OPERATION GUIDE
1F90-51
5 Day/2 Day 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 .................................... 19
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................. 29
Operator: Save this
booklet for future use!
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3
YOUR NEW THERMOSTAT’S FEATURES
• Separate5-day(weekday)and2-day(week-
• Adjustable cycle times
end) setback programming
• Compressor short cycle protection
• Programmable blower control
• Blower delay in the cooling cycle
• Audio and visual prompting during operation
• Two hour temperature override
• Simultaneousheatandcoolprogramstorage
• Fourseparatetime/temperaturesettingsper
24-hour period
• Computed Energy Management Recovery
(EMR)
• Manual program override (HOLD tempera-
ture)
• Armchair programming capability
• Backlit LCD displays continuous set point,
time, and room temperature
• 1.5 volt “AA” Energizer® alkaline battery
• “Advance Program” key
• °F/°C convertibility
• Temperature range 40° to 99°F
backup
• Preprogrammed temperature control
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4
OPERATING YOUR THERMOSTAT
Before you begin programming your thermo- The subbase is attached to the wall, but you can
stat, you should be familiar with its features and remove the thermostat body for easy program-
with the display and the location and operation ming. To remove the thermostat body from the
of the thermostat buttons. The information in subbase, grasp the thermostat body and gently
this section will help you become familiar with pull it straight out from the subbase. To attach
your new thermostat so that you can easily the thermostat body, line up the two terminal
program it.
pins on the lower section of the thermostat back
with the matching connector on the subbase.
Insert these, then gently pivot the thermostat
body up to connect the six pin connectors on the
upper portion of the thermostat back. Gently
push until the snap connectors 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
!
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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If the word BATTERY is flashing in the display
window, the batteries are low and should be
replaced with fresh “AA” Energizer® alkaline
batteries.
PARTS OF THE THERMOSTAT
The Back of The Thermostat Body
Turn the thermostat body over. On the back are
the 3 “AA” Energizer® alkaline batteries.
CAUTION
!
The “AA” Energizer® alkaline batteries provide
powertothethermostatwhenthe24 VACpower
is interrupted (for example, when you remove
the thermostat from the wall for programming).
Fresh batteries will maintain the stored program
for approximately a year. If power loss is long
enough for the program to be lost, the thermo-
stat will automatically return to the factory pro-
grammed temperatures (64°F heating and 82°F
cooling) when power is restored. You must
reprogram the thermostat if this happens.
SYSTEM
SWITCH
Use
to turn the thermostat OFF
beforeremovingthethermostatfromthe
wall to replace batteries.
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Other than
and
, the buttons are
Batteries
6-pin connector
locatedbehindthethermostatdoor. Toopenthe
door, put your fingernail in the indentation at the
topofthedoor,thenpullthedooroutfromthetop
and swing it down on its hinges.
On the following pages there are brief descrip-
tions of the display and the thermostat buttons.
2-pin connector
BACK OF THERMOSTAT BODY
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7
The Display
The word BATTERY flashes on the display
5
6
when the “AA” alkaline batteries are weak
and should be replaced. The word BAT-
TERY is displayed continuously (non-flash-
ing) when thermostat is running on battery
power only.
Continuouslydisplayssystemmode(HEAT,
1
2
OFF,COOL, HOLD).Duringprogramming,
theprogramperiodisdisplayed(MOR,DAY,
EVE, or NHT).
Alternately displays room temperature (F
FAN ON is displayed when the blower is
denotesdegreesFahrenheitand Cdenotes
degrees Celsius) and time of day (A de-
notes AM time and P denotes PM time).
operating continuously. FAN AUTO is dis-
playedduringautomaticfanoperation(when
theblowercycleswiththeheatingorcooling
system).
Displays the setpoint temperature.
3
4
5 DAY indicates that the displayed program
is the weekday program. 2 DAY indicates
that the displayed program is the weekend
program.
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8
5 DAY
FAN AUTO
WHITE-RODGERS
DIGITAL COMFORT SET II
TIME
FWD
SET
VIEW
HOLD
TEMP
SYSTEM
SWITCH
CLOCK
PRGM
HEAT-OFF-COOL-AUTO
FAN
SWITCH
TIME
SET
DAY
RUN
ADV
BACK
PRGM
PRGM
ON-AUTO
1
2
3
3
2 DAY
FAN AUTO
5 DAY
FAN ON
BATTERY
4
6
4
6
2
5
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9
The Thermostat Buttons
Used to initiate or review thermostat pro-
gramming.
