White Rodgers 1F81-71 User manual

Topreventelectricalshockand/orequipmentdamage
disconnect electric power to system at main fuse or
circuit breaker box until installation is complete.
Do not use on circuits exceeding specified voltage.
Higher voltage will damage control and could cause
shock or fire hazard.
Do not short out terminals on gas valve or primary
control to test. Short or incorrect wiring will damage
thermostat and could cause personal injury and/or
property damage.
Printed in U.S.A.
DESCRIPTION
1F81-71
Programmable Electronic
Digital Automatic Changeover Multi-stage Thermostat
INSTALLATION AND
OPERATION INSTRUCTIONS
PART NO. 37-5938B
Replaces 37-5938A
9912
Operator: Save these instructions for future use!
FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY
BEFORE INSTALLING OR OPERATING THIS CONTROL COULD CAUSE
PERSONAL INJURY AND/OR PROPERTY DAMAGE.
YournewWhite-Rodgers5-Day/2-DayDigitalMulti-stageTher-
mostat uses the technology of a solid-state microcomputer to
provideprecisetime/temperaturecontrol.Thisthermostatoffers
youthe flexibilityto designheating andcooling programsthat fit
your needs.
Features:
• Separate5-day(weekday)and2-day(weekend)programming
with four separate time/temperature periods per program
• Simultaneous heat and cool program storage
• Optional Cterminal (dual power option)
• Optional Energy Management Recovery (EMR) PRECAUTIONS
SPECIFICATIONS
• Optional Band Oterminals
• Preprogrammed temperature control
• LCD continuously displays set point, and alternately dis-
plays time and room temperature
• Temperature override until next program period
• Manual program override (HOLD temperature)
•°F/°C convertibility
• Temperature range 45°to 90°F
• Two-stage heat/two-stage cool
• Armchair programming capability
Thisthermostatisintendedforusewitha24-voltsystem;donot
use this thermostat with a millivolt or line voltage system. If in
doubtaboutwhetheryourwiringismillivolt,line,orlowvoltage,
have it inspected by a qualified heating and air conditioning
contractor or electrician.
Do not exceed the specification ratings.
Allwiringmustconformtolocalandnationalelectricalcodesand
ordinances.
This control is a precision instrument, and should be handled
carefully.Roughhandlingordistortingcomponentscouldcause
the control to malfunction.
ELECTRICAL DATA
Electrical Rating:
20 to 30 VAC 50/60 Hz. or D.C.
0.05 to 1.5 Amps (Load per terminal)
2.5 Amps Maximum Total Load (All terminals combined)
THERMAL DATA
Setpoint Temperature Range:
45°F to 90°F (7°C to 32°C)
Operating Ambient Temperature Range:
32°F to 105°F
Operating Humidity Range:
0 to 90% RH (non-condensing)
Shipping Temperature Range:
-40°F to 150°F
APPLICATIONS
For use with:
• Heat/cool systems with up to two stages heat, two
stages cool
DO NOT USE WITH:
• Millivolt systems
• Systems exceeding 30 VAC and 2.5 amps
• 3-wire zoned hydronic heating systems
CAUTION
!
WARNING
!
WHITE-RODGERS DIVISION
EMERSON ELECTRIC CO.
9797 REAVIS ROAD
ST. LOUIS, MISSOURI 63123-5398
WHITE-RODGERS

2
INSTALLATION
REMOVE OLD THERMOSTAT
1. Shut off electricity at the main fuse box until installation is
complete. Ensure that electrical power is disconnected.
2. Remove the front cover of the old thermostat. With wires
still attached, remove wall plate from the wall. If the old
thermostathasawallmountingplate,removethethermostat
and the wall mounting plate as an assembly.
3. Identifyeachwireattachedtotheoldthermostatusingthe
labels enclosed with the new thermostat.
4. Disconnect the wires from old thermostat one at a time. DO
NOT LET WIRES FALL BACK INTO THE WALL.
5. Install new thermostat using the following procedures.
PRE-INSTALLATION SET-UP
1. Remove the packing material from the thermostat.
2. This thermostat is configured from the factory to operate a
heat/cool,fossil fuel(gas,oil,etc.),forced airsystemwithup
to 2 stages of heat and 2 stages of cool. It is configured
correctlyforanysystemthatDOESNOTrequirethethermo-
stat to energize the fan on a call for heat.
