White Rodgers 1F91-71 User manual

OPERATION GUIDE
Multi-stage Electronic Digital
Thermostat
1F91-71
WHITE-RODGERS
Operator: Save this booklet for future use!

2
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
• Audio and visual prompting during pro-
gramming
• Programmable blower control
• Two hour temperature override
• Manualprogramoverride(HOLDtempera-
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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Beforeyoubeginprogrammingyournewther-
mostat, you should be familiar with its fea-
turesandwiththedisplayandthelocationand
operation of the thermostat buttons. The in-
formation in this section will help you become
familiar with your thermostat so that you can
easily program it.
Yourthermostatconsistsoftwoparts:thether-
mostat body and the subbase.
Use
SYSTEM
SWITCH
to turn thermostat OFF be-
fore removing or attaching the thermo-
stat body. Equipment damage and/or
personal injury could occur.
OPERATINGYOURTHERMOSTAT
Thesubbaseisattachedtothewall,butyoucan
remove the thermostat body for easy program-
ming. To remove the thermostat body from the
subbase,graspthethermostatbodyandgently
pull it out from the bottom of the subbase, then
pivot up. To attach the thermostat body, line up
thefourterminalpinsontheuppersectionofthe
thermostat back with the matching connector
on the subbase. Insert these, then gently pivot
the thermostat body down to connect the nine
pin connectors on the lower portion of the ther-
mostat back. Gently push until the snap con-
nectors engage. DO NOT FORCE OR PRY
THE THERMOSTAT, as this may damage
the unit.
CAUTION
!

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If the word BAT is flashing in the display
window, the battery is low and should be
replaced with a fresh 9 volt Energizer®
alkaline battery. The battery will provide
power for all functions except the display
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
thermostatwillautomaticallymaintainafac-
tory preprogrammed heating temperature
of 64°F and a cooling temperature of 82°F
after power is restored. You must repro-
gram the thermostat if this happens.
BACK OF THERMOSTAT BODY
Option switches 9-pin connector
4-pin connector Battery

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light and audio prompting, which work only
on 24 VAC power. If the word BAT is dis-
playedcontinuously(non-flashing),thether-
mostat is not being supplied with 24 VAC
power and is being powered by the battery
alone.
Use
SYSTEM
SWITCH
to turn thermostat OFF be-
fore removing thermostat from the wall
to replace the battery.
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
located behind the thermostat door. To open
the 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.
Following are brief descriptions of the display
and the thermostat buttons.
The Display
1Continuouslydisplayssystemmode(HEAT,
OFF,COOL,AUTO,HOLD). During pro-
gramming,theprogramperiodisdisplayed
(MOR, DAY, EVE, NHT).
2Alternately displays room temperature (F
denotes degrees Fahrenheit and Cde-
notes degrees Celsius) and time of day (A
denotes AM time and Pdenotes PM time).
3
Displays the setpoint temperature.
4
5DAYindicatesthatthedisplayedprogram
is the weekday program. 2 DAY indicates
that the displayed program is the weekend
program.
5
ThewordBAT flasheson the displaywhen
the 9 volt alkaline battery is weak and
should be replaced.
6
FAN is displayed when the blower is
operatingcontinuously,regardlessofheat-
ing or cooling system cycling. FAN is
displayed during automatic fan operation
(whentheblowercycleswiththeheatingor
cooling system).

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SYSTEM
SWITCH
FAN
SWITCH
HEAT/OFF/COOL/AUTO
TIME
FWD
TIME
BACK
SET
CLOCK
SET
DAY
VIEW
PRGM
RUN
PRGM
HOLD
TEMP
ADV
PRGM
DIGITAL MULTI-STAGE COMFORT-SET II
W H I T E - R O D G E R S
1 2 3
466
2 DAY 5 DAY
2
3
54
FAN FANBAT
ON /AUTO
5 DAY FAN

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The Thermostat Buttons
7Sets the system mode (HEATing, OFF,
COOLing,orAUTOmaticchangeover[user
selectable feature]).
8Selectsfanoperation(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
the week. Also used with SET
CLOCK to enter
anticipation setting mode.
12
Used to initiate or review thermostat pro-
gramming.
13
Used to start program operation after pro-
gramming. Also used to return thermostat
to program operation after being in HOLD
mode.
14
Usedtomanuallyoverrideprogramming to
holdataselectedtemperature(whenHOLD
is displayed).
15
Usedtoadvancethermostatprogramtothe
nextprogramperiod (forexample,from the
MOR program to the DAY program).
16
(Blue arrow) Lowers temperature setting
(40°F or 4°C minimum).
17
(Red arrow) Raises temperature setting
(99°F or 37°C maximum)