12
13
Sets the system mode (HEATing, OFF, or
COOLing).
7
8
Used to start program operation after pro-
gramming.Alsousedtoreturnthermostatto
program operation after being in HOLD
mode.
Selects fan operation (see #6, above). This
button is also used to program the fan to run
continuously during a program period.
Used to manually override programming to
14
15
16
Runs display forward or backward through
9
holdataselectedtemperature(whenHOLD
is displayed).
time, day, or anticipation settings during
programming.
TIME
FWD
TIME
Used to advance thermostat program to the
Used with
Used with
and
and
to set current time.
10
11
BACK
next program period (for example, from the
MOR program to the DAY program).
TIME
FWD
TIME
to set the day of the
BACK
SET
(Red arrow)
Raises temperature set-
week. Also used in conjunction with
enter anticipation setting mode.
to
CLOCK
ting (99°F or 37°C maximum).
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10
(Blue arrow)
Lowers temperature set-
Theredindicatorlightglowswheneverheat-
ing, cooling, or fan are in operation.
17
18
ting (40°F or 4°C minimum).
17 16
18
5 DAY
FAN AUTO
WHITE-RODGERS
DIGITAL COMFORT SET II
TIME
FWD
SET
VIEW
HOLD
TEMP
SYSTEM
SWITCH
7
8
CLOCK
PRGM
HEAT-OFF-COOL-AUTO
FAN
SWITCH
TIME
SET
DAY
RUN
ADV
BACK
PRGM
PRGM
ON-AUTO
9
10 11 12 13 14 15
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next program period, beginning at 6:00 AM,
you have programmed a temperature of
70°F. The thermostat will automatically ac-
tivate 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
microcomputer can be set to automatically
calculate the time it will take to change the
temperature to the next program setting.
Then the thermostat will activate the heat-
ing or cooling system to change the tem-
perature so that the desired temperature is
reached at the beginning of the next pro-
gram period. As an example of this feature,
assume that you have programmed your
thermostat to provide an overnight heating
temperature of 62°F, and that during the
The thermostat is configured at the factory
so that this feature is disabled. If you wish to
have this feature, refer to the installation
instructions for this thermostat, or contact
your local heating/cooling contractor.
• TWO HOUR TEMPERATURE OVER-
RIDE — Press
or
until the dis-
play shows the temperature you want. The
thermostat will override current program-
ming and keep the room temperature at the
selected temperature for two hours. After
two hours, the thermostat will automatically
revert to the program.
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• HOLD TEMPERATURE — The thermostat
can hold any temperature within its range
for an indefinite period, without reverting to
HOLD
key while in the DAY program will advance
the thermostat to the EVE program, which
will remain in effect until the NHT program
begins).
the program. Press
. HOLD will be dis-
TEMP
TIME
• °F/°C CONVERTIBILITY — Press
and
played. Then choose the desired hold tem-
perature by pressing or . The
thermostat will hold the room temperature
FWD
TIME
at the same time until the temperature
BACK
display is in °C (Celsius). To display °F,
RUN
at the selected setting until you press
to
PRGM
repeat the process.
start program operation again. This feature
is ideal for energy conservation when the
building is unoccupied for an extended pe-
riod of time.
• 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.
• “ADVANCE PROGRAM” KEY — Press
ADV
to change the thermostat to the next
PRGM
program period. This will temporarily over-
ride the program, until the next program
period begins (for example, pressing this
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TIME
CAUTION
heat cycles are too long, press
to de-
!
BACK
Acoolinganticipationsettingoflessthan
10maycausedecreasedcompressorlife.
creasethecycletime. Toset coolingantici-
SET
SET
DAY
pation, press
and
at the same time
CLOCK
SET
again. The display will show COOL 14 (fac-
tory preprogrammed cooling anticipation).
Youmayselectanyanticipationsettingfrom
To adjust heat anticipation, press
and
CLOCK
SET
at the same time. The display will show
DAY
TIME
FWD
TIME
HEAT 5 (this is the factory preprogrammed
heating anticipation setting). You may se-
lect any anticipation setting from 2 to 40
(note that for hydronic systems, a mini-
mum anticipation setting of 15 is recom-
mended).Wheneveradjustinganticipation,
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. If the heat cycles are too short,
TIME
4 to 40. Use
tion. Press
and
to adjust anticipa-
BACK
RUN
PRGM
to return to your program.
