT CHANGE)  
Switch #3 set at installation (DO NOT CHANGE)  
Switch #4 ON  
In the AUTO mode, the thermostat will not allow  
the temperature separation between the high-  
est heat setting and the lowest cool setting to be  
less than 1°F. For example, if the highest heat  
setting is 76°F, the lowest cool setting cannot  
be below 77°F (see diagram below).  
SYSTEM  
SWITCH  
gramming, press  
to set the ther-  
mostat to AUTO (the setpoint display is  
blank in the AUTO mode). The system will  
now automatically switch between heating  
and cooling depending on the actual room  
temperature.  
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78  
COOLING TEMPERATURES  
77  
76  
DEAD BAND 1°F  
75  
HEATING TEMPERATURES  
74  
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TWO HOUR TEMPERATURE OVER-  
RIDE — Press or until the  
feature is ideal for energy conservation  
when the building is unoccupied for an  
extended period of time.  
display shows the temperature you want.  
The thermostat will override current pro-  
gramming and keep the room temperature  
at the selected temperature for two hours.  
After two hours, the thermostat will auto-  
matically revert to the program.  
“ADVANCE PROGRAM” BUTTON —  
ADV  
Press  
to advance the thermostat pro-  
PRGM  
gram to the next period (such as from the  
MOR program period to the DAY program  
period). This change remains in effect until  
the next program period begins.  
HOLD TEMPERATURE — The thermostat  
can hold any temperature within its range  
for an indefinite period, without reverting to  
TIME  
°F/°CCONVERTIBILITYPress  
and  
FWD  
HOLD  
the program. Press  
displayed. Then choose the desired hold  
temperature by pressing or  
. HOLD will be  
TEMP  
TIME  
at the same time until the temperature  
BACK  
display is in °C (Celsius). To display °F,  
.
repeat the process.  
The thermostat will hold the room tempera-  
ture at the selected setting until you press  
ADJUSTABLE HEATING AND COOLING  
CYCLE TIMES (ANTICIPATION) — If the  
heating/coolingsystemisturningonandoff  
RUN  
to start program operation again. This  
PRGM  
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too often (short cycles) or not often enough  
(long cycles), you may want to adjust the  
anticipation setting.  
TIME  
FWD  
If the heat cycles are too short, press  
to increase the cycle time. If the heat cycles  
TIME  
are too long, press  
to decrease the  
BACK  
CAUTION  
!
cycletime.Tosetcoolinganticipation,press  
A cooling anticipation setting of less  
than 10 may cause decreased com-  
pressor life.  
SET  
SET  
DAY  
and  
at the same time again. The  
CLOCK  
display will show COOL 14 (factory prepro-  
TIME  
SET  
SET  
DAY  
grammedcoolinganticipation).Usethe  
To adjust anticipation, press  
and  
FWD  
CLOCK  
at the same time. The display will show  
HEAT 8 (this is the factory preprogrammed  
heating anticipation setting). You may se-  
lect any anticipation setting from 4 to 40.  
Whenever adjusting anticipation, increase  
or decrease the displayed number by only  
one or two digits, then let the system run for  
a while to see if the adjustment is sufficient.  
TIME  
and  
buttonstoadjustanticipation.Press  
BACK  
RUN  
to return to your program.  
PRGM  
LOW BATTERY INDICATOR — The word  
BAT will flash on the display if the 9 volt  
alkaline battery is low and should be re-  
placed.  
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AUDIO PROMPTING — Each time you  
press a button, the thermostat will beep.  
SYSTEM  
SWITCH  
b) Pressing  
modes.  
to change operating  
BACKLIT DISPLAY — When you press  
any button on the thermostat, the display is  
lit for approximately eight seconds (this  
feature works only when the thermostat is  
attached to the wall and 24 VAC power is  
present to the thermostat).  
c) Pressing  
or to create a call  
for COOL too soon after a previous call.  
SYSTEM INDICATOR LIGHTS — The red  
indicator light comes on whenever the first  
stage heating or cooling system is operat-  
ing. The yellow indicator light comes on  
when the second or third stages of heating  
or cooling are operating.  
