White Rodgers 1F92-71 User manual

OPERATION GUIDE
Multi-stage/Heat Pump Electronic
Digital Thermostat
1F92-71
WHITE-RODGERS
Operator: Save this booklet for future use!

2
Please read this manual thoroughly before operating or programming your thermostat. If you
have 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/Heat Pump Thermostat uses the technology of
a solid-state microcomputer to provide precise time/temperature control. The COMFORT SET
IIThermostatoffersyoutheflexibilitytodesignheatingandcoolingprogramsthatfityourneeds.

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In This Guide . . .
Operator: Save this
booklet for future use!
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 ................................... 18
PLANNING FOR YOUR NEEDS
ENTERING YOUR PROGRAM
Set Current Time and Day
Enter Heating Program
Enter Cooling Program
CHECK YOUR PROGRAMMING
QUESTIONS AND ANSWERS ............... 29

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YOUR NEW THERMOSTAT’S FEATURES
• Computed Energy Management Recov-
ery (EMR)
• Automatic changeover (operator select-
able)
• Five-day/two-dayprogrammingcapability
• Up to 3 stages of heat and up to 2 stages
of cool
• Two hour temperature override
• Manualprogramoverride(HOLDtempera-
ture)
• “Advance Program” button
• Simultaneousheatandcoolprogramstor-
age
• Four separate time and temperature set-
tings per 24-hour period
• Armchair programming capability
• Backlit LCD displays continuous setpoint,
time, and room temperature
• Adjustable cycle times
• 9 volt Energizer®alkaline battery backup
• Compressor long term cycle protection
• Compressor short cycle protection
• Blower delay in the cooling cycle
• Preprogrammed temperature control
• Audio and visual prompting during opera-
tion
• Programmable blower control
• Temperature range 40°to 99°F
•°F/°C convertibility
• Compatible with optional Remote Sensor
• Electric Heat (installer-selectable)

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OPERATING YOUR THERMOSTAT
Beforeyoubeginprogrammingyournewther-
mostat,youshouldbefamiliarwithitsfeatures
and with the display and the location and
operationofthe thermostatbuttons. Theinfor-
mation in this section will help you become
familiar with your thermostat so that you can
easily program it.
Your thermostat consists of two parts: the
thermostat body and the subbase.
Use
SYSTEM
SWITCH
to turn thermostat OFF
before removing or attaching the ther-
mostat body. Equipment damage and/
or personal injury could occur.
The subbase is attached to the wall, but you
can remove the thermostat body for easy pro-
gramming. To remove the thermostat body
from the subbase, grasp the thermostat body
and gently pull it out from the bottom of the
subbase, then pivot up. To attach the thermo-
stat body, line up the four terminal pins on the
upper section of the thermostat back with the
matching connector on the subbase. Insert
these, then gently pivot the thermostat body
downtoconnecttheninepinconnectorsonthe
lower 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.
CAUTION
!

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PARTS OF THE THERMOSTAT
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.
Use
SYSTEM
SWITCH
to turn thermostat OFF
before removing thermostat from the
wall to replace the battery.
CAUTION
!
BACK OF THERMOSTAT BODY
Option switches 9-pin connector
4-pin connector Battery

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1. The 9 volt Energizer®alkaline battery pro-
vides power to the thermostat when the
24 VACpowerisinterrupted(forexample,
whenyouremove thethermostat fromthe
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
thermostat will automatically maintain a
factory preprogrammed heating tempera-
ture of 64°F and a cooling temperature of
82°F after power is restored. You must
reprogram the thermostat if this happens.
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
lightandaudioprompting,whichworkonly
on 24 VAC power.
2. You may adjust option switch #4 for auto-
matic changeover from heating to cooling
(see OPERATING FEATURES).

