White Rodgers 1F90W 51 Thermostat User Manual

About Your New Thermostat . . .

Your new White-Rodgers 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.

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

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

In This Guide . . .

YOUR NEW THERMOSTAT'S

PROGRAMMING YOUR

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

OPERATING YOUR THERMOSTAT ......... 5

PARTS OF THE THERMOSTAT

The Back Of the Thermostat Body

The Display

THERMOSTAT .................................... 16

PLANNING FOR YOUR NEEDS

ENTERING YOUR PROGRAM

Set Current Time and Day

Enter Heating Program

The Thermostat Buttons

Enter Cooling Program

OPERATING FEATURES

CHECK YOUR PROGRAMMING

QUESTIONS AND ANSWERS................. 26

Operator: Save this

booklet for future use!

YOUR NEW THERMOSTAT’S FEATURES

• Separate5-day(weekday)and2-day(week-

• Preprogrammed temperature control

• Adjustable cycle times

• Compressor short cycle protection

• Programmable blower control

end) setback programming

• Simultaneous heat and cool program stor-

age

• Fourseparatetime/temperaturesettingsper

24-hour period

• Computed Energy Management Recovery

(EMR)

• Armchair programming capability

• Backlit LCD displays continuous set point,

time, and room temperature

• Blower delay in the cooling cycle

• Audio and visual prompting during opera-

tion

• Two hour temperature override

• Manual program override (HOLD tempera-

ture)

• "Advance Program" key

• °F/°C convertibility

• Temperature range 40° to 99°F

• 1.5 volt "AA" Energizer^®alkaline battery

backup

OPERATING YOUR THERMOSTAT

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

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

with the display and the location and operation ming. To remove the thermostat body from the

of the thermostat buttons. The information in subbase, grasp the thermostat body and gently

this section will help you become familiar with pull it straight out from the subbase. To attach

your new thermostat so that you can easily thethermostatbody, lineupthesixterminalpins

program it.

on the upper section of the thermostat back with

the matching connector on the subbase. Insert

Your thermostat consists of two parts: the

thermostat body and the subbase.

CAUTION

SUBBASE

Remove power from the system at the

circuit breaker/fuse box before removing

or attaching the thermostat body. Equip-

mentdamageand/orpersonalinjurycould

occur.

THERMOSTAT

BODY

these, then gently pivot the thermostat body for approximately a year. If power loss is long

down to connect the three pin connectors on the enough for the program to be lost, the thermo-

lower portion of the thermostat back. Gently stat will automatically return to the factory pro-

push until the snap connectors engage. DO grammed temperatures (64°F heating and 82°F

NOT FORCE OR PRY THE THERMOSTAT, as cooling) when power is restored. You must

this may damage the unit.

reprogram the thermostat if this happens.

If the word BATTERY is flashing in the display

window, the batteries are low and should be

replaced with fresh "AA" Energizer® alkaline

batteries.

PARTS OF THE THERMOSTAT

The Back of The Thermostat Body

CAUTION

Turn the thermostat body over. On the back are

the 3 "AA" Energizer^®alkaline batteries.

Before removing thermostat from the

wall to replace the batteries, remove

24vAC power from the thermostat at the

breaker/fuse box.

The "AA" Energizer^®alkaline batteries provide

power to the thermostat when the 24vAC power

is interrupted (for example, when you remove

the thermostat from the wall for programming).

Fresh batteries will maintain the stored program

Batteries

Other than

and

, the buttons are

6-pin Connector

locatedbehindthethermostatdoor. Toopenthe

door, pull the door out from the top, then swing

it down on its hinges.

On the following pages there are brief descrip-

tions of the display and the thermostat buttons.

3-pin Connector

BACK OF THERMOSTAT BODY

The Display

The word BATTERY flashes on the display

when the "AA" alkaline batteries are weak

and should be replaced. The word BAT-

TERY is displayed continuously (non-flash-

ing) when thermostat is running on battery

power only.

Continuouslydisplayssystemmode(HEAT,

OFF,COOL,HOLD). Duringprogramming,

theprogramperiodisdisplayed(MOR,DAY,

EVE, or NHT).

Alternately displays room temperature (F

denotesdegreesFahrenheitand Cdenotes

degrees Celsius) and time of day (A de-

notes AM time and P denotes PM time).

