White Rodgers Thermostat 1F91W 71 User Manual

OPERATION GUIDE  
1F91W-71  
Multi-stage Electronic Digital  
Thermostat  
WHITE-RODGERS  
Operator: Save this booklet for future use!  
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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  
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booklet for future use!  
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3
YOUR NEW THERMOSTAT’S FEATURES  
• Computed Energy Management Recovery  
• Manual program override (HOLD tempera-  
(EMR)  
ture)  
• Automaticchangeover(operatorselectable)  
• Five-day/two-day programming capability  
• Simultaneous heat and cool program stor-  
age  
• Preprogrammed temperature control  
• Four separate time and temperature set-  
tings per 24-hour period  
• Armchair programming capability  
• Audioandvisualpromptingduringprogram-  
ming  
• Programmable blower control  
• Two hour temperature override  
• "Advance Program" button  
• Backlit LCD displays continuous setpoint,  
time, and room temperature  
• Adjustable cycle times  
• 9 volt Energizer® alkaline battery backup  
• Compressor short cycle protection  
• Blower delay in the cooling cycle  
• Up to three stages of heat and up to two  
stages of cool  
• Temperature range 40° to 99°F  
°F/°C convertibility  
• Compatible with Remote Sensor (optional)  
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4
OPERATINGYOURTHERMOSTAT  
Before you begin programming your new ther- The subbase is attached to the wall, but you can  
mostat, you should be familiar with its features remove the thermostat body for easy program-  
and with the display and the location and opera- ming. To remove the thermostat body from the  
tion of the thermostat buttons. The information subbase, grasp the thermostat body and gently  
in this section will help you become familiar with pull it out from the bottom of the subbase, then  
your thermostat so that you can easily program pivot up. To attach the thermostat body, line up  
it.  
the four terminal pins on the upper section of the  
thermostatbackwiththematchingconnectoron  
Your thermostat consists of two parts: the the subbase. Insert these, then gently pivot the  
thermostat body and the subbase.  
thermostat body down to connect the nine pin  
connectors on the lower portion of the thermo-  
statback. Gentlypushuntilthesnapconnectors  
engage. DONOTFORCEORPRYTHETHER-  
MOSTAT, as this may damage the unit.  
CAUTION  
!
Remove power from the system at the  
circuit breaker/fuse box before remov-  
ing or attaching the thermostat body.  
Equipment damage and/or personal in-  
jury could occur.  
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5
power is restored. You must reprogram the  
thermostat if this happens.  
PARTS OF THE THERMOSTAT  
If the word BAT is flashing in the display  
window, the battery is low and should be  
replaced with a fresh 9 volt Energizer® alka-  
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 ther-  
mostat will automatically maintain a factory  
preprogrammedheatingtemperatureof64°F  
and a cooling temperature of 82°F after  
Option switches  
9-pin connector  
BACK OF THERMOSTAT BODY  
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6
line battery. The battery will provide power 2. You may adjust option switch #4 for auto-  
for all functions except the display light and  
audioprompting,whichworkonlyon24 VAC  
power. If the word BAT is displayed con-  
tinuously (non-flashing), the thermostat 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  
!
Before removing thermostat from the  
wall to replace the battery, remove  
24 VACpowerfromthethermostatatthe  
breaker/fuse box.  
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7
3
4
Other than  
and  
, the buttons are  
Displays the setpoint temperature.  
5 DAY indicates that the displayed program  
is the weekday program. 2 DAY indicates  
that the displayed program is the weekend  
program.  
locatedbehindthethermostatdoor. Toopenthe  
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.  
5
6
The word BAT flashes on the display when  
the9voltalkalinebatteryisweakandshould  
be replaced.  
Following are brief descriptions of the display  
and the thermostat buttons.  
FAN  
operating continuously, regardless of heat-  
ing or cooling system cycling. FAN is  
is displayed when the blower is  
The Display  
1
2
Continuouslydisplayssystemmode(HEAT,  
OFF, COOL, AUTO, HOLD). During pro-  
gramming, the program period is displayed  
(MOR, DAY, EVE, NHT).  
Alternately displays room temperature (F  
denotesdegreesFahrenheitand Cdenotes  
degrees Celsius) and time of day (A de-  
notes AM time and P denotes PM time).  
displayed during automatic fan operation  
(when the blower cycles with the heating or  
cooling system).  
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8
5
DAY  
FAN  
SYSTEM  
COOL AUTO  
TIME  
FWD  
SET  
CLOCK  
VIEW  
PRGM  
HOLD  
TEMP  
HEAT  
-
OFF  
-
-
TIME  
BACK  
SET  
DAY  
RUN  
PRGM  
ADV  
PRGM  
FAN  
ON - AUTO  
1
2
3
3
2
DAY  
FAN  
5
DAY  
BAT  
FAN  
6
4
4
5
2
6
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9
The Thermostat Buttons  
Used to start program operation after pro-  
gramming. Also used to return thermostat  
to program operation after being in HOLD  
mode.  
Used to manually override programming to  
holdataselectedtemperature(whenHOLD  
is displayed).  
Used to advance thermostat program to the  
next program period (for example, from the  
MOR program to the DAY program).  
13  
7
8
9
Sets the system mode (HEATing, OFF,  
COOLing, orAUTOmaticchangeover[user  
selectable feature]).  
Selects fan operation (see #6, above). This  
button is also used to program the fan to run  
continuously during a program period.  
Runs display forward or backward through  
time, day, or anticipation settings during  
programming.  
14  
15  
16  
17  
18  
(Blue arrow) Lowers temperature set-  
ting (40°F or 4°C minimum).  
(Red arrow) Raises temperature set-  
ting (99°F or 37°C maximum)  
The red light is on when the 1st stage  
heating/cooling system is operating. The  
yellow light is on when the 2nd or 3rd stage  
heating/cooling system is operating.  
TIME  
FWD  
TIME  
BACK  
Used in conjunction with  
and  
to  
10  
11  
set current time and day of the week.  
Used during programming to set the day of  
the week. Also used in conjunction with  
SET  
CLOCK  
to enter anticipation setting mode.  
Used to initiate or review thermostat pro-  
gramming.  
12  
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10  
16 17  
18  
5 DAY  
FAN  
SYSTEM  
COOL AUTO  
TIME  
FWD  
SET  
CLOCK  
VIEW  
PRGM  
HOLD  
TEMP  
7
8
HEAT  
-
OFF  
-
-
TIME  
BACK  
SET  
DAY  
RUN  
PRGM  
ADV  
PRGM  
FAN  
ON - AUTO  
10  
11 12  
14 15  
13  
9
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11  
62°F, and that during the next program  
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.  
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  
COMPUTED ENERGY MANAGEMENT  
RECOVERY (EMR) - The thermostat's mi-  
crocomputer automatically calculates the  
timeitwilltaketochangethetemperatureto  
the next program setting. Then the thermo-  
stat will activate the heating or cooling sys-  
tem to change the temperature so that the  
desired temperature is reached at the be-  
ginning of the next program period. As an  
example of this feature, assume that you  
have programmed your thermostat to pro-  
vide an overnight heating temperature of  
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12  
power. If the switch is OFF (down), use a  
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, put the thermostat back on the wall,  
and restore 24 VAC power. To set the  
thermostat for automatic changeover after  
SYSTEM  
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 highest 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).  
programming, press  
to set the ther-  
HEAT  
-
OFF  
-
COOL - AUTO  
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.  
79  
78  
77  
76  
COOLING TEMPERATURES  
DEAD BAND 1°F  
75  
HEATING TEMPERATURES  
74  
73  
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13  
TWO HOUR TEMPERATURE OVER-  
RIDE — Press or until the  
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.  
HOLD TEMPERATURE — The thermostat  
can hold any temperature within its range  
for an indefinite period, without reverting to  
HOLD  
"ADVANCE PROGRAM" BUTTON —  
ADV  
PRGM  
Press  
to advance the thermostat pro-  
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.  
TIME  
°F/°C CONVERTIBILITY — Press  
FWD  
TIME  
BACK  
and  
at the same time until the tem-  
the program. Press  
displayed. Then choose the desired hold  
temperature by pressing or  
. HOLD will be  
TEMP  
perature display is in °C (Celsius). To dis-  
play °F, repeat the process.  
.
ADJUSTABLE HEATING AND COOLING  
CYCLE TIMES (ANTICIPATION) — If the  
heating/cooling system is turning on and off  
too often (short cycles) or not often enough  
(long cycles), you may want to adjust the  
anticipation setting.  
The thermostat will hold the room tempera-  
ture at the selected setting until you press  
RUN  
PRGM  
to start program operation again. This  
featureisidealforenergyconservationwhen  
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14  
cycletime.Tosetcoolinganticipation,press  
CAUTION  
!
SET  
CLOCK  
SET  
DAY  
and  
at the same time again. The  
A cooling anticipation setting of less  
than 10 may cause decreased compres-  
sor life.  
display will show COOL 14 (factory  
preprogrammed cooling anticipation). Use  
TIME  
FWD  
TIME  
BACK  
the  
and  
buttons to adjust antici-  
to return to your pro-  
SET  
CLOCK  
SET  
DAY  
To adjust anticipation, press  
and  
RUN  
PRGM  
pation. Press  
gram.  
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.  
LOW BATTERY INDICATOR — The word  
BAT will flash on the display if the 9 volt  
alkaline battery is low and should be re-  
placed.  
AUDIO PROMPTING — Each time you  
pressabutton,thethermostatwillbeep(this  
feature works only when the thermostat is  
attached to the wall and 24 VAC power is  
present to the thermostat).  
TIME  
FWD  
If the heat cycles are too short, press  
to increase the cycle time. If the heat cycles  
TIME  
BACK  
are too long, press  
to decrease the  
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15  
BACKLIT DISPLAY — When you press  
any button on the thermostat, the display is  
lit for approximately eight seconds (this fea-  
ture 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.  
COMPRESSORSHORTCYCLEPROTEC-  
TION — To protect your compressor from  
potential damage due to rapid cycling, this  
thermostat has a built-in delay of 5 minutes  
between cooling cycles. The blower 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 CONTROL  
— You may program the fan blower to run  
continuously during any given program pe-  
riod, regardless of the cycling of the heating  
or cooling system. During programming,  
after entering the time and temperature for  
FAN  
a) Return of power after a power outage.  
the time period, press  
until FAN  
ON - AUTO  
SYSTEM  
COOL AUTO  
b) Pressing  
modes.  
to change operating  
HEAT  
-
OFF  
-
-
appears. To override constant fan, press  
FAN  
ON - AUTO  
until FAN  
appears.  
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16  
PROGRAMMINGYOURTHERMOSTAT  
Now you are ready to program your thermostat.  
This section will help you plan and program your  
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 Fri-  
day, and the two-day program is set to run  
SaturdayandSunday.However,youmaychoose  
any five consecutive days to be your weekday  
program days (such as Sunday through Thurs-  
day; in this case, your weekend program would  
run on Friday and Saturday).  
For maximum comfort and efficiency, keep the  
following guidelines in mind when planning your  
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.  
First, youshouldanswerthefollowingquestions  
to help you decide what your needs are. If you  
are using the thermostat for a commercial appli-  
cation (a store, office building, etc.), answer  
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17  
questions 1 through 4. If you are using the 3a. What time do the building occupants reach  
thermostat in your home, answer questions 5  
through 8. Keep in mind that you should plan for  
both weekday and weekend programs.  
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:  
1a. What time does the first person arrive at the  
building in the morning?  
b. What temperature should the building be at  
this time? (heating? cooling?) These will be  
your MOR (morning) temperature settings.  
4a. What time does the building become va-  
cant?  
b. What temperature should the building be at  
this time? These will be your NHT (night)  
temperature settings.  
2a. What time do the building occupants reach  
amaximumactivitylevel(usinglights,equip-  
ment, meeting rooms, etc.)?  
b. What temperature should the building be at  
this time? These will be your DAY tempera-  
ture settings.  
IN YOUR HOME:  
5a. What time does the first person get up in the  
morning?  
b. What temperature should the house be at  
this time? These will be your MOR (morn-  
ing) temperature settings.  
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18  
6a. What time does the last person leave the Now look at the factory preprogrammed times  
house in the morning?  
and temperatures shown at the top of the next  
page. If this program will suit your needs, simply  
b. What temperature should the house be at  
this time? These will be your DAY tempera-  
ture settings.  
RUN  
PRGM  
press  
to begin running the factory preset  
program.  
7a. What time does the first person arrive home  
in the evening?  
b. What temperature should the house be at  
this time? These will be your EVE (evening)  
temperature settings.  
If you want to change the preprogrammed times  
and temperatures, do the following.  
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).  
8a. What time does the last person go to bed at  
night?  
b. What temperature should the house be at  
this time? These will be your NHT (night)  
temperature settings.  