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3Displays the setpoint temperature.
45 DAY indicates that the displayed pro-
gram is the weekday program. 2 DAY
indicatesthatthedisplayedprogramisthe
weekend program.
5ThewordBATflashesonthedisplaywhen
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
(when the blower cycles with the heating
or cooling system).
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
1Continuously displays system mode
(HEAT,EMER, OFF,COOL,AUTO,
HOLD).Duringprogramming,theprogram
period is displayed (MOR, DAY, EVE,
NHT).
2Alternately displays room temperature (F
denotes degrees Fahrenheit and Cde-
notesdegreesCelsius)andtimeofday (A
denotesAMtimeandPdenotesPMtime).

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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
EMER. PUMP
MALF. AUX.

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The Thermostat Buttons and Lights
7Sets the system mode (HEATing,
EMERgency backup system, OFF,
COOLing,orAUTOmaticchangeover[user
selectable feature]).
8Selects fan operation (see #6, above). This
buttonisalsousedtoprogramthefantorun
continuously during a program period.
9
Runsdisplayforwardorbackwardthrough
time, day, or anticipation settings during
programming.
10 Usedwith
TIME
FWD
and TIME
BACK tosetcurrenttime
and day of the week.
11 Usedduringprogrammingtosetthedayof
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 Used to manually override programming
to hold at a selected temperature (when
HOLD is displayed).
15 Used to advance thermostat program to
the next program period (for example,
from the MOR program to the DAY pro-
gram).
16 (Blue arrow) Lowers temperature setting
(40°F or 4°C minimum).
17 (Red arrow) Raises temperature setting
(99°F or 37°C maximum)

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heat pump manufacturer’s operating
manual). A continuous (non-flashing)
PUMP light indicates that the heat pump
compressor is functioning — a flashing
PUMP light indicates that the compressor
is locked out. AUX light indicates that the
auxiliary system is operating.
18 EMER light indicates that the system is in
theemergencymode(theheatpumpcom-
pressor is off and the auxiliary system is
maintainingsetpoint temperature— there
isa5to10minutestartupdelayonthefirst
emergency cycle). MALF light indicates a
heat pump system malfunction (refer to
SYSTEM
SWITCH
FAN
SWITCH
TIME
FWD
TIME
BACK
SET
CLOCK
SET
DAY
VIEW
PRGM
RUN
PRGM
HOLD
TEMP
ADV
PRGM
II
W H I T E - R O D G E R S
10 11 12 13 14 15
16 17 18
9
7
8
HEAT/OFF/COOL/AUTO
DIGITAL MULTI-STAGE COMFORT-SET
ON /AUTO
5 DAY FAN
EMER. PUMP
MALF. AUX.

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OPERATING FEATURES
Now that you are familiar with the thermostat
display and buttons, read the following infor-
mationto learnabout themany featuresofthe
thermostat.
•COMPUTED ENERGY MANAGEMENT
RECOVERY (EMR) - The thermostat’s
microcomputer automatically calculates
thetimeitwilltaketochangethetempera-
ture to the next program setting. Then the
thermostatwillactivatetheheatingorcool-
ing system to change the temperature so
thatthedesired temperatureis reachedat
the beginning of the next program period.
Asanexampleofthisfeature,assumethat
you have programmed your thermostat to
provide an overnight heating temperature
of 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.
•AUTOMATICCHANGEOVER—Youcan
set the thermostat to automatically switch
the system from heating to cooling as
needed.First,youmustmoveoptionswitch
#4 (located on the back of the thermostat
body) to the ON position, if it has not
already been done. To do this, turn off
24 VAC power to the thermostat. Then,
removethethermostatbodyfromthewall.
Check the position of switch #4 (the last
switch on the right). If it is ON (up), simply
put the thermostat back on the wall and
restore24VACpower.IftheswitchisOFF