• LOW BATTERY INDICATOR — The word
BATTERY will flash on the display if the
“AA” alkaline batteries are low and should
be replaced. The word BATTERY will be
displayedcontinuously(non-flashing)when
24 VAC power is not being supplied to the
thermostat and the thermostat is operating
on battery power only.
press
to increase the cycle time. If the
FWD
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• AUDIO PROMPTING — Each time you
press a button, the thermostat will beep.
• 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 following may
cause a time delay in COOL:
• BACKLIT DISPLAY — When you press
any button on the thermostat, the display is
lit for approximately eight seconds.
• SYSTEM INDICATOR LIGHT — The red
lightontheupperrightpartofthethermostat
indicatessystemoperation(seePARTSOF
THE THERMOSTAT).
a) Return of power after a power outage.
SYSTEM
SWITCH
b) Pressing
modes.
to change operating
c) Pressing
, creating a call for COOL
too soon after a previous call.
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PROGRAMMINGYOURTHERMOSTAT
Now you are ready to program your thermostat.
This section will help you plan your thermostat’s
program to meet your needs.
PLANNING FOR YOUR NEEDS
First, answer the following questions to help you
decide what your needs are. If you are using the
thermostatforacommercialapplication(astore,
officebuilding,etc.),answerquestions1through
4. If you are using the thermostat in your home,
answer questions 5 through 8.
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.
FOR COMMERCIAL APPLICATIONS:
1a. What time does the first person arrive at the
building in the morning?
• During early morning hours, the need for
cooling is usually minimal.
b. What temperature should the building be at
this time? (heating? cooling?) These will be
your MOR (morning) temperature settings.
2a. What time do the building occupants reach
amaximumactivitylevel(usinglights,equip-
ment, meeting rooms, etc.)?
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b. What temperature should the building be at
this time? These will be your DAY tempera-
ture settings.
b. What temperature should the house be at
this time? These will be your MOR (morn-
ing) temperature settings.
3a. What time do the building occupants reach 6a. What time does the last person leave the
a minimum activity level (limited personnel
in building)?
house in the morning?
b. What temperature should the house be at
this time? These will be your DAY tempera-
ture settings.
b. What temperature should the building be at
thistime? ThesewillbeyourEVE (evening)
temperature settings.
7a. What time does the first person arrive home
in the evening?
4a. What time does the building become va-
cant?
b. What temperature should the house be at
thistime? ThesewillbeyourEVE (evening)
temperature settings.
b. What temperature should the building be at
this time? These will be your NHT (night)
temperature settings.
8a. What time does the last person go to bed at
night?
IN YOUR HOME:
b. What temperature should the house be at
this time? These will be your NHT (night)
temperature settings.
5a. What time does the first person get up in the
morning?
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Now look at the factory preprogrammed times choose start times, heating temperatures, and
and temperatures shown below. If this program cooling temperatures independently for both
weekday and weekend programs (for example,
RUN
will suit your needs, simply press
to begin
PRGM
youmayselect5:00AMand70° astheweekday
MOR heating start time and temperature, and
choose 7:00 AM and 76° as the weekday MOR
cooling start time and temperature).
running the factory preset program.
If you want to change the preprogrammed times
and temperatures, do the following.
Use the following table to plan your program
time periods, and the temperatures you want
duringeachperiod. Youmayalsowanttolookat
the sample program table to get an idea of how
the thermostat can be programmed.
Determine the time periods and heating and
cooling temperatures for your weekday pro-
gram. You must program 4 periods for each day
(MOR, DAY, EVE, and NHT). However, you
mayusethesameheatingandcoolingtempera-
tures for consecutive time periods. You can
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
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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°F
7:00 AM
11:00 AM
6:00 PM
11:30 PM
7:00 AM
12:30 PM
6:00 PM
11:30 PM
68°F
8:00 AM
5:00 PM
10:30 PM
6:30 AM
2:00 PM
5:00 PM
10:30 PM
65°F
70°F
65°F
76°F
78°F
72°F
78°F
70°F
70°F
65°F
76°F
74°F
72°F
78°F
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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 min-
CLOCK
utes only.
NOTE
EXAMPLE:
We recommend that you remove the thermostat
from the wall for programming (especially for
entering cooling programming). Fresh “AA” En-
ergizer® alkaline batteries must be installed to
perform off-wall programming. BE SURE TO
SYSTEM
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:
USE
TO TURN THERMOSTAT OFF
SWITCH
BEFORE REATTACHING THERMOSTAT TO
SUBBASE!
