1F80-71
Programmable Electronic
Digital Automatic Changeover Single Stage Thermostat
INSTALLATION AND
WHITE-RODGERS
OPERATION INSTRUCTIONS
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.
DESCRIPTION
Your new White-Rodgers 5-Day/2-Day Single Stage Digital
Thermostat uses the technology of a solid-state microcomputer
to provide precise time/temperature control. This thermostat
offers you the flexibility to design heating and cooling programs
that fit your needs.
• Optional Energy Management Recovery (EMR)
• Optional B and O terminals
• 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
Features:
• Separate 5-day (weekday) and 2-day (weekend) programming
with four separate time/temperature periods per program
• Temperature range 45° to 90°F
• Keypad lockout
• Armchair programming capability
• Simultaneous heat and cool program storage
• Automatic changeover
• Optional C terminal (dual power option)
PRECAUTIONS
CAUTION
Thisthermostatisintendedforusewitha24-voltsystem;donot
use this thermostat with a millivolt or line voltage system. If in
doubt about whether your wiring is millivolt, line, or low voltage,
have it inspected by a qualified heating and air conditioning
contractor or electrician.
!
To prevent electrical shock and/or equipment damage
disconnect electric power to system at main fuse or
circuit breaker box until installation is complete.
Do not exceed the specification ratings.
WARNING
!
Allwiringmustconformtolocalandnationalelectricalcodesand
ordinances.
Do not use on circuits exceeding specified voltage.
Higher voltage will damage control and could cause
shock or fire hazard.
This control is a precision instrument, and should be handled
carefully. Roughhandlingordistortingcomponentscouldcause
the control to malfunction.
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.
SPECIFICATIONS
ELECTRICAL DATA
APPLICATIONS
Electrical Rating:
For use with:
8 to 30 VAC 50/60 Hz. or D.C.
0.05 to 1.5 Amps (Load per terminal)
1.5 Amps Maximum Total Load (All terminals combined)
•
•
•
•
Standard heat/cool or heat only systems
Electric heat systems
Gas or oil fired systems
Gas systems with intermittent ignition devices (I.I.D.)
and/or vent dampers
Hydronic (hot water or steam) systems
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
•
DO NOT USE WITH:
•
•
•
•
Multi-stage systems
Systems exceeding 30 VAC and 1.5 amps
Millivolt systems
3-wire zoned hydronic heating systems
WHITE-RODGERS DIVISION
PART NO. 37-6120A
EMERSON ELECTRIC CO.
9797 REAVIS ROAD
Printed in U.S.A.
9934
ST. LOUIS, MISSOURI 63123-5398
NOTE
NOTE
The following wiring diagrams show typical terminal identifica- Relay contacts shown are thermostatically operated.
tion and wiring. For proper installation, refer to the original
manufacturer's instructions.
* The 24 Volt neutral connection
to terminal C on the thermostat
is not required if you replace
Thermostat
the batteries once a year with
Control
fresh “AA” Energizer® alkaline
batteries.
Circuit
THERMOSTAT
C*
R
B
O
Y
G
W
SYSTEM
Energized
in HEAT
Cooling
System
Heating
System
Hot
24 VAC
120 VAC
Neutral
Fan
Energized
in COOL
Relay
TRANSFORMER
Figure 3. Typical wiring diagram for single transformer systems
* The 24 Volt neutral connection
to terminal C on the thermostat
is not required if you replace
the batteries once a year with
fresh “AA” Energizer® alkaline
batteries.
Thermostat
Control
Circuit
THERMOSTAT
SYSTEM
CUT AND
TAPE OFF!
B
C*
R
Y
G
O
W
Hot
Cooling
System
Energized
in COOL
Heating
System
120 VAC
24 VAC
Hot
Neutral
24 VAC
120 VAC
Neutral
TRANSFORMER
Energized
in HEAT
Fan
Relay
TRANSFORMER
TWO COMMONS MUST
BE JUMPERED TOGETHER!
Figure 4. Typical wiring diagram for two-transformer systems with NO safety circuits
* The 24 Volt neutral connection
Thermostat
to terminal C on the thermostat
Control
is not required if you replace
Circuit
the batteries once a year with
fresh “AA” Energizer® alkaline
THERMOSTAT
SYSTEM
batteries.
B
C*
R
Y
G
O
W
Heating
System
Cooling
System
Energized
in COOL
Limit or
Safety
Switches
Limit or
Safety
Switches
Hot
24 VAC
120 VAC
Neutral
Energized
in HEAT
Fan
24 VAC
Accessory
Relay N.O.
Contact
HEATING
TRANSFORMER
Relay
Common
Limit or
Safety
Switches
Limit or
Safety
Switches
Hot
TWO COMMONS MUST
BE JUMPERED TOGETHER!
24 VAC
120 VAC
Common
Neutral
COOLING
TRANSFORMER
Figure 5. Typical wiring diagram for two-transformer systems with safety circuits in BOTH systems
3
CHECK THERMOSTAT OPERATION
LOCKOUT BYPASS OPTION
NOTE
FOR QUALIFIED SERVICE TECHNICIANS’ USE
ONLY.OPERATORSSHOULDNOTUSETHISFEA-
TURE DUE TO POSSIBILITY OF EQUIPMENT OR
PROPERTY DAMAGE, OR PERSONAL INJURY.
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.
COMPRESSOR SHORT TERM
CYCLE PROTECTION
2. Press SYSTEM button until the system is OFF.
3. MoveFANswitchtoON.Theblowershouldbegintooperate.
4. Move FAN switch to AUTO position. The blower should stop
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
within a short period of time.
Heating System
1. Press SYSTEM button until HEAT is displayed. Iftheheating
while testing thermostat operation, simply press
system has a standing pilot, be sure to light it.
and
buttons at the same time.
2. Press
to adjust thermostat setting above room tempera-
ture. The heating system should begin to operate.
DO NOT USE THE LOCKOUT BYPASS OPTION
UNLESSTHECOMPRESSOROILHEATERSHAVE
BEEN OPERATIONAL FOR 6 HOURS AND THE
SYSTEM HAS NOT BEEN OPERATIONAL FOR AT
LEAST 5 MINUTES.
3. Press
to adjust temperature setting below room tem-
perature. The heating system should stop operating.
Cooling System
This thermostat has a built-in short-term (5-minute) time delay.
This feature is activated after the compressor shuts down and
the setpoint is changed within the 5-minute period. During this
5-minute period, COOL will flash on the display indicating that
the thermostat has locked out the compressor to allow head
pressure to stabilize. This thermostat does not sense AC power
loss and therefore does not activate the short term compressor
protection feature when power is restored.
CAUTION
!
Topreventcompressorand/orpropertydamage, ifthe
outdoor temperature is below 50°F, DO NOT operate
the cooling system.
1. Press SYSTEM button until COOL is displayed.
2. Press
to adjust thermostat setting below room tempera-
ture.Theblowershouldcomeonimmediatelyonhighspeed,
followed by cold air circulation
3. Press
to adjust temperature setting above room tem-
perature. The cooling system should stop operating.
4
OPERATION
Before you begin programming your thermostat, you should be
familiarwithitsfeaturesandwiththedisplayandthelocationand
operation of the thermostat buttons. Your thermostat consists of
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.
1
2
THE THERMOSTAT BASE
SET TIME VIEW PRGM RUN PRGM HOLD TEMP
SYSTEM
FAN ON
AUTO
Other than
and
, the following buttons and switches are
COOL-OFF-HEAT-AUTO
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
3
4
5
6
7
8
(Red arrow) Raises temperature setting.
(Blue arrow) Lowers temperature setting.
SET TIME button.
1
2
3
4
5
6
7
8
9
10
11
9
MO TU WE TH FR
P
SA SU
HEAT ON
11
LK
COOL ON
VIEW PRGM (program) button.
RUN PRGM (program) button.
HOLD TEMPerature button.
BATT HOLD AUTO
15 14
13 12 10 10
Figure 6. Thermostat display, buttons, and switches
SYSTEM button (COOL, OFF, HEAT, AUTO).
FAN switch (ON, AUTO).
• AUTOMATIC CHANGEOVER —If you have a heating/
cooling system, you can set the thermostat to automatically
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.
The Display
Indicates day of the week.
9
HEAT is displayed when the SYSTEM button has been
10
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
is displayed when the SYSTEM button has been pressed to
put the thermostat in the automatic changeover (AUTO)
mode. ON indicates that the heating or cooling system is
running.
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-
lows you to lock out the thermostat buttons to prevent
unauthorized tampering. To select this feature after pro-
gramming, pressSETTIMEandRUNPRGMbuttonsatthe
same time and hold until LK is displayed. To unlock the
thermostat, press SET TIME and RUN PRGM buttons at
the same time until LK is no longer displayed.
Alternately displays current time and temperature.
11
12
The word HOLD is displayed when the thermostat is in the
HOLD mode.
• TEMPERATURE OVERRIDE — Press
or
until the
BATT is displayed when approximately 70% of battery life
13
14
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
has been exhausted.
Displays currently programmed set temperature (this is
blank when SYSTEM button has been pressed to turn the
system OFF).
LK is displayed when keypad lockout has been activated.
15
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.
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.
• SIMULTANEOUS HEATING/COOLING PROGRAM
STORAGE—Whenprogramming,youcanenterbothyour
heating and cooling programs at the same time. There is no
need to reprogram the thermostat at the beginning of each
season.
• °F/°C CONVERTIBILITY — Press SET TIME and HOLD
TEMPbuttonsuntilthetemperaturedisplayisinCelsius.To
display Fahrenheit, repeat the process.
(Instructions continue on page 6.)