FAN ON is displayed when the blower is

operating continuously. FAN AUTO is dis-

playedduringautomaticfanoperation(when

theblowercycleswiththeheatingorcooling

system).

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.

DAY

FAN AUTO

TIME

FWD

SET

VIEW

HOLD

TEMP

SYSTEM

HEAT-OFF-COOL

CLOCK

PRGM

TIME

SET

DAY

RUN

ADV

FAN

ON - AUTO

BACK

PRGM

DAY

FAN AUTO

DAY

FAN ON

BATTERY

The Thermostat Buttons

Used to initiate or review thermostat pro-

gramming.

Sets the system mode (HEATing, OFF, or

COOLing).

Used to start program operation after pro-

gramming. Also used to return thermostat

to program operation after being in HOLD

mode.

Selects fan operation (see #6, above). This

button is also used to program the fan to run

continuously during a program period.

Used to manually override programming to

holdataselectedtemperature(whenHOLD

is displayed).

Runs display forward or backward through

time, day, or anticipation settings during

programming.

Used to advance thermostat program to the

next program period (for example, from the

MOR program to the DAY program).

TIME

FWD

TIME

Used with

time.

and

to set current

BACK

16 (Red arrow) Raises temperature setting

(99°F or 37°C maximum).

TIME

FWD

TIME

Usedwith

and

tosetthecurrent

BACK

(Blue arrow) Lowers temperature setting

(40°F or 4°C minimum).

day of the week. Also used in conjunction

SET

with

toenteranticipationsettingmode.

CLOCK

18 Theredindicatorlightglowswheneverheat-

ing, cooling, or fan are in operation.

17 16

DAY

FAN AUTO

TIME

FWD

SET

VIEW

HOLD

TEMP

SYSTEM

HEAT-OFF-COOL

CLOCK

PRGM

TIME

SET

DAY

RUN

ADV

FAN

ON - AUTO

BACK

PRGM

14 15

temperature of 62°F, and that during the

next program period, beginning at 6:00 AM,

you have programmed a temperature of

70°F. The thermostat will automatically

activate the heating system at about 5:00

AM, so that the programmed 70°F tempera-

ture is reached by about 6:00 AM.

OPERATING FEATURES

Now that you are familiar with the thermostat

display and buttons, read the following informa-

tion to learn about the many features of the

thermostat.

The thermostat is configured at the factory

so that this feature is disabled. If you wish

to have this feature, refer to the installation

instructions for this thermostat, or contact

your local heating/cooling contractor.

• COMPUTED ENERGY MANAGEMENT

RECOVERY (EMR) — At installation, the

thermostat can be set to automatically cal-

culate the time it will take to change the

temperature to the next program setting.

Then the thermostat will activate the heat-

ing or cooling system to change the tem-

perature so that the desired temperature is

reached at the beginning of the next pro-

gram period. As an example of this feature,

assume that you have programmed your

thermostat to provide an overnight heating

• TWO HOUR TEMPERATURE OVER-

RIDE — Press

until the

display shows the temperature you

want. The thermostat will override cur-

rent programming and keep the room

temperature at the selected tempera-

ture for two hours. After two hours, the

thermostat will automatically revert to

the program.

overridetheprogram,untilthenextprogram

period begins (for example, pressing this

key while in the DAY program will advance

the thermostat to the EVE program, which

will remain in effect until the NHT program

begins).

• HOLD TEMPERATURE — The thermostat

can hold any temperature within its range

for an indefinite period, without reverting to

HOLD

the program. Press

displayed. Then choose the desired hold

temperature by pressing or

. HOLD will be

TEMP

TIME

• °F/°C CONVERTIBILITY — Press

FWD

TIME

and

at the same time until the tem-

BACK

The thermostat will hold the room tempera-

ture at the selected setting until you press

RUN

perature display is in °C (Celsius). To

display °F, repeat the process.

to start program operation again.

PRGM

• ADJUSTABLE HEATING AND COOLING

CYCLE TIMES (ANTICIPATION) — If the

heating/cooling system is turning on and off

too often (short cycles) or not often enough

(long cycles), you may want to adjust the

anticipation setting.

Thisfeatureisidealforenergyconservation

when the building is unoccupied for an ex-

tended period of time.

• "ADVANCE PROGRAM" BUTTON —

ADV

Press

tochangethethermostattothe

PRGM

next program period. This will temporarily

TIME

FWD

CAUTION

cycles are too short, press

to increase

the cycle time. If the heat cycles are too long,

A cooling anticipation setting of less

than 10 may cause decreased compres-

sor life.

TIME

press

to decrease the cycle time. To

BACK

SET

set cooling anticipation, press

and

CLOCK

SET

To adjust heat anticipation, press

CLOCK

atthesametimeagain. Thedisplaywill

DAY

SET

showCOOL14(factorypreprogrammedcool-

and

atthesametime. Thedisplaywill

DAY

TIME

FWD

TIME

show HEAT 5 (this is the factory prepro-

grammedheatinganticipationsetting). You

may select any anticipation setting from 2 to

40 (note that for hydronic systems, a

minimum anticipation setting of 15 is

recommended). Whenever adjusting an-

ticipation, increase or decrease the dis-

played number by only one or two digits,

then let the system run for a while to see if

the adjustment is sufficient. If the heat

ing anticipation). Use the

and

BACK

RUN

PRGM

buttonstoadjustanticipation. Press

return to your program.

• LOW BATTERY INDICATOR — The word

BATTERY will flash on the display if the

"AA" alkaline batteries are low and should

be replaced. The word BATTERY will be

displayedcontinuously(non-flashing)when

24v AC power is not being supplied to the

thermostat and the thermostat is operating

on battery power only.

• COMPRESSORSHORTCYCLEPROTEC-

TION — To protect your compressor from

potential 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:

• AUDIO PROMPTING — Each time you

press a button, the thermostat will beep.

• BACKLIT DISPLAY — When you press

any button on the thermostat, the display is

lit for approximately eight seconds.

• SYSTEM INDICATOR LIGHT — The red

lightontheupperrightpartofthethermostat

indicatessystemoperation(seePARTSOF

THE THERMOSTAT).

a) Return of power after a power outage.

SYSTEM

HEAT-OFF-COOL

b) Pressing

to change operating

modes.

c) Pressing

, creating a call for COOL

too soon after a previous call.

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.

PLANNING FOR YOUR NEEDS

First, answer the following questionsto help you

decide what your needs are. If you are using the

thermostatforacommercialapplication(astore,

officebuilding,etc.),answerquestions1through

4. If you are using the thermostat in your home,

answer questions 5 through 8.

For maximum comfort and efficiency, keep the

following guidelines in mind when planning your

program.

• When heating (cooling) your building, pro-

gramthetemperaturestobecooler(warmer)

when the building is vacant or during peri-

ods of low activity.

FOR COMMERCIAL APPLICATIONS:

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

building in the morning?

• During early morning hours, the need for

cooling is usually minimal.

b. What temperature should the building be at

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

your MOR (morning) temperature settings.

2a. What time do the building occupants reach IN YOUR HOME:

amaximumactivitylevel(usinglights,equip- 5a. What time does the first person get up in the

ment, meeting rooms, etc.)?

b. What temperature should the building be at

this time? These will be your DAY tempera-

ture settings.

morning?

b. What temperature should the house be at

this time? These will be your MOR (morn-

ing) temperature settings.

3a. What time do the building occupants reach 6a. What time does the last person leave the

a minimum activity level (limited personnel

in building)?

b. What temperature should the building be at

thistime? ThesewillbeyourEVE (evening)

temperature settings.

4a. Whattimedoesthebuildingbecomevacant?

b. What temperature should the building be at

this time? These will be your NHT (night)

temperature settings.

house in the morning?

b. What temperature should the house be at

this time? These will be your DAY tempera-

ture settings.

7a. What time does the first person arrive home

in the evening?

b. What temperature should the house be at

thistime? ThesewillbeyourEVE (evening)

temperature settings.

8a. What time does the last person go to bed at If you want to change the preprogrammed times

night?

and temperatures, do the following.

b. What temperature should the house be at

this time? These will be your NHT (night)

temperature settings.

Determine the time periods and heating and

cooling temperatures for your weekday pro-

gram. You must program 4 periods for each day

(MOR, DAY, EVE, and NHT). However, you

mayusethesameheatingandcoolingtempera-

tures for consecutive time periods. You can

choose start times, heating temperatures, and

cooling temperatures independently for both

Now look at the factory preprogrammed times

and temperatures shown below. If this program

RUN

will suit your needs, simply press

to begin

PRGM

running the factory preset program.