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Automatic Changeover (ON)
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
settingto beless that1°F. Forexample, ifthe
highest heat setting is 76°F, the lowest cool
setting cannot be below 77°F (see diagram
below).
(down), use a pencil or small screwdriver
tomovetheswitchtotheON position (see
figureatright).Leavethebatteryoutofthe
thermostat for at least two minutes, to
allow the thermostat to reset itself. DO
NOT MOVE ANY OTHER OPTION
SWITCH, as it may affect thermostat op-
eration. Replace the battery, reprogram
the thermostat if necessary, put the ther-
mostat back on the wall, and restore
24 VAC power. To set the thermostat for
automaticchangeoverafterprogramming,
press
SYSTEM
SWITCH
to set the thermostat to
AUTO (the setpoint display is blank in the
AUTO mode). The system will now auto-
maticallyswitchbetweenheatingandcool-
ing depending on the actual room tem-
perature.
ON
1234
79
78
77
76
75
74
COOLING TEMPERATURES
HEATING TEMPERATURES
DEAD BAND 1°F

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you press
RUN
PRGM
to start program operation
again. This feature is ideal for energy
conservationwhenthebuildingisunoccu-
pied for an extended period of time.
•°F/°C CONVERTIBILITY — Press
TIME
FWD
and TIME
BACK at the same time until the tem-
perature display is in °C(Celsius). To
display °F, repeat the process.
•ADJUSTABLE HEATING AND COOL-
ING CYCLE TIMES (ANTICIPATION) —
If the heating/cooling system is turning on
andofftoooften(shortcycles)ornotoften
enough (long cycles), you may want to
adjust the anticipation setting.
•TWO HOUR TEMPERATURE OVER-
RIDE — Press or until the
display shows the temperature you want.
The thermostat will override current pro-
grammingandkeeptheroomtemperature
atthe selectedtemperaturefor twohours.
After two hours, the thermostat will auto-
matically revert to the program.
•HOLD TEMPERATURE — The thermo-
stat can hold any temperature within its
range for an indefinite period, without re-
verting to the program. Press
HOLD
TEMP
. HOLD
willbedisplayed.Thenchoosethedesired
hold temperature by pressing or
. The thermostat will hold the room
temperature at the selected setting until

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A cooling anticipation setting of less
than 10 may cause decreased com-
pressor life.
To adjust HEAT anticipation, press SET
CLOCK
and SET
DAY atthesametime.Thedisplaywill
showHEAT18.Youmayselectanyantici-
pation setting from 4 to 40 (note that for
add-onheatpumpsystems,aminimum
anticipation of 10 is recommended).
Wheneveradjustinganticipation,increase
ordecreasethe displayednumberbyonly
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,
press
TIME
FWD
toincreasethecycletime.Ifthe
heat cycles are too long, press
TIME
BACK
to
decrease the cycle time. To set COOL
anticipation, press SET
CLOCK and SET
DAY at the
same time again. The display will show
COOL 14 (factory preprogrammed cool-
ing anticipation). Use
TIME
FWD
and TIME
BACK to
adjust anticipation. To set AUXILIARY
heat anticipation (not applicable to multi-
stage use), press
SET
CLOCK
and
SET
DAY
at the
same time again. The display will show
AUX 8 (factory preprogrammed auxiliary
anticipation). Use
TIME
FWD
and
TIME
BACK
to adjust
anticipation. Press
RUN
PRGM
to return to your
program.
CAUTION
!

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•LOWBATTERYINDICATOR—Theword
BAT will flash on the display if the 9 volt
alkaline battery is low and should be re-
placed.
•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 (this
feature works only when the thermostat is
attached to the wall and 24 VAC power is
present to the thermostat).
•COMPRESSOR SHORT CYCLE PRO-
TECTION — To protect your compressor
from potential damage due to rapid cy-
cling,thisthermostathasabuilt-indelayof
5 minutes between cooling cycles. The
blowerwilloperateduringatimedelay,but
the air circulated will not be cooled. The
followingmaycauseatimedelayinCOOL
or HEAT:
a) Return of power after a momentary
power outage.
b) Pressing
SYSTEM
SWITCH
to change operating
modes.
c) Pressing or to create a call
for COOL or HEAT too soon after a
previous call.
During lockout in the HEAT mode, the
greencompressor (PUMP)LEDwill flash.
During lockout in the COOL mode, the
blower will operate, but compressor op-
eration will be delayed.
Auxiliaryheatisfunctionalduringthecom-
pressorlockoutandcanbeusedasneeded
to maintain room temperature.

