White Rodgers 1F91W-71 User manual

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

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Pleasereadthismanualthoroughlybeforeoperatingorprogrammingyourthermostat. Ifyouhave
questions, you may write to our Technical Service Department at the address shown on the back
cover of this booklet.
About Your New Thermostat . . .
Your new Digital COMFORT SET II Multi-stage Thermostat uses the technology of a solid-state
microcomputer to provide precise time/temperature control. The COMFORT SET II Thermostat
offers you the flexibility to design heating and cooling programs that fit your needs.

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In This Guide . . .
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 ................................... 17
PLANNING FOR YOUR NEEDS
ENTERING YOUR PROGRAM
Set Current Time and Day
Enter Heating Program
Enter Cooling Program
CHECK YOUR PROGRAMMING
QUESTIONS AND ANSWERS................ 28
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booklet for future use!

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• Computed Energy Management Recovery
(EMR)
• 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
• Manual program override (HOLD tempera-
ture)
• "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)
YOUR NEW THERMOSTAT’S FEATURES

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Before you begin programming your new ther-
mostat, you should be familiar with its features
andwiththedisplayandthelocationandopera-
tion of the thermostat buttons. The information
inthissectionwillhelpyoubecomefamiliarwith
yourthermostat sothat youcan easilyprogram
it.
Your thermostat consists of two parts: the
thermostat 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.
OPERATINGYOURTHERMOSTAT
CAUTION
!
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 out from the bottom of the subbase, then
pivotup. Toattach the thermostatbody, line up
thefourterminalpinsontheuppersectionofthe
thermostatbackwiththematchingconnectoron
the subbase. Insert these, then gently pivot the
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.

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PARTS OF THE THERMOSTAT
The Back of the Thermostat Body
Turnthethermostatbodyover. Onthebackare
the 9 volt Energizer®alkaline battery and the
option switches.
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
powerisrestored. Youmust reprogramthe
thermostat if this happens.
If the word BAT is flashing in the display
window, the battery is low and should be
replacedwithafresh9voltEnergizer®alka-
BACK OF THERMOSTAT BODY
Option switches 9-pin connector
4-pin connector Battery

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line battery. The battery will provide power
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.
Before removing thermostat from the
wall to replace the battery, remove
24 VACpowerfromthethermostatatthe
breaker/fuse box.
2. You may adjust option switch #4 for auto-
matic changeover from heating to cooling
(see OPERATING FEATURES).
CAUTION
!

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Other than and , the buttons are
locatedbehindthethermostatdoor. Toopenthe
door,useyourfingernailintheindentationatthe
top center of the door. Pull the door out, then
swing the door down on its hinges.
Following are brief descriptions of the display
and the thermostat buttons.
The Display
Continuouslydisplayssystemmode(HEAT,
OFF,COOL,AUTO,HOLD). During pro-
gramming, the program period is displayed
(MOR, DAY, EVE, NHT).
Alternately displays room temperature (F
denotesdegreesFahrenheitandCdenotes
degrees Celsius) and time of day (Ade-
notes AM time and Pdenotes PM time).
Displays the setpoint temperature.
5DAY indicatesthatthedisplayedprogram
is the weekday program. 2 DAY indicates
that the displayed program is the weekend
program.
The word BAT flashes on the display when
the9voltalkalinebatteryisweakandshould
be replaced.
FAN is displayed when the blower is
operating continuously, regardless of heat-
ing or cooling system cycling. FAN is
displayed during automatic fan operation
(when the blower cycles with the heating or
cooling system).
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2
3
4
5
6

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1 2 3
466
2 DAY 5 DAY
2
3
54
FAN FANBAT
5 DAY FAN
VIEW
PRGM
ADV
PRGM
FAN
ON - AUTO
HOLD
TEMP
RUN
PRGM
SET
CLOCK
SET
DAY
SYSTEM
HEAT - OFF - COOL - AUTO
TIME
FWD
TIME
BACK

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The Thermostat Buttons
Sets the system mode (HEATing, OFF,
COOLing,orAUTOmaticchangeover[user
selectable feature]).
Selectsfanoperation(see#6,above). This
buttonisalsousedtoprogramthefantorun
continuously during a program period.
Runs display forward or backward through
time, day, or anticipation settings during
programming.
Used in conjunction with
TIME
FWD
and
TIME
BACK
to
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.
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).
Usedtoadvancethermostatprogramtothe
next program period (for example, from the
MOR program to the DAY program).
(Bluearrow)Lowerstemperatureset-
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.
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