White Rodgers 1F90W 71 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 .................................... 19

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................. 29

Operator: Save this

booklet for future use!

YOUR NEW THERMOSTAT’S FEATURES

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

• Compressor short cycle protection

• Programmable blower control

• Blower delay in the cooling cycle

• Audio and visual prompting during opera-

tion

• Two hour temperature override

• Manual program override (HOLD tempera-

ture)

end) setback programming

• Simultaneous heat and cool program stor-

age

• Fourseparatetime/temperaturesettingsper

24-hour period

• Computed Energy Management Recovery

(EMR)

• Automaticchangeover(operator-selectable)

• "Advance Program" key

• Armchair programming capability

• Backlit LCD displays continuous set point,

time, and room temperature

• 1.5 volt "AA" Energizer^®alkaline battery

backup

• °F/°C convertibility

• Keypad lockout and limited temperature

range (operator-selectable)

• Temperature range 40° to 99°F

• Compatible with Remote Sensor (installer-

selectable)

• Preprogrammed temperature control

• Adjustable cycle times

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 remov-

ing or attaching the thermostat body.

Equipment damage and/or personal in-

jury could occur.

THERMOSTAT

BODY

these, then gently pivot the thermostat body

down to connect the three pin connectors on the

lower portion of the thermostat back. Gently

push until the snap connectors engage. DO

NOT FORCE OR PRY THE THERMOSTAT, as

this may damage the unit.

programming). Fresh batteries will main-

tain the stored program for approximately a

year. If power loss is long enough for the

program to be lost, the thermostat will auto-

matically return to the factory programmed

temperatures (64°F heating and 82°F cool-

ing) when power is restored. You must

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" Ener-

gizer® alkaline batteries.

PARTS OF THE THERMOSTAT

The Back of The Thermostat Body

Turn the thermostat body over. On the back are

the 3 "AA" Energizer^®alkaline batteries and the

two option switch groups (A and B).

CAUTION

Before removing thermostat from the

wall to replace the batteries, remove

24vAC power from the thermostat at the

breaker/fuse box.

1. The "AA" Energizer^®alkaline batteries pro-

videpowertothethermostatwhenthe24vAC

powerisinterrupted(forexample, whenyou

remove the thermostat from the wall for

2. You may adjust the option switches for

keypad lockout, limited temperature range,

andautomaticchangeoverfromheattocool

(see OPERATING FEATURES).

Batteries

6-pin Connector

Other than

and

, the buttons are

locatedbehindthethermostatdoor. Toopenthe

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

it down on its hinges.

(Group A)

(Group B)

On the following pages there are brief descrip-

tions of the display and the thermostat buttons.

Option Switches

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, AUTO, HOLD). During pro-

gramming, the program period is displayed

(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-AUTO

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,

COOLing, or AUTOmatic changeover).

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 the

and

buttons to

BACK

set current time and day of the week.

(Red arrow) Raises temperature setting

(99°F or 37°C maximum).

Used during programming to set the day of

the week to be programmed. Also used in

(Blue arrow) Lowers temperature setting

(40°F or 4°C minimum).

SET

conjunction with the

button to enter

CLOCK

anticipation setting mode.

18 Theredindicatorlightglowswheneverheat-

ing, cooling, or fan are in operation.

17 16

DAY

FAN AUTO

TIME

FWD

SET

VIEW

HOLD

TEMP

SYSTEM

HEAT-OFF-COOL-AUTO

CLOCK

PRGM

TIME

SET

DAY

RUN

ADV

FAN

ON - AUTO

BACK

PRGM

11 12

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.

This feature is controlled by Group B option

switch#3. ToenabletheEMRfunction,first

you must move option switch #3 (located on

the back of the thermostat body) to the OFF

position, if it has not already been done. To

do this, turn off 24v AC power to the thermo-

stat. Then remove the thermostat body

from the wall. Check the position of switch

#3 (the last switch on the right). If it is OFF

(down), simply put the thermostat back on

the wall and restore 24v AC power. If the

switch is ON (up), remove the battery, then

• COMPUTED ENERGY MANAGEMENT

RECOVERY (EMR) — The thermostat’s

microcomputer can be set to automatically

calculate 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

use a pencil or small screwdriver to move

the switch to the OFF position (see figure

below). Leavethebatteryoutofthethermo-

stat for at least two minutes, to allow the

thermostattoresetitself. SeeAUTOMATIC

CHANGEOVER to determine proper posi-

tions of Group B option switches #1 and #2.

system from heating to cooling as needed.

(If you have a heating only system, Group B

option switch #1 should be OFF and option

switch #2 should be ON.) To enable auto-

matic changeover, you must move Group B

option switch #1 to the ON position and

switch #2 to the OFF position. Turn off 24v

AC power to the thermostat. Then remove

the thermostat body from the wall. Check

the position of Group B option switches #1

and #2 (the first two switches on the left). If

they are in the correct positions, simply put

the thermostat back on the wall and restore

24v AC power. If the switches are not

correctly positioned, remove the battery,

then use a pencil or small screwdriver to

move the switches to the correct positions

(seefigureonnextpage). Leavethebattery

out of the thermostat for at least two min-

EMR (ON)

Group B

Option

Switches

Switch #1 (see AUTOMATIC CHANGEOVER)

Switch #2 (see AUTOMATIC CHANGEOVER)

Switch #3 OFF

• AUTOMATIC CHANGEOVER — If you

have a heating/cooling system, you can set

the thermostat to automatically switch the

utes, to allow the thermostat to reset itself.

Replace the battery, reprogram the thermo-

NOTE

stat, if necessary, put the thermostat back In the AUTO mode, the thermostat will not allow

on the wall, and restore 24v AC power. To the temperature separation between the high-

setthethermostatforautomaticchangeover est heat setting and the lowest cool setting to be

less than 1°F. For example, if the highest heat

settingis75°F, thelowestcoolsettingcannotbe

below 77°F (see diagram below).

SYSTEM

HEAT-OFF-COOL-AUTO

after programming, press

to set the

thermostat to AUTO (the setpoint tempera-

ture display is blank in the AUTO mode).

The system will now automatically switch

betweenheatingandcooling,dependingon

the actual room temperature.

COOLING TEMPERATURES

76 DEAD BAND 1°F

HEATING TEMPERATURES

Automatic Changeover

For manual changeover, Group B option

switches #1 and #2 should be in the OFF

position.

Group B

Option

Switches

Switch #1 ON

Switch #2 OFF

Switch #3 (see Energy Management Recovery)

• TWO HOUR TEMPERATURE OVER-

RIDE — Press

until the

display shows the temperature you want.

The thermostat will override current pro-

gramming and keep the room temperature

at the selected temperature for two hours.

After two hours, the thermostat will auto-

matically revert to the program.

• "ADVANCE PROGRAM" KEY — Press

ADV

to change the thermostat to the next

PRGM

program period. This will temporarily over-

ride the program, until the next program

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.

• 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

to start program operation again.

PRGM

Thisfeatureisidealforenergyconservation

when the building is unoccupied for an ex-

tended period of time.

(long cycles), you may want to adjust the

anticipation setting.

the adjustment is sufficient. If the heat

TIME

cyclesaretooshort,press

toincrease

FWD

CAUTION

the cycle time. If the heat cycles are too

TIME

A cooling anticipation setting of less than

10maycausedecreasedcompressorlife.

long, press

to decrease the cycle

BACK

time. To set cooling anticipation, press

SET

DAY

and

at the same time again.

SET

CLOCK

To adjust heat anticipation, press

CLOCK

The display will show COOL 14 (factory

preprogrammed cooling anticipation). You

may select any anticipation setting from 4 to

SET

and

atthesametime. Thedisplaywill

DAY

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

TIME

FWD

TIME

40. Use the

and

buttons to

to return

BACK

RUN

PRGM

adjust anticipation. Press

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.

cause a time delay in COOL:

a) Return of power after a power outage.

SYSTEM

HEAT-OFF-COOL-AUTO

b) Pressing

to change operating

modes.

c) Pressing

• 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).

• 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

, creating a call for COOL

too soon after a previous call.

• TOTAL KEYPAD LOCKOUT — When

Group A option switch #1 is in the total

keypad lockout position (ON), programs

cannot be altered and all buttons are dis-

abled.

NOTE

Programming should be completed and batter-

ies should be installed before changing Group

A option switches #1 or #2.

peratures. To enable limited temperature

range, move Group A switch #1 to the OFF

position and switch #2 to the ON position

(see figure below). To disable limited tem-

perature range, move switch #2 to the OFF

position (see TOTAL KEYPAD LOCKOUT

to determine the correct position of option

switch #1).

Total Keypad Lockout

Group A

Option

Switches

Switch #1 ON

Switch #2 OFF

Toenabletotalkeypadlockout,moveGroup

Aoptionswitch#1toON(seefigureabove).

To disable total keypad lockout, move op-

tion switch #1 to OFF.

• LIMITED TEMPERATURE RANGE —

When Group A option switch #1 is in the

OFF position and option switch #2 is in the

ON position, the heating and cooling tem-

peratures may be changed using the

NOTE

Programming should be completed and batter-

ies should be installed before changing Group

A option switches #1 or #2.

Limited Temperature Range

Group A

Option

Switches

and

buttons, but the temperatures

maynotbesettoexceedanyprogrammed

maximum heating or minimum cooling tem-

Switch #1 OFF

Switch #2 ON

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. What time does the building become va-

cant?

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

night?

b. What temperature should the house be at

this time? These will be your NHT (night)

temperature settings.

NOTE

To operate properly in the AUTO mode, there

must be a minimum 1°F separation between

the highest heat temperature and the lowest

cool temperature (see diagram below).

Now look at the factory preprogrammed times

and temperatures shown on the following page.

If this program will suit your needs, simply press

RUN

COOLING TEMPERATURES

to begin running the factory preset pro-

PRGM

76 DEAD BAND 1°F

gram.

HEATING TEMPERATURES

If you want to change the preprogrammed times

and temperatures, do the following.

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

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

weekday and weekend programs (for example,

youmayselect5:00AMand70° astheweekday

MOR heating start time and temperature, and

choose 7:00 AM and 76° as the weekday MOR

cooling start time and temperature). Use the

following table to plan your program time peri-

ods,andthetemperaturesyouwantduringeach

period. You may also want to look at the sample

program table to get an idea of how the thermo-

stat 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

entering cooling programming). Fresh "AA"

Energizer^®alkaline batteries must be installed

to perform off-wall programming. BE SURE

SYSTEM SWITCH IS SET TO OFF POSITION

BEFORE REATTACHING THERMOSTAT TO

SUBBASE!

NOTE

You cannot program the thermostat with the

SYSTEM SWITCH in the AUTO position.

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

Set Current Time and Day

SET

DAY

5. Press

once. Thedisplaywillshowthe

day of the week as an abbreviation (MO for

Monday, TU for Tuesday, etc.).

SET

1. Press

once. The display will show

CLOCK

minutes only.

EXAMPLE:

TIME

FWD

TIME

6. Press and hold either

until

BACK

you reach the current day of the week.

TIME

FWD

TIME

RUN

2. Press and hold either

until

BACK

7. Press

once. Thedisplaywillshowthe

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

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).

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).

VIEW

until you are at the point where you

PRGM

stopped programming. Then you may continue

to enter your programs normally. If you want to

stop programming at any time, simply press

RUN

to resume program operation.

3. To change the displayed start time to your

PRGM

selected start time for weekday MOR heat

TIME

FWD

TIME

SYSTEM

HEAT-OFF-COOL-AUTO

program, press

until your

BACK

1. Press

2. Press

until HEAT is displayed.

selectedtimeappears. Thetimewillchange

in 15 minute increments.

VIEW

once. 5 DAY (indicating week-

PRGM

4. Press

until you reach your

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.

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

Enter Cooling Program

VIEW

6. Press

. The currently programmed

PRGM

starttimeandheatingtemperatureforweek-

day DAY will be displayed.

CAUTION

7. Repeat steps 3 through 5 to select the start

time and heating temperature for the week-

day DAY program.

8. Repeat steps 3 through 7 for the weekday

EVE and NHT heating programs.

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

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!

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

heating program, press

PRGM

RUN

SYSTEM

HEAT-OFF-COOL-AUTO

1. Press

until COOL appears.

3. Press

4. Press

PRGM

2. Followtheprocedureforenteringyourheat-

ing program, using your selected cooling

times and temperatures.

SYSTEM

HEAT-OFF-COOL-AUTO

until COOL is displayed.

5. Repeat step 2 to check cooling tempera-

tures.

RUN

CHECK YOUR PROGRAMMING

6. Press

to begin program operation.

PRGM

Follow these steps to check your thermostat

programming one final time before beginning

thermostat operation.

YOURTHERMOSTATISNOWCOMPLETELY

PROGRAMMEDANDREADYTOAUTOMATI-

CALLYPROVIDEMAXIMUMCOMFORTAND

EFFICIENCY!

SYSTEM

1. Press

until HEAT is displayed.

HEAT-OFF-COOL-AUTO

SYSTEM

HEAT-OFF-COOL-AUTO

VIEW

Press

until OFF is displayed. Reattach

2. Press and hold

to view the heating

PRGM

thermostat to subbase. Turn on power to the

period times and temperatures in sequence

for weekday, then weekend MOR, DAY,

EVE, and NHT program periods.

SYSTEM

HEAT-OFF-COOL-AUTO

system. Thenpress

toselecttheopera-

tion mode you want (HEAT, COOL, AUTO).

FAN

ON – AUTO

Press

until FAN AUTO is displayed

(automatic cycling).

QUESTIONS AND ANSWERS

1. How can I permanently change a part of

my program?

you may select the same weekday EVE

cooling temperature as you did for weekday

DAY, which means the temperature will not

change when the EVE period begins. See

PROGRAMMING YOUR THERMOSTAT.

VIEW

Press

until you reach the time/tem-

PRGM

perature schedule you want. Then press

TIME

FWD

TIME

3. How can I finish my programming if the

display has already changed to time/

temperature?

and

BACK

change the program. See PROGRAM-

MING YOUR THERMOSTAT.

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

2. How can I have no change in tempera-

ture from one time period to another?

Simply select the same temperature for

eachconsecutivetimeperiod. Forexample,

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.

VIEW

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

5. Why can’t I program the thermostat in

the AUTO mode?

PRGM

start the normal program function. See

The thermostat can only be programmed in

the HEAT and COOL modes. See PRO-

GRAMMING YOUR THERMOSTAT.

PROGRAMMING YOUR THERMOSTAT.

4. What happens if the electricity goes off

or is manually shut off?

6. What can cause the thermostat display

to freeze or go blank?

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.

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.

Setpoint temperature will not be displayed.

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

SYSTEM

To prevent further static discharge prob-

lems, touch another object to release static

build-up before touching the thermostat.

See OPERATING YOUR THERMOSTAT.

7. Why won’t the setpoint temperature go

to the temperature I want?

In the AUTO mode, the highest heating

setpoint temperature you select must be at

least 1°F lower than the lowest cooling

setpoint temperature you select (for ex-

ample, if 70°F is your lowest selected cool-

ing temperature, you cannot select a heat-

ing temperature any higher than 68°F). If

such a conflict exists, you must set the

lowest cooling temperature higher in order

to set the heating temperature higher. To

set a lower cooling temperature, you must

select a lower heating temperature. See

PROGRAMMING YOUR THERMOSTAT.

the thermostat immediately, press

HEAT-OFF-COOL-AUTO

until OFF is displayed and replace the ther-

RUN

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. The display is flashing BATTERY. What

does this mean?

callingforcool. Waitabout5minutesforthe

compressor lockout to expire. If the system

isstillnotrunning,readthecautionarystate-

ment below. Then, if conditions permit,

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.

9. The display shows a continuous (non-

flashing) BATTERY. What does this

mean?

CAUTION

If the outside temperature is below 50°F,

DONOTusethe buttontomovethe

temperaturebelowthesetpointtempera-

ture. Property damage may result due to

compressor slugging.

The thermostat is not being supplied with

24vAC power. The thermostat is operating

on battery power alone. See OPERATING

YOUR THERMOSTAT.

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

though the thermostat display is func-

tioning normally?

11. Why doesn’t the temperature change at

the time I programmed?

Either the compressor lockout feature is in

operation or the thermostat is not currently

There may be a number of causes for this

situation. The following are primary rea-

sons.

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.

See OPERATING YOUR THERMO-

STAT.

12. 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

PROGRAMMING YOUR THERMO-

STAT.

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.

•

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

•

13. Why is the system turning on and off so

frequently (seldom)?

Press

to start program operation.

PRGM

See OPERATING YOUR THERMO-

STAT.

The compressor lockout feature is oper-

The anticipation setting is too low (high). To

change anticipation settings, see OPER-

ATING YOUR THERMOSTAT.

14. Between heating and cooling seasons, I 15. I live in an area where daylight savings

want to turn my system off. Can I do this

without affecting my thermostat pro-

gramming?

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.

Any time you wish to turn your system off,

SYSTEM

HEAT-OFF-COOL-AUTO

simplypress

untilthedisplayshows

OFF. This will not affect your thermostat’s

programming in any way. To turn the sys-

SYSTEM

tem back on, press

until HEAT,

16. Do I have to reprogram my thermostat

after I change the batteries?

HEAT-OFF-COOL-AUTO

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.

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

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

HEAT-OFF-COOL-AUTO

tainsprogramming,press

untilOFF

is displayed, put the thermostat back on the

SYSTEM

HEAT-OFF-COOL-AUTO

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.