If your system is an electric heat or heat-pump system that
REQUIRES the thermostat to turn on the fan on a call for
heat, locate the GAS/ELECTRIC switch on the back of the
thermostat (see fig. 1) and switch it to the ELECTRIC
position. This will allow the thermostat to energize the fan
immediatelyonacallforheat.Ifyouareunsureiftheheating/
cooling system requires the thermostat to control the fan,
contact a qualified heating and air conditioning service
person.
3. Twojumpersare alsolocated ontheback ofthe thermostat,
so that you may customize the thermostat to meet your
individual preference (see fig. 1). In most applications, the
factory jumper settings provide the most comfortable and
convenient thermostat operation.
Jumper wire W905 determines how fast the system cycles
on and off, based on temperature change. As shipped from
the factory, the thermostat will maintain a very consistent
room temperature, usually within 1°F of the thermostat
setting. To achieve a slower on and off cycle, providing a
slightly wider temperature span, cut and separate jumper
wire W905.
JumperwireW903controlstheEnergyManagementRecov-
ery (EMR) feature. EMR allows the thermostat to energize
the heating system up to 30 minutes
before the time pro-
grammed into the thermostat. The thermostat will then
energize the system to gradually raise the temperature to
your programmed temperature by using the most efficient
stage of heat practical.
For example, assume that the thermostat is programmed
overnightto66°Fandtheroomtemperatureis66°.Ifthenext
programis7AM,70°F(anincreaseof4°),thethermostatwill
start the system 30 minutes before 7 AM. If the temperature
is in the room is within 2°F of your next programmed
temperature, the thermostat will not start the system early.
DO NOT clip jumper wire W903 unless you wish to perma-
nently disable the EMR feature.
INSTALLING THE THERMOSTAT
1. Gently remove the cover by pulling it straight off the base.
Forcing or prying on the unit may cause damage to the unit.
2. Remove the battery tab. With the batteries installed, the
Armchair Programming feature allows you to program the
thermostat before installing it on the wall.
3. Pullwiresthrough thehole inthethermostat baseand place
the base over the hole in the wall. Mark mounting hole
locations on the wall using the base as a template.
4. Move the base out of the way. Drill mounting holes.
5. Fasten the base loosely to the wall, as shown in fig. 2, using
twomountingscrews.Placealevelagainstthebottomofthe
base, adjust until level, and then tighten the screws. (Level-
ing is for appearance only and will not affect thermostat
operation.)Ifyou are usingexistingmounting holes, orif the
holesdrilledaretoolarge anddo notallow youtotightenthe
base snugly, use plastic screw anchors to secure the base.
6. Check that the system is turned off. Connect the wires
beneaththeterminalscrews onthebase usingtheappropri-
ate wiring diagram (see figs. 3 through 5).
7. Pushexcess wireinto walland plughole witha fire-resistant
material(suchasfiberglassinsulation)topreventdraftsfrom
affecting thermostat operation.
(Instructions continue on page 4.)
Figure 1. Back of thermostat base
W905
CUT FOR
LONGER
CYCLES
W903
CUT TO
DEFEAT EMR
GAS ELECTRIC
Figure 2. Thermostat base
Mounting
holes
Screw anchors
Alkaline batteries (3 “AA”–
install “+” ends to the left)
C
W2
R
GYY2
B
O
W
Reset
button

3
NOTE NOTE
The following wiring diagrams show typical terminal identifica-
tion and wiring. For proper installation, refer to the original
manufacturer's instructions.
Relay contacts shown are thermostatically operated.
C* R
Y2OB
Energized
in HEAT
Compressor
Contactor
Stage 1
Heat
Relay
Stage 1
Heat
Relay
Stage 2
Thermostat
Control
Circuit
24 VAC 120 VAC
Hot
Neutral
THERMOSTAT
SYSTEM
Y W W2
Figure 3. Typical wiring diagram for single transformer systems
Fan
Relay
G
TRANSFORMER
Compressor
Contactor
Stage 2
Energized
in COOL
* The 24 Volt neutral connection
to terminal Con the thermostat
is not required if you replace
the batteries once a year with
fresh “AA” Energizer
®
alkaline
batteries.