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

weekday and weekend programs (for example,

youmayselect5:00AMand70° astheweekday

NOTE

MOR heating start time and temperature, and We recommend that you remove the thermostat

choose 7:00 AM and 76° as the weekday MOR from the wall for programming (especially for

cooling start time and temperature). Use the entering cooling programming). Fresh "AA"

following table to plan your program time peri- Energizer^®alkaline batteries must be installed

ods,andthetemperaturesyouwantduringeach to perform off-wall programming. BE SURE

period. You may also want to look at the sample SYSTEM SWITCH IS SET TO OFF POSITION

program table to get an idea of how the thermo- BEFORE REATTACHING THERMOSTAT TO

stat can be programmed.

SUBBASE!

Set Current Time and Day

ENTERING YOUR PROGRAM

SET

Follow these steps to enter the heating and

cooling programs you have selected.

1. Press

once. The display will show

CLOCK

minutes only.

EXAMPLE:

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

68°F

Temperature

68°F

MOR HEAT

DAY HEAT

EVE HEAT

NHT HEAT

MOR COOL

DAY COOL

EVE COOL

NHT COOL

5:30 AM

7:00 AM

11:00 AM

6:00 PM

11:30 PM

7:00 AM

12:30 PM

6:00 PM

11:30 PM

8:00 AM

5:00 PM

10:30 PM

6:30 AM

2:00 PM

5:00 PM

10:30 PM

65°F

70°F

65°F

76°F

78°F

72°F

78°F

70°F

65°F

76°F

74°F

72°F

78°F

TIME

FWD

TIME

RUN

2. Press and hold either

until 7. Press

once. Thedisplaywillshowthe

BACK

PRGM

you reach the correct minutes.

correct time and room temperature alter-

nately.

SET

3. Press

once. The display window will

CLOCK

show the hour only.

EXAMPLE:

Enter Heating Program

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/temperature display. To re-

sume programming after this happens, press

VIEW

TIME

FWD

TIME

4. Press and hold either

until

BACK

you reach the correct hour and AM/PM

designation (AM begins at midnight; PM

begins at noon).

SET

5. Press

once. Thedisplaywillshowthe

DAY

untilyouareatthepointwhereyoustopped

PRGM

day of the week as an abbreviation (MO for

Monday, TU for Tuesday, etc.).

programming. Then you may continue to enter

your programs normally. If you want to stop

TIME

FWD

TIME

6. Press and hold either

until

RUN

BACK

programming at any time, simply press

resume program operation.

PRGM

you reach the current day of the week.

TIME

FWD

TIME

SYSTEM

HEAT-OFF-COOL

1. Press

2. Press

until HEAT is displayed.

program, press

until your

BACK

selectedtimeappears. Thetimewillchange

in 15 minute increments.

VIEW

once. 5 DAY (indicating week-

PRGM

day 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 programmed tempera-

ture.

4. Press

until you reach your

selected weekday MOR heating tempera-

ture.

5. If you want the fan to run continuously

FAN

during this period, press

until PRG

ON – AUTO

FAN is displayed.

EXAMPLE:

5 DAY

VIEW

6. Press

. The currently programmed

This display window shows that for the

weekday MOR period, the start time is 5:00

AM, and 70° is the programmed tempera-

ture (this example reflects factory prepro-

gramming).

PRGM

starttimeandheatingtemperatureforweek-

day DAY will be displayed.

7. Repeat steps 3 through 5 to select the start

time and heating temperature for the week-

day DAY program.

3. To change the displayed start time to your

selected start time for weekday MOR heat

8. Repeat steps 3 through 7 for the weekday

EVE and NHT heating programs.

9. After entering your weekday heating pro-

gram, repeat steps 1 through 8 for your

weekend programming (keep in mind that

for weekend programming, the display

should be changed from 5 DAY to 2 DAY).

10. When you have completed entering your

RUN

be installed to perform off-wall program-

ming. Programming away from the wall

should prevent accidental compressor

operation. BE SURE SYSTEM SWITCH

IS SET TO OFF POSITION BEFORE RE-

ATTACHINGTHETHERMOSTATTOTHE

SUBBASE!

heating program, press

PRGM

SYSTEM

HEAT-OFF-COOL

1. Press

until COOL appears.