TIME
FWD
TIME
4. Press and hold either
or
until you
BACK
reachthecorrecthourandAM/PMdesigna-
tion (AM begins at midnight; PM begins at
noon).
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21
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
6. Press and hold either
or
until you
BACK
program operation.
reach the current day of the week.
SYSTEM
SWITCH
1. Press
2. Press
until HEAT is displayed.
RUN
7. Press
once. The display will show the
PRGM
VIEW
once.5DAY(indicatingweekday
PRGM
correct time and room temperature alter-
nately.
program),andMOR,representingthemorn-
ing heating period, will appear in the dis-
play. Also displayed are the currently pro-
grammed start time for the MOR period and
the currently programmed temperature.
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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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.
3. To change the displayed start time to your 8. Repeat steps 3 through 7 for the weekday
selected start time for weekday MOR heat
EVE and NHT heating programs.
TIME
FWD
TIME
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).
program, press
or
until your se-
BACK
lected time appears. The time will change in
15 minute increments.
4. Press
or
until you reach your
selectedweekdayMORheatingtemperature.
10. When you have completed entering your
5. If you want the fan to run continuously
RUN
heating program, press
.
PRGM
FAN
during this period, press
FAN is displayed.
VIEW
until PRG
SWITCH
6. Press PRGM . The currently programmed start
time and heating temperature for weekday
DAY will be displayed.
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23
Enter Cooling Program
SYSTEM
SWITCH
1. Press
until COOL appears.
CAUTION
!
2. Followtheprocedureforenteringyourheat-
ing program, using your selected cooling
times and temperatures.
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
conditionercompressorslugging.Fresh
“AA” Energizer® alkaline batteries must
be installed to perform off-wall program-
ming. Programming away from the wall
should prevent accidental compressor
SYSTEM
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 sequence
for weekday, then weekend MOR, DAY,
EVE, and NHT program periods.
operation. USE
TO TURN THER-
SWITCH
MOSTAT OFF BEFORE REATTACHING
THE THERMOSTAT TO THE SUBBASE!
RUN
3. Press
.
PRGM
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24
SYSTEM
SWITCH
SYSTEM
SWITCH
4. Press
until COOL is displayed.
Press
until OFF is displayed. Reattach
thermostat to subbase. Turn on power to the
5. Repeat step 2 to check cooling tempera-
tures.
SYSTEM
system. Thenpress
toselecttheopera-
SWITCH
RUN
tion mode you want (HEAT or COOL). Press
6. Press
to begin program operation.
PRGM
FAN
SWITCH
until FAN AUTO is displayed (auto-
YOURTHERMOSTATISNOWCOMPLETELY
PROGRAMMEDANDREADYTOAUTOMATI-
CALLYPROVIDEMAXIMUMCOMFORTAND
EFFICIENCY!
matic cycling).
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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
untilyoureachthetime/tempera-
PRGM
3. How can I finish my programming if the
display has already changed to time/
temperature?
TIME
FWD
ture schedule you want. Then press
or
TIME
and
and
to change the
BACK
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
program. See PROGRAMMING YOUR
THERMOSTAT.
2. How can I have no change in tempera-
ture from one time period to another?
programming, press
until you return to
PRGM
Simply select the same temperature for
eachconsecutivetimeperiod. Forexample,
you may select the same weekday EVE
cooling temperature as you did for weekday
the point where you stopped programming.
Then you may continue to program the
thermostat normally. If you want to stop
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26
power present to the thermostat. See OP-
ERATING YOUR THERMOSTAT.
RUN
programmingatthispoint, press
tostart
PRGM
the normal program function. See PRO-
GRAMMING YOUR THERMOSTAT.
5. What can cause the thermostat display
to freeze or go blank?
4. What happens if the electricity goes off
or is manually shut off?
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.
If you have not installed 3 “AA” alkaline
batteries, the display will go blank and the
program will be lost in approximately one
minute. When electricity is restored, the
clock will reset itself to 12:00 PM (noon) and
the thermostat will maintain a heating tem-
perature of 64°F and a cooling temperature
of 82°F until you reenter your program.
Setpoint temperature will not be displayed.
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
the wall and disconnect the battery. Wait
about one minute, then reconnect the bat-
If fresh “AA” Energizer® alkaline batteries
are installed, the program will be main-
tained for about one year with no 24 VAC
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27
tery. Thethermostatwillreverttothefactory
preset program until you reprogram the
thermostat. If you don’t want to reprogram
SYSTEM
fresh“AA”Energizer® alkalinebatteries.See
OPERATING YOUR THERMOSTAT.
7. The display shows a continuous (non-
flashing) BATTERY. What does this
mean?
the thermostat immediately, press
SWITCH
until OFF is displayed and replace the ther-
The thermostat is not being supplied with
24 VAC power. The thermostat is operating
on battery power alone. See OPERATING
YOUR THERMOSTAT.
RUN
mostat on the wall. Then press
to begin
PRGM
the factory preset program. Or you may
reprogramthethermostat,thenreplaceiton
the wall.
8. Why won’t the compressor turn on, even
though the thermostat display is func-
tioning normally?
To prevent further static discharge prob-
lems, touch another object to release static
build-up before touching the thermostat.
See OPERATING YOUR THERMOSTAT.
Either the compressor lockout feature is in
operation or the thermostat is not currently
calling for cool. Wait about 5 minutes for the
compressor lockout to expire. If the system
isstillnotrunning,readthecautionarystate-
ment below. Then, if conditions permit,
6. The display is flashing BATTERY. What
does this mean?
The “AA” batteries installed in the thermo-
stat are low and should be replaced with
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28
use the
button to move the tempera-
programperiod.SeeOPERATINGYOUR
THERMOSTAT.
ture below the setpoint temperature. See
OPERATING YOUR THERMOSTAT.
•
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.
CAUTION
!
If the outside temperature is below 50°F,
DO NOT use the button to move the
temperaturebelowthesetpointtempera-
ture. Property damage may result due to
compressor slugging.
•
•
The thermostat is in the HOLD mode.
RUN
Press
tostartprogramoperation.See
PRGM
OPERATING YOUR THERMOSTAT.
9. Why doesn’t the temperature change at
the time I programmed?
The compressor lockout feature is oper-
ating; wait about 5 minutes for system to
begin running. See OPERATING YOUR
THERMOSTAT.
There may be a number of causes for this
situation. The following are primary reasons.
•
The EMR function is operating. The EMR
functionwillbringonthesystemautomati-
cally to bring the temperature to the se-
lected level by the beginning of the next
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29
10. Why does the blower fan keep running 12. Between heating and cooling seasons, I
after the system has turned off?
want to turn my system off. Can I do this
withoutaffectingmythermostatprogram-
ming?
•
You have programmed the fan to run
continuouslyduringthisperiod.SeePRO-
GRAMMING YOUR THERMOSTAT.
Any time you wish to turn your system off,
SYSTEM
SWITCH
•
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.
simplypress
untilthedisplayshows
OFF. This will not affect your thermostat’s
programming in any way. To turn the sys-
SYSTEM
tem back on, press
until HEAT,
SWITCH
11. Why is the system turning on and off so
frequently (seldom)?
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.
The anticipation setting is too low (high). To
change anticipation settings, see OPER-
ATING YOUR THERMOSTAT.
13. I live in an area where daylight savings
time is observed. How do I change the
thermostat clock twice a year without
affecting thermostat programming?
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30
To change your clock, follow the instruc-
tions for setting current time and day. See
ENTERING YOUR PROGRAM. Thermo-
stat programming is not affected when you
change the clock.
If you remove the old batteries and install
fresh ones within one minute, you should
not lose your thermostat programming. Af-
terinstallingnewbatteries, followtheproce-
dures in CHECK YOUR PROGRAMMING
to determine whether your programming
wasmaintained. Ifthethermostatmaintains
SYSTEM
14. Do I have to reprogram my thermostat
after I change the batteries?
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 are no
batteriesinstalledoriftheinstalledbatteries
are dead. If you are changing the batteries
after seeing a flashing BATTERY on the
display, theinstalledbatteriesmaybedead.
programming, press
until OFF is
SWITCH
displayed, put the thermostat back on the
SYSTEM
SWITCH
wall, press
to select the operating
RUN
mode you want, then press
to start
PRGM
program operation. If the program is lost,
reprogramthethermostat.SeePROGRAM-
MING YOUR THERMOSTAT.
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31
If you need further information on programming or operation, write to:
White-Rodgers Division, Emerson Electric Co.
9797 Reavis Road
St. Louis, MO 63123-5398
Attn: Technical Service Department
Part No. 37-5099B
Replaces 37-5099A
9532
R
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