White Rodgers 1F80-51 User Manual

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 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:

• Battery powered (3 “AA” Energizer® alkaline batteries in­cluded).

• Separate 5-day (weekday) and 2-day (weekend) programming

• Simultaneous heat and cool program storage

• Preprogrammed temperature control

• Four separate time/temperature settings per 24-hour period

1F80-51

Programmable Electronic Digital Thermostat

INSTALLATION AND

OPERATION INSTRUCTIONS

DESCRIPTION

• LCD continuously displays set point, and alternately dis­plays time and room temperature

• Temperature override until next program period

• Manual program override (HOLD temperature)

• User may select either 12- or 24-hour clock display

• °F/°C convertibility

• Temperature range 45° to 90°F

• Standard five terminals for single or two-transformer sys­tems

• B and O terminals for single stage heat pumps or damper
operation

This thermostat is intended for use with a low voltage system;
do not use this thermostat with a 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:

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)

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:

• 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

• Single-stage heat pump systems

• Millivolt systems

DO NOT USE WITH:

• Multi-stage systems

• Systems exceeding 30 VAC and 1.5 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. 37-5285E

Replaces 37-5285D

0004

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.

ELECTRIC HEAT OR SINGLE-STAGE

HEAT PUMP SYSTEMS

Read entire paragraph before setting electric heat switch. If you
are unsure of your application, contact a qualified serviceperson.

If you have a single-stage heat pump system, OR your system
uses central electric heat, where the blower is energized by a
separate circuit through the fan relay (meaning that the fan
turns on immediately on call for heat), then the switch on the
back of the thermostat base must be moved to the “ELECTRIC”
position (see fig 1). If the thermostat is energizing electric heat
sequencers, the switch MUST remain in the “GAS” position.

If you must move the switch to the “ELECTRIC” position (to the
left), use a small screwdriver or pencil.

ATTACH THERMOSTAT BASE TO WALL

1. Remove the packing material from the thermostat. Gently
pull the cover straight off the base. Forcing or prying on the
thermostat will cause damage to the unit. If necessary, move
the electric heat switch (see ELECTRIC HEAT SYSTEMS,
above).

2. Connect wires beneath terminal screws on base using
appropriate wiring schematic (see figs. 3 through 10).

3. Place base over hole in wall and mark mounting hole
locations on wall using base as a template.

4. Move base out of the way. Drill mounting holes.

5. Fasten base loosely to wall, as shown in fig. 2, using two
mounting screws. Place a level against bottom of base,
adjust until level, and then tighten screws. (Leveling is for
appearance only and will not affect thermostat operation.) If
you are using existing mounting holes, or if holes drilled are
too large and do not allow you to tighten base snugly, use
plastic screw anchors to secure subbase.

6. Push excess wire into wall and plug hole with a fire-resistant
material (such as fiberglass insulation) to prevent drafts from
affecting thermostat operation.

BATTERY LOCATION

This thermostat requires 3 “AA” alkaline batteries to operate.
Batteries are installed in the thermostat at the factory with a
battery tag to prevent power drainage. You must remove the

battery tag to engage the batteries and provide power to the
thermostat.

If the word BATTERY is displayed, the batteries are low and
should be replaced with fresh “AA” Energizer® alkaline batteries.
To replace the 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.

ELECTRIC GAS

Electric/Gas switch

Figure 1. Back of thermostat base

Alkaline batteries (3 "AA"–

install "+" ends to the left)

Screw anchors

RH

W

RC

G

Mounting

holes

B

O

Y

Figure 2. Thermostat base

HYDRONIC (HOT WATER OR STEAM)

HEATING SYSTEMS

This thermostat is set to operate properly if you have a forced­air heating system. If you have a hydronic heating system (a
system that heats with hot water or steam), you must set the
thermostat to operate properly with your system. While in the
HEAT mode, change the setting by pressing and holding SET
TIME and VIEW PRGM buttons at the same time until the correct
setting is displayed (A for forced air; H for hydronic systems). If
there is a loss of battery power, or when you change batteries,
you must repeat this operation once battery power is restored.

NOTE

If you do not press both buttons at the same time, A or H will not
be displayed. If this happens, press RUN PRGM, then press and
hold SET TIME and VIEW PRGM at the same time.

2

RH

Y

24 VAC

120 VAC

Hot

Neutral

THERMOSTAT

SYSTEM

G W

Figure 8. Typical wiring diagram for

heat/cool, 5-wire, two-transformer systems

HEATING TRANSFORMER

Heating
System

Fan

Relay

Cooling
System

RC

24 VAC

120 VAC

Hot

Neutral

COOLING TRANSFORMER

OB

Y

RH

Y

24 VAC

120 VAC

Hot

Neutral

THERMOSTAT

SYSTEM

G W

Figure 9. Typical wiring diagram for

heat pump with cool active reversing valve

TRANSFORMER

Reversing

Valve*

RCOB

JUMPER

WIRE

Compressor

Contactor

JUMPER

WIRE

* Reversing valve is energized when the
system switch is in the COOL position

Fan

Relay

G W

RCOB

THERMOSTAT

RH

SYSTEM

Heating
System

24 VAC Transformer

or

Thermopile

Figure 3. Typical wiring diagram for heating only,

2-wire, single transformer systems or millivolt systems

OB

NOTE

RED jumper wire (provided

with thermostat) must be
connected between thermo­stat's RH and RC terminals
for proper thermostat oper­ation with this system.

Figure 7. Typical wiring diagram for

heat/cool, 4-wire, single transformer systems

Y

Cooling
System

G W

Fan

Relay

Heating
System

JUMPER

WIRE

RC

24 VAC

THERMOSTAT

RH

SYSTEM

TRANSFORMER

Hot
120 VAC

Neutral

Thermostat

RW

NOTE

Jumper wire must be
added between R and B
terminals on the primary
control (jumper wire not
provided with thermostat).

(located at furnace)
B

W

R

Add jumper wire

(not provided with thermostat)

Figure 4. Typical wiring diagram for

3-wire SERIES 10 heating systems

JUMPER

Y

Y

OB

NOTE

RED jumper wire (provided

with thermostat) must be
connected between thermo­stat's RH and RC terminals
for proper thermostat oper­ation with this system.

G W

Fan

Relay

Heating
System

RC

Figure 5. Typical wiring diagram for

heat only, 3-wire, single transformer systems

Y

Cooling
System

G W

Fan

Relay

RH

RCOB

24 VAC

Figure 6. Typical wiring diagram for

cool only, 3-wire, single transformer systems

3-wire Series 10

Primary Control

Furnace

WIRE

TRANSFORMER

THERMOSTAT

RH

SYSTEM

24 VAC

TRANSFORMER

THERMOSTAT

SYSTEM

Hot
120 VAC

Neutral

Hot
120 VAC

Neutral

JUMPER

WIRE

Y

Reversing

Valve*

* Reversing valve is energized when the
system switch is in the HEAT position

Compressor

Contactor

G W

Fan

Relay

JUMPER

WIRE

RH

RCOB

24 VAC

THERMOSTAT

TRANSFORMER

Figure 10. Typical wiring diagram for

heat pump with heat active reversing valve

SYSTEM

Hot
120 VAC

Neutral

CHECK THERMOSTAT OPERATION

If at any time during testing your system does not operate
properly, contact a qualified serviceperson.

If your system does not have a G terminal connection, skip to
Heating System.

1. Turn on power to the system.

2. Move fan switch to ON position. The blower should begin to
operate.

Fan Operation

3. Move fan switch to AUTO position. The blower should stop
immediately.

Heating System

1. Move SYSTEM switch to HEAT position. If the heating
system has a standing pilot, be sure to light it.

2. Press
ture. The heating system should begin to operate.

3. Press to adjust temperature setting below room tempera­ture. The heating system should stop operating.

3

to adjust thermostat setting above room tempera-

Cooling System

Figure 11. Thermostat display, buttons, and switches

3

2

1

4 5 6 7 8

AUTOSET TIME VIEW PRGM RUN PRGM HOLD TEMP FAN ON COOL OFF HEAT

SU

HOLD

SA

COOL

BATTERY

AM

MO TU WE TH FR

HEAT

9 910

1012 1113 14

11

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

!

To prevent compressor and/or property damage, if the
outdoor temperature is below 50°F, DO NOT operate
the cooling system.

Before you begin programming your thermostat, you should be
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.

1. Move SYSTEM switch to COOL position.

2. Press

to adjust thermostat setting below room tempera-

ture. The blower should come on immediately on high speed,
followed by cold air circulation

3. Press

to adjust temperature setting above room tem-

perature. The cooling system should stop operating.

OPERATION

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. 11). Pull the door down to open it.

The Thermostat Buttons and Switches

1

(Red arrow) Raises temperature setting.
(Blue arrow) Lowers temperature setting.

2

3

SET TIME button.
VIEW PRGM (program) button.

4
5

RUN PRGM (program) button.

6

10

HOLD TEMPerature button.

7

FAN switch (ON, AUTO).
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
position. COOL is displayed (non-flashing) when the SYS-

TEM switch is in the COOL position. COOL is displayed
(flashing) when the compressor is in lockout mode.

Alternately displays current time and temperature.

11

BATTERY is displayed when the 3 “AA” batteries are low

12

and should be replaced. Nothing else will be displayed.

13

Displays currently programmed set temperature (this is
blank when SYSTEM switch is in the OFF position).

The word HOLD is displayed when the thermostat is in the

14

HOLD mode.

4

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
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
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 and hold SET TIME and
HOLD TEMP buttons until the temperature display is in
Celsius (°C). To display Fahrenheit (°F), repeat the pro-
cess.

• 12-HOUR/24-HOUR CLOCK DISPLAY — The clock is set
to display 12-hour time, which means that the clock will
display AM and PM time (12:00 AM is midnight; 12:00 PM is
noon). However, you may want to display a 24-hour clock
(military-style time). The 24-hour clock display will show 1:00
PM as 13:00, 2:00 PM as 14:00, and so on. To change to the
24-hour clock display, press and hold SET TIME and RUN
PRGM buttons at the same time. In the 24-hour clock mode,
AM and PM are not displayed.

• LOW BATTERY INDICATOR — If the 3 “AA” alkaline
batteries are low and should be replaced, the display will be
blank except for the word BATTERY. When the batteries are
low, pressing any button will cause the display to operate for
ten seconds. After ten seconds, the display will be blank
except for the word BATTERY. You cannot program with low
batteries, but you can override setpoint temperature.

or until the

or . The

• 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° 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 operation.

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.

• Program the thermostat to allow about 30 minutes to reach
the desired temperature. (For example, if the first person
gets up at 6:00 AM, program the first period to begin at
5:30 AM.)

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.

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

68°F
68°F
68°F
64°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

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
82°F
78°F
78°F

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

WEEKEND (2 DAY)

Start

Time* Temperature

5

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

SAMPLE

68°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

68°F
70°F
70°F
65°F
76°F
74°F
72°F
78°F

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.

NOTE

The thermostat should be programmed in the 12-hour format,
then switched to the 24-hour format, if desired (see OPERAT-

ING FEATURES for more information).

Set Current Time and Day

1. Press SET TIME button once. The display will show the hour
only.

EXAMPLE:

PM

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 appears. 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 appear.

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 appear in the display, 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

2. Press and hold either or until you reach the correct
hour and AM/PM designation (AM begins at midnight; PM

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. 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 appear in the display. Also displayed
are the currently programmed start time for the 1st heating
period and the currently programmed temperature (flash­ing).

MO TU WE TH FR

EXAMPLE:

AM

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!

This display window shows that for the 1st weekday period,
the start time is 6:00 AM, and 68° is the programmed
temperature (this example reflects factory preprogramming).