White Rodgers 1F92 71 Thermostat User Manual

About Your New Thermostat . . .

Your new Digital COMFORT SET II Multi-stage/Heat Pump Thermostat uses the technology of

a solid-state microcomputer to provide precise time/temperature control. The COMFORT SET

II 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, you may write to our Technical Service Department at the address shown on

the back cover of this booklet.

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 ................................... 18

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

• Computed Energy Management Recov-

• Backlit LCD displays continuous setpoint,

ery (EMR)

time, and room temperature

• Automatic changeover (operator select-

able)

• Five-day/two-day programming capability

• Up to 3 stages of heat and up to 2 stages

of cool

• Two hour temperature override

• Manualprogramoverride(HOLDtempera-

ture)

• Adjustable cycle times

• 9 volt Energizer^®alkaline battery backup

• Compressor long term cycle protection

• Compressor short cycle protection

• Blower delay in the cooling cycle

• Preprogrammed temperature control

• Audio and visual prompting during opera-

tion

• “Advance Program” button

• Simultaneous heat and cool program stor-

age

• Four separate time and temperature set-

tings per 24-hour period

• Programmable blower control

• Temperature range 40° to 99°F

• °F/°C convertibility

• Compatible with optional Remote Sensor

• Electric Heat (installer-selectable)

• Armchair programming capability

OPERATING YOUR THERMOSTAT

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

mostat, you should be familiar with its features can remove the thermostat body for easy pro-

and with the display and the location and gramming. To remove the thermostat body

operation of the thermostat buttons. The infor- from the subbase, grasp the thermostat body

mation in this section will help you become and gently pull it out from the bottom of the

familiar with your thermostat so that you can subbase, then pivot up. To attach the thermo-

easily program it.

stat body, line up the four terminal pins on the

upper section of the thermostat back with the

matching connector on the subbase. Insert

these, then gently pivot the thermostat body

downtoconnecttheninepinconnectorsonthe

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.

Your thermostat consists of two parts: the

thermostat body and the subbase.

CAUTION

SYSTEM

SWITCH

Use

to turn thermostat OFF

before removing or attaching the ther-

mostat body. Equipment damage and/

or personal injury could occur.

4-pin connector

PARTS OF THE THERMOSTAT

Battery

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.

CAUTION

SYSTEM

SWITCH

Use

to turn thermostat OFF

before removing thermostat from the

wall to replace the battery.

Option switches

9-pin connector

BACK OF THERMOSTAT BODY

1. The 9 volt Energizer^®alkaline battery pro-

vides power to the thermostat when the

24 VAC power is interrupted (for example,

when you remove the thermostat from the

wall for programming). A fresh battery will

maintain the stored program for approxi-

mately one week. If power loss is long

enough for the program to be lost, the

thermostat will automatically maintain a

factory preprogrammed heating tempera-

ture of 64°F and a cooling temperature of

82°F after power is restored. You must

reprogram the thermostat if this happens.

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 except the display

lightandaudioprompting, whichworkonly

on 24 VAC power.

2. You may adjust option switch #4 for auto-

matic changeover from heating to cooling

(see OPERATING FEATURES).

Other than

and

, the buttons are

Displays the setpoint temperature.

located behind the thermostat door. To open

the door, use your fingernail in the indentation

at the top center of the door. Pull the door out,

then swing the door down on its hinges.

5 DAY indicates that the displayed pro-

gram is the weekday program. 2 DAY

indicates that the displayed program is the

weekend program.

Following are brief descriptions of the display

and the thermostat buttons.

ThewordBATflashesonthedisplaywhen

the 9 volt alkaline battery is weak and

should be replaced.

The Display

FAN

operatingcontinuously,regardlessofheat-

ing or cooling system cycling. FAN is

is displayed when the blower is

Continuously displays system mode

(HEAT, EMER, OFF, COOL, AUTO,

HOLD).Duringprogramming,theprogram

period is displayed (MOR, DAY, EVE,

NHT).

displayed during automatic fan operation

(when the blower cycles with the heating

or cooling system).

Alternately displays room temperature (F

denotes degrees Fahrenheit and C de-

notes degrees Celsius) and time of day (A

denotes AM time and P denotes PM time).

EMER. PUMP

MALF. AUX.

DAY

FAN

W H I T E - R O D G E R S

DIGITAL MULTI-STAGE COMFORT-SET II

TIME

FWD

SET

CLOCK

VIEW

PRGM

HOLD

TEMP

SYSTEM

SWITCH

HEAT/OFF/COOL/AUTO

FAN

SWITCH

TIME

BACK

SET

DAY

RUN

PRGM

ADV

PRGM

/AUTO

DAY

FAN

DAY

BAT

FAN

The Thermostat Buttons and Lights

Used to initiate or review thermostat pro-

gramming.

