White Rodgers 1F97-51 User manual

OPERATION GUIDE
7-Day Programmable Electronic
Digital Thermostat
1F97-51
WHITE-RODGERS
Operator: Save this booklet for future use!

2
About Your New Thermostat . . .
Your new White-Rodgers Digital Thermostat uses the technology of a solid-state microcomputer
to provide precise time/temperature control. This thermostat offers you the flexibility to design
heating and cooling programs that fit your needs.
Pleasereadthismanualthoroughlybeforeoperatingorprogrammingyourthermostat.Ifyouhave
questions, write to us at the address shown on the back cover of this manual.

3
Operator: Save this
booklet for future use!
ENTERING YOUR PROGRAM
Set Current Time and Day
SelectHeatingandCoolingTemperatures
Program Heating/Cooling Times and
Heating Temperatures
Program Cooling Temperatures
Using the HOLD/COPY Button
CHECK YOUR PROGRAMMING
QUESTIONS AND ANSWERS................ 31
YOUR NEW THERMOSTAT’S
FEATURES ........................................... 4
OPERATING YOUR THERMOSTAT ........ 5
PARTS OF THE THERMOSTAT
The Back Of the Thermostat Body
The Display
The Thermostat Buttons
OPERATING FEATURES
PROGRAMMING YOUR
THERMOSTAT ................................... 16
PLANNING FOR YOUR NEEDS
In This Guide . . .

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• Seven independent day programming
• Simultaneousheatandcoolprogramstorage
• Fourseparatetime/temperaturesettingsper
24-hour period
• Computed Energy Management Recovery
(EMR)
• Armchair programming capability
• Backlit LCD displays continuous set point,
time, and room temperature
• 1.5 volt “AA” Energizer®alkaline battery
backup
• Preprogrammed temperature control
YOUR NEW THERMOSTAT’S FEATURES
• Adjustable cycle times
• Compressor short cycle protection
• Programmable blower control
• Blower delay in the cooling cycle
• Audio and visual prompting during operation
• Two hour temperature override
• Manual program override (HOLD tem-
perature)
•°F/°C convertibility
• Temperature range 40°to 99°F

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OPERATINGYOURTHERMOSTAT
Before you begin programming your thermo-
stat, you should be familiar with its features
and with the display and the location and
operation of the thermostat buttons. The in-
formation in this section will help you become
familiar with your new thermostat so that you
can easily program it.
Your thermostat consists of two parts: the ther-
mostat body and the subbase.
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.
Thesubbaseisattachedtothewall,butyoucan
remove the thermostat body for easy program-
ming. To remove the thermostat body from the
subbase, grasp the thermostat body and gently
pull it straight out from the subbase. To attach
the thermostat body, line up the two terminal
pinsonthelowersectionofthethermostatback
with the matching connector on the subbase.
Insert these, then gently pivot the thermostat
bodyuptoconnectthesixpinconnectorsonthe
upper portion of the thermostat back. Gently
push until the snap connectors engage. DO
NOTFORCEORPRYTHETHERMOSTAT,as
this may damage the unit.
CAUTION
!

6
PARTS OF THE THERMOSTAT
The Back of The Thermostat Body
Turnthe thermostat body over.On the back are
the 3 “AA” Energizer®alkaline batteries.
The “AA” Energizer®alkaline batteries provide
powertothethermostatwhenthe24VACpower
is interrupted (for example, when you remove
the thermostat from the wall for programming).
Freshbatterieswillmaintainthestoredprogram
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-
grammedtemperatures(64°Fheatingand82°F
cooling) when power is restored. You must
reprogram the thermostat if this happens.
If the word BATTERY is flashing in the display
BACK OF THERMOSTAT BODY
2-pin connector
6-pin connector Batteries
W14 S3
window, the batteries are low and should be
replaced with fresh “AA” Energizer®alkaline
batteries.

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Use
SYSTEM
SWITCH
to turn thermostat OFF be-
fore removing thermostat from the wall
to replace the batteries.
Other than and , the buttons are
locatedbehindthethermostatdoor.Toopenthe
door,useyourfingernailintheindentationatthe
top of the door to pull it out from the top, then
swing it down on its hinges.
On the following pages there are brief descrip-
tions of the display and the thermostat buttons.
CAUTION
!

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The Display
1
Continuouslydisplayssystemmode(HEAT,
OFF,COOL,HOLD).Duringprogramming,
the day of the week is displayed (MON,
TUE, WED, etc.).
2
Alternately displays room temperature (F
denotesdegreesFahrenheitandCdenotes
degrees Celsius) and time of day (Ade-
notes AM time and Pdenotes PM time).
3
Displays the setpoint temperature.
4
InVIEWTEMPmode,A,B,C,andDarethe
1st, 2nd, 3rd, and 4th heating or cooling
temperatures available for programming.
5
The word BATTERY flashes on the display
when the “AA” alkaline batteries are weak
and should be replaced. The word BAT-
TERYisdisplayedcontinuously(non-flash-
ing) when thermostat is running on battery
power only.
6
FAN ON is displayed when the blower is
operating continuously. FAN AUTO is dis-
playedduringautomaticfanoperation(when
theblowercycleswiththeheatingorcooling
system).

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ABFAN AUTO FAN ON
FAN AUTO
BATTERY
SYSTEM
SWITCH
FAN
SWITCH
HEAT-OFF-COOL
TIME
FWD
TIME
BACK
SET
CLOCK
ADV
DAY
VIEW
PRGM
VIEW
TEMP
HOLD
COPY
RUN
PRGM
ON-AUTO
WHITE-RODGERS DIGITAL COMFORT SET II
1 32
44
3
6 6 2 5

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The Thermostat Buttons
7
Sets the system mode (HEATing, OFF, or
COOLing).
8
Selects fan operation (see #6, above). This
buttonisalsousedtoprogramthefantorun
continuously during a program period.
9
Runs display forward or backward through
time, day, or anticipation settings during
programming.
10
Used with TIME
FWD and TIME BACK to set current time
and day of the week.
11
Used during programming to set the day of
theweektobeprogrammed.Alsousedwith
SET
CLOCK to enter anticipation setting mode.
12
Used to initiate or review thermostat pro-
gramming.
13
Used to select heating and cooling tem-
peratures to be programmed.
14
Used to manually override programming to
holdataselectedtemperature(whenHOLD
is displayed). Also used to copy one day’s
programming into another (when COPY is
displayed).
15
Used to start program operation after pro-
gramming. Also used to return thermostat to
programoperationafterbeinginHOLDmode.
16
(Red arrow) Raises temperature setting
(99°F or 37°C maximum).

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FAN AUTO
SYSTEM
SWITCH
FAN
SWITCH
HEAT-OFF-COOL
TIME
FWD
TIME
BACK
SET
CLOCK
ADV
DAY
VIEW
PRGM
VIEW
TEMP
HOLD
COPY
RUN
PRGM
ON-AUTO
WHITE-RODGERS DIGITAL COMFORT SET II
17
910 11 12 13 14 15
8
7
16 18
17
(Blue arrow) Lowers temperature setting
(40°F or 4°C minimum).
18
Theredindicatorlightglowswheneverheat-
ing, cooling, or fan are in operation.

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OPERATING FEATURES
Now that you are familiar with the thermostat
displayandbuttons,readthefollowinginforma-
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
nextprogramperiod,beginningat6:00AM,
you have programmed a temperature of
70°F. The thermostat will automatically ac-
tivatetheheatingsystemat5:00AM,sothat
the programmed 70°F temperature is
reached by about 6:00 AM.
The thermostat is configured at the factory
sothatthisfeatureisdisabled.Ifyouwishto
have this feature, refer to the installation
instructions for this thermostat, or contact
your local heating/cooling contractor.
•TWO HOUR TEMPERATURE OVERRIDE
— Press or until the display
shows the temperature you want. The ther-
mostat will override current programming
and keep the room temperature at the se-
lected temperature for two hours. After two
hours, the thermostat will automatically re-
vert to the program.

