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WHITE-RODGERS
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.
Your new White-Rodgers 5-Day/2-Day Digital Multi-stage 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.
Features:
• Separate 5-day (weekday) and 2-day (weekend) programming
with four separate time/temperature periods per program
• Simultaneous heat and cool program storage
• Optional C terminal (dual power option)
1F81-51
Programmable Electronic
Digital Multi-stage Thermostat
INSTALLATION AND
OPERATION INSTRUCTIONS
DESCRIPTION
• Preprogrammed temperature control
• LCD continuously displays set point, and alternately displays 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
This thermostat is intended for use with a 24-volt system; do not
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.
Do not exceed the specification ratings.
All wiring must conform to local and national electrical codes and
ordinances.
This control is a precision instrument, and should be handled
carefully. Rough handling or distorting components could cause
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)
1.5 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
PRECAUTIONS
CAUTION
!
To prevent electrical shock and/or equipment damage
disconnect electric power to system at main fuse or
circuit breaker box until installation is complete.
WARNING
!
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.
SPECIFICATIONS
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
WHITE-RODGERS DIVISION
EMERSON ELECTRIC CO.
9797 REAVIS ROAD
ST. LOUIS, MISSOURI 63123-5398
Printed in U.S.A.
PART NO. 37-5854E
Replaces 37-5854D
0004
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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
thermostat has a wall mounting plate, remove the thermostat
and the wall mounting plate as an assembly.
3. Identify each wire attached to the old thermostat using the
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.
GAS ELECTRIC
W901
CUT FOR
LONGER CYCLES
W903
CUT TO
DEFEAT EMR
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 air system with up
to 2 stages of heat and 2 stages of cool. It is configured
correctly for any system that DOES NOT require the thermostat 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
immediately on a call for heat. If you are unsure if the heating/
cooling system requires the thermostat to control the fan,
contact a qualified heating and air conditioning service
person.
3. Two jumpers are also located on the back of the 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 W901 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 W901.
Jumper wire W903 controls the Energy Management Recovery (EMR) feature. EMR allows the thermostat to energize
before
the heating system up to 30 minutes
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
overnight to 66°F and the room temperature is 66°. If the next
program is 7 AM, 70°F (an increase of 4°), the thermostat will
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 permanently disable the EMR feature.
If LOW BATTERY is displayed, the batteries are low and
should be replaced with fresh “AA” Energizer
batteries. To replace batteries, install the batteries along the
top of the base (see fig. 2). The batteries must be installed
with the positive (+) ends to the left.
2
the time pro-
®
alkaline
Figure 1. Back of thermostat base
Alkaline batteries (3 “AA”–
install “+” ends to the left)
Screw anchors
C
W2
Reset
button
Mounting
holes
G
W
Y2
R
Y
Figure 2. Thermostat base
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. Pull wires through the hole in the thermostat base and 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
two mounting screws. Place a level against the bottom of the
base, adjust until level, and then tighten the screws. (Leveling is for appearance only and will not affect thermostat
operation.) If you are using existing mounting holes, or if the
holes drilled are too large and do not allow you to tighten the
base snugly, use plastic screw anchors to secure the base.
6. Check that the SYSTEM switch is in the OFF position.
Connect the wires beneath the terminal screws on the base
using the appropriate wiring diagram (see figs. 3 through 5).
7. Push excess wire into wall and plug hole with a fire-resistant
material (such as fiberglass insulation) to prevent drafts from
affecting thermostat operation.
(Instructions continue on page 4.)
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NOTE NOTE
The following wiring diagrams show typical terminal identification and wiring. For proper installation, refer to the original
manufacturer's instructions.
Thermostat
Control
Circuit
Y2
Y W
Compressor
Contactor
Stage 2
Compressor
Contactor
Stage 1
Figure 3. Typical wiring diagram for single transformer systems
G
Fan
Relay
W2
Heat
Relay
Stage 1
Heat
Relay
Stage 2
C* R
Relay contacts shown are thermostatically operated.
* The 24 Volt neutral connection
to terminal C on the thermostat
is not required if you replace
THERMOSTAT
SYSTEM
Hot
24 VAC 120 VAC
Neutral
TRANSFORMER
Thermostat
Control
Circuit
the batteries once a year with
fresh “AA” Energizer
batteries.
* 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.
®
alkaline
CUT AND
TAPE OFF!
Hot
Neutral
TRANSFORMER
Y W
Compressor
24 VAC120 VAC
Compressor
BE JUMPERED TOGETHER!
Contactor
Contactor
Stage 1
TWO COMMONS MUST
Y2
Stage 2
G
Fan
Relay
Heat
Relay
Stage 1
W2
Heat
Relay
Stage 2
C* R
THERMOSTAT
SYSTEM
Hot
24 VAC 120 VAC
Neutral
TRANSFORMER
Figure 4. Typical wiring diagram for two-transformer systems with NO safety circuits
* 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
batteries.
24 VAC 120 VAC
HEATING
TRANSFORMER
Limit or
Safety
Switches
COOLING
TRANSFORMER
Limit or
Safety
Switches
Y2
Y W
Compressor
Contactor
Stage 2
Compressor
Contactor
Stage 1
TWO COMMONS MUST
BE JUMPERED TOGETHER!
G
Fan
Relay
Heat
Relay
Stage 1
W2
Heat
Relay
Stage 2
Thermostat
Control
Circuit
C* R
Common
THERMOSTAT
SYSTEM
Limit or
Safety
Switches
24 VAC
Accessory
Relay N.O.
Contact
Common
Limit or
Safety
Switches
24 VAC 120 VAC
Figure 5. Typical wiring diagram for two-transformer systems with safety circuits in BOTH systems
®
alkaline
Hot
Neutral
Hot
Neutral
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CHECK THERMOSTAT OPERATION
NOTE
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. Move SYSTEM switch to OFF position.
3. Move FAN switch to ON. The blower should begin to operate.
4. Move FAN switch to AUTO position. The blower should stop
within a short period of time.
Heating System
1. Move SYSTEM switch to HEAT position
2. Press to adjust thermostat setting to 90° and hold for five
seconds. Both stages of the heating system should begin to
operate within five seconds.
3. Press to adjust temperature setting below room temperature. The auxiliary heating system will stop immediately and
the first stage will stop within three to four minutes.
Cooling System
If the fan is running but the compressor is not running and the
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 to adjust temperature setting above room temperature. The cooling system should stop operating.
NOTE
During normal operation, the second stage of heat or cool may
take 15 to 30 minutes to turn on. The delay varies depending on
the performance of the first stage. Typically the second stage will
come on sooner in more severe weather, while in milder weather
it will take longer. There is no adjustment to this feature, as it is
designed to maximize both comfort and efficiency.
LOCKOUT BYPASS OPTION
FOR QUALIFIED SERVICE TECHNICIANS’ USE
ONLY. OPERATORS SHOULD NOT USE THIS FEATURE DUE TO POSSIBILITY OF EQUIPMENT OR
PROPERTY DAMAGE, OR PERSONAL INJURY.
COMPRESSOR SHORT TERM
CYCLE PROTECTION
CAUTION
!
To prevent compressor and/or property damage, if the
outdoor temperature is below 50°F, DO NOT operate
the cooling system.
1. Move SYSTEM switch to COOL position.
2. Press
seconds. 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 twostage cooling system).
to adjust thermostat setting to 45° and hold for five
During normal operation, this thermostat has a builtin short term (5-minute) time delay. During this 5minute period, the thermostat will lock out the compressor to allow head pressure to stabilize. If you want
to override this feature while testing thermostat opera-
tion, simply press and buttons at the same time.
DO NOT USE THE LOCKOUT BYPASS OPTION
UNLESS THE COMPRESSOR OIL HEATERS HAVE
BEEN OPERATIONAL FOR 6 HOURS AND THE
SYSTEM HAS NOT BEEN OPERATIONAL FOR AT
LEAST 5 MINUTES.
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Before you begin programming your thermostat, you should be
Figure 6. Thermostat display, buttons, and switches
3
2
1
4 5 6 7 8
SU
HOLD
SA
COOL 1+2
AM
MO TU WE TH FR
HEAT 1+2
9 910
101112 13
11
COOL-OFF-HEAT
AUTO
SET TIME VIEW PRGM RUN PRGM HOLD TEMP FAN ON SYSTEM
familiar with its features and with the display and the location and
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.
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
(Red arrow) Raises temperature setting.
1
(Blue arrow) Lowers temperature setting.
2
SET TIME button.
3
VIEW PRGM (program) button.
4
RUN PRGM (program) button.
5
OPERATION
HOLD TEMPerature button.
6
FAN switch (ON, AUTO).
7
SYSTEM switch (COOL, OFF, HEAT).
8
The Display
Indicates day of the week.
9
HEAT is displayed when the SYSTEM switch is in the HEAT
10
position. COOL is displayed when the SYSTEM switch is in
the COOL position. COOL is displayed (flashing) when the
compressor is in lockout mode.
Alternately displays current time and room temperature.
11
Displays currently programmed set temperature (this is
12
blank when SYSTEM switch is in the OFF position).
The word HOLD is displayed when the thermostat is in the
13
HOLD mode.
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 — When programming, you can enter both your
heating and cooling programs at the same time. There is no
need to reprogram the thermostat at the beginning of each
season.
• 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 automatically revert to the program.
• HOLD TEMPERATURE — The thermostat can hold any
temperature within its range for an indefinite period, without
reverting to the programmed temperature. Press HOLD
TEMP button. HOLD will be displayed. Then choose the
desired hold temperature by pressing or . The thermostat 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
TEMP buttons until the temperature display is in Celsius
(°C). To display Fahrenheit (°F), repeat the process.
• TEMPERATURE DISPLAY ADJUSTMENT — Your new
thermostat has been accurately set in our factory. However,
if you wish, you may adjust your new thermostat temperature 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. Press RUN PRGM to resume normal program opera-
tion.
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 guidelines in mind when planning your program.
• When heating (cooling) your building, program 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.
(Instructions continue on page 6.)
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Look at the factory preprogrammed times and temperatures
AM
MO TU WE TH FR
shown below. If this program will suit your needs, simply press the
RUN PRGM button to begin running the factory preset program.
3. Press SET TIME once. The display window will show the
minutes only.
Heating Program for
ALL days of the Week:
PERIOD TIME TEMP PERIOD TIME
1st
2nd
3rd
4th
FACTORY PREPROGRAMMING
6:00 AM
8:00 AM
5:00 PM
10:00 PM
70°F
62°F
70°F
62°F
Cooling Program for
ALL Days of the Week:
1st
6:00 AM
2nd
8:00 AM
3rd
5:00 PM
4th
10:00 PM
TEMP
78°F
85°F
78°F
82°F
If you want to change the preprogrammed times and temperatures, follow these steps.
Determine the time periods and heating and cooling temperatures for your weekday and weekend programs. You must
program four periods for both the weekday and weekend program. 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).
Use the table at the bottom of the page to plan your program time
periods, and the temperatures you want during each period. You
may also want to look at the sample program table to get an idea
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. Press SET TIME button once. The display will show the hour
only.
EXAMPLE:
2. Press and hold either or until you reach the correct
hour and AM/PM designation (AM begins at midnight; PM
begins at noon).
PM
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. 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. Move the SYSTEM switch to HEAT.
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).
EXAMPLE:
This display window shows that for the 1st weekday period,
the start time is 6:00 AM, and 70° is the programmed
temperature (this example reflects factory preprogramming).
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 until your selected time is displayed. The time
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.
Heating/Cooling Schedule Plan
WEEKDAY (5 DAY)
Period
Start
Time Temperature
1ST HEAT
2ND HEAT
3RD HEAT
4TH HEAT
1ST COOL
2ND COOL
3RD COOL
4TH COOL
6
WEEKEND (2 DAY)
Start
Time Temperature
Period
1ST HEAT
2ND HEAT
3RD HEAT
4TH HEAT
1ST COOL
2ND COOL
3RD COOL
4TH COOL
Heating/Cooling Schedule Plan
WEEKDAY (5 DAY)
Start
Time Temperature
5:30 AM
8:00 AM
5:00 PM
10:30 PM
6:30 AM
2:00 PM
5:00 PM
10:30 PM
70°F
65°F
70°F
65°F
76°F
78°F
72°F
78°F
WEEKEND (2 DAY)
Start
Time Temperature
7:00 AM
11:00 AM
6:00 PM
11:30 PM
7:00 AM
12:30 PM
6:00 PM
11:30 PM
70°F
70°F
70°F
65°F
76°F
74°F
72°F
78°F
SAMPLE
Page 7
7. Repeat steps 4 and 5 to select the start time and heating
temperature for the 2nd heating program period.
8. Repeat steps 4 through 6 for the 3rd and 4th heating program
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 temperature.
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
!
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. Move SYSTEM switch to COOL position.
2. Follow the procedure for entering your heating program,
using your selected cooling times and temperatures.
CHECK YOUR PROGRAMMING
Follow these steps to check your thermostat programming one
final time before beginning thermostat operation.
1. Move SYSTEM switch to HEAT position.
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 displayed in sequence for weekday, then weekend program
periods (you may change any time or temperature during this
procedure).
3. Press RUN PRGM.
4. Move SYSTEM switch to COOL position.
5. Repeat step 2 to check cooling temperatures.
6. Press RUN PRGM to begin program operation.
YOUR THERMOSTAT IS NOW COMPLETELY PROGRAMMED AND READY TO AUTOMATICALLY PROVIDE
MAXIMUM COMFORT AND EFFICIENCY!
TROUBLESHOOTING
If your thermostat’s display is frozen, blank or displaying incorrectly, the thermostat may have been affected by static discharge or voltage variations. If this happens, press the RESET
button (see fig. 2, page 2 for the location of the button). Pressing
the RESET button will clear all user programming. The thermostat will revert 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.
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