Emerson 1F94-80 User manual

OPERATION GUIDE
7 Day Multi-stage/Heat Pump
Electronic Digital Thermostat
1F94-80
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
PROGRAMMING YOUR
THERMOSTAT ................................... 19
PLANNING FOR YOUR NEEDS
ENTERING YOUR PROGRAM
Set Current Time and Day
Program Heating/Cooling
Temperatures
Enter Heating Program
Enter Cooling Program
Using the HOLD/COPY Button
CHECK YOUR PROGRAMMING
QUESTIONS AND ANSWERS................ 34
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
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
• Twoseparatetime/temperaturesettingsper
24-hour period (occupied and unoccupied)
• Armchair programming capability
• Up to 2 stages of heat and up to 2 stages of
cool
• Dampercontrolandprogrammablefanwhen
the occupied temperature is selected
• 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
• Blower delay in the cooling cycle
• Audio and visual prompting during opera-
tion
• 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

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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
pivot up. To attach the thermostat body, 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.
Before you begin programming your thermo-
stat,youshouldbefamiliarwithitsfeaturesand
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 ther-
mostat body and the subbase.
Use
SYSTEM
SWITCH
to turn thermostat to OFF
mode before removing or attaching the
thermostat body. Equipment damage
and/or personal injury could occur.
CAUTION
!

6
PARTS OF THE THERMOSTAT
The Back of The Thermostat Body
Turnthe thermostat body over. On the backare
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®

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alkaline battery. The battery will provide
power for all functions except the display
light, which works only on 24VAC power.
Use
SYSTEM
SWITCH to turn thermostat to OFF
mode before removing thermostat from
the wall to replace the battery.
2. You may adjust the option switches for
energymanagementrecoveryandtotalkey-
pad lockout (see OPERATING FEA-
TURES).
CAUTION
!
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
FAN AUTO is displayed during automatic
fan operation (when the blower cycles with
theheatingorcoolingsystem).PRGFANis
displayed when the fan has been pro-
grammed to run continuously during the
occupied program period.
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, HLD). During
programming, the day of the week and the
period (occupied or unoccupied) are dis-
played (MO O, TU O, WE U, etc.).
Alternately displays room temperature (F
denotesdegreesFahrenheitandCdenotes
degrees Celsius) and time of day (Ade-
notes AM time and Pdenotes PM time).
Duringprogramming,when
VIEW
TEMP
ispressed,
the heating or cooling mode and period
currently being programmed are displayed
(HEAT O, COOL U, etc.)
Displays the setpoint temperature (this dis-
play is blank in the AUTO mode).
1
2
4
5
3

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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
45
BATTERY
PRG FAN
2
3
4
EMER. PUMP
MALF. AUX.
FAN AUTOPRG FAN

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Usedwith and toselectsetpoint
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
is maintaining the setpoint temperature).
The Thermostat Buttons
Sets the system mode (HEATing, OFF,
COOLing, or AUTOmatic changeover).
Selects fan operation (see #4, 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).
6
7
8
9
10
11
17
15
14
13
16
12

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thatthe heat pump compressor is function-
ing — a flashing PUMP light indicates that
the compressor is locked out. AUX light
indicates that the auxiliary system is oper-
ating.
MALF light indicates a heat pump system
malfunction (refer to heat pump
manufacturer's operating manual). A con-
tinuous(non-flashing)PUMPlightindicates
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
910 11 12 13 14
15 16
8
6
7
17
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.
This feature is enabled by option switch #3.
To enable the EMR function, you must
move option switch #3 (located on the back
of the thermostat body) to the ON position.
To do this, press
SYSTEM
SWITCH
until OFF is dis-
played. Remove the thermostat body from
the wall, turn it over, and check the position
of option switch #3. If the switch is ON (up),
simply put the thermostat back on the wall
andpress
SYSTEM
SWITCH
untilthedesiredoperat-
ing mode is displayed. If the switch is OFF

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screwdriver to move option switch #3 to the
OFF (down) position. Put the thermostat
backonthewallandpress
SYSTEM
SWITCH
untilthe
desired operating mode is displayed.
•AUTOMATIC CHANGEOVER — You can
set the thermostat to automatically switch
the system from heating to cooling as
needed.Tosetthethermostatforautomatic
changeover after programming, press
SYSTEM
SWITCH
tosetthethermostattoAUTO (the
setpointtemperaturedisplayis blank in the
AUTO mode). The system will now auto-
matically switch between heating and cool-
ing,dependingontheactualroomtempera-
ture.
In the AUTO mode, the thermostat will not
allow the temperature separation between
(down),useapencilorsmallscrewdriverto
move the switch to the ON position (see
figure below). Put the thermostat back on
thewallandpress
SYSTEM
SWITCH
untilthedesired
operating mode is displayed.
EMR (ON)
Switch #1 set at installation (DO NOT CHANGE)
Switch #2 set at installation (DO NOT CHANGE)
Switch #3 ON
Switch #4 (see TOTAL KEYPAD LOCKOUT)
To disable EMR, press
SYSTEM
SWITCH
until OFF
is displayed. Remove the thermostat body
from the wall and use a pencil or small
ON
1234

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79
78
77
76
75
74
COOLING TEMPERATURES
HEATING TEMPERATURES
DEAD BAND
the highest heat setting and the lowest cool
setting to be less than 1°F. For example, if
the highest heat setting is 76°F, the lowest
cool setting cannot be below 77°F (see
diagram below).
•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.
We do not recommend using the temperature
override feature when the thermostat is in the
AUTO mode. If you press or in the
AUTO mode, the thermostat will revert to the
mode(heatorcool)inwhichitlastcycledandwill
preventautomaticswitchingfortwohours.Ifyou
dopress or in the AUTO mode, you
maypress
RUN
PRGM
toreturntoprogrammedopera-
tion in the AUTO mode.
•HOLD TEMPERATURE — Thethermostat
can hold any temperature within its range
for an indefinite period, without reverting to
the program. Press
HOLD
COPY
. HLD will be dis-
played. Then choose the desired hold tem-
perature by pressing or . The
NOTE

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thermostat will hold the room temperature
at the selected setting until you press
RUN
PRGM
to start program operation again. This fea-
ture is ideal for energy conservation when
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.
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
CAUTION
!

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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
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.
•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

17
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.
•TOTAL KEYPAD LOCKOUT — When op-
tion switch #4 is in the total keypad lockout
position (ON), programs cannot be altered
and all buttons are disabled.
NOTE
ON
1234
Programming should be completed and bat-
tery should be installed before changing op-
tion switch #4.
TOTAL KEYPAD LOCKOUT (ON)
Switch #1 set at installation (DO NOT CHANGE)
Switch #2 set at installation (DO NOT CHANGE)
Switch #3 (see EMR)
Switch #4 ON
To enable total keypad lockout, press
SYSTEM
SWITCH
untilOFF isdisplayedandremove
the thermostat body from the wall. Press

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SYSTEM
SWITCH
untilthedesiredoperatingmode
is displayed. Turn the thermostat body
over. Use a pencil or small screwdriver to
move option switch #4 to ON (see figure on
previouspage).Replacethethermostatbody
onthewall.After moving switch #4 to the
ONposition,youwillnotbeabletomake
anychangestothermostatprogramming
oroperation(allbuttonswillbedisabled).
To disable total keypad lockout, move op-
tion switch #4 to OFF.

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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
decide what your needs are.
1a. Whattimedoesthefirstpersonarriveatthe
building in the morning?
b. Whattemperature should the building beat
this time? (heating? cooling?)
2a. What time does the building become va-
cant?
b. Whattemperature should the building beat
this time?
PROGRAMMING YOUR THERMOSTAT

20
Now look at the factory preprogrammed times
andtemperaturesshownbelow. Ifthisprogram
will suit your needs, simply press
RUN
PRGM
to begin
running the factory preset program.
Ifyouwanttochangethepreprogrammedtimes
and temperatures, determine the heating and
cooling times and temperatures you want to
use. Use the following table to plan your pro-
gram time periods and temperatures. You may
alsowanttolookatthesampleprogramtableto
get an idea of how the thermostat can be pro-
grammed. You will select two heating tempera-
tures (HEAT O for occupied temperature and
HEAT U for unoccupied temperature) and two
cooling temperatures (COOL O and COOL U).
To operate properly in the AUTO mode, the
highest heat temperature cannot be the same
asorhigherthanthelowestcooltemperature(or
vice versa); see diagram below.
Heating Program for ALL days of the Week:
PERIOD TIME TEMP
Occupied (O)
Unoccupied (U) 8:00 AM 5:00 PM 70
64
FAN
PRG
AUTO
DAMPER
Open
Closed
FACTORY PREPROGRAMMING
Cooling Program for ALL days of the Week:
PERIOD TIME TEMP
Occupied (O)
Unoccupied (U) 8:00 AM 5:00 PM 78
82
FAN
PRG
AUTO
DAMPER
Open
Closed
NOTE
79
78
77
76
75
74
COOLING TEMPERATURES
HEATING TEMPERATURES
DEAD BAND