White Rodgers 1F83 51 Thermostat User Manual

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1F83-51

Non-Programmable Electronic

Digital Multi-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 Digital Multi-stage Thermostat uses

thetechnologyofasolid-statemicrocomputertoprovideprecise

temperature control.

• LCD continuously displays room temperature

• °F/°C convertibility

• Temperature range 45° to 90°F

• Two-stage heat/two-stage cool

Features:

• Simultaneous heat and cool program storage

• 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.

Allwiringmustconformtolocalandnationalelectricalcodesand

ordinances.

WARNING

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:

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)

• Heat/cool systems with up to two stages heat, two

stages cool

DO NOT USE WITH:

THERMAL DATA

• Millivolt systems

Setpoint Temperature Range:

45°F to 90°F (7°C to 32°C)

• Systems exceeding 30 VAC and 1.5 amps

• 3-wire zoned hydronic heating systems

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

WHITE-RODGERS DIVISION

EMERSON ELECTRIC CO.

9797 REAVIS ROAD

PART NO. 37-5916C

Printed in U.S.A.

Replaces 37-5916B

0005

ST. LOUIS, MISSOURI 63123-5398

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.

W901

CUT FOR

LONGER CYCLES

3. Identifyeachwireattachedtotheoldthermostatusingthe

labels enclosed with the new thermostat.

4. Disconnect the wires from old thermostat one at a time. DO

GAS ELECTRIC

NOT LET WIRES FALL BACK INTO THE WALL.

5. Install new thermostat using the following procedures.

PRE-INSTALLATION SET-UP

Figure 1. Back of thermostat base

1. Remove the packing material from the thermostat.

Alkaline batteries (3 “AA”–

install “+” ends to the left)

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 thermo-

stat to energize the fan on a call for heat.

Screw anchors

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.

Reset

button

3. Ajumperislocatedonthebackofthethermostat, sothatyou

may customize the thermostat to meet your individual pref-

erence (see fig. 1). In most applications, the factory jumper

setting provides the most comfortable and convenient ther-

mostat operation.

Mounting

holes

Figure 2. Thermostat base

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.

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. 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.

BATTERY LOCATION

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

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. After batteries are engaged, thermostat display and

features may be viewed before installing thermostat.

4. 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. (Level-

ing 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.

If LOW BATTERYis displayed, the batteries are low and should

be replaced with fresh “AA” Energizer^®alkaline 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.

5. 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).

6. Push excess wire into wall and plug hole with a fire-resistant

material(suchasfiberglassinsulation)topreventdraftsfrom

affecting thermostat operation.

(Instructions continue on page 4.)

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

Circuit

batteries.

THERMOSTAT

SYSTEM

Heat

Relay

Compressor

Contactor

Stage 2

Stage 1

Hot

24 VAC

120 VAC

Neutral

Compressor

Contactor

Stage 1

Heat

Relay

Fan

Relay

TRANSFORMER

Stage 2

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!

Hot

Heat

Relay

Compressor

Contactor

Stage 2

120 VAC

24 VAC

Stage 1

Hot

Neutral

24 VAC

120 VAC

TRANSFORMER

Compressor

Contactor

Stage 1

Heat

Relay

Neutral

TRANSFORMER

Fan

Relay

Stage 2

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.

Heat

Relay

Compressor

Contactor

Stage 2

Limit or

Safety

Switches

Stage 1

Limit or

Safety

Switches

Hot

24 VAC

120 VAC

Neutral

Compressor

Contactor

Stage 1

Heat

Relay

Fan

24 VAC

Accessory

Relay N.O.

Contact

HEATING

TRANSFORMER

Relay

Stage 2

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

If the fan is running but the compressor is not running and

the display has CLflashing, the compressor lockout feature

is operating (see Lockout Bypass Option to temporarily

override the compressor lockout feature during testing).

CHECK THERMOSTAT OPERATION

NOTE

If at any time during testing, your system does not operate

properly, contact a qualified serviceperson.

3. Press

toadjusttemperaturesettingaboveroomtempera-

ture. The cooling system should stop operating.

Fan Operation

1. Turn on power to the system.

LOCKOUT BYPASS OPTION

2. Move SYSTEM switch to OFF position.

3. MoveFANswitchtoON.Theblowershouldbegintooperate.

FOR QUALIFIED SERVICE TECHNICIANS’ USE

ONLY.OPERATORSSHOULDNOTUSETHISFEA-

TURE DUE TO POSSIBILITY OF EQUIPMENT OR

PROPERTY DAMAGE, OR PERSONAL INJURY.

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

COMPRESSOR SHORT TERM

CYCLE PROTECTION

2. Press

toadjustthermostatsettingto90° andholdforfive

seconds. Both stages of the heating system should begin to

operate within five seconds.

During normal operation, this thermostat has a built-in

short term (5-minute) time delay. During this 5-minute

period, the thermostat will lock out the compressor to

allow head pressure to stabilize. If you want to over-

ride this feature while testing thermostat operation,

3. Press

toadjusttemperaturesettingbelowroomtempera-

ture. The auxiliary heating system will stop immediately and

the first stage will stop within three to four minutes.

simply press

and

buttons at the same time with

Cooling System

the SYSTEM switch in the OFF position.

CAUTION

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.

Topreventcompressorand/orpropertydamage, ifthe

outdoor temperature is below 50°F, DO NOT operate

the cooling system.

1. Move SYSTEM switch to COOL position.

2. Press

toadjustthermostatsettingto45° andholdforfive

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 two-

stage cooling system).

OPERATION

Before you begin using 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.

THE THERMOSTAT BASE

FAN ON

AUTO

SYSTEM

Other than

and

, the following buttons and switches are

COOL-OFF-HEAT

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.

(Blue arrow) Lowers temperature setting.

FAN switch (ON, AUTO).

HEAT 1+2

OFF

COOL 1+2

LOW BATTERY

SYSTEM switch (COOL, OFF, HEAT).

The Display

Figure 6. Thermostat display, buttons, and switches

HT is displayed when the SYSTEM switch is in the HEAT

position. When calling for the first stage of heat, HT1 will

display. When calling for the second stage of heat, HT1+2

will display. CL is displayed (non-flashing) when the SYS-

TEM switch is in the COOL position. When calling for the

first stage of cool, CL1 will display. When calling for the

second stage of cool, CL1+2 will display. CL is displayed

(flashing) when the compressor is in lockout mode.

• °F/°C CONVERTIBILITY— When the thermostat is in the

temperature display adjustment mode, or 30 seconds after

power up, pressing

and

at the same time will switch

the LCD temperature display between Fahrenheit and

Celsius.

• 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:

Displays current temperature.

LOW BATTERY is displayed when the 3 "AA" batteries are

low and should be replaced. Nothing else will be displayed.

Displays current setpoint temperature. This is blank when

SYSTEM switch is in the OFF position.

1. Move the SYSTEM switch to OFF position.

2. Press and hold

and move the SYSTEM switch to

HEAT or COOL. Release

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.

3. Press

to adjust the displayed temperature to

your desired setting. After setting your desired tempera-

ture, do not press any buttons for ten seconds. The

thermostat will continue operating at the changed tem-

perature setting.

• TEMPERATURE SETPOINT — Press

until the

display shows the temperature you want.

4. Pressing the hardware RESET button (see Fig. 2) will

return the offset to zero.

• SIMULTANEOUSHEATING/COOLINGSTORAGE—You

can enter both your heating and cooling setpoints at the

same time. There is no need to reset the thermostat at the

beginning of each season.

• LOW BATTERY INDICATOR — If the 3 “AA” alkaline

batteries are low and should be replaced, the display will be

blank except for the word LOW BATTERY. When the

batteries are low, pressing any button will cause the display

to operate for ten seconds. After ten seconds, the display

willbeblankexceptforthewordLOWBATTERY.Whenthe

duration of a low battery condition exceeds four weeks, the

setpoint is altered by 10 degrees to signal that the batteries

must be replaced.

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). 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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