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•COMPRESSOR LONG TERM CYCLE
PROTECTION—Ifyoursystembeginsto
operatetoosoonafter anextendedpower
outage,thecompressor maybe damaged
due to crankcase oil temperature change.
Thisthermostathasabuilt-intimedelayof
onehourlessthanthepowerloss(upto12
hours). When power is restored to the
system,heatersinthesystemwillbeginto
heat the crankcase oils. The thermostat’s
time delay will lock out the compressor to
prevent its operation until the compressor
oil is sufficiently warmed. During the lock-
out time period, the auxiliary heating sys-
tem will operate to maintain setpoint tem-
perature.
For example, if a power outage of three
hoursoccurs,thecompressorwillbelocked
out for two hours.
•SYSTEM INDICATOR LIGHTS — The
four lights on the upper right part of the
thermostatindicatesystemoperation(see
PARTS OF THE THERMOSTAT for spe-
cific descriptions of what each light indi-
cates).
•PROGRAMMABLE BLOWER CON-
TROL—Youmayprogramthefanblower
to run continuously during any given pro-
gram period, regardless of the cycling of
theheatingor coolingsystem.Duringpro-
gramming,afterenteringthetimeandtem-
peratureforthetimeperiod,press
FAN
SWITCH
untilFAN is displayed. Tooverride con-
stant fan, press until FAN is displayed.

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PROGRAMMING YOUR THERMOSTAT
Now you are ready to program your thermo-
stat. This section will help you plan and pro-
gram your thermostat to meet your needs.
Formaximumcomfortandefficiency,keepthe
following guidelines in mind when planning
your program.
• Whenheating(cooling)yourbuilding,pro-
gram the temperatures to be cooler
(warmer) when the building is vacant or
during periods of low activity.
• During early morning hours, the need for
cooling is usually minimal.
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
throughFriday,andthetwo-dayprogramisset
to run Saturday and Sunday. However, you
may choose any five consecutive days to be
your weekday program days (such as Sunday
through Thursday; in this case, your weekend
program would run on Friday and Saturday).
First, you should answer the following ques-
tions to help you decide what your needs are.
If you are using the thermostat for a commer-
cial application (a store, office building, etc.),

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answerquestions1 through4.Ifyouare using
the thermostat in your home, answer ques-
tions5through8.Keepinmindthatyoushould
planforbothweekdayandweekendprograms.
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.
2a. Whattimedothebuildingoccupantsreach
a maximum activity level (using lights,
equipment, meeting rooms, etc.)?
b. What temperature should the building be
at this time? These will be your DAY tem-
perature settings.
3a. Whattimedothebuildingoccupantsreach
aminimumactivitylevel(limitedpersonnel
in building)? These will be your EVE
(evening) temperature settings.
b. What temperature should the building be
at this time?
4a. What time does the building become
vacant?
b. What temperature should the building be
atthistime?ThesewillbeyourNHT(night)
temperature 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.

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6a. What time does the last person leave the
house in the morning?
b. What temperature should the house be at
this time? These will be your DAY tem-
perature settings.
7a. What time does the first person arrive
home 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.
Now look at the factory preprogrammed times
and temperatures shown below. If this pro-
gram will suit your needs, simply press
RUN
PRGM
to
begin running the factory preset program.
If you want to change the preprogrammed
times and temperatures, do the following.
Heating Program for ALL days of the Week: Cooling Program for ALL Days of the Week:
PERIOD TIME TEMP PERIOD TIME TEMP
MOR
DAY
EVE
NHT
5:00 AM
9:00 AM
4:00 PM
10:00 PM
70
70
70
64
MOR
DAY
EVE
NHT
5:00 AM
9:00 AM
4:00 PM
10:00 PM
78
82
78
78
FACTORY PREPROGRAMMING