White Rodgers 1F92W 51 Thermostat User Manual

About Your New Thermostat . . .

Your new White-Rodgers Digital Multi-stage/Heat Pump 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.

Please read this manual thoroughly before operating or programming your thermostat. If you have

questions, contact us at the address shown on the back cover of this manual.

In This Guide . . .

YOUR NEW THERMOSTAT’S

OPERATING YOUR THERMOSTAT ............... 22

PARTS OF THE THERMOSTAT

The Back Of the Thermostat Body

The Display

FEATURES .................................................. 4

PRECAUTIONS ................................................. 5

THE THERMOSTAT’S SPECIFICATIONS ....... 6

INSTALLING YOUR THERMOSTAT ................ 7

NEW INSTALLATION

The Thermostat Buttons

OPERATING FEATURES

Select Thermostat Location

PROGRAMMING YOUR

Route Wires to Location

REPLACEMENT INSTALLATION

Remove Old Thermostat

THERMOSTAT........................................... 34

PLANNING FOR YOUR NEEDS

ENTERING YOUR PROGRAM

Set Current Time and Day

Attach Subbase to Wall

SYSTEM CONFIGURATON

Enter Heating Program

Set Option Switches

Enter Cooling Program

CHECK THERMOSTAT OPERATION

Fan Operation

CHECK YOUR PROGRAMMING

QUESTIONS AND ANSWERS ........................ 44

Heating System Operation

Cooling System Operation

LOCKOUT BYPASS OPTION

Compressor Long Term Cycle Protection

Compressor Short Term Cycle Protection

YOUR NEW THERMOSTAT’S FEATURES

• Five-day/two-day programming capability

• Adjustable cycle times

• Simultaneous heat and cool program storage

• 9 volt Energizer^®alkaline battery backup

• Compressor long term cycle protection

• Compressor short cycle protection

• Blower delay in the cooling cycle

• Preprogrammed temperature control

• Visual prompting during operation

• Programmable blower control

• Temperature range 40° to 99°F

• °F/°C convertibility

• Four separate time and temperature settings

per 24-hour period

• Up to 2 stages of heat and up to 1 stage of cool

• Computed Energy Management Recovery

(EMR)

• Automatic changeover (operator selectable)

• Two hour temperature override

• Manual program override (HOLD temperature)

• “Advance Program” button

• Electric Heat (installer-selectable)

• Armchair programming capability

• LCD displays continuous setpoint, time, and

room temperature

PRECAUTIONS

If in doubt about whether your wiring is millivolt, line,

WARNING

or low voltage, have it inspected by a qualified

heating and air conditioning contractor, electrician,

or someone familiar with basic electricity and wiring.

Do not use on circuits exceeding specified

voltage. Higher voltage will damage control

and could cause shock or fire hazard.

Do not exceed the specification ratings.

Do not short out terminals on gas valve or

primary control to test. Short or incorrect

wiring will burn out thermostat and could

cause personal injury and/or property

damage.

All wiring must conform to local and national electri-

cal codes and ordinances.

This control is a precision instrument, and should be

handledcarefully.Roughhandlingordistortingcom-

ponents could cause the control to malfunction.

CAUTION

To prevent electrical shock and/or equip-

ment damage, disconnect electric power to

system, at main fuse or circuit breaker box,

until installation is complete.

THE THERMOSTAT’S SPECIFICATIONS

THIS CONTROL IS DESIGNED FOR USE WHERE BOTH SIDES OF THE TRANSFORMER ARE

PRESENT AT THE THERMOSTAT (both the hot and common sides of the 24 VAC end of the

transformer.)

ELECTRICAL DATA

Electrical Rating:

THERMAL DATA

Setpoint Temperature Range:

40°F to 99°F (4°C to 37°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

20 to 30 VAC 50/60 Hz.

0.01 to 1.5 Amps (Load per terminal)

2.5 Amps Maximum Total Load (All terminals

combined)

Anticipation:

Heating 4 to 40

Cooling 4 to 40

Auxiliary 4 to 40

ACCESSORIES

STAGING DATA

Thermostat Guard:

Up to 3 heating stages

Up to 1 cooling stage

W. R. Part No. F29-0198 (clear)

or F29-0238 (opaque)

INSTALLING YOUR THERMOSTAT

4. Avoid locations close to windows, adjoining out-

NEW INSTALLATION

side walls, or doors that lead outside.

WE RECOMMEND THAT YOU PROGRAM THE

THERMOSTAT WITH BATTERY INSTALLED BE-

FORE ATTACHING ON SUBBASE. SEE OPERA-

TION SECTION FOR PROGRAMMING INSTRUC-

TIONS.

5. Avoid locations close to air registers or in the

direct path of air from them.

6. Make sure there are no pipes or duct work in that

part of the wall chosen for the thermostat loca-

tion.

SELECT THERMOSTAT LOCATION

7. Never locate thermostat in a room that normally

warmer or cooler than the rest of the building.

Proper location insures that the thermostat will

provide a comfortable building temperature. Ob-

serve the following general rules when selecting

a location:

8. Avoid locations with poor air circulation, such as

behind doors or in alcoves.

ROUTE WIRES TO LOCATION

1. Locate thermostat about 5 ft. above the floor.

2. Installthermostatonapartitioningwall, notonan

outside wall.

NOTE

All wiring must conform with local and national

electrical codes and ordinances.

3. Never expose thermostat to direct light from

lamps, sun, fireplacesoranytemperatureradiat-

ing equipment.

1. Probe for obstructions in partition before drilling

⁄ ” hole for

⁄2

” hole in wall at selected location. Take up

quarter round and drill a small guide hole for

sighting(seefig. 1). Frombasement, drill³⁄

”hole

in partition floor next to guide hole. In buildings

without basements, drill ¹⁄

” hole through ceiling

thermostat wire

Stout cord with 6”

chain attached

Approximately

5 feet from floor

Baseboard

strip moulding

⁄ ” guide hole

and into partition from above (see fig. 1).

for sighting

Quarter round

removed

2. Through this hole drop a light chain, or 6” chain

attachedtoastrongcord.Snagcordinbasement

with hooked wire. In buildings without base-

ments, drop cord through hole in ceiling and

down partitioning; snag cord at the thermostat

location.

⁄ ” hole in floor of partition

Hooked wire for snagging chain

3. Attach thermostat wires to cord and pull wires

through hole in wall so that 6” of wire comes out

of the wall.