C* R
Y2
Compressor
Contactor
Stage 1
Heat
Relay
Stage 1
Heat
Relay
Stage 2
Thermostat
Control
Circuit
24 VAC 120 VAC
Hot
Neutral
THERMOSTAT
SYSTEM
Y W W2
Figure 4. Typical wiring diagram for two-transformer systems with NO safety circuits
Fan
Relay
G
TRANSFORMER
Compressor
Contactor
Stage 2
24 VAC120 VAC
Hot
Neutral
TRANSFORMER
TWO COMMONS MUST
BE JUMPERED TOGETHER!
CUT AND
TAPE OFF!
* The 24 Volt neutral connection
to terminal Con the thermostat
is not required if you replace
the batteries once a year with
fresh “AA” Energizer®alkaline
batteries.
O
Energized
in COOL
B
Energized
in HEAT
C* R
Y2
Compressor
Contactor
Stage 1
Heat
Relay
Stage 1
Heat
Relay
Stage 2
Thermostat
Control
Circuit
Limit or
Safety
Switches
Limit or
Safety
Switches
Limit or
Safety
Switches
Limit or
Safety
Switches
24 VAC 120 VAC
Hot
Common
Common
Neutral
THERMOSTAT
SYSTEM
Y W W2
Figure 5. Typical wiring diagram for two-transformer systems with safety circuits in BOTH systems
Fan
Relay
G
HEATING
TRANSFORMER
Compressor
Contactor
Stage 2
24 VAC 120 VAC Hot
Neutral
COOLING
TRANSFORMER
TWO COMMONS MUST
BE JUMPERED TOGETHER!
24 VAC
Accessory
Relay N.O.
Contact
* The 24 Volt neutral connection
to terminal Con the thermostat
is not required if you replace
the batteries once a year with
fresh “AA” Energizer
®
alkaline
batteries.
O
Energized
in COOL
B
Energized
in HEAT

4
CHECK THERMOSTAT OPERATION
If at any time during testing, your system does not operate
properly, contact a qualified serviceperson.
Fan Operation
1. Turn on power to the system.
2. Press SYSTEM button until the system is OFF.
3. MoveFANswitchtoON.Theblowershouldbegintooperate.
4. MoveFANswitchto AUTOposition. Theblowershould stop
within a short period of time.
Heating System
1. Press SYSTEM button to turn thermostat to HEAT.
2. Press toadjustthermostatsettingto90°andholdforfive
seconds. After you release the button, both stages of the
heatingsystemshould begintooperate withinfiveseconds.
3. Press toadjusttemperaturesettingbelowroomtempera-
ture. The auxiliary heating system will stop immediately and
the first stage will stop within three to four minutes.
Cooling System
Topreventcompressorand/orpropertydamage,ifthe
outdoor temperature is below 50°F, DO NOT operate
the cooling system.
1. Press SYSTEM button to turn thermostat to COOL.
2. Press toadjustthermostatsettingto45°andholdforfive
seconds. After you release the button, the blower should
come on immediately on high speed, followed by cold air
circulation. Both stages of the cooling system should begin
to operate (if you have a two-stage cooling system).
NOTE
CAUTION
!
LOCKOUT BYPASS OPTION
FOR QUALIFIED SERVICE TECHNICIANS’ USE
ONLY.OPERATORSSHOULDNOTUSETHISFEA-
TURE DUE TO POSSIBILITY OF EQUIPMENT OR
PROPERTY DAMAGE, OR PERSONAL INJURY.
COMPRESSOR SHORT TERM
CYCLE PROTECTION
This thermostat has a built-in short term (5-minute)
time delay. During this 5-minute period, the thermo-
stat will lock out the compressor to allow head pres-
sure to stabilize. If you want to override this feature
while testing thermostat operation, simply press
and buttons at the same time.
DO NOT USE THE LOCKOUT BYPASS OPTION
UNLESSTHECOMPRESSOROILHEATERSHAVE
BEEN OPERATIONAL FOR 6 HOURS AND THE
SYSTEMHASNOT BEENOPERATIONALFORAT
LEAST 5 MINUTES.
Ifthefanisrunningbutthecompressorisnotrunningandthe
word COOL is flashing, the compressor lockout feature is
operating (see Lockout Bypass Option to temporarily
override the compressor lockout feature during testing).
3. Press toadjusttemperaturesettingaboveroomtempera-
ture. The cooling system should stop operating.
During normal operation, the second stage of heat or cool may
take15 to30 minutesto turnon. Thedelay variesdepending on
theperformanceofthefirststage.Typicallythesecondstagewill
comeonsoonerinmoresevereweather,whileinmilderweather
it will take longer. There is no adjustment to this feature, as it is
designed to maximize both comfort and efficiency.
NOTE

5
OPERATION
Before you begin programming your thermostat, you should be
familiarwithitsfeaturesandwiththedisplayandthelocationand
operationofthethermostatbuttons.Yourthermostatconsistsof
two parts: the thermostat cover and the base. To remove the
cover, gently pull it straight out from the base. To replace the
cover, line up the cover with the base and press gently until the
cover snaps onto the base.
THE THERMOSTAT BASE
Other than and , the following buttons and switches are
located behind the door on the bottom of the thermostat cover
(see fig. 6). Pull the door down to open it.
The Thermostat Buttons and Switches
1
(Red arrow) Raises temperature setting.
2
(Blue arrow) Lowers temperature setting.
3SET TIME button.
4VIEW PRGM (program) button.
5RUN PRGM (program) button.
6HOLD TEMPerature button.
7SYSTEM button (COOL, OFF, HEAT, AUTO).
8FAN switch (ON, AUTO).
The Display
9Indicates day of the week.
10 HEAT is displayed when the SYSTEM button has been
pressed to put the thermostat in the HEAT mode. COOL is
displayed when the SYSTEM button has been pressed to
put the thermostat in the COOL mode. COOL is displayed
(flashing) when the compressor is in lockout mode. AUTO
isdisplayed whentheSYSTEM buttonhasbeenpressedto
put the thermostat in the automatic changeover (AUTO)
mode.1+2indicatesthe numberof stagesthethermostatis
calling for.
11 Alternately displays current time and temperature.
12
The word HOLD is displayed when the thermostat is in the
HOLD mode.
13
BATT is displayed when approximately 70% of battery life
has been exhausted.
14
Displays currently programmed set temperature (this is
blank when SYSTEM button has been pressed to turn the
system OFF).
15
LK is displayed when keypad lockout has been activated.
OPERATING FEATURES
Now that you are familiar with the thermostat buttons and
display, read the following information to learn about the many
features of the thermostat.
•SIMULTANEOUS HEATING/COOLING PROGRAM
STORAGE—Whenprogramming,youcanenterbothyour
heatingandcoolingprogramsatthesametime.Thereisno
need to reprogram the thermostat at the beginning of each
season.
Figure 6. Thermostat display, buttons, and switches
3
2
1
4 5 6 7 8
SU
HOLD AUTO
SA
P
MO TU WE TH FR
LK
9 91110
101012
BATT
131415
11
COOL-OFF-HEAT-AUTO
AUTO
SET TIME VIEW PRGM RUN PRGM HOLD TEMP FAN ONSYSTEM
COOL 1+2
HEAT 1+2
•AUTOMATIC CHANGEOVER —If you have a heating/
coolingsystem,youcansetthethermostattoautomatically
switch from heat to cool as needed to maintain setpoint
temperature. To select this mode, press SYSTEM button
until AUTO is displayed along with HEAT or COOL, iden-
tifying the program automatically selected.
In AUTO mode, pressing and at the same time will
change the displayed setpoint temperature to the setpoint
of the other mode (HEAT or COOL). This allows you to
change both the HEAT and COOL setpoints, if desired.
•TOTAL KEYPAD LOCKOUT — This security feature al-
lowsyou tolock outthe thermostatbuttons andswitches to
preventunauthorizedtampering.Toselectthisfeatureafter
programming,pressSETTIMEandRUNPRGMbuttonsat
thesametimeandholduntilLKisdisplayed.Tounlockthe
thermostat, press SET TIME and RUN PRGM buttons at
the same time until LK is no longer displayed.
•TEMPERATURE OVERRIDE — Press or until the
display shows the temperature you want. The thermostat
will override current programming and keep the room
temperature at the selected temperature until the next
program period begins. Then the thermostat will automati-
cally revert to the program.
•HOLD TEMPERATURE — The thermostat can hold any
temperaturewithinitsrangeforanindefiniteperiod,without
revertingtotheprogrammedtemperature.PresstheHOLD
TEMP button. HOLD will be displayed. Then choose the
desired hold temperature by pressing or . The ther-
mostat will hold the room temperature at the selected
setting until you press RUN PRGM button to start program
operation again.
•°F/°C CONVERTIBILITY — Press SET TIME and HOLD
TEMPbuttonsuntilthetemperaturedisplayisinCelsius.To
display Fahrenheit, repeat the process.
(Instructions continue on page 6.)

6
•TEMPERATURE DISPLAY ADJUSTMENT — Your new
thermostathasbeenaccuratelysetinourfactory.However,
if you wish, you may adjust your new thermostat tempera-
ture display to match your old thermostat. This can be
accomplished (within a ±4°F range) as follows:
1. Press VIEW PRGM and HOLD TEMP buttons at the
same time.
2. Press or to adjust the displayed temperature to
your desired setting.
3. PressRUNPRGMtoresumenormalprogramoperation.
PROGRAMMING YOUR THERMOSTAT
Nowyouarereadytoprogramyourthermostat.Thissectionwill
help you plan your thermostat’s program to meet your needs.
For maximum comfort and efficiency, keep the following guide-
lines in mind when planning your program.
• When heating (cooling) your building, program the tem-
peraturestobecooler(warmer)whenthebuildingisvacant
or during periods of low activity.
• During early morning hours, the need for cooling is usually
minimal.
Look at the factory preprogrammed times and temperatures
shownbelow.Ifthisprogramwillsuityourneeds,simplypressthe
RUN PRGM button to begin running the factory preset program.
If you want to change the preprogrammed times and tempera-
tures, follow these steps.
Determine the time periods and heating and cooling tempera-
tures for your weekday and weekend programs. You must
program four periods for both the weekday and weekend pro-
gram. However, you may use the same heating and cooling
temperatures for consecutive time periods. You can choose
start times, heating temperatures, and cooling temperatures
independently for both weekday and weekend programs (for
example, you may select 5:00 AM and 70°as the weekday 1st
period heating start time and temperature, and also choose
7:00 AM and 76°as the weekday 1st period cooling start time
and temperature).
Usethetableatthebottomofthepagetoplanyourprogramtime
periods,andthetemperaturesyouwantduringeachperiod.You
mayalsowanttolookatthesampleprogramtabletogetanidea
of how the thermostat can be programmed.
Entering Your Program
Follow these steps to enter the heating and cooling programs
you have selected.
Set Current Time and Day
1. PressSETTIMEbuttononce.Thedisplaywillshowthehour
only.
EXAMPLE:
P
2. Press and hold either or until you reach the correct
hour (the letter Pshould be displayed for PM time, which
begins at noon).
3. Press SET TIME once. The display window will show the
minutes only.
EXAMPLE:
4. Press and hold either or until you reach the correct
minutes.
5. Press SET TIME once. The display will show the day of the
week.
6. Press or until you reach the current day of the week.
7. Press RUN PRGM once. The display will show the correct
time and room temperature alternately.
Enter Heating Program
1. Ifyouwant tochange thedisplayfrom Fahrenheitto Celsius
(or vice-versa), press SET TIME and HOLD TEMP at the
same time.
2. Press the SYSTEM button until HEAT is displayed.
3. PressVIEWPRGM once.“MO TU WE TH FR”(indicating
weekday program) will be displayed. Also displayed are
the currently programmed start time for the 1st heating
period and the currently programmed temperature
(flashing).
