OPERATION GUIDE
1F91W-71
Multi-stage Electronic Digital
Thermostat
WHITE-RODGERS
Operator: Save this booklet for future use!
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!
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)
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.
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
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.
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).
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
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
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
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
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
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
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
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.
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
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.
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
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
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
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°
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.
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
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.
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.
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!
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.
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.
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?
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.
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.
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
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.
34
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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