COMPRESSOR SHORT CYCLE PRO-  
TECTION — To protect your compressor  
from potential damage due to rapid cycling,  
this thermostat has a built-in delay of 5  
minutesbetweencoolingcycles.Theblower  
will operate during a time delay, but the air  
circulated will not be cooled. The following  
may cause a time delay in COOL:  
PROGRAMMABLE BLOWER CON-  
TROL — You may program the fan blower  
to run continuously during any given pro-  
gramperiod,regardlessofthecyclingofthe  
heatingorcoolingsystem. Duringprogram-  
ming, after entering the time and tempera-  
a) Return of power after a power outage.  
FAN  
SWITCH  
ture for the time period, press  
until  
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FAN is displayed. To override constant  
FAN  
SWITCH  
fan, press  
played.  
until FAN  
is dis-  
PROGRAMMINGYOURTHERMOSTAT  
Now you are ready to program your thermostat.  
Thissectionwillhelpyouplanandprogramyour  
thermostat to meet your needs.  
PLANNING FOR YOUR NEEDS  
This thermostat will store separate heating and  
cooling programs for five-day (weekday) and  
two-day (weekend) operation. Usually, the five-  
day program is set to run Monday through  
Friday, and the two-day program is set to run  
Saturday and Sunday. However, you may  
choose any five consecutive days to be your  
weekdayprogramdays(suchasSundaythrough  
Thursday; in this case, your weekend program  
would run on Friday and Saturday).  
For maximum comfort and efficiency, keep the  
followingguidelinesinmindwhenplanningyour  
program.  
• When heating (cooling) your building, pro-  
gramthetemperaturestobecooler(warmer)  
when the building is vacant or during peri-  
ods of low activity.  
• During early morning hours, the need for  
cooling is usually minimal.  
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First, you should answer the following ques-  
tions to help you decide what your needs are. If  
you are using the thermostat for a commercial  
application (a store, office building, etc.), an-  
swer questions 1 through 4. If you are using the  
thermostat in your home, answer questions 5  
through 8. Keep in mind that you should plan for  
both weekday and weekend programs.  
b. What temperature should the building be at  
this time? These will be your DAY tempera-  
ture settings.  
3a. What time do the building occupants reach  
a minimum activity level (limited personnel  
in building)? These will be your EVE  
(evening) temperature settings.  
b. What temperature should the building be at  
this time?  
FOR COMMERCIAL APPLICATIONS:  
4a. What time does the building become va-  
cant?  
1a. What time does the first person arrive at the  
building in the morning?  
b. What temperature should the building be at  
this time? These will be your NHT (night)  
temperature settings.  
b. What temperature should the building be at  
this time? (heating? cooling?) These will be  
your MOR (morning) temperature settings.  
IN YOUR HOME:  
2a. What time do the building occupants reach  
amaximumactivitylevel(usinglights,equip-  
ment, meeting rooms, etc.)?  
5a. Whattimedoesthefirstpersongetupinthe  
morning?  
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b. What temperature should the house be at Now look at the factory preprogrammed times  
this time? These will be your MOR (morn- and temperatures shown at the top of the next  
ing) temperature settings.  
page. Ifthisprogramwillsuityourneeds, simply  
RUN  
6a. What time does the last person leave the  
house in the morning?  
press  
to begin running the factory preset  
PRGM  
program.  
b. What temperature should the house be at  
this time? These will be your DAY tempera-  
ture settings.  
Ifyouwanttochangethepreprogrammedtimes  
and temperatures, do the following.  
7a. Whattimedoesthefirstpersonarrivehome  
in the evening?  
NOTE  
To operate properly in the AUTO mode, there  
must be a minimum 1°F separation between  
the highest heat temperature and the lowest  
cool temperature (see diagram below).  
b. What temperature should the house be at  
this time? These will be yourEVE (evening)  
temperature settings.  
8a. What time does the last person go to bed at  
night?  
79  
78  
COOLING TEMPERATURES  
b. What temperature should the house be at  
this time? These will be your NHT (night)  
temperature settings.  