Enter Cooling Program

2. Followtheprocedureforenteringyourheat-

ing program, using your selected cooling

times and temperatures.

CAUTION

If outside temperature is below 50°F, we

recommend that you remove the ther-

mostat from the wall before proceeding

withthefollowingstepstoprogramcool-

ing temperatures. Personal injury or

property damage may occur due to air

conditionercompressorslugging. Fresh

"AA" Energizer^®alkaline batteries must

CHECK YOUR PROGRAMMING

Follow these steps to check your thermostat

programming one final time before beginning

thermostat operation.

YOURTHERMOSTATISNOWCOMPLETELY

PROGRAMMEDANDREADYTOAUTOMATI-

CALLYPROVIDEMAXIMUMCOMFORTAND

EFFICIENCY!

SYSTEM

HEAT-OFF-COOL

1. Press

until HEAT is displayed.

VIEW

2. Press and hold

to view the heating

PRGM

period times and temperatures in sequence

for weekday, then weekend MOR, DAY,

EVE, and NHT program periods.

SYSTEM

Press

until OFF is displayed. Reattach

HEAT-OFF-COOL

thermostat to subbase. Turn on power to the

RUN

3. Press

4. Press

PRGM

SYSTEM

HEAT-OFF-COOL

system. Thenpress

toselecttheopera-

SYSTEM

HEAT-OFF-COOL

until COOL is displayed.

tion mode you want (HEAT or COOL). Press

5. Repeat step 2 to check cooling tempera-

tures.

FAN

ON – AUTO

until FAN AUTO is displayed (auto-

matic cycling).

RUN

6. Press

to begin program operation.

PRGM

QUESTIONS AND ANSWERS

1. How can I permanently change a part of

change when the EVE period begins. See

PROGRAMMING YOUR THERMOSTAT.

my program?

VIEW

3. How can I finish my programming if the

display has already changed to time/

temperature?

Press

until you reach the time/tem-

PRGM

perature schedule you want. Then press

TIME

FWD

TIME

and

During programming, if no buttons are

pressed for five minutes, the thermostat will

enter the HOLD mode and maintain a con-

stant temperature. The display will change

to the time/temperature mode. To resume

VIEW

BACK

change the program. See PROGRAM-

MING YOUR THERMOSTAT.

2. How can I have no change in tempera-

ture from one time period to another?

Simply select the same temperature for

eachconsecutivetimeperiod. Forexample,

you may select the same weekday EVE

cooling temperature as you did for weekday

DAY, which means the temperature will not

programming, press

until you return

PRGM

to the point where you stopped program-

ming. Then you may continue to program

the thermostat normally. If you want to stop

RUN

programming at this point, press

PRGM

start the normal program function. See 5. What can cause the thermostat display

PROGRAMMING YOUR THERMOSTAT.

to freeze or go blank?

A completely blank display may indicate

that power has been lost to the thermostat

and the backup battery is also dead. How-

ever, if there is power to the thermostat and

the display is blank or frozen, static dis-

charge is probably the cause.

4. What happens if the electricity goes off

or is manually shut off?

If you have not installed 3 "AA" alkaline

batteries, the display will go blank and the

program will be lost in approximately one

minute. When electricity is restored, the

clock will reset itself to 12:00 PM (noon) and

the thermostat will maintain a heating tem-

perature of 64°F and a cooling temperature

of 82°F until you reenter your program.

Setpoint temperature will not be displayed.

If fresh "AA" Energizer^®alkaline batteries

are installed, the program will be main-

tained for about one year with no 24vAC

power present to the thermostat. See OP-

ERATING YOUR THERMOSTAT.

During periods of low humidity (especially

during cold weather), you may feel or see a

spark discharge when you touch the ther-

mostat. This may cause the program to be

lost or the thermostat to display incorrectly.

To correct this, remove the thermostat from

the wall and disconnect the battery. Wait

about one minute, then reconnect the bat-

tery. Thethermostatwillreverttothefactory

preset program until you reprogram the

thermostat. If you don’t want to reprogram

7. The display shows a continuous (non-

flashing) BATTERY. What does this

mean?

SYSTEM

HEAT-OFF-COOL

the thermostat immediately, press

until OFF is displayed and replace the ther-

RUN

The thermostat is not being supplied with

24vAC power. The thermostat is operating

on battery power alone. See OPERATING

YOUR THERMOSTAT.

mostat on the wall. Then press

PRGM

begin the factory preset program. Or you

may reprogram the thermostat, then re-

place it on the wall.

8. Why won’t the compressor turn on, even

though the thermostat display is func-

tioning normally?

To prevent further static discharge prob-

lems, touch another object to release static

build-up before touching the thermostat.

See OPERATING YOUR THERMOSTAT.

Either the compressor lockout feature is in

operation or the thermostat is not currently

callingforcool. Waitabout5minutesforthe

compressor lockout to expire. If the system

isstillnotrunning,readthecautionarystate-

ment at right. Then, if conditions permit,

6. The display is flashing BATTERY. What

does this mean?

The "AA" batteries installed in the thermo-

stat are low and should be replaced with

fresh"AA"Energizer^®alkalinebatteries. See

OPERATING YOUR THERMOSTAT.

use the

button to move the tempera-

ture below the setpoint temperature. See

OPERATING YOUR THERMOSTAT.

See OPERATING YOUR THERMO-

STAT.

CAUTION

If the outside temperature is below 50°F,

DONOTusethe buttontomovethe

temperaturebelowthesetpointtempera-

ture. Property damage may result due to

compressor slugging.

•

You have programmed the incorrect day

or time. Check your programming (be

sure that the times you programmed are

correct AM or PM times). See PRO-

GRAMMING YOUR THERMOSTAT.

The thermostat is in the HOLD mode.

RUN

•

9. Why doesn’t the temperature change at

the time I programmed?

Press

to start program operation.

PRGM

There may be a number of causes for this

situation. The following are primary rea-

sons.

See OPERATING YOUR THERMO-

STAT.

The compressor lockout feature is oper-

ating; wait about 5 minutes for system to

beginrunning. SeeOPERATINGYOUR

THERMOSTAT.

•

The EMR function is operating. The

EMR function will automatically bring on

the system automatically to bring the

temperature to the selected level by the

beginning of the next program period.

10. Why does the blower fan keep running

after the system has turned off?

•

You have programmed the fan to run

continuously during this period. See 12. Between heating and cooling seasons, I

PROGRAMMING YOUR THERMO-

STAT.

want to turn my system off. Can I do this

without affecting my thermostat pro-

gramming?

•

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.

Any time you wish to turn your system off,

SYSTEM

HEAT-OFF-COOL

simplypress

untilthedisplayshows

OFF. This will not affect your thermostat’s

programming in any way. To turn the sys-

SYSTEM

11. Why is the system turning on and off so

frequently (seldom)?

tem back on, press

until HEAT,

HEAT-OFF-COOL

The anticipation setting is too low (high). To

change anticipation settings, see OPER-

ATING YOUR THERMOSTAT.

COOL, etc. is displayed. The system will

automatically begin operating according to

the current thermostat program, unless the

thermostat is in the HOLD mode. See

OPERATING YOUR THERMOSTAT.

13. I live in an area where daylight savings

time is observed. How do I change the

thermostat clock twice a year without

affecting thermostat programming?

To change your clock, follow the instruc-

tions for setting current time and day. See

ENTERING YOUR PROGRAM. Thermo-

stat programming is not affected when you

change the clock.

after seeing a flashing BATTERY on the

display, theinstalledbatteriesmaybedead.

If you remove the old batteries and install

fresh ones within one minute, you should

not lose your thermostat programming. Af-

terinstallingnewbatteries, followtheproce-

dures in CHECK YOUR PROGRAMMING

to determine whether your programming

was maintained. If the thermostat main-

SYSTEM

14. Do I have to reprogram my thermostat

after I change the batteries?

tainsprogramming,press

untilOFF

HEAT-OFF-COOL

is displayed, put the thermostat back on the

When the thermostat is on the wall and the

system has power, the thermostat is being

lost, or if the thermostat is removed from the

wall, the program will be retained for ap-

proximately one minute if there are no

batteriesinstalledoriftheinstalledbatteries

are dead. If you are changing the batteries

SYSTEM

HEAT-OFF-COOL

wall, press

to select the operating

RUN

mode you want, then press

to start

PRGM

program operation. If the program is lost,

reprogramthethermostat. SeePROGRAM-

MING YOUR THERMOSTAT.