Heating Program for
ALL days of the Week: Cooling Program for
ALL Days of the Week:
PERIOD TIME TEMP PERIOD TIME TEMP
1st
2nd
3rd
4th
6:00 AM
8:00 AM
5:00 PM
10:00 PM
70°F
62°F
70°F
62°F
1st
2nd
3rd
4th
6:00 AM
8:00 AM
5:00 PM
10:00 PM
78°F
85°F
78°F
82°F
FACTORY PREPROGRAMMING
WEEKDAY (5 DAY) WEEKEND (2 DAY)
Start
Time Temperature Start Time Temperature
1ST HEAT
2ND HEAT
3RD HEAT
4TH HEAT
1ST COOL
2ND COOL
3RD COOL
4TH COOL
Heating/Cooling Schedule Plan
Period
WEEKDAY (5 DAY) WEEKEND (2 DAY)
Start
Time Temperature Start Time Temperature
1ST HEAT
2ND HEAT
3RD HEAT
4TH HEAT
1ST COOL
2ND COOL
3RD COOL
4TH COOL
SAMPLE
Heating/Cooling Schedule Plan
Period
5:30 AM
8:00 AM
5:00 PM
10:30 PM
6:30 AM
2:00 PM
5:00 PM
10:30 PM
7:00 AM
11:00 AM
6:00 PM
11:30 PM
7:00 AM
12:30 PM
6:00 PM
11:30 PM
68°F
70°F
70°F
65°F
76°F
74°F
72°F
78°F
68°F
65°F
70°F
65°F
76°F
78°F
72°F
78°F

7
EXAMPLE:
MO TU WE TH FR
This display window shows that for the 1st weekday period,
the start time is 6:00 AM, and 70°is the programmed
temperature(thisexamplereflectsfactorypreprogramming).
4. Press or tochangethe displayedtemperature toyour
selected temperature for the 1st heating program period.
5. Press SET TIME once (the programmed time will flash).
Press or untilyourselectedtimeisdisplayed.Thetime
will change in 15 minute increments. When your selected
time is displayed, press SET TIME again to return to the
change temperature mode.
6. Press VIEW PRGM once. The currently programmed start
time and setpoint temperature for the 2nd heating program
period will be displayed.
7. Repeat steps 4 and 5 to select the start time and heating
temperature for the 2nd heating program period.
8. Repeatsteps4through6forthe3rdand4thheatingprogram
periods. Weekday heating programs are now complete.
9. Press VIEW PRGM once. “SA SU” (indicating weekend
program) will be displayed, along with the start time for the
1st heating period and the currently programmed tempera-
ture.
10.Repeat steps 4 through 8 to complete weekend heating
programming.
11.When you have completed entering your heating program,
press RUN PRGM.
Enter Cooling Program
If the outside temperature is below 50°F, disconnect
power to the cooling system before programming.
Energizing the air conditioner compressor during
cold weather may cause personal injury or property
damage.
1. Press SYSTEM button until COOL is displayed.
2. Follow the procedure for entering your heating program,
using your selected cooling times and temperatures.
CAUTION
!
CHECK YOUR PROGRAMMING
Follow these steps to check your thermostat programming one
final time before beginning thermostat operation.
1. Press SYSTEM button until HEAT is displayed.
2. Press VIEW PRGM to view the 1st weekday heating period
time and temperature. Each time you press VIEW PRGM,
the next heating period time and temperature will be dis-
played in sequence for weekday, then weekend program
periods(youmaychangeanytimeortemperatureduringthis
procedure).
3. Press RUN PRGM.
4. Press SYSTEM button until COOL is displayed.
5. Repeat step 2 to check cooling temperatures.
6. Press RUN PRGM to begin program operation.
7. Press SYSTEM button to select HEAT, COOL, or AUTO
mode.
YOUR THERMOSTAT IS NOW COMPLETELY PRO-
GRAMMED AND READY TO AUTOMATICALLY PROVIDE
MAXIMUM COMFORT AND EFFICIENCY!
During normal operation, the second stage of heat or cool may
take15 to30 minutesto turnon. Thedelay variesdepending on
theperformanceofthefirststage.Typicallythesecondstagewill
comeonsoonerinmoresevereweather,whileinmilderweather
it will take longer. There is no adjustment to this feature, as it is
designed to maximize both comfort and efficiency.
TROUBLESHOOTING
If your thermostat’s display is frozen or displaying incorrectly,
the thermostat may have been affected by static discharge or
voltagevariations.Ifthishappens,presstheRESETbutton(see
fig.2,page2forthelocationofthebutton).PressingtheRESET
buttonwillclearalluserprogramming.Thethermostatwillrevert
to factory preprogramming. You will need to reset the time and,
if desired, reprogram the thermostat to your selected program.
If pressing the RESET button does not correct the problem,
contact a qualified service technician.
For optimum performance, we recommend replacing batteries
once a year with fresh “AA” Energizer®alkaline batteries.
NOTE