White Rodgers 1F94-71 User manual

OPERATION GUIDE
7 Day Multi-stage/Heat Pump
Electronic Digital Thermostat
1F94-71
WHITE-RODGERS
Operator: Save this booklet for future use!
W H I T E - R O D G E R S
DIGITAL COMFORT SET II

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/Heat Pump 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.

3
Program Heating/Cooling Times
and Heating Temperatures
Program Cooling Temperatures
Using the HOLD/COPY Button
CHECK YOUR PROGRAMMING
QUESTIONS AND ANSWERS................ 33
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
Program Heating and Cooling
Temperatures
In This Guide . . .
Operator: Save this
booklet for future use!

4
• Computed Energy Management Recovery
(EMR)
• Automaticchangeover(operator-selectable)
• Separate setback programming for 7 inde-
pendent days
• Simultaneous heat and cool program stor-
age
• Fourseparatetime/temperaturesettingsper
24-hour period
• Armchair programming capability
• Up to 3 stages of heat and up to 2 stages of
cool
• Backlit LCD displays continuous set point,
time, and room temperature
• 9 volt Energizer®alkaline battery backup
• Preprogrammed temperature control
• Adjustable cycle times
• Compressor short cycle protection
• Compressor long term cycle protection
• Blower delay in the cooling cycle
• Audioandvisualpromptingduringoperation
• Two hour temperature override
• Manual program override (HOLD tempera-
ture)
•°F/°C convertibility
• Keypad lockout (operator-selectable)
• Temperature range 40°to 99°F
• Compatible with Remote Sensor (installer-
selectable)
YOUR NEW THERMOSTAT’S FEATURES

5
OPERATING YOUR THERMOSTAT
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 and
pivotup. To attach the thermostat body,line up
thefourterminalpinsontheuppersectionofthe
thermostatbackwiththematchingconnectoron
the subbase. Insert these, then gently pivot the
thermostat body down to connect the eight pin
connectors on the lower portion of the thermo-
statback. Gentlypushuntilthesnapconnectors
engage. DONOTFORCEORPRYTHETHER-
MOSTAT as this may damage the unit.
Before you begin programming your thermo-
stat,you should be familiar with its featuresand
with the display and the location and operation
of the thermostat buttons. The information 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
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.
CAUTION
!

6
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
24vAC 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-
matelyaweek. Ifpowerlossislong enough
fortheprogramtobelost,thethermostatwill
automatically return to the factory pro-
grammed temperatures (64°F heating and
82°F cooling) when power is restored. You
BACK OF THERMOSTAT BODY
Option switches 9-pin connector
4-pin connector Battery
W18
must reprogram the thermostat if this hap-
pens.
If the word BATTERY is flashing in the
displaywindow,thebatteryislowandshould
be replaced with a fresh 9 volt Energizer®

7
alkaline battery. The battery will provide
power for all functions except the display
light, which works only on 24vAC power.
Before removing thermostat from the
walltoreplacethebattery,remove24vAC
powerformthethermostatatthebreaker/
fuse box.
CAUTION
!
2. You may adjust the option switches for key-
padlockoutandautomaticchangeoverfrom
heattocool(seeOPERATINGFEATURES).
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.

8
When
VIEW
TEMP
ispressed,Aisdisplayedwhen
the setpoint temperature displayed (at the
far right) is the 1st programmed heating or
cooling temperature (depending on mode).
Bis displayed when the 2nd programmed
heatingorcoolingtemperature is beingdis-
played.
FAN ON is displayed when the blower is
operating continuously. FAN AUTO is dis-
playedduringautomaticfanoperation(when
theblowercycleswiththeheatingorcooling
system).
The word BATTERY flashes on the display
when the 9 volt alkaline battery power is
weak and should be replaced.
The Display
Continuouslydisplayssystemmode(HEAT,
EMER, OFF, COOL, AUTO, HOLD). Dur-
ing programming, the day of the week is
displayed (MO, TU, WE, etc.).
Alternately displays room temperature (F
denotesdegreesFahrenheitandCdenotes
degrees Celsius) and time of day (Ade-
notes AM time and Pdenotes PM time).
Displays the setpoint temperature.
1
2
3
4
5
6

9
SYSTEM
SWITCH
FAN
SWITCH
HEAT-EMER-OFF-COOL-AUTO
ON-AUTO
TIME
FWD
TIME
BACK
SET
CLOCK
ADV
DAY
VIEW
PRGM
VIEW
TEMP
HOLD
COPY
RUN
PRGM
SEVEN DAY DIGITAL COMFORT-SET II W H I T E - R O D G E R S
1 2 3
4 5 6
FAN AUTOA FAN ONB BATTERY
AFAN AUTO
2
3
4
54
EMER. PUMP
MALF. AUX.

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Used with
TIME
FWD
and
TIME
BACK
to select setpoint
temperatures.
Used to manually override programming to
holdataselectedtemperature(whenHOLD
is displayed). Also used to copy one day’s
programming to another day (when COPY
is displayed).
Used to start program operation after pro-
gramming.Alsousedtoreturnthermostatto
program operation after being in HOLD
mode.
(Red arrow) Raises temperature setting
(99°F or 37°C maximum).
(Blue arrow) Lowers temperature setting
(40°F or 4°C minimum).
EMER light indicates that the system is in
the emergency mode (the heat pump com-
pressor is off and the auxiliary heat system
The Thermostat Buttons
Sets the system mode (HEATing, OFF,
COOLing, or AUTOmatic changeover).
Selects fan operation (see #5, above).
Runs display forward or backward through
time, day, or anticipation settings during
programming.
Usedwith
TIME
FWD
and
TIME
BACK
toset current time
and day of the week.
Used during programming to set the day of
the week to be programmed.
Usedtoinitiateorreviewprogramming(pro-
gram viewing automatically begins with
Monday’sprogram;use
ADV
DAY
buttontoview
programming for following days).
7
8
9
10
11
12
15
17
16
14
13
18

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lightindicates that the heat pumpcompres-
sor is functioning — a flashing PUMP light
indicatesthatthecompressor is lockedout.
AUXlightindicatesthattheauxiliarysystem
is operating.
is maintaining the setpoint temperature —
there is a 5- to 10-minute startup delay on
the first emergency cycle). MALF light indi-
cates a heat pump system malfunction (re-
fer to heat pump manufacturer's operating
manual).Acontinuous(non-flashing)PUMP
SYSTEM
SWITCH
FAN
SWITCH
HEAT-EMER-OFF-COOL-AUTO
ON-AUTO
TIME
FWD
TIME
BACK
SET
CLOCK
ADV
DAY
VIEW
PRGM
VIEW
TEMP
HOLD
COPY
RUN
PRGM
SEVEN DAY DIGITAL COMFORT-SET II W H I T E - R O D G E R S
FAN AUTO
10 11 12 13 14 15
16 17
9
7
8
18
EMER. PUMP
MALF. AUX.

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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
microcomputerautomaticallycalculatesthe
timeitwilltaketochangethetemperatureto
thenextprogramsetting. Thenthethermo-
stat will activate the heating or cooling sys-
tem to change the temperature so that the
desired temperature is reached at the be-
ginning of the next program period. As an
example of this feature, assume that you
have programmed your thermostat to pro-
vide 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.
•AUTOMATIC CHANGEOVER — You can
set the thermostat to automatically switch
the system from heating to cooling as
needed. Firstyoumustmoveoptionswitch
#4 (located on the back of the thermostat
body)totheONposition,ifithasnotalready
been done. To do this, turn off 24v AC
power to the thermostat. Then remove the
thermostat body from the wall. Check the
position of switch #4 (the last switch on the
right). IfitisON(up),simplyputthethermo-
stat back on the wall and restore 24v AC
power. IftheswitchisOFF (down),remove

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Switch #1 set at installation (DO NOT CHANGE)
Switch #2 set at installation (DO NOT CHANGE)
Switch #3 (see TOTAL KEYPAD LOCKOUT)
Switch #4 ON
In the AUTO mode, the thermostat will not
allow the temperature separation between
the highest heat setting and the lowest cool
setting to be less than 1°F. For example, if
the highest heat setting is 75°F, the lowest
cool setting cannot be below 77°F (see
diagram below).
thebattery,thenuseapencilorsmallscrew-
drivertomove theswitchtotheON position
(seefigureatright). Leavethebatteryoutof
the thermostat for at least two minutes, to
allowthethermostattoresetitself. DONOT
MOVE OPTION SWITCHES #1 OR #2, as
this may affect thermostat operation. [Op-
tionswitch#3enables/disableskeypadlock-
out (see TOTAL KEYPAD LOCKOUT)].
Replacethebattery,reprogramthethermo-
stat, if necessary, put the thermostat back
on the wall, and restore 24v AC power. To
setthethermostatforautomaticchangeover
afterprogramming,press
SYSTEM
SWITCH
tosetthe
thermostat to AUTO (the setpoint tempera-
ture display is blank in the AUTO mode).
The system will now automatically switch
betweenheatingandcooling,dependingon
the actual room temperature.
ON
1234
79
78
77
76
75
74
73
COOLING TEMPERATURES
HEATING TEMPERATURES
DEAD BAND 1°F

14
•TWO HOUR TEMPERATURE OVER-
RIDE — Press or until the
display shows the temperature you want.
The thermostat will override current pro-
gramming and keep the room temperature
at the selected temperature for two hours.
After two hours, the thermostat will auto-
matically revert to the program.
•HOLD TEMPERATURE — Thethermostat
can hold any temperature within its range
for an indefinite period, without reverting to
the program. Press
HOLD
COPY
. HOLD will be
displayed. Then choose the desired hold
temperature by pressing or .
The thermostat will hold the room tempera-
ture at the selected setting until you press
RUN
PRGM
tostartprogramoperationagain.This
featureisidealforenergyconservationwhen
the building is unoccupied for an extended
period of time.
•°F/°CCONVERTIBILITY—Press
TIME
FWD
and
TIME
BACK
atthesametimeuntilthetemperature
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.
A cooling anticipation setting of less
than 10 may cause decreased compres-
sor life.
CAUTION
!

15
Toadjustheatanticipation,press
SET
CLOCK
and
ADV
DAY
atthesametime.Thedisplaywillshow
HEAT18(thisisthefactorypreprogrammed
heating anticipation setting). You may se-
lect any anticipation setting from 4 to 40
(note that for add-on heat pump sys-
tems, a minimum anticipation setting of
10is recommended).Wheneveradjusting
anticipation, increase or decrease the dis-
played number by only one or two digits,
then let the system run for a while to see if
theadjustmentissufficient.Iftheheatcycles
are too short, 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
atthesametimeagain.Thedisplaywill
show COOL 14 (factory preprogrammed
coolinganticipation).Usethe
TIME
FWD
and
TIME
BACK
buttons to adjust anticipation. To set auxil-
iaryheatanticipation,press
SET
CLOCK
and
ADV
DAY
at the same time again. The display will
show AUX 8 (factory preprogrammed cool-
ing anticipation). Use the
TIME
FWD
and
TIME
BACK
buttonstoadjustanticipation.Press
RUN
PRGM
to
return to your program.
•LOW BATTERY INDICATOR — The word
BATTERY will flash on the display if the 9
volt alkaline battery is low and should be
replaced.

16
•AUDIO PROMPTING — Each time you
pressabutton,thethermostatwillbeep(this
feature works only when the thermostat is
attached to the wall and 24vAC power is
present to the thermostat).
•BACKLIT DISPLAY — When you press
any button on the thermostat, the display is
litforapproximatelyeightseconds(thisfea-
ture works only when the thermostat is
attached to the wall and 24vAC power is
present to the thermostat).
•SYSTEMINDICATOR LIGHTS—Thefour
lights on the upper right part of the thermo-
statindicatesystem operation(seePARTS
OF 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 heat pump heating and 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 or , creating a call
for HEAT or COOL too soon after a
previous call.
•COMPRESSOR LONG TERM CYCLE
PROTECTION — If your system begins to
operate too soon after an extended power
outage, the compressor may be damaged
due to crankcase oil temperature change.
This thermostat has a built-in time delay of
one hour less than the length of the power
loss (up to 12 hours). When power is re-