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CAUTION
!
•HOLD TEMPERATURE — The thermostat
can hold any temperature within its range
for an indefinite period, without reverting to
the program. Press HOLD
COPY . HOLD will be dis-
played. Then choose the desired hold tem-
perature by pressing or . The
thermostat will hold the room temperature
attheselectedsettinguntilyoupress RUN
PRGM to
start program operation again. This feature
is ideal for energy conservation when the
building is unoccupied for an extended pe-
riod of time.
•°F/°C CONVERTIBILITY —Press TIME
FWD and
TIME
BACK at the same time until the temperature
display is in °C(Celsius). To display °F,
repeat the process.
•ADJUSTABLE HEATING AND COOLING
CYCLE TIMES (ANTICIPATION) — If the
heating/coolingsystemisturningonandoff
too often (short cycles) or not often enough
(long cycles), you may want to adjust the
anticipation setting.
Acoolinganticipationsettingoflessthan
10maycausedecreasedcompressorlife.
To adjust heat anticipation, press SET
CLOCK and
ADV
DAY atthesametime.Thedisplaywillshow
HEAT5(thisisthefactorypreprogrammed
heating anticipation setting). You may se-
lect any anticipation setting from 4 to 40
(note that for hydronic systems, a mini-
mumanticipationsettingof15isrecom-
mended).

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Whenever adjusting anticipation, increase
or decrease the displayed number by only
oneortwodigits,thenletthesystemrunfor
awhiletoseeiftheadjustmentissufficient.
Iftheheatcyclesaretooshort,press TIME
FWD to
increase the cycle time. If the heat cycles
are too long, press TIME
BACK to decrease the
cycle time. To set cooling anticipation,
press SET
CLOCK and ADV DAY atthesametime again.
The display will show COOL 14 (factory
preprogrammed cooling anticipation). Use
the TIME
FWD and TIME BACK buttonstoadjustanticipa-
tion. Press RUN
PRGM to return to your program.
•LOW BATTERY INDICATOR — The three
“AA”alkalinebatterieswillmaintainthermo-
stat programming for approximately one
year if power to the thermostat fails. The
word BATTERY will flash on the display if
the“AA”alkalinebatteriesarelowandshould
be replaced. The thermostat will also make
a beeping sound every five minutes when
batteries need replacing. To override the
beeping, press any button on the keypad.
Thebeepingwillstopfor15hours,thenstart
again. You may again stop the beeping by
pressing any button on the keypad. After
turningthebeepoffthreetimes,thethermo-
stat will quit beeping. However, you should
always change the batteries as soon as
possible to ensure that programming will
not be lost in the event of a power outage.
You should also change the batteries at
least once a year.

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The word BATTERY will be displayed con-
tinuously(non-flashing)when24VACpower
isnotbeingsuppliedtothethermostatandthe
thermostatisoperatingonbatterypoweronly.
•AUDIO PROMPTING — Each time you
press a button, the thermostat will beep.
•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).
•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:
a) Return of power after a power outage.
b) Pressing
SYSTEM
SWITCH
to change operating
modes.
c) Pressing ,creatingacallforCOOL
too soon after a previous call.
PROGRAMMING

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Nowyouare ready to program your thermostat.
Thissectionwillhelpyouplanyourthermostat’s
program to meet your needs.
For maximum comfort and efficiency, keep the
followingguidelinesinmindwhenplanningyour
program.
• When heating (cooling) your building, pro-
gramthetemperaturestobecooler(warmer)
when the building is vacant or during peri-
ods of low activity.
• During early morning hours, the need for
cooling is usually minimal.
PLANNING FOR YOUR NEEDS
First,answerthefollowingquestionstohelpyou
decidewhatyourneedsare.Ifyouareusingthe
PROGRAMMING
PROGRAMMINGYOURTHERMOSTAT
thermostatforacommercialapplication(astore,
officebuilding,etc.),answerquestions1through
4. If you are using the thermostat in your home,
answer questions 5 through 8.
FOR COMMERCIAL APPLICATIONS:
1a. Whattimedoesthefirstpersonarriveatthe
building in the morning?
b. Whattemperature should the building be at
thistime?(heating?cooling?) Thesewillbe
your MOR (morning) temperature settings.
2a. What time do the building occupants reach
amaximumactivitylevel(usinglights,equip-
ment, meeting rooms, etc.)?
b. Whattemperature should the building be at
thistime?Thesewill beyour DAY tempera-
ture settings.

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3a. What time do the building occupants reach
a minimum activity level (limited personnel
in building)?
b. Whattemperature should the building be at
thistime?ThesewillbeyourEVE(evening)
temperature settings.
4a. Whattimedoesthebuildingbecomevacant?
b. Whattemperature should the building be at
this time? These will be your NHT (night)
temperature settings.
IN YOUR HOME:
5a. Whattimedoesthefirstpersongetupinthe
morning?
b. What temperature should the house be at
this time? These will be your MOR (morn-
ing) temperature settings.
6a. What time does the last person leave the
house in the morning?
b. What temperature should the house be at
thistime?Thesewill beyour DAY tempera-
ture settings.
7a. Whattimedoesthefirstpersonarrivehome
in the evening?
b. What temperature should the house be at
thistime?ThesewillbeyourEVE(evening)
temperature settings.
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.

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However, you may use the same heating
and cooling temperatures for consecutive
timeperiods.Alsokeepinmindthat,forany
given day, you can only program one set of
times for both heating and cooling (for ex-
ample, if you select 5:00 AM to begin heat-
ing period 1 on Monday, then your cooling
period 1 for Monday will also begin at 5:00
AM). However, you may choose different
time periods for each day separately (for
example, heating/cooling period 1 on Mon-
day may begin at 5:00 AM, but heating/
cooling period 1 on Saturday may begin at
Heating Program for
ALL days of the Week: Cooling Program for
ALL Days of the Week:
PERIOD TIME TEMP PERIOD TIME TEMP
1
2
3
4
5:00 AM
9:00 AM
4:00 PM
10:00 PM
70
70
70
64
1
2
3
4
5:00 AM
9:00 AM
4:00 PM
10:00 PM
78
82
78
78
FACTORY PREPROGRAMMING CHART
Now look at the factory preprogrammed times
andtemperaturesshownatright.Ifthisprogram
will suit your needs, simply press RUN
PRGM to begin
running the factory preset program.
Ifyouwanttochangethepreprogrammedtimes
and temperatures, follow these steps.
1. Determine the heating and cooling tempera-
tures you want to use. You may select up to
fourheatingtemperatures(HEATA,HEAT B,
HEATC,andHEATD),anduptofourcooling
temperatures (COOL A, COOL B, COOL C,
andCOOL D).Usethetable on thefollowing
page to write down the temperatures you
have selected.
2. Determine the time periods during which
youwillprogramthetemperaturesyouhave
just selected. You must program four peri-
ods for each day (periods 1, 2, 3, and 4).

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Temperature
Designation
Factory
Preprogrammed
Temperature
Your
Selected
Temperatures*
HEAT A
HEAT B
HEAT C
HEAT D
70
70
70
64
COOL A
COOL B
COOL C
COOL D
78
82
78
78
* You may only program heating temperatures you have selected
into the heating program and cooling temperatures into the
cooling program (for example, you cannot program the COOL A
temperature into your heating program). You may program the
temperatures you choose in any order, and you may use the
same temperature in consecutive program periods (for example,
you may program period 1 with temperature B and periods 2, 3,
and 4 with temperature A). You do not have to use all possible
temperature choices (for example, you may want to select
temperatures for HEAT A and HEAT B only – in this case, the
HEAT C and HEAT D temperatures would stay the same as
previously programmed).
9:00 AM). Use the table on the following
pagetoplanyourprogramtimeperiods,and
the temperatures you want during each
period. You may also want to look at the
sample program table to get an idea of how
the thermostat can be programmed.

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Period 1 Period 2 Period 3 Period 4
Time Heat Temp. Cool Temp. Time Heat Temp. Cool Temp. Time Heat Temp. Cool Temp. Time Heat Temp. Cool Temp.
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
Heating/Cooling Schedule Plan
THIS THERMOSTAT ALLOWS ONE SET OF TIMES FOR BOTH HEATING AND COOLING