Figure 1. Routing thermostat wires

REPLACEMENT INSTALLATION

REMOVE OLD THERMOSTAT

TABLE 1. WIRE IDENTIFICATION LABELS

1. Shutoffelectricityatthemainfuseboxuntil

installation is complete. Verify power is off

with a voltmeter.

2. Remove the front cover of the old thermo-

stat. With wires still attached, remove

wall plate from the wall.

3. If the old thermostat has a wall mounting

plate, remove the thermostat and the wall

mounting plate as an assembly.

4. Use the Cross Reference Guide to find the

thermostat type you are replacing.

6. Disconnect the wires from old thermostat one at

a time. Pull at least 6 inches of wire out of the

wall. DO NOT LET WIRES FALL BACK INTO

THE WALL.

5. Identify each wire attached to the old thermo-

stat using the labels enclosed with the new

thermostat (see Table 1). Record the identifi-

cationofthewireonthecorrespondingblank

in Table 2.

7. Install new thermostat using the following proce-

dures.

TABLE 2. TERMINAL REFERENCE

FUNCTION

NEW THERMOSTAT

TERMINAL

OLD THERMOSTAT

TERMINAL

LABEL

NUMBER

DESIGNATION

(1)

(2)

(3)

(4)

(5)

(6)

(7)

Fan Output

Transformer 24 VAC Common

(this terminal not used)

Transformer 24 VAC Hot

Changeover Output (Cooling)

Changeover Output (Heating)

Emergency Heat Relay (cycles on

1st stage in Emergency Mode)

Emergency Heat Relay (continually

energized in Emergency Mode)

Stage 1 Cool

(8)

(9)

(10)

(11)

(12)

(13)

(this terminal not used)

Stage 1 Heat (Compressor)

Stage 2 Heat (Auxiliary)

(this terminal not used)

ATTACH SUBBASE TO WALL

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 subbase snugly, use plastic expansion

plugs to secure subbase.

1. Remove the packing material from the thermo-

stat. Place the fingers of one hand on the center

top and bottom portion of the thermostat. Grasp

the subbase in the other hand on the top and

bottom center, and gently pull straight out (see

fig. 2). The thermostat has pin and socket con-

nectors. Forcing or prying on the thermostat will

cause damage to the unit.

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

fire-resistant material (such as fiberglass insula-

tion) to prevent drafts from affecting thermostat

operation.

2. Connect wires beneath terminal screws on sub-

base using wiring schematic for your particular

application (see figs. 3 through 6).

(Instructions continue on page 16).

3. Place subbase over hole in wall and mark

mounting hole locations on wall using subbase

as a template.

4. Move subbase out of the way. Drill mounting

holes.

5. Fasten subbase loosely to wall, as shown in fig.

3, using two mounting screws. Place a level

againstbottomofsubbase, adjustuntillevel, and

WARNING

CAUTION

DO NOT EXCEED MAXIMUM VOLTAGE OR

CURRENT RATINGS. FIRE, PERSONAL IN-

JURY, AND/OR EQUIPMENT DAMAGE

COULD RESULT.

To prevent electrical shock and/or equip-

ment damage, disconnect electrical power

at the main fuse box until installation is

complete. Verify power is off with a volt-

meter.

Expansion

plugs

Connect wires under

terminal screws

S1 S2

Mounting

hole

4-pin connector

Mounting

hole

9-pin connector

Pull wires through

this opening

Figure 3. Subbase

NOTE

The following wiring diagrams show typical terminal iden-

tification and wiring. For proper installation, refer to the

original manufacturers' instructions.

Thermostat

Control

Circuit

THERMOSTAT

SYSTEM

Emergency

Relay

Switched

Output

Changeover

Energized

In Heat

Heat

Relay

Fan

Relay

Stage 2

Hot

24 VAC

120 VAC

Emergency

Relay

Constant

Output

Heat

Relay

Changeover

Energized

In Cool

Compressor

Contactor

Stage 1

Neutral

TRANSFORMER

Stage 1

Figure 4. Typical wiring diagram for single transformer systems

NOTE

IF SAFETY CIRCUITS ARE IN ONLY ONE OF THE

SYSTEMS, REMOVE THE TRANSFORMER OF THE

SYSTEM WITH NO SAFETY CIRCUITS.

Thermostat

Control

Circuit

THERMOSTAT

SYSTEM

CUT AND

TAPE OFF!

Emergency

Relay

Switched

Output

Changeover

Energized

In Heat

Heat

Relay

Limit or

Safety

Fan

Hot

Relay

Stage 2

Switches

120 VAC

24 VAC

Limit or

Safety

TRANSFORMER

Emergency

Relay

Constant

Output

Changeover Compressor

Heat

Relay

Neutral

TRANSFORMER

Hot

Energized

In Cool

Contactor

Stage 1

Switches

Stage 1

120 VAC

24 VAC

Neutral

HEAT PUMP SYSTEM

AUXILIARY HEATING SYSTEM

DEPENDING ON SYSTEM REQUIRE-

MENTS, REPLACE WITH A

75VA TRANSFORMER, IF NEEDED

TWO COMMONS MUST

BE JUMPERED TOGETHER!

Figure 5. Typical wiring diagram for two transformer systems with NO safety circuits

CAUTION

NOTE

Relay contacts shown are thermostatically operated. The

accessory relay scheme is required when safety circuits

exist in both systems.

Polarity must be observed. If the HOT

side of the second transformer is

jumpered to the COMMON side of the

first transformer a short will be made.

Damage to equipment will occur when

power is restored.

Thermostat

Control

Circuit

THERMOSTAT

SYSTEM

Emergency

Relay

Switched

Output

Changeover

Energized

In Heat

Limit or

Safety

Limit or

Safety

Heat

Fan

Relay

Hot

Relay

Switches

Stage 2

24 VAC

120 VAC

Neutral

Emergency

Relay

Constant

Output

Changeover Compressor

Heat

Relay

24 VAC

Energized

In Cool

Contactor

Stage 1

Accessory

Relay N.O.

Contact

AUXILIARY

HEATING

Stage 1

TRANSFORMER

HEAT PUMP SYSTEM

AUXILIARY

HEATING SYSTEM

HEAT PUMP

Limit or

Safety

Limit or

Safety

TRANSFORMER

Hot

TWO COMMONS MUST

BE JUMPERED TOGETHER!

Switches

24 VAC

120 VAC

Neutral

Figure 6. Typical wiring diagram for two transformer systems with safety circuits in BOTH systems

ATTACH THERMOSTAT TO SUBBASE

snaps lock into place (see fig. 7). Be gentle when

attaching thermostat. If the thermostat does not

seem to be attaching to the subbase easily, make

sure that the connector pins and plastic snaps are

properlyaligned, andthatexcesswireispushedinto

the wall. Damage to the thermostat may occur if

force is used.

WE RECOMMEND THAT YOU SET OPTION

SWITCHESTODESIREDPOSITIONBEFOREAT-

TACHING ON SUBBASE (see OPERATION). WE

ALSORECOMMEND THATYOUPROGRAMTHE

THERMOSTAT WITH BATTERY INSTALLED BE-

FORE ATTACHING ON SUBBASE (see OPERA-

TION section for programming instructions).

SYSTEM

HEAT-OFF-COOL-AUTO

USE

TO TURN THERMOSTAT OFF BE-

FOREATTACHINGTOWALL.FAILURETOTURN

OFF THERMOSTAT BEFORE ATTACHING TO

WALL MAY CAUSE EQUIPMENT DAMAGE DUE

TO RAPID COMPRESSOR CYCLING.

To attach thermostat to subbase, line up the plastic

snap guides at the top of the thermostat and the 4

connector pins on the thermostat with the connec-

tors near the top right section of the subbase (when

viewed from the front). Gently pivot the thermostat

down until the 9-pin connectors and the plastic

ENGAGE TWO UPPER GUIDES; PIVOT DOWN

Figure 7. Attaching thermostat to subbase

SET OPTION SWITCHES

SYSTEM CONFIGURATION

1. Single Stage Compressor Heat Pump — with

reversing valve energized through B or O termi-

nals

NOTE

ANY TIME AN OPTION SWITCH IS CHANGED,

THE 9 VOLT ENERGIZER^®BATTERY MUST BE

REMOVED FOR A MINIMUM OF 2 MINUTES.

Field jumper W1 & Y1

Battery

4-pin connector

Switch #1 OFF

Switch #2 OFF

Switch #3 OFF

Switch #4 (see step 6)

2. Two Compressor (Split) System

Field jumper W1 & Y1

Switch #1 OFF

Switch #2 ON

W18

Switch #3 OFF

Switch #4 (see step 6)

Option switches

9-pin connector

Figure 8. Back of thermostat

3. Multi-stage (Fossil Fuel) System — up to 2 5. Automatic Changeover from Heat to Cool

heat stages and 1 cool stage

Switch #1 (see steps 1-4)

Switch #1 ON

Switch #2 (see steps 1-4)

Switch #3 (see step 5)

Switch #4 ON

Switch #2 OFF

Switch #3 OFF

Switch #4 (see step 6)

NOTE

4. Multi-stage (Electric Heat) System — up to 2

heat stages and 1 cool stage

The battery maintains the stored program in the

event of a power failure. When attached to the wall

with 24 VAC power applied, the thermostat will

function normally without the battery. However, the

programwillbelostintheeventofpowerinterruption

or failure if the battery is not installed. When power

is restored, the thermostat will automatically main-

tain a temperature of 64°F or a cooling temperature

of 82°F (factory preprogrammed) as needed.

Switch #1 ON

Switch #2 ON

Switch #3 (see step 5)

Switch #4 (see step 6)

HEATING SYSTEM OPERATION

CHECK THERMOSTAT OPERATION

When checking thermostat, option switch #4 for

automatic changeover must be in the OFF position.

This will allow temporary setting of heat set points

above cool settings. After system checkout, reset

optionswitchtoONpositionifautomaticchangeover

is desired (see SET OPTION SWITCHES).

SYSTEM

HEAT-OFF-COOL-AUTO

1. Press

untilHEATisdisplayed.(Itshould

already be displayed.)

2. Press

to adjust thermostat to 99°F. All

stages of the heating system should come on

within approximately five minutes. However, if

the PUMP LED is flashing, the compressor lock-

out feature is operating (see Lockout Bypass

Option to temporarily override the compressor

lockout feature during testing).

FAN OPERATION

1. Turn on power to the system. If the auxiliary heat

source has a standing pilot, be sure to light it.

FAN

– AUTO

2. Press

until FAN

is displayed. The

SYSTEM

HEAT-OFF-COOL-AUTO

3. Press

until EMER is displayed. Repeat

NOTE

step 2.

4. To program the thermostat, see PROGRAM-

MING YOUR THERMOSTAT.

blower should begin to operate.

FAN

3. Press

until FAN

is displayed. The

– AUTO

blower should stop operating within approxi-

mately one minute.

COOLING SYSTEM OPERATION

CAUTION

pass Option to temporarily override the com-

pressor lockout feature during testing).

3. To program the thermostat, see PROGRAM-

MING YOUR THERMOSTAT.

To prevent compressor and/or property

damage, if power to the compressor has

been off or interrupted for more than 1

hour and the outdoor temperature is be-

low 50°F, DO NOT operate the system for

at least the amount of time the compres-

sor was off! This will allow the compres-

sor heaters to warm the compressor oils

to avoid damage due to slugging.

Afterheatingandcoolingsystemhavebeenchecked

and are running properly, determine if automatic

changeover is desired. When option switch #4 is in

the proper position, automatic changeover is en-

SYSTEM

HEAT-OFF-COOL-AUTO

abled by pressing

until AUTO is displayed

(seeSETOPTIONSWITCHES).IntheAUTOmode,

the setpoint temperature is not displayed.

SYSTEM

HEAT-OFF-COOL-AUTO

1. Press

until COOL is displayed.

2. Press

to adjust thermostat to 40°F. The

cooling system should come on within approxi-

mately five minutes. However, if the fan is run-

ning but the compressor is not, the compressor

lockout feature is operating (see Lockout By-

than the power loss to the unit (up to 12 hours

maximum lockout). During this time, auxiliary heat

will be used when necessary to maintain setpoint

temperature. DO NOT attempt to override this delay

feature before crankcase temperature has stabi-

lized (for example, if power has been out for three

hours, the compressor should remain locked out for

two hours).

LOCKOUT BYPASS OPTION

CAUTION

FOR QUALIFIED SERVICE TECHNICIANS’

USEONLY.OPERATORSSHOULDNOTUSE

THIS FEATURE DUE TO POSSIBILITY OF

EQUIPMENT OR PROPERTY DAMAGE, OR

PERSONAL INJURY.