17
stored to the system, heaters in the system
will begin to heat the crankcase oils. The
thermostat's time delay will lock out the
compressortopreventitsoperationuntilthe
compressor oil is sufficiently warmed. Dur-
ing the lockout time period, the auxiliary
heating system will operate to maintain a
setpoint temperature.
For example, if a power outage of three
hoursoccurs,thecompressorwillbelocked
out for two hours.
•TOTAL KEYPAD LOCKOUT — When op-
tion switch #3 is in the total keypad lockout
position (ON), programs cannot be altered
and all buttons are disabled.
Programming should be completed and bat-
tery should be installed before changing op-
tion switch #3.
Switch #1 set at installation (DO NOT CHANGE)
Switch #2 set at installation (DO NOT CHANGE)
Switch #3 ON
Switch #4 (see AUTOMATIC CHANGEOVER)
Switches #1 and #2 are set at installation
andshouldnotbechanged.To enable total
keypad lockout, move option switch #3 to
ON (see figure above). DO NOT MOVE
OPTIONSWITCHES#1OR#2,asthismay
affect thermostat operation [option switch
NOTE
ON
1234

18
#4enables/disablesautomatic changeover
(see AUTOMATIC CHANGEOVER)]. To disable total keypad lockout, move option switch #3 to OFF.
PROGRAMMING YOUR THERMOSTAT
Nowyouarereadytoprogram 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
thermostatforacommercialapplication(astore,
officebuilding,etc.),answerquestions1through
4. Ifyouareusingthethermostatinyourhome,
answer questions 5 through 8.
FOR COMMERCIAL APPLICATIONS:
1a. Whattimedoesthefirstpersonarriveatthe
building in the morning?
b. Whattemperature should the building beat
this time? (heating? cooling?)

19
2a. What time do the building occupants reach
amaximumactivitylevel(usinglights,equip-
ment, meeting rooms, etc.)?
b. Whattemperature should the building beat
this time?
3a. What time do the building occupants reach
a minimum activity level (limited personnel
in building)?
b. Whattemperature should the building beat
this time?
4a. Whattimedoesthebuildingbecomevacant?
b. Whattemperature should the building beat
this time?
IN YOUR HOME:
5a. Whattimedoesthefirstpersongetupinthe
morning?
b. What temperature should the house be at
this time?
6a. What time does the last person leave the
house in the morning?
b. What temperature should the house be at
this time?
7a. Whattimedoesthefirstpersonarrivehome
in the evening?
b. What temperature should the house be at
this time?
8a. Whattimedoes the last person go to bed at
night?
b. What temperature should the house be at
this time?
Now look at the factory preprogrammed times
andtemperaturesshownonthefollowingpage.
Ifthisprogramwillsuityourneeds,simplypress
RUN
PRGM
to begin running the factory preset pro-
gram.

20
Ifyouwanttochangethepreprogrammedtimes
and temperatures, follow these steps.
1. Determine the heating and cooling tem-
peratures you want to use. You may select
up to four heating temperatures (HEAT A,
HEAT B,HEAT C, and HEAT D), and up to
fourcoolingtemperatures(COOLA,COOL
B, COOL C, COOL D). Usethe table at the
right to write down the temperatures you
have selected.
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°F
70°F
70°F
64°F
1
2
3
4
5:00 AM
9:00 AM
4:00 PM
10:00 PM
78°F
82°F
78°F
78°F
FACTORY PREPROGRAMMING
Temperature
Designation
Factory
Preprogrammed
Temperature
Your
Selected
Temperature
HEAT A
HEAT B
HEAT C
HEAT D
COOL A
COOL B
COOL C
COOL D
70°F
64°F
---
---
78°F
82°F
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