5
• TEMPERATURE DISPLAY ADJUSTMENT — Your new Usethetableatthebottomofthepagetoplanyourprogramtime
thermostathasbeenaccuratelysetinourfactory.However, periods,andthetemperaturesyouwantduringeachperiod.You
if you wish, you may adjust your new thermostat tempera- may also want to look at the sample program table to get an idea
ture display to match your old thermostat. This can be of how the thermostat can be programmed.
accomplished (within a ±4°F range) as follows:
1. Press VIEW PRGM and HOLD TEMP buttons at the
same time.
Entering Your Program
Follow these steps to enter the heating and cooling programs
you have selected.
2. Press
or
to adjust the displayed temperature to
your desired setting.
3. PressRUNPRGMtoresumenormalprogramoperation.
Set Current Time and Day
1. Press SET TIME button once. The display will show the hour
only.
PROGRAMMING YOUR THERMOSTAT
Now you are ready to program your thermostat. This section will
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.
P
EXAMPLE:
2. Press and hold either
or
until you reach the correct
• When heating (cooling) your building, program the tem-
peratures to be cooler (warmer) when the building is vacant
or during periods of low activity.
hour (the letter P should be displayed for PM time, which
begins at noon).
3. Press SET TIME once. The display window will show the
minutes only.
• During early morning hours, the need for cooling is usually
minimal.
Look at the factory preprogrammed times and temperatures
shown below. If this program will suit your needs, simply press the
RUN PRGM button to begin running the factory preset program.
EXAMPLE:
FACTORY PREPROGRAMMING
4. Press and hold either
minutes.
or
until you reach the correct
Cooling Program for
ALL Days of the Week:
Heating Program for
ALL days of the Week:
TEMP
PERIOD
TIME
TEMP
PERIOD
1st
2nd
3rd
4th
TIME
5. Press SET TIME once. The display will show the day of the
week.
70°F
62°F
70°F
62°F
1st
2nd
3rd
4th
6:00 AM
8:00 AM
5:00 PM
10:00 PM
6:00 AM
8:00 AM
5:00 PM
10:00 PM
78°F
85°F
78°F
82°F
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.
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).
Enter Heating Program
1. If you want to change the display from Fahrenheit to Celsius
(or vice-versa), press SET TIME and HOLD TEMP at the
same time.
2. Press the SYSTEM button until HEAT is displayed.
3. Press VIEW PRGM 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).
SAMPLE
Heating/Cooling Schedule Plan
Heating/Cooling Schedule Plan
WEEKEND (2 DAY)
WEEKDAY (5 DAY)
WEEKEND (2 DAY)
WEEKDAY (5 DAY)
Start
Time
Start
Time
Start
Time
Start
Time
Period
Temperature
Temperature
Period
Temperature
Temperature
1ST HEAT
1ST HEAT
5:30 AM
68°F
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
2ND HEAT
3RD HEAT
4TH HEAT
1ST COOL
2ND COOL
3RD COOL
4TH COOL
2ND HEAT 8:00 AM
3RD HEAT 5:00 PM
4TH HEAT 10:30 PM
1ST COOL 6:30 AM
2ND COOL 2:00 PM
3RD COOL 5:00 PM
4TH COOL 10:30 PM
65°F
70°F
65°F
76°F
78°F
72°F
78°F
70°F
70°F
65°F
76°F
74°F
72°F
78°F
6
MO TU WE TH FR
CHECK YOUR PROGRAMMING
EXAMPLE:
Follow these steps to check your thermostat programming one
final time before beginning thermostat operation.
This display window shows that for the 1st weekday period,
the start time is 6:00 AM, and 70° is the programmed
temperature(thisexamplereflectsfactorypreprogramming).
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).
4. Press
or
to change the displayed temperature to your
selected temperature for the 1st heating program period.
5. Press SET TIME once (the programmed time will flash).
Press
or
untilyourselectedtimeisdisplayed. Thetime
3. Press RUN PRGM.
will change in 15 minute increments. When your selected
time is displayed, press SET TIME again to return to the
change temperature mode.
4. Press SYSTEM button until COOL is displayed.
5. Repeat step 2 to check cooling temperatures.
6. Press RUN PRGM to begin program operation.
6. Press VIEW PRGM once. The currently programmed start
time and setpoint temperature for the 2nd heating program
period will be displayed.
7. Press SYSTEM button to select HEAT, COOL, or AUTO
mode.
7. Repeat steps 4 and 5 to select the start time and heating
temperature for the 2nd heating program period.
YOUR THERMOSTAT IS NOW COMPLETELY PRO-
GRAMMED AND READY TO AUTOMATICALLY PROVIDE
MAXIMUM COMFORT AND EFFICIENCY!
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.
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, page 2 for the location of the button). Pressing the RESET
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.
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
CAUTION
!
For optimum performance, we recommend replacing batteries
once a year with fresh “AA” Energizer® alkaline batteries.
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.
7
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