COMPRESSOR SHORT TERM CYCLE

PROTECTION

DO NOT USE THE LOCKOUT BYPASS OP-

TION UNLESS THE COMPRESSOR OIL

HEATERSHAVEBEENOPERATIONALFOR

6HOURSANDTHESYSTEMHASNOTBEEN

OPERATIONAL FOR AT LEAST 5 MINUTES.

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

pressure to stabilize. If you want to override this

feature while testing thermostat operation, simply

COMPRESSOR LONG TERM CYCLE

PROTECTION

ADV

HOLD

TEMP

press

and

at the same time at initial

PRGM

startup.

To protect the compressor from potential damage

due to temperature change of crankcase oil, this

thermostat has a built-in time delay of one hour less

OPERATING YOUR THERMOSTAT

Before you begin programming your new thermo- The subbase is attached to the wall, but you can

stat, you should be familiar with its features and with remove the thermostat body for easy programming.

the display and the location and operation of the To remove the thermostat body from the subbase,

thermostat buttons. The information in this section grasp the thermostat body and gently pull it straight

willhelpyoubecomefamiliarwithyourthermostatso out from the subbase (see fig. 9). To attach the

that you can easily program it.

thermostatbody, lineupthefourterminalpinsonthe

uppersectionofthethermostatbackwiththematch-

ing connector on the subbase. Insert these, then

gentlypivotthethermostatbodydowntoconnectthe

Your thermostat consists of two parts: the thermo-

stat body and the subbase.

CAUTION

SYSTEM

HEAT-OFF-COOL-AUTO

Use

to turn the thermostat OFF

before removing or attaching the thermo-

stat body. Equipment damage and/or per-

sonal injury could occur.

PULL STRAIGHT OUT

Figure 9. Removing thermostat from subbase

nine pin connectors on the lower portion of the

thermostat back. Gently push until the snap connec-

tors engage (see fig. 10). DO NOT FORCE OR PRY

THE THERMOSTAT, as this may damage the unit.

PARTS OF THE THERMOSTAT

The Back of the Thermostat Body

Turn the thermostat body over. On the back are the

9 volt Energizer^®alkaline battery and the option

switches.

1. The 9 volt Energizer^®alkaline battery provides

power to the thermostat when the 24 VAC power

isinterrupted(forexample,whenyouremovethe

thermostat from the wall for programming). A

fresh battery will maintain the stored program for

approximately one week. If power loss is long

enoughfortheprogramtobelost, thethermostat

will automatically maintain a factory prepro-

grammed heating temperature of 64°F and a

cooling temperature of 82°F after power is re-

stored. You must re-program the thermostat if

this happens.

ENGAGE TWO UPPER GUIDES; PIVOT DOWN

Figure 10. Attaching thermostat to subbase

If the word BAT is flashing in the display window,

the battery is low and should be replaced with a

fresh 9 volt Energizer^®alkaline battery. The

battery will provide power for all functions. If the Following are brief descriptions of the display and

word BAT is displayed continuously (non-flash- the thermostat buttons.

ing), the thermostat is not being supplied with 24

VAC power and is being powered by the battery

alone.

The Display

Continuously displays system mode (HEAT,

EMER, OFF, COOL, AUTO, HOLD). During

programming, the program period is displayed

(MOR, DAY, EVE, NHT).

CAUTION

SYSTEM

HEAT-OFF-COOL-AUTO

Use

to turn thermostat OFF before

Alternately displays room temperature (F de-

removing thermostat from the wall to re-

place the battery.

notes degrees Fahrenheit and C denotes de-

grees Celsius) and time of day (A denotes AM

time and P denotes PM time).

2. You may adjust option switch #4 for automatic

changeover from heating to cooling (see OPER-

ATING FEATURES).

Displays the setpoint temperature.

5 DAY indicates that the displayed program is

the weekday program. 2 DAY indicates that the

displayed program is the weekend program.

Other than

and

, the buttons are located

behind the thermostat door. To open the door, use

your fingernail in the indentation at the top center of

thedoor. Pullthedoorout, thenswingthedoordown

on its hinges.

The word BAT flashes on the display when the

9 volt alkaline battery is weak and should be

replaced. The word BAT will be displayed con-

tinuously (non-flashing) when the thermostat is

operating on battery power only.

FAN

is displayed when the blower is operat-

ing continuously, regardless of heating or cool-

ing system cycling. FAN is displayed during

automaticfanoperation(whentheblowercycles

with the heating or cooling system).

EMER.

DAY

FAN

AUX.

TIME

FWD

SET

VIEW

HOLD

SYSTEM

HEAT-OFF-COOL-AUTO

CLOCK

PRGM

TEMP

TIME

SET

DAY

RUN

ADV

FAN

ON - AUTO

BACK

PRGM

DAY

FAN

DAY

BAT

FAN

The Thermostat Buttons and Lights

Used to initiate or review thermostat program-

ming.

Sets the system mode (HEATing, EMERgency

backup, OFF, COOLing, or AUTOmatic

changeover [user selectable feature]).

13 Used to start program operation after program-

ming. Also used to return thermostat to program

operation after being in HOLD mode.

Selects fan operation (see #6, previous page).

Thisbuttonisalsousedtoprogramthefantorun

continuously during a program period.

Used to manually override programming to hold

at a selected temperature (when HOLD is dis-

played).

Runs display forward or backward through time,

day, or anticipation settings during program-

ming.

Usedtoadvancethermostatprogramtothenext

program period (for example, from the MOR

program to the DAY program).

TIME

FWD

TIME

Used with

and

to set current time

BACK

(Blue arrow) Lowers temperature setting (40°F

or 4°C minimum).

and day of the week.

Used during programming to set the day of the

(Red arrow) Raises temperature setting (99°F

or 37°C maximum)

SET

week. Also used with

tion setting mode.

to enter anticipa-

CLOCK

setpoint temperature — there is a 5 to 10

minute startup delay on the first emergency

cycle). AUX light indicates that the auxiliary

system is operating.

18 EMER light indicates that the system is in the

emergency mode (the heat pump compressor

is off and the auxiliary system is maintaining

16 17

EMER.

5 DAY

FAN

AUX.

TIME

FWD

SET

VIEW

HOLD

SYSTEM

HEAT-OFF-COOL-AUTO

CLOCK

PRGM

TEMP

TIME

SET

DAY

RUN

ADV

FAN

ON - AUTO

BACK

PRGM

10 11 12 13 14 15

system at about 5:00 AM, so that the pro-

grammed70°Ftemperatureisreachedbyabout

6:00 AM.