77  
76  
DEAD BAND 1°F  
75  
HEATING TEMPERATURES  
74  
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FACTORY PREPROGRAMMING  
Cooling Program for ALL Days of the Week:  
Heating Program for ALL days of the Week:  
TEMP  
78  
82  
78  
78  
PERIOD  
MOR  
DAY  
EVE  
NHT  
TIME  
TEMP  
70  
70  
70  
64  
PERIOD  
MOR  
DAY  
EVE  
NHT  
TIME  
5:00 AM  
9:00 AM  
4:00 PM  
10:00 PM  
5:00 AM  
9:00 AM  
4:00 PM  
10:00 PM  
Determine the time periods and heating and weekday MOR heating start time and tempera-  
cooling temperatures for your weekday pro- ture, and choose 7:00 AM and 76° as the  
gram. You must program 4 periods for each day weekday MOR cooling start time and tempera-  
(MOR, DAY, EVE, and NHT). However, you ture). Use the following table to plan your pro-  
may use the same heating and cooling tem- gram time periods, and the temperatures you  
peratures for consecutive time periods. You want during each period. You may also want to  
can choose start times, heating temperatures, look at the sample program table to get an idea  
and cooling temperatures independently for of how the thermostat can be programmed.  
both weekday and weekend programs (for ex-  
ample, you may select 5:00 AM and 70° as the  
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Heating/Cooling Schedule Plan  
WEEKEND (2 DAY)  
WEEKDAY (5 DAY)  
Start  
Time  
Start  
Time  
Temperature  
Temperature  
MOR HEAT  
DAY HEAT  
EVE HEAT  
NHT HEAT  
MOR COOL  
DAY COOL  
EVE COOL  
NHT COOL  
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SAMPLE  
Heating/Cooling Schedule Plan  
WEEKEND (2 DAY)  
WEEKDAY (5 DAY)  
Start  
Time  
Start  
Time  
Temperature  
Temperature  
MOR HEAT  
DAY HEAT  
EVE HEAT  
NHT HEAT  
MOR COOL  
DAY COOL  
EVE COOL  
NHT COOL  
5:30 AM  
68°  
7:30 AM  
2:00 PM  
6:00 PM  
12:00 AM  
8:00 AM  
2:00 PM  
6:00 PM  
12:00 AM  
68°  
8:00 AM  
4:30 PM  
11:00 PM  
8:00 AM  
12:00 PM  
4:30 PM  
11:00 PM  
66°  
70°  
66°  
76°  
78°  
74°  
78°  
70°  
70°  
66°  
76°  
74°  
74°  
78°  
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Set Current Time and Day  
ENTERING YOUR PROGRAM  
SET  
Follow these steps to enter the heating and  
cooling programs you have selected.  
1. Press  
once. The display will show  
CLOCK  
minutes only.  
NOTE  
EXAMPLE:  
We recommend that you remove the thermo-  
stat from the wall for programming (especially  
for entering cooling programming). A fresh 9  
volt Energizer® alkaline battery must be in-  
stalled to perform off-wall programming. BE  
SURE SYSTEM SWITCH IS SET TO OFF  
POSITION BEFORE REATTACHING THER-  
MOSTAT TO SUBBASE!  
TIME  
FWD  
TIME  
2. Press and hold either  
or  
until you  
BACK  
reach the correct minutes.  
SET  
3. Press  
once. The display window will  
CLOCK  
show the hour only.  
EXAMPLE:  
TIME  
FWD  
TIME  
4. Press and hold either  
or  
until you  
BACK  
NOTE  
reach the correct hour and AM/PM desig-  
nation (AM begins at midnight; PM begins  
at noon).  
You cannot program the thermostat with the  
SYSTEM SWITCH in the AUTO position.  
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SET  
DAY  
VIEW  
5. Press  
once. The display will show the  
programming after this happens, press  
PRGM  
day of the week as an abbreviation (MO for  
Monday, TU for Tuesday, etc.).  
until you are at the point where you stopped  
programming. Then you may continue to enter  
your programs normally. If you want to stop  
TIME  
FWD  
TIME  
6. Press and hold either  
or  
until you  
BACK  
RUN  
programming at any time, simply press  
resume program operation.  
to  
PRGM  
reach the current day of the week.  
RUN  
7. Press  
once. The display will show the  
PRGM  
SYSTEM  
SWITCH  
1. Press  
until HEAT is displayed.  
correct time and room temperature alter-  
nately.  
VIEW  
2. Press  
once. 5 DAY (indicating week-  
PRGM  
Enter Heating Program  
day program), and MOR, representing  
the morning heating period, will appear  
in the display. Also displayed are the  
currently programmed start time for the  
MORperiodandthecurrentlyprogrammed  
temperature.  
During programming, if you don’t press any  
buttons for 5 minutes, the thermostat will enter  
the HOLD mode and will maintain a constant  
temperature. The display will revert to the alter-  
nating time/temperature display. To resume  
EXAMPLE:  
5 DAY  
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This display window shows that for the  
weekday MOR period, the start time is 5:00  
AM, and 70° is the programmed tempera-  
ture (this example reflects factory prepro-  
gramming).  
VIEW  
6. Press  
.Thecurrentlyprogrammedstart  
PRGM  
time and heating temperature for weekday  
DAY will be displayed.  
7. Repeat steps 3 through 5 to select the start  
time and heating temperature for the week-  
day DAY program.  
3. To change the displayed start time to your  
selected start time for weekday MOR heat  
8. Repeat steps 3 through 7 for the weekday  
TIME  
FWD  
TIME  
program, press  
or  
until your se-  
BACK  
EVE and NHT heating programs.  
lectedtimeappears.Thetimewillchangein  
15 minute increments.  
9. After entering your weekday heating pro-  
gram, repeat steps 1 through 8 for your  
weekend programming (keep in mind that  
for weekend programming, the display  
should be changed from 5 DAY to 2 DAY).  
4. Press  
or  
until you reach your  
selected weekday MOR heating tem-  
perature.  
10. When you have completed entering your  
5. If you want the fan to run continuously  
RUN  
FAN  
SWITCH  
heating program, press  
.
during this period, press  
until  
PRGM  
FAN is displayed.  
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Enter Cooling Program  
SYSTEM  
SWITCH  
1. Press  
until COOL appears.  
CAUTION  
!
2. Enter your cooling program by following  
the procedure for entering your heating  
program.  
If outside temperature is below 50°F, we  
recommend that you remove the ther-  
mostat from the wall before proceeding  
withthefollowingstepstoprogramcool-  
ing temperatures. Personal injury or  
property damage may occur due to air  
conditioner compressor slugging. A  
fresh 9 volt Energizer® alkaline battery  
must be installed to perform off-wall  
programming. Programming away from  
the wall should prevent accidental com-  
pressor operation. BE SURE SYSTEM  
SWITCH IS SET TO OFF POSITION BE-  
FORE REATTACHING THE THERMO-  
STAT TO THE SUBBASE!  
CHECK YOUR PROGRAMMING  
Follow these steps to check your thermostat  
programming one final time before beginning  
thermostat operation.  
SYSTEM  
SWITCH  
1. Press  
until HEAT is displayed.  
VIEW  
2. Press and hold  
to view the heating  
PRGM  
period times and temperatures in se-  
quence for weekday MOR, DAY, EVE,  
and NHT, then for weekend MOR, DAY,  
EVE, and NHT.  
26  
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RUN  
SYSTEM  
SWITCH  
3. Press  
4. Press  
.
Press  
until OFF is displayed. Reattach  
PRGM  
SYSTEM  
SYSTEM  
SWITCH  
thermostat to subbase. Then press  
to  
SWITCH  
until COOL is displayed.  
select the operation mode you want (HEAT,  
5. Repeat step 2 to check cooling tempera-  
tures.  
FAN  
COOL, AUTO). Press  
until FAN is  
SWITCH  
RUN  
displayed (automatic cycling).  
6. Press  
to begin program operation.  
PRGM  
YOURTHERMOSTATISNOWCOMPLETELY  
PROGRAMMEDANDREADYTOAUTOMATI-  
CALLYPROVIDEMAXIMUMCOMFORTAND  
EFFICIENCY!  
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QUESTIONS AND ANSWERS  
1. How can I permanently change a part of  
DAY, which means the temperature will not  
change when the EVE period begins. See  
PROGRAMMING YOUR THERMOSTAT.  
my program?  
VIEW  
Press  
until you reach the time/tem-  
PRGM  
3. How can I finish my programming if the  
display has already changed to time/  
temperature?  
perature schedule you want. Then press  
TIME  
FWD  
TIME  
or  
and  
and  
to change  
BACK  
During programming, if no buttons are  
pressedforfiveminutes, thethermostatwill  
enter the HOLD mode and maintain a con-  
stant temperature. The display will change  
to the time/temperature mode. To resume  
the program. See PROGRAMMING YOUR  
THERMOSTAT.  
2. How can I have no change in tempera-  
ture from one time period to another?  
VIEW  
Simply select the same temperature for  
eachconsecutivetimeperiod.Forexample,  
you may select the same weekday EVE  
coolingtemperatureasyoudidforweekday  
programming, press  
until you return to  
PRGM  
the point where you stopped programming.  
Then you may continue to program the  
thermostat normally. If you want to stop  
28  
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5. Why can’t I program the thermostat in  
the AUTO mode?  
RUN  
programming at this point, press  
to  
PRGM  
startthenormalprogramfunction.SeePRO-  
GRAMMING YOUR THERMOSTAT.  
The thermostat can only be programmed in  
the HEAT and COOL modes. See PRO-  
GRAMMING YOUR THERMOSTAT.  
4. What happens if the electricity goes off  
or is manually shut off?  
6. What can cause the thermostat display  
to freeze or go blank?  
If you have not installed a 9 volt alkaline  
battery, the display will go blank and the  
program will be lost in approximately one  
minute. When electricity is restored, the  
thermostatwillmaintainaheatingtempera-  
ture of 64°F and a cooling temperature of  
82°F until you reenter your program. Set-  
point temperature will not be displayed.  
If a fresh 9 volt Energizer® alkaline battery  
is installed, the program will be maintained  
for about one week with no 24 VAC power  
present to the thermostat. See OPERAT-  
ING YOUR THERMOSTAT.  
A completely blank display may indicate  
that power has been lost to the thermostat  
and the backup battery is also dead. How-  
ever, if there is power to the thermostat and  
the display is blank or frozen, static dis-  
charge is probably the cause.  
During periods of low humidity (especially  
during cold weather), you may feel or see a  
spark discharge when you touch the ther-  
mostat. This may cause the program to be  
lost or the thermostat to display incorrectly.  
To correct this, remove the thermostat from  
29  
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the wall and disconnect the battery. Wait 7. Why won’t the setpoint temperature go  
about one minute, then reconnect the bat-  
tery. The thermostat will revert to the fac-  
torypresetprogramuntilyoureprogramthe  
thermostat. If you don’t want to reprogram  
to the temperature I want?  
In the AUTO mode, the highest heating  
setpoint temperature you select must be at  
least 1°F lower than the lowest cooling  
setpoint temperature you select (for ex-  
ample, if 70°F is your lowest selected cool-  
ing temperature, you cannot select a heat-  
ing temperature any higher than 69°F). If  
such a conflict exists, you must set the  
lowest cooling temperature higher in order  
to set the heating temperature higher. To  
set a lower cooling temperature, you must  
select a lower heating temperature. See  
PROGRAMMING YOUR THERMOSTAT.  
SYSTEM  
SWITCH  
the thermostat immediately, press  
until OFF is displayed and replace the ther-  
RUN  
mostatonthewall.Thenpress  
tobegin  
PRGM  
the factory preset program. Or you may  
reprogram the thermostat, then replace it  
on the wall.  
To prevent further static discharge prob-  
lems, touch another object to release static  
build-up before touching the thermostat.  
See OPERATING YOUR THERMOSTAT.  
30  
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8. Why doesn’t the display light come on 10. Why won’t the system turn on, even  
when I press a button? Why don’t I hear  
a beep when I press a button?  
though the thermostat display is func-  
tioning normally?  
Thedisplaylightandaudioprompting(beep)  
onlyworkwhenthethermostatisonthewall  
and 24 VAC power is present to the ther-  
mostat. These features will not work on  
battery power alone. See OPERATING  
YOUR THERMOSTAT.  
Either the compressor lockout feature is in  
operation or the thermostat is not currently  
calling for heat or cool. Wait about 5 min-  
utes for the compressor lockout to expire. If  
the system is still not running, read the  
following cautionary statement on the  
next page. Then, if conditions permit,  
9. The display is flashing BAT. What does  
this mean?  
use the  
or  
buttons to move the  
temperature above or below the setpoint  
temperature. See OPERATING YOUR  
THERMOSTAT.  
The9voltbatteryinstalledinthethermostat  
is low and should be replaced with a fresh  
9 volt Energizer® alkaline battery. See OP-  
ERATING YOUR THERMOSTAT.  
31  
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Youhaveprogrammedtheincorrectday  
or time. Check your programming (be  
sure that the times you programmed are  
correct AM or PM times). See PRO-  
GRAMMING YOUR THERMOSTAT.  
CAUTION  
!
If the outside temperature is below 50°F,  
DO NOT use the button to move  
the temperature below the setpoint tem-  
perature. Property damage may result  
due to compressor slugging.  
The thermostat is in the HOLD mode.  
RUN  
Press  
to start program operation.  
PRGM  
11. Why doesn’t the temperature change at  
the time I programmed?  
See OPERATING YOUR THERMO-  
STAT.  
There may be a number of causes for  
this situation. The following are primary  
reasons.  
The compressor lockout feature is oper-  
ating; wait about 5 minutes for system to  
beginrunning.SeeOPERATINGYOUR  
THERMOSTAT.  
TheEMRfunctionisoperating.TheEMR  
function will bring the system on auto-  
matically to bring the temperature to the  
selected level by the beginning of the  
next program period. See OPERATING  
YOUR THERMOSTAT.  
32  
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12. Why does the blower fan keep running 14. Between heating and cooling seasons, I  
after the system has turned off?  
want to turn my system off. Can I do this  
without affecting my thermostat pro-  
gramming?  
You have programmed the fan to run  
continuously during this period. See  
PROGRAMMING YOUR THERMO-  
STAT.  
Any time you wish to turn your system off,  
SYSTEM  
SWITCH  
simplypress  
untilthedisplayshows  
The blower delay feature is operating.  
This energy saving feature continues to  
blow conditioned air through the ducts  
after the system has turned off, rather  
than letting the air dissipate.  
OFF. This will not affect your thermostat’s  
programming in any way. To turn the sys-  
SYSTEM  
SWITCH  
tem back on, press  
until HEAT,  
COOL, etc. is displayed. The system will  
automatically begin operating according to  
the current thermostat program, unless the  
thermostat is in the HOLD mode. See OP-  
ERATING YOUR THERMOSTAT.  
13. Why is the system turning on and off so  
frequently (seldom)?  
The anticipation setting is too low (high). To  
change anticipation settings, see OPER-  
ATING YOUR THERMOSTAT.  
33  
15. I live in an area where daylight savings 16. Do I have to reprogram my thermostat  
time is observed. How do I change the  
thermostat clock twice a year without  
affecting thermostat programming?  
after I change the battery?  
When the thermostat is on the wall and the  
system has power, the thermostat is being  
powered by a 24 VAC source. If power is  
lost, orifthethermostatisremovedfromthe  
wall, the program will be retained for ap-  
proximately one minute if there is no bat-  
tery installed or if the installed battery is  
dead. If you are changing the battery after  
seeing a flashing BAT on the display, the  
installed battery may be dead. If you re-  
move the old battery and install a fresh one  
within one minute, you should not lose your  
thermostat programming. After installing a  
new battery, follow the procedures in  
CHECK YOUR PROGRAMMING to deter-  
minewhetheryourprogrammingwasmain-  
tained.  
To change the clock, follow the instructions  
for setting current time and day (see EN-  
TERING YOUR PROGRAM). Thermostat  
programming is not affected when you  
change the clock.  
34  
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If the thermostat maintains programming,  
SYSTEM  
SWITCH  
press  
until OFF is displayed, put  
the thermostat back on the wall, press  
SYSTEM  
SWITCH  
againtoselecttheoperatingmode  
RUN  
you want, then press  
to start program  
PRGM  
operation. If the program is lost, reprogram  
the thermostat. See PROGRAMMING  
YOUR THERMOSTAT.  
35  
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If you need further information on programming or operation, you  
may write to our Technical Service Department at the address  
shown below.  
WHITE-RODGERS DIVISION  
EMERSON ELECTRIC CO.  
9797 REAVIS ROAD  
Part No. 37-4739C  
Replaces 37-4739B  
9606  
ST. LOUIS, MISSOURI 63123-5398  

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