79  
78  
COOLING TEMPERATURES  
77  
76  
DEAD BAND 1°F  
75  
HEATING TEMPERATURES  
74  
73  
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19  
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 MOR heating start time and temperature, and  
cooling temperatures for your weekday pro- choose 7:00 AM and 76° as the weekday MOR  
gram. You must program 4 periods for each day cooling start time and temperature). Use the  
(MOR, DAY, EVE, and NHT). However, you following table to plan your program time peri-  
mayusethesameheatingandcoolingtempera- ods,andthetemperaturesyouwantduringeach  
tures for consecutive time periods. You can period. You may also want to look at the sample  
choose start times, heating temperatures, and program table to get an idea of how the thermo-  
cooling temperatures independently for both stat can be programmed.  
weekday and weekend programs (for example,  
youmayselect5:00AMand70° astheweekday  
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20  
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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21  
SAMPLE  
Heating/Cooling Schedule Plan  
WEEKEND (2 DAY)  
WEEKDAY (5 DAY)  
Start  
Time  
Start  
Time  
Temperature  
68°  
Temperature  
68°  
MOR HEAT  
DAY HEAT  
EVE HEAT  
NHT HEAT  
MOR COOL  
DAY COOL  
EVE COOL  
NHT COOL  
5:30 AM  
7:30 AM  
2:00 PM  
6:00 PM  
12:00 AM  
8:00 AM  
2:00 PM  
6:00 PM  
12:00 AM  
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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22  
Set Current Time and Day  
ENTERING YOUR PROGRAM  
SET  
CLOCK  
Follow these steps to enter the heating and  
cooling programs you have selected.  
1. Press  
once. The display will show  
minutes only.  
EXAMPLE:  
NOTE  
TIME  
FWD  
TIME  
BACK  
2. Press and hold either  
or  
until you  
We recommend that you remove the thermostat  
from the wall for programming (especially for  
entering cooling programming). A fresh 9 volt  
Energizer® alkaline battery must be installed to  
perform off-wall programming. BE SURE SYS-  
TEM SWITCH IS SET TO OFF POSITION BE-  
FORE REATTACHING THERMOSTAT TO  
SUBBASE!  
reach the correct minutes.  
SET  
CLOCK  
3. Press  
once. The display window will  
show the hour only.  
EXAMPLE:  
TIME  
FWD  
TIME  
BACK  
4. Press and hold either  
or  
until you  
reachthecorrecthourandAM/PMdesigna-  
tion (AM begins at midnight; PM begins at  
noon).  
NOTE  
You cannot program the thermostat with the  
SYSTEM SWITCH in the AUTO position.  
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23  
youareatthepointwhereyoustoppedprogram-  
ming. Then you may continue to enter your  
programs normally. If you want to stop program-  
RUN  
SET  
DAY  
5. Press  
once. The display will show the  
day of the week as an abbreviation (MO for  
Monday, TU for Tuesday, etc.).  
ming at any time, simply press  
to resume  
PRGM  
TIME  
FWD  
TIME  
BACK  
6. Press and hold either  
or  
until you  
program operation.  
reach the current day of the week.  
SYSTEM  
COOL AUTO  
RUN  
PRGM  
1. Press  
2. Press  
until HEAT is displayed.  
HEAT  
-
OFF  
-
-
7. Press  
once. The display will show the  
VIEW  
PRGM  
correct time and room temperature alter-  
nately.  
once. 5 DAY (indicating week-  
day program), and MOR, representing the  
morning heating period, will appear in the  
display. Also displayed are the currently  
programmed start time for the MOR period  
and the currently programmed tempera-  
ture.  
Enter Heating Program  
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-  
natingtime/temperaturedisplay.Toresumepro-  
VIEW  
EXAMPLE:  
5 DAY  
This display window shows that for the  
weekday MOR period, the start time is 5:00  
gramming after this happens, press  
until  
PRGM  
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24  
AM, and 70° is the programmed tempera- 7. Repeat steps 3 through 5 to select the start  
ture (this example reflects factory prepro-  
gramming).  
time and heating temperature for the week-  
day DAY program.  
8. Repeat steps 3 through 7 for the weekday  
EVE and NHT heating programs.  
3. To change the displayed start time to your  
selected start time for weekday MOR heat  
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).  
10. When you have completed entering your  
RUN  
TIME  
FWD  
TIME  
BACK  
program, press  
or  
until your  
selectedtimeappears. Thetimewillchange  
in 15 minute increments.  
4. Press  
or  
until you reach your  
selected weekday MOR heating tempera-  
ture.  
heating program, press  
.
PRGM  
5. If you want the fan to run continuously  
FAN  
ON - AUTO  
during this period, press  
until FAN  
is displayed.  
VIEW  
PRGM  
6. Press  
.Thecurrentlyprogrammedstart  
time and heating temperature for weekday  
DAY will be displayed.  
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25  
Enter Cooling Program  
SYSTEM  
OFF COOL AUTO  
1. Press  
until COOL appears.  
HEAT  
-
-
-
CAUTION  
!
2. Enter your cooling program by following the  
procedure for entering your heating pro-  
gram.  
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  
mustbeinstalledtoperformoff-wallpro-  
gramming Programming away from the  
wallshouldpreventaccidentalcompres-  
sor 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  
COOL AUTO  
1. Press  
until HEAT is displayed.  
HEAT  
-
OFF  
-
-
VIEW  
PRGM  
2. Press and hold  
to view the heating  
period times and temperatures in sequence  
for weekday MOR, DAY, EVE, and NHT,  
then for weekend MOR, DAY, EVE, and  
NHT.  
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26  
SYSTEM  
COOL AUTO  
RUN  
PRGM  
3. Press  
4. Press  
.
Press  
until OFF is displayed. Reattach  
HEAT  
-
OFF  
-
-
SYSTEM  
COOL AUTO  
SYSTEM  
COOL AUTO  
thermostat to subbase. Then press  
to  
HEAT  
-
OFF  
-
-
until COOL is displayed.  
HEAT  
-
OFF  
-
-
select the operation mode you want (HEAT,  
5. Repeat step 2 to check cooling tempera-  
tures.  
FAN  
COOL, AUTO). Press  
until FAN  
is  
ON - AUTO  
RUN  
PRGM  
displayed (automatic cycling).  
6. Press  
to begin program operation.  
YOURTHERMOSTATISNOWCOMPLETELY  
PROGRAMMEDANDREADYTOAUTOMATI-  
CALLYPROVIDEMAXIMUMCOMFORTAND  
EFFICIENCY!  
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27  
QUESTIONS AND ANSWERS  
1. How can I permanently change a part of 3. How can I finish my programming if the  
my program?  
display has already changed to time/  
temperature?  
VIEW  
PRGM  
Press  
until you reach the time/tem-  
During programming, if no buttons are  
pressed for five minutes, the thermostat will  
enter the HOLD mode and maintain a con-  
stant temperature. The display will change  
to the time/temperature mode. To resume  
VIEW  
perature schedule you want. Then press  
TIME  
FWD  
TIME  
BACK  
or  
and  
and  
tochange  
the program. See PROGRAMMING YOUR  
THERMOSTAT.  
programming, press  
until you return to  
PRGM  
2. How can I have no change in tempera-  
ture from one time period to another?  
Simply select the same temperature for  
eachconsecutivetimeperiod. Forexample,  
you may select the same weekday EVE  
cooling temperature as you did for weekday  
DAY, which means the temperature will not  
change when the EVE period begins. See  
PROGRAMMING YOUR THERMOSTAT.  
the point where you stopped programming.  
Then you may continue to program the  
thermostat normally. If you want to stop  
RUN  
programming at this point, press  
to  
PRGM  
startthenormalprogramfunction.SeePRO-  
GRAMMING YOUR THERMOSTAT.  
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28  
4. What happens if the electricity goes off 5. Why can’t I program the thermostat in  
or is manually shut off?  
the AUTO mode?  
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  
thermostat will maintain a heating tempera-  
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.  
The thermostat can only be programmed in  
the HEAT and COOL modes. See PRO-  
GRAMMING YOUR THERMOSTAT.  
6. What can cause the thermostat display  
to freeze or go blank?  
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.  
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29  
To correct this, remove the thermostat from 7. Why won’t the setpoint temperature go  
the wall and disconnect the battery. Wait  
about one minute, then reconnect the bat-  
tery. Thethermostatwillreverttothefactory  
preset program until you reprogram the  
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  
COOL AUTO  
the thermostat immediately, press  
HEAT  
-
OFF  
-
-
until OFF is displayed and replace the ther-  
RUN  
PRGM  
mostat on the wall. Then press  
to  
begin the factory preset program. Or you  
may reprogram the thermostat, then re-  
place 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.  
8. Why doesn’t the display light come on  
when I press a button? Why don’t I hear  
a beep when I press a button?  
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30  
Thedisplaylightandaudioprompting(beep)  
onlyworkwhenthethermostatisonthewall  
and 24 VAC power is present to the thermo-  
stat. These features will not work on battery  
power alone. See OPERATING YOUR  
THERMOSTAT.  
systemisstillnotrunning, readthefollowing  
cautionary statement. Then, if conditions  
permit, use the  
or  
buttons to  
move the temperature above or below the  
setpoint temperature. See OPERATING  
YOUR THERMOSTAT.  
9. The display is flashing BAT. What does  
this mean?  
CAUTION  
!
If the outside temperature is below 50°F,  
The 9 volt battery installed in the thermostat  
is low and should be replaced with a fresh 9  
voltEnergizer® alkalinebattery. SeeOPER-  
ATING YOUR THERMOSTAT.  
DONOTusethe buttontomovethe  
temperaturebelowthesetpointtempera-  
ture. Property damage may result due to  
compressor slugging.  
10. Why won’t the system turn on, even  
though the thermostat display is func-  
tioning normally?  
11. Why doesn’t the temperature change at  
the time I programmed?  
Either the compressor lockout feature is in  
operation or the thermostat is not currently  
callingforheatorcool.Waitabout5minutes  
for the compressor lockout to expire. If the  
There may be a number of causes for this  
situation. The following are primary rea-  
sons.  
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31  
TheEMRfunctionisoperating.TheEMR 12. Why does the blower fan keep running  
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.  
after the system has turned off?  
You have programmed the fan to run  
continuously during this period. See  
PROGRAMMING YOUR THERMO-  
STAT.  
You have programmed the incorrect day  
or time. Check your programming (be  
sure that the times you programmed are  
correct AM or PM times). See PRO-  
GRAMMING YOUR THERMOSTAT.  
The thermostat is in the HOLD mode.  
RUN  
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.  
13. Why is the system turning on and off so  
frequently (seldom)?  
Press  
to start program operation.  
PRGM  
See OPERATING YOUR THERMO-  
STAT.  
The anticipation setting is too low (high). To  
change anticipation settings, see OPER-  
ATING YOUR THERMOSTAT.  
The compressor lockout feature is oper-  
ating; wait about 5 minutes for system to  
begin running. SeeOPERATING YOUR  
THERMOSTAT.  
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32  
14. Between heating and cooling seasons, I 15. I live in an area where daylight savings  
want to turn my system off. Can I do this  
withoutaffectingmythermostatprogram-  
ming?  
time is observed. How do I change the  
thermostat clock twice a year without  
affecting thermostat programming?  
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.  
Any time you wish to turn your system off,  
SYSTEM  
COOL AUTO  
simply press  
until the display shows  
HEAT  
-
OFF  
-
-
OFF. This will not affect your thermostat's  
programming in any way. To turn the sys-  
SYSTEM  
tem back on, press  
until HEAT,  
HEAT  
-
OFF  
-
COOL - AUTO  
16. Do I have to reprogram my thermostat  
after I change the battery?  
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.  
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, or if the thermostat is removed from the  
wall, the program will be retained for ap-  
proximately one minute if there is no bat-  
tery installed or if the installed battery is  
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33  
dead. If you are changing the battery after  
seeing a flashing BAT on the display, the  
installedbatterymaybedead.Ifyouremove  
the old battery and install a fresh one within  
one minute, you should not lose your ther-  
mostat programming. After installing a new  
battery, follow the procedures in CHECK  
YOUR PROGRAMMING to determine  
whetheryourprogrammingwasmaintained.  
If the thermostat maintains programming,  
SYSTEM  
COOL AUTO  
press  
until OFF is displayed, put the  
HEAT  
-
OFF  
-
-
SYSTEM  
COOL AUTO  
thermostat back on the wall, press  
HEAT  
-
OFF  
-
-
again to select the operating mode you  
RUN  
PRGM  
want, then press  
to start program  
operation. If the program is lost, reprogram  
the thermostat. See PROGRAMMING  
YOUR THERMOSTAT.  
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34  
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35  
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. 37-5518A  
9523  
ST. LOUIS, MISSOURI 63123-5398  
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