OPERATING FEATURES

Now that you are familiar with the thermostat display

and buttons, read the following information to learn

about the many features of the thermostat.

• AUTOMATIC CHANGEOVER — You can set

the thermostat to automatically switch the sys-

tem from heating to cooling as needed. First,

you must move option switch #4 (located on the

backofthethermostatbody)totheON position,

if it has not already been done. To do this, press

• COMPUTED ENERGY MANAGEMENT RE-

COVERY (EMR) - The thermostat’s microcom-

puter automatically calculates the time it will

take to change the temperature to the next

program setting. Then the thermostat will acti-

vate the heating or cooling system to change

the temperature so that the desired tempera-

ture is reached at the beginning of the next

program period. As an example of this feature,

assume that you have programmed your ther-

mostat to provide an overnight heating tem-

perature of 62°F, and that during the next pro-

gram period, beginning at 6:00 AM, you have

programmed a temperature of 70°F. The ther-

mostat will automatically activate the heating

SYSTEM

HEAT-OFF-COOL-AUTO

untilthermostatisOFF.Then,remove

the thermostat body from the wall. Check the

position of switch #4 (the last switch on the

right). If it is ON (up), simply put the thermostat

back on the wall and restore 24 VAC power. If

the switch is OFF (down), use a pencil or small

screwdriver to move the switch to the ON posi-

tion(seefigureatright). Leavethebatteryoutof

thethermostatforatleasttwominutes,toallow

the thermostat to reset itself. DO NOT MOVE

ANY OTHER OPTION SWITCH, as it may

affect thermostat operation. Replace the bat-

tery, re-program the thermostat if necessary,

put the thermostat back on the wall, and use

AUTOMATIC CHANGEOVER (ON)

SYSTEM

HEAT-OFF-COOL-AUTO

to set thermostat for desired opera-

tion. To set the thermostat for automatic

Switch #1 set at installation (DO NOT CHANGE)

Switch #2 set at installation (DO NOT CHANGE)

Switch #3 set at installation (DO NOT CHANGE)

Switch #4 ON

SYSTEM

HEAT-OFF-COOL-AUTO

changeoverafterprogramming,press

to set the thermostat to AUTO (the setpoint

display is blank in the AUTO mode). The sys-

temwillnowautomaticallyswitchbetweenheat-

ing and cooling depending on the actual room

temperature.

NOTE

In the AUTO mode, the thermostat will not allow the

temperature separation between the highest heat

settingandthelowestcoolsettingtobelessthat1°F.

For example, if the highest heat setting is 76°F, the

lowest cool setting cannot be below 77°F (see

diagram at left).

COOLING TEMPERATURES

DEAD BAND 1°F

HEATING TEMPERATURES

If the automatic changeover feature is enabled,

AUTOMATIC CHANGEOVER (OFF)

SYSTEM

and you wish to disable it, press

until

HEAT-OFF-COOL-AUTO

thermostat is OFF. Then, remove the thermo-

stat body from the wall. Move the switch to the

ON position (see figure at right). Leave the

battery out of the thermostat for at least two

minutes, to allow the thermostat to reset itself.

DO NOT MOVE ANY OTHER OPTION

SWITCH, as it may affect thermostat operation.

Replace the battery, re-program the thermostat

if necessary, put the thermostat back on the

Switch #1 set at installation (DO NOT CHANGE)

Switch #2 set at installation (DO NOT CHANGE)

Switch #3 set at installation (DO NOT CHANGE)

Switch #4 OFF

• TWO HOUR TEMPERATURE OVERRIDE —

Press

until the display shows the

SYSTEM

wall, and use

desired.

to set the thermostat as

HEAT-OFF-COOL-AUTO

temperatureyouwant.Thethermostatwillover-

ride current programming and keep the room

temperatureattheselectedtemperaturefortwo

hours. After two hours, the thermostat will auto-

matically revert to the program.

• HOLDTEMPERATURE—Thethermostatcan

hold any temperature within its range for an

indefinite period, without reverting to the pro-

cycles), you may want to adjust the anticipation

setting.

HOLD

TEMP

gram. Press

. HOLD will be displayed.

Then choose the desired hold temperature by

pressing or . The thermostat will

CAUTION

hold the room temperature at the selected set-

An anticipation setting of less than 10 may

cause decreased compressor life.

HOLD

ting until you press

to start program op-

TEMP

SET

eration again. This feature is ideal for energy

conservation when the building is unoccupied

for an extended period of time.

To adjust HEAT anticipation, press

and

CLOCK

SET

at the same time. The display will show

DAY

HEAT 18. You may select any anticipation

setting from 4 to 40 (note that for add-on heat

pump systems, a minimum anticipation of

10 is recommended). When you adjust antici-

pation,increaseordecreasethedisplayednum-

ber by only one or two digits, then let the system

run for a while to see if the adjustment is

sufficient. If the heat cycles are too short, press

TIME

• °F/°C CONVERTIBILITY — Press

and

FWD

TIME

at the same time until the temperature

BACK

display is in °C (Celsius). To display °F, repeat

the process.

• ADJUSTABLE HEATING AND COOLING

CYCLETIMES(ANTICIPATION)—Iftheheat-

ing/cooling system is turning on and off too

often (short cycles) or not often enough (long

TIME

to increase the cycle time. If the heat

FWD

continuously (non-flashing), 24 VAC power is

not being supplied and the thermostat is work-

ing on battery power only.

TIME

cycles are too long, press

to decrease

BACK

the cycle time. To set COOL anticipation, press

SET

DAY

•

COMPRESSOR SHORT CYCLE PROTEC-

TION — To protect your compressor from poten-

tial damage due to rapid cycling, this thermostat

has a built-in delay of 5 minutes between cooling

cycles. The following may cause a time delay in

COOL or HEAT:

and

at the same time again. The

CLOCK

display will show COOL 14 (factory

preprogrammed cooling anticipation). Use

TIME

FWD

TIME

and

to adjust anticipation. To set

BACK

AUXILIARY heat anticipation (not applicable to

a) Return of power after a momentary power

outage.

SET

DAY

multi-stage use), press

and

at the

CLOCK

same time again. The display will show AUX 8

(factory preprogrammed auxiliary anticipation).

SYSTEM

HEAT-OFF-COOL-AUTO

b) Pressing

modes.

to change operating

TIME

FWD

TIME

Use

and

to adjust anticipation.

BACK

c) Pressing

to create a call for

RUN

PRGM

Press

to return to your program.

COOL or HEAT too soon after a previous

call.

•

LOW BATTERY INDICATOR — The word BAT

will flash on the display if the battery is low and

should be replaced. When BAT is displayed

During lockout in the COOL mode, the blower

will operate, but compressor operation will be

delayed.

Auxiliary heat is functional during the compres-

sor lockout and can be used as needed to

maintain room temperature.

• SYSTEM INDICATOR LIGHTS — The lights

ontheupperrightpartofthethermostatindicate

system operation (see PARTS OF THE THER-

MOSTAT for specific descriptions of what each

light indicates).

• COMPRESSOR LONG TERM CYCLE PRO-

TECTION — If your system begins to operate

too soon after an extended power outage, the

compressormaybedamagedduetocrankcase

oil temperature change. This thermostat has a

built-in time delay of one hour less than the

power loss (up to 12 hours). When power is

restored to the system, heaters in the system

will begin to heat the crankcase oils. The

thermostat’s time delay will lock out the com-

pressor to prevent its operation until the com-

pressor oil is sufficiently warmed. During the

lockout time period, the auxiliary heating sys-

tem will operate to maintain setpoint tempera-

ture.

• PROGRAMMABLE BLOWER CONTROL —

You may program the fan blower to run continu-

ously during any given program period, regard-

less of the cycling of the heating or cooling

system.Duringprogramming,afterenteringthe

time and temperature for the time period, press

FAN

– AUTO

until FAN

is displayed. To override

FAN

– AUTO

constant fan, press

displayed.

until FAN

For example, if a power outage of three hours

occurs, the compressor will be locked out for

two hours.

PROGRAMMING YOUR THERMOSTAT

Now you are ready to program your thermostat. This two-day program is set to run Saturday and Sunday.

section will help you plan and program your thermo- However, you may choose any five consecutive

stat to meet your needs.

days to be your weekday program days (such as

Sunday through Thursday; in this case, your week-

end program would run on Friday and Saturday).

For maximum comfort and efficiency, keep the fol-

lowing guidelines in mind when planning your pro-

gram.

First, you should answer the following questions to

help you decide what your needs are. If you are

using the thermostat for a commercial application (a

store, office building, etc.), answer questions 1

through 4. If you are using the thermostat in your

home, answer questions 5 through 8. Keep in mind

that you should plan for both weekday and weekend

programs.

• 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 cool-

ing is usually minimal.

PLANNING FOR YOUR NEEDS

FOR COMMERCIAL APPLICATIONS:

1a.What time does the first person arrive at the

building in the morning?

This thermostat will store separate heating and

cooling programs for five-day (weekday) and two-

day (weekend) operation. Usually, the five-day pro-

gram is set to run Monday through Friday, and the

b. What temperature should the building be at this IN YOUR HOME:

time? (heating? cooling?) These will be your

MOR (morning) temperature settings.

5a.What time does the first person get up in the

morning?

2a.What time do the building occupants reach a

maximum activity level (using lights, equipment,

meeting rooms, etc.)?

b. What temperature should the house be at this

time? These will be your MOR (morning) tem-

perature settings.

b. What temperature should the building be at this

time? These will be your DAY temperature set-

tings.

6a.What time does the last person leave the house

in the morning?

b. What temperature should the house be at this

time? These will be your DAY temperature set-

tings.

3a.What time do the building occupants reach a

minimumactivitylevel(limitedpersonnelinbuild-

ing)? These will be your EVE (evening) tempera-

ture settings.

7a.What time does the first person arrive home in

the evening?

b. What temperature should the building be at this

time?

b. What temperature should the house be at this

time? These will be your EVE (evening) tem-

perature settings.

4a.What time does the building become vacant?

b. What temperature should the building be at this

time? These will be your NHT (night) tempera-

ture settings.

8a.What time does the last person go to bed at

night?

NOTE

To operate properly in the AUTO mode, there must

be aminimum 1°F separation between the highest

heat temperature and the lowest cool temperature

(see diagram below).

b. What temperature should the house be at this

time? These will be your NHT (night) tempera-

ture settings.

Now look at the factory preprogrammed times and

temperatures shown below. If this program will suit

COOLING TEMPERATURES

DEAD BAND 1°F

RUN

yourneeds, simplypress

factory preset program.

tobeginrunningthe

PRGM

HEATING TEMPERATURES

If you want to change the preprogrammed times and

temperatures, do the following.

Determine the time periods and heating and cooling

temperatures for your weekday program. You must

program 4 periods for each day (MOR, DAY, EVE,

and NHT). However, you may use the same heating

Cooling Program for ALL Days of the Week:

Heating Program for ALL days of the Week:

TEMP

PERIOD

MOR

DAY

EVE

NHT

TIME

TEMP

PERIOD

MOR

DAY

EVE

NHT

TIME

5:00 AM

9:00 AM

4:00 PM

10:00 PM

5:00 AM

9:00 AM

4:00 PM

10:00 PM

and cooling temperatures for consecutive time peri-

ods. You can choose start times, heating tempera-

tures, and cooling temperatures independently for

bothweekdayandweekendprograms(forexample,

you may select 5:00 AM and 70° as the weekday

MORheatingstarttimeandtemperature,andchoose

7:00AMand76° astheweekdayMORcoolingstart

time and temperature). Use the table on the next

page to plan your program time periods, and the

temperaturesyouwantduringeachperiod.Youmay

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

We recommend that you remove the thermostat

from the wall for programming (especially for enter-

ing cooling programming). A fresh 9 volt Energizer^®

alkaline battery must be installed to perform off-wall

SYSTEM

HEAT-OFF-COOL-AUTO

programming. BE SURE TO PRESS

TURNTHERMOSTATOFFBEFOREREATTACH-

ING TO SUBBASE!

You cannot program the thermostat with the SYS-

TEM SWITCH in the AUTO position.

(Instructions continue on page 40).

Heating/Cooling Schedule Plan

WEEKEND (2 DAY)

WEEKDAY (5 DAY)

Start

Time

Start

Time

Temperature

MOR HEAT

DAY HEAT

EVE HEAT

NHT HEAT

MOR COOL

DAY COOL

EVE COOL

NHT COOL

SAMPLE

Heating/Cooling Schedule Plan

WEEKEND (2 DAY)

WEEKDAY (5 DAY)

Start

Time

Start

Time

Temperature

MOR HEAT

DAY HEAT

EVE HEAT

NHT HEAT

MOR COOL

DAY COOL

EVE COOL

NHT COOL

5:30 AM

68°

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°

8:00 AM

5:00 PM

10:30 PM

6:30 AM

2:00 PM

5:00 PM

10:30 PM

65°

70°

65°

76°

78°

72°

78°

70°

65°

76°

74°

72°

78°

Set Current Time and Day

SET

DAY

5. Press

once. The display will show the day

SET

of the week as an abbreviation (MO for Monday,

TU for Tuesday, etc.).

1. Press

once. The display will show min-

CLOCK

utes only.

TIME

FWD

TIME

6. Press and hold either

until you

BACK

EXAMPLE:

reach the current day of the week.

TIME

FWD

TIME

2. Press and hold either

until you

BACK

RUN

7. Press

once. The display will show the

PRGM

reach the correct minutes.

correct time and room temperature alternately.

SET

3. Press

once. The display window will

Enter Heating Program

CLOCK

show the hour only.

EXAMPLE:

During programming, if you don’t press any buttons

for 5 minutes, the thermostat will enter the HOLD

mode and will maintain a constant temperature. The

display will revert to the alternating time/tempera-

ture display. To resume programming after this

TIME

FWD

TIME

4. Press and hold either

until you

BACK

VIEW

reach the correct hour and AM/PM designation

(AM begins at midnight; PM begins at noon).

happens, press

until you are at the point

PRGM

where you stopped programming. Then you may

continue to enter your programs normally. If you

want to stop programming at any time, simply press 3. To change the displayed start time to your se-

lected start time for weekday MOR heat pro-

RUN

to resume program operation.

PRGM

TIME

FWD

TIME

gram, press

until your selected

BACK

SYSTEM

HEAT-OFF-COOL-AUTO

1. Press

until HEAT is displayed.

time appears. The time will change in 15 minute

increments.

VIEW

2. Press

once. 5 DAY (indicating weekday

PRGM

4. Press

until you reach your se-

program), and MOR, representing the morning

heating period, will appear in the display. Also

displayed are the currently programmed start

time for the MOR period and the currently pro-

grammed temperature.

lected weekday MOR heating temperature.

5. If you want the fan to run continuously during this

FAN

– AUTO

period, press

until FAN

is displayed.

VIEW

6. Press

. The currently programmed start

PRGM

EXAMPLE:

5 DAY

time and heating temperature for weekday DAY

will be displayed.

This display window shows that for the weekday

MOR period, the start time is 5:00 AM, and 64° is

the programmed temperature (this example re-

flects factory preprogramming).

7. Repeat steps 3 through 5 to select the start time

and heating temperature for the weekday DAY

program.

8. Repeat steps 3 through 7 for the weekday EVE

and NHT heating programs.

9. After entering your weekday heating program,

repeat steps 1 through 8 for your weekend pro-

gramming (keep in mind that for weekend pro-

gramming, thedisplayshouldbechangedfrom5

DAY to 2 DAY).

Enter Cooling Program

CAUTION

If outside temperature is below 50°F, we

recommendthatyouremovethethermostat

from the wall before proceeding with the

following steps to program cooling tem-

peratures. Personal injury or property dam-

age may occur due to air conditioner com-

pressor slugging. A fresh 9 volt Energizer^®

alkalinebatterymustbeinstalledtoperform

off-wall programming. Programming away

fromthewallshouldpreventaccidentalcom-

pressor operation. BE SURE TO USE

10.Whenyouhavecompletedenteringyourheating

RUN

program, press

PRGM

SYSTEM

HEAT-OFF-COOL-AUTO

TO TURN THERMOSTAT OFF BE-

FORE REATTACHING TO SUBBASE!

SYSTEM

HEAT-OFF-COOL-AUTO

SYSTEM

HEAT-OFF-COOL-AUTO

1. Press

until COOL is displayed.

4. Press

until COOL is displayed.

2. Follow the procedure for entering your heating 5. Repeat step 2 to check cooling temperatures.

program, using your selected cooling times and

RUN

6. Press

to begin program operation.

temperatures.

PRGM

CHECK YOUR PROGRAMMING

YOUR THERMOSTAT IS NOW COMPLETELY

PROGRAMMED AND READY TO AUTOMATI-

CALLYPROVIDEMAXIMUMCOMFORTANDEF-

FICIENCY!

Follow these steps to check your thermostat pro-

gramming one final time before beginning thermo-

stat operation.

SYSTEM

HEAT-OFF-COOL-AUTO

Press

until OFF is displayed. Reattach

SYSTEM

HEAT-OFF-COOL-AUTO

1. Press

until HEAT is displayed.

SYSTEM

HEAT-OFF-COOL-AUTO

thermostat to subbase. Then press

VIEW

2. Press and hold

to view the heating period

PRGM

select the operation mode you want (HEAT, COOL,

times and temperatures in sequence for week-

day, then weekend MOR, DAY, EVE, and NHT

program periods.

FAN

– AUTO

AUTO). Press

until FAN

is displayed

(automatic cycling).

RUN

3. Press

PRGM

QUESTIONS AND ANSWERS

1. How can I permanently change a part of my 3. How can I finish my programming if the dis-

program?

play has already changed to time/tempera-

ture?

VIEW

Press

until you reach the time/tempera-

PRGM

During programming, if no buttons are pressed

for five minutes, the thermostat will enter the

HOLD mode and maintain a constant tempera-

ture. The display will change to the time/tem-

perature mode. To resume programming, press

ture schedule you want. Then press

TIME

FWD

TIME

and

to change the pro-

BACK

gram. See PROGRAMMING YOUR THERMO-

STAT.

VIEW

until you return to the point where you

PRGM

2. How can I have no change in temperature

from one time period to another?

stopped programming. Then you may continue

to program the thermostat normally. If you want

Simply select the same temperature for each

consecutive time period. For example, you may

select the same weekday EVE cooling tempera-

ture as you did for weekday DAY, which means

the temperature will not change when the EVE

period begins. See PROGRAMMING YOUR

THERMOSTAT.

RUN

tostopprogrammingatthispoint, press

PRGM

start the normal program function. See PRO-

GRAMMING YOUR THERMOSTAT.

4. What happens if the electricity goes off or is 6. What can cause the thermostat display to

manually shut off?

freeze or go blank?

If you have not installed a 9 volt alkaline battery,

the display will go blank and the program will be

lost in approximately one minute. When electric-

ity is restored, the thermostat will maintain a

heating temperature of 64°F and a cooling tem-

perature of 82°F until you reenter your program.

Setpoint temperature will not be displayed.

If a fresh 9 volt Energizer^®alkaline battery is

installed, the program will be maintained for

about one week with no 24 VAC power present

to the thermostat. See OPERATING YOUR

THERMOSTAT.

A completely blank display may indicate that

power has been lost to the thermostat and the

backup battery is also dead. However, if there is

power to the thermostat and the display is blank

or frozen, static discharge is probably the cause.

During periods of low humidity (especially during

cold weather), you may feel or see a spark

discharge when you touch the thermostat. This

may cause the program to be lost or the thermo-

stattodisplayincorrectly.Tocorrectthis,remove

the thermostat from the wall and disconnect the

battery. Wait about one minute, then re-connect

the battery. The thermostat will revert to the

factory preset program until you re-program the

thermostat. If you don’t want to re-program the

5. Why can’t I program the thermostat in the

AUTO mode?

The thermostat can only be programmed in the

HEATandCOOLmodes.SeePROGRAMMING

YOUR THERMOSTAT.

SYSTEM

HEAT-OFF-COOL-AUTO

thermostat immediately, press

until

OFF is displayed and replace the thermostat on

the heating temperature higher. To set a lower

cooling temperature, you must select a lower

heating temperature. See PROGRAMMING

YOUR THERMOSTAT.

SYSTEM

HEAT-OFF-COOL-AUTO

the wall. Then press

for desired sys-

to begin the

RUN

PRGM

tem operation, and press

factory preset program. Or you may re-program

the thermostat, then replace it on the wall.

8. The display is flashing BAT. What does this

mean?

To prevent further static discharge problems,

touch another object to release static build-up

before touching the thermostat. See OPERAT-

ING YOUR THERMOSTAT.

The 9 volt battery installed in the thermostat is

low and should be replaced with a fresh 9 volt

Energizer^®alkaline battery. See OPERATING

YOUR THERMOSTAT.

7. Why won’t the setpoint temperature go to the

temperature I want?

9. The display shows a continuous (non-flash-

ing) BAT. What does this mean?

In the AUTO mode, the highest heating setpoint

temperature you select must be at least 1°F

lower than the lowest cooling setpoint tempera-

ture you select (for example, if 70°F is your

lowestselectedcoolingtemperature, youcannot

select a heating temperature any higher than

69°F). If such a conflict exists, you must set the

lowest cooling temperature higher in order to set

Thethermostatisnotbeingsuppliedwith24VAC

power. The thermostat is operating on battery

power alone. See OPERATING YOUR THER-

MOSTAT.

10.Why won’t the system turn on, even though 11.Why doesn’t the temperature change at the

the thermostat display is functioning nor-

mally?

time I programmed?

There may be a number of causes for this situa-

tion. The following are primary reasons.

Either the compressor lockout feature is in op-

eration or the thermostat is not currently calling

for heat or cool. Wait about 5 minutes for the

compressorlockouttoexpire. Ifthesystemisstill

not running, read the cautionary statement be-

•

The EMR function is operating. The EMR

function will automatically bring on the sys-

tem automatically to bring the temperature

to the selected level by the beginning of the

next program period. See OPERATING

YOUR THERMOSTAT.

low.Then,ifconditionspermit,usethe

buttons to move the temperature above or

below the setpoint temperature. See OPERAT-

ING YOUR THERMOSTAT.

•

You have programmed the incorrect day or

time.Checkyourprogramming(besurethat

the times you programmed are correct AM

or PM times). See PROGRAMMING YOUR

THERMOSTAT.

CAUTION

If the outside temperature is below 50°F, DO

NOTuse or tomovethetempera-

ture above or below the setpoint tempera-

ture. Property damage may result due to

compressor slugging.

The thermostat is in the HOLD mode. Press

RUN

to start program operation. See OP-

PRGM

ERATING YOUR THERMOSTAT.

•

The compressor lockout feature is operat- 14.Betweenheatingandcoolingseasons, Iwant

ing;waitabout5minutesforsystemtobegin

running. See OPERATING YOUR THER-

MOSTAT.

to turn my system off. Can I do this without

affecting my thermostat programming?

Any time you wish to turn your system off, simply

12.Why does the blower fan keep running after

the system has turned off?

SYSTEM

HEAT-OFF-COOL-AUTO

press

until OFF is displayed. This will

not affect your thermostat’s programming in any

•

You have programmed the fan to run con-

tinuouslyduringthisperiod.SeePROGRAM-

MING YOUR THERMOSTAT.

SYSTEM

HEAT-OFF-COOL-AUTO

way. To turn the system back on, press

untilHEAT,COOL, etc. isdisplayed. Thesystem

will automatically begin operating according to

the current thermostat program, unless the ther-

mostat is in the HOLD mode. See OPERATING

YOUR THERMOSTAT.

•

The blower delay feature is operating. This

energy saving feature continues to blow

conditioned air through the ducts after the

system has turned off, rather than letting the

air dissipate.

13.Why is the system turning on and off so

frequently (seldom)?

The anticipation setting is too low (high). To

change anticipation settings, see OPERATING

YOUR THERMOSTAT.

15.Iliveinanareawheredaylightsavingstimeis

observed. How do I change the thermostat

clock twice a year without affecting thermo-

stat programming?

withinoneminute,youmaynotloseyourthermo-

stat programming. After installing a new battery,

follow the procedures in CHECK YOUR PRO-

GRAMMING to determine whether your pro-

gramming was maintained. If the thermostat

To change your clock, follow the instructions for

setting current time and day. See ENTERING

YOUR PROGRAM. Thermostat programming is

not affected when you change the clock.

SYSTEM

HEAT-OFF-COOL-AUTO

maintains programming, press

until

OFF is displayed, put the thermostat back on the

SYSTEM

HEAT-OFF-COOL-AUTO

wall,press

toselecttheoperatingmode

17.Do I have to re-program my thermostat after

I change the battery?

RUN

you want, then press

to start program

PRGM

When the thermostat is on the wall and the

system has power, the thermostat is being pow-

ered by a 24v AC source. If power is lost, or if the

thermostat is removed from the wall, the pro-

gram will be retained for approximately one

minute if there is no battery installed or if the

installed battery is dead. If you are changing the

battery after seeing a flashing BAT on the dis-

play, the installed battery may be dead. If you

remove the old battery and install a fresh one

operation. If the program is lost, re-program the

thermostat.SeePROGRAMMINGYOURTHER-

MOSTAT.