Sets the system mode (HEATing,

EMERgency backup system, OFF,

COOLing,orAUTOmaticchangeover[user

selectable feature]).

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 hold at a selected temperature (when

HOLD is displayed).

Runsdisplayforwardorbackwardthrough

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 pro-

gram).

TIME

FWD

TIME

Used with

and

to set current time

BACK

and day of the week.

(Blue arrow) Lowers temperature setting

(40°F or 4°C minimum).

Usedduringprogrammingtosetthedayof

SET

the week. Also used with

anticipation setting mode.

to enter

CLOCK

(Red arrow) Raises temperature setting

(99°F or 37°C maximum)

heat pump manufacturer’s operating

manual). A continuous (non-flashing)

PUMP light indicates that the heat pump

compressor is functioning — a flashing

PUMP light indicates that the compressor

is locked out. AUX light indicates that the

auxiliary system is operating.

EMER light indicates that the system is in

theemergencymode(theheatpumpcom-

pressor is off and the auxiliary system is

maintaining setpoint temperature — there

is a 5 to 10 minute startup delay on the first

emergency cycle). MALF light indicates a

heat pump system malfunction (refer to

16 17

EMER. PUMP

MALF. AUX.

DAY

FAN

DIGITAL MULTI-STAGE COMFORT-SET

W H I T E - R O D G E R S

TIME

FWD

SET

CLOCK

VIEW

PRGM

HOLD

TEMP

SYSTEM

SWITCH

HEAT/OFF/COOL/AUTO

FAN

SWITCH

TIME

BACK

SET

DAY

RUN

PRGM

ADV

PRGM

/AUTO

12 13 14 15

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 temperature is

reached by about 6:00 AM.

OPERATING FEATURES

Now that you are familiar with the thermostat

display and buttons, read the following infor-

mation to learn about the many features of the

thermostat.

• COMPUTED ENERGY MANAGEMENT

RECOVERY (EMR) - The thermostat’s

microcomputer automatically calculates

the time it will take to change the tempera-

ture to the next program setting. Then the

thermostatwillactivatetheheatingorcool-

ing system to change the temperature so

that the desired temperature is reached at

the beginning of the next program period.

Asanexampleofthisfeature, assumethat

you have programmed your thermostat to

provide an overnight heating temperature

of 62°F, and that during the next program

• AUTOMATICCHANGEOVER—Youcan

set the thermostat to automatically switch

the system from heating to cooling as

needed.First,youmustmoveoptionswitch

#4 (located on the back of the thermostat

body) to the ON position, if it has not

already been done. To do this, turn off

24 VAC power to the thermostat. 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 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 op-

eration. Replace the battery, reprogram

the thermostat if necessary, put the ther-

mostat back on the wall, and restore

24 VAC power. To set the thermostat for

automaticchangeoverafterprogramming,

Automatic Changeover (ON)

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

In the AUTO mode, the thermostat will not

allow the temperature separation between

the highest heat setting and the lowest cool

setting to be less that 1°F. For example, if the

SYSTEM

press

to set the thermostat to highest heat setting is 76°F, the lowest cool

setting cannot be below 77°F (see diagram

SWITCH

AUTO (the setpoint display is blank in the

AUTO mode). The system will now auto-

maticallyswitchbetweenheatingandcool-

ing depending on the actual room tem-

perature.

below).

COOLING TEMPERATURES

DEAD BAND 1°F

HEATING TEMPERATURES

• TWO HOUR TEMPERATURE OVER-

RIDE — Press or until the

RUN

you press

to start program operation

PRGM

again. This feature is ideal for energy

conservation when the building is unoccu-

pied for an extended period of time.

display shows the temperature you want.

The thermostat will override current pro-

grammingandkeeptheroomtemperature

at the selected temperature for two hours.

After two hours, the thermostat will auto-

matically revert to the program.

TIME

• °F/°C CONVERTIBILITY — Press

FWD

TIME

and

at the same time until the tem-

BACK

• HOLD TEMPERATURE — The thermo-

stat can hold any temperature within its

range for an indefinite period, without re-

perature display is in °C (Celsius). To

display °F, repeat the process.

• ADJUSTABLE HEATING AND COOL-

ING 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.

HOLD

verting to the program. Press

. HOLD

TEMP

willbedisplayed. Thenchoosethedesired

hold temperature by pressing or

. The thermostat will hold the room

temperature at the selected setting until

TIME

CAUTION

heat cycles are too long, press

BACK

A cooling anticipation setting of less

than 10 may cause decreased com-

pressor life.

decrease the cycle time. To set COOL

SET

DAY

anticipation, press

and

at the

CLOCK

same time again. The display will show

COOL 14 (factory preprogrammed cool-

SET

CLOCK

To adjust HEAT anticipation, press

TIME

FWD

TIME

SET

ing anticipation). Use

and

BACK

and

at the same time. The display will

DAY

adjust anticipation. To set AUXILIARY

heat anticipation (not applicable to multi-

showHEAT18. Youmayselectanyantici-

pation setting from 4 to 40 (note that for

add-onheatpumpsystems,aminimum

anticipation of 10 is recommended).

Wheneveradjustinganticipation,increase

or decrease the displayed 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 cycles are too short,

SET

DAY

stage use), press

and

at the

CLOCK

same time again. The display will show

AUX 8 (factory preprogrammed auxiliary

TIME

FWD

TIME

anticipation). Use

and

to adjust

BACK

RUN

PRGM

anticipation. Press

program.

to return to your

TIME

press

to increase the cycle time. If the

FWD

• LOWBATTERYINDICATOR—Theword

BAT will flash on the display if the 9 volt

alkaline battery is low and should be re-

placed.

following may cause a time delay inCOOL

or HEAT:

a) Return of power after a momentary

power outage.

• AUDIO PROMPTING — Each time you

press a button, the thermostat will beep.

SYSTEM

SWITCH

b) Pressing

modes.

to change operating

• BACKLIT DISPLAY — When you press

any button on the thermostat, the display

is lit for approximately eight seconds (this

feature works only when the thermostat is

attached to the wall and 24 VAC power is

present to the thermostat).

c) Pressing

or to create a call

for COOL or HEAT too soon after a

previous call.

During lockout in the HEAT mode, the

green compressor (PUMP) LED will flash.

During lockout in the COOL mode, the

blower will operate, but compressor op-

eration will be delayed.

• COMPRESSOR SHORT CYCLE PRO-

TECTION — To protect your compressor

from potential damage due to rapid cy-

cling, thisthermostathasabuilt-indelayof

5 minutes between cooling cycles. The

blowerwilloperateduringatimedelay, but

the air circulated will not be cooled. The

Auxiliaryheatisfunctionalduringthecom-

pressorlockoutandcanbeusedasneeded

to maintain room temperature.

• COMPRESSOR LONG TERM CYCLE

PROTECTION — If your system begins to

operate too soon after an extended power

outage, the compressor may be damaged

due to crankcase oil temperature change.

This thermostat has a built-in time delay of

onehourlessthanthepowerloss(upto12

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 compressor to

prevent its operation until the compressor

oil is sufficiently warmed. During the lock-

out time period, the auxiliary heating sys-

tem will operate to maintain setpoint tem-

perature.

• SYSTEM INDICATOR LIGHTS — The

four lights on the upper right part of the

thermostatindicatesystemoperation(see

PARTS OF THE THERMOSTAT for spe-

cific descriptions of what each light indi-

cates).

• PROGRAMMABLE BLOWER CON-

TROL — You may program the fan blower

to run continuously during any given pro-

gram period, regardless of the cycling of

the heating or cooling system. During pro-

gramming,afterenteringthetimeandtem-

FAN

SWITCH

peratureforthetimeperiod,press

until FAN is displayed. To override con-

stant fan, press until FAN is displayed.

For example, if a power outage of three

hoursoccurs,thecompressorwillbelocked

out for two hours.

PROGRAMMING YOUR THERMOSTAT

Now you are ready to program your thermo-

stat. This section will help you plan and pro-

gram your thermostat to meet your needs.

PLANNING FOR YOUR NEEDS

This thermostat will store separate heating

and cooling programs for five-day (weekday)

and two-day (weekend) operation. Usually,

the five-day program is set to run Monday

throughFriday, andthetwo-dayprogramisset

to run Saturday and Sunday. However, you

may choose any five consecutive days to be

your weekday program days (such as Sunday

through Thursday; in this case, your weekend

program would run on Friday and Saturday).

For maximum comfort and efficiency, keep the

following guidelines in mind when planning

your program.

• When heating (cooling) your building, pro-

gram the temperatures to be cooler

(warmer) when the building is vacant or

during periods of low activity.

• During early morning hours, the need for

cooling is usually minimal.

First, you should answer the following ques-

tions to help you decide what your needs are.

If you are using the thermostat for a commer-

cial application (a store, office building, etc.),

answer questions 1 through 4. If you are using 3a. Whattimedothebuildingoccupantsreach

the thermostat in your home, answer ques-

tions 5 through 8. Keep in mind that you should

planforbothweekdayandweekendprograms.

aminimumactivitylevel(limitedpersonnel

in building)? These will be your EVE

(evening) temperature settings.

b. What temperature should the building be

at this time?

FOR COMMERCIAL APPLICATIONS:

1a. What time does the first person arrive at

the building in the morning?

4a. What time does the building become

vacant?

b. What temperature should the building be

at this time? (heating? cooling?) These

will be your MOR (morning) temperature

settings.

b. What temperature should the building be

atthistime?ThesewillbeyourNHT(night)

temperature settings.

IN YOUR HOME:

2a. Whattimedothebuildingoccupantsreach

a maximum activity level (using lights,

equipment, meeting rooms, etc.)?

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

the morning?

b. What temperature should the building be

at this time? These will be your DAY tem-

perature settings.

b. What temperature should the house be at

this time? These will be your MOR (morn-

ing) temperature settings.

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 NHT (night)

temperature settings.

b. What temperature should the house be at

this time? These will be your DAY tem- Now look at the factory preprogrammed times

perature settings.

and temperatures shown below. If this pro-

RUN

7a. What time does the first person arrive

home in the evening?

gram will suit your needs, simply press

PRGM

begin running the factory preset program.

b. What temperature should the house be at

thistime?ThesewillbeyourEVE(evening)

temperature settings.

If you want to change the preprogrammed

times and temperatures, do the following.

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

at night?

FACTORY PREPROGRAMMING

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

for both weekday and weekend programs (for

example, you may select 5:00 AM and 70° as

NOTE

To operate properly in the AUTO mode, there the weekday MOR heating start time and

must be a minimum 1°F separation between temperature, and choose 7:00 AM and 76° as

the highest heat temperature and the lowest the weekday MOR cooling start time and

cool temperature (see diagram below).

temperature). Use the following table to plan

your program time periods, and the tempera-

tures you want during each period. You may

also want to look at the sample program table

to get an idea of how the thermostat can be

programmed.

COOLING TEMPERATURES

DEAD BAND 1°F

HEATING TEMPERATURES

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 may use the same heating and cooling

temperatures for consecutive time periods.

You can choose start times, heating tempera-

tures,andcoolingtemperaturesindependently

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°

7:30 AM

2:00 PM

6:00 PM

12:00 AM

8:00 AM

2:00 PM

6:00 PM

12:00 AM

68°

8:00 AM

4:30 PM

11:00 PM

8:00 AM

12:00 PM

4:30 PM

11:00 PM

66°

70°

66°

76°

78°

74°

78°

70°

66°

76°

74°

78°

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.

NOTE

EXAMPLE:

We recommend that you remove the thermo-

stat from the wall for programming (especially

for entering cooling programming). A fresh 9

volt Energizer^®alkaline battery must be in-

stalled to perform off-wall programming. BE

SURE SYSTEM SWITCH IS SET TO OFF

POSITION BEFORE REATTACHING THER-

MOSTAT TO SUBBASE!

TIME

FWD

TIME

2. Press and hold either

until you

BACK

reach the correct minutes.

SET

3. Press

once. The display window will

CLOCK

show the hour only.

EXAMPLE:

TIME

FWD

TIME

You cannot program the thermostat with the

SYSTEM SWITCH in the AUTO position.

4. Press and hold either

until you

BACK

reach the correct hour and AM/PM desig-

nation (AM begins at midnight; PM begins

at noon).

SET

DAY

VIEW

5. Press

once. The display will show the

until you are at the point where you

PRGM

dayoftheweekasanabbreviation(MOfor

Monday, TU for Tuesday, etc.).

stopped programming. Then you may con-

tinue to enter your programs normally. If you

want to stop programming at any time, simply

TIME

FWD

TIME

6. Press and hold either

until you

BACK

RUN

press

to resume program operation.

PRGM

reach the current day of the week.

SYSTEM

SWITCH

RUN

7. Press

once. The display will show the 1. Press

until HEAT is displayed.

PRGM

correct time and room temperature alter-

nately.

VIEW

2. Press

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 pro-

grammed temperature.

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

EXAMPLE:

5 DAY

This display window shows that for the

weekday MOR period, the start time is

5:00 AM, and 70° is the programmed tem-

perature(thisexamplereflectsfactorypre-

programming).

VIEW

6. Press

. The currently programmed

PRGM

start time and heating temperature for

weekday DAY will be displayed.

7. Repeatsteps3through5toselectthestart

timeandheatingtemperaturefortheweek-

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

TIME

FWD

TIME

program, press

until your

BACK

EVE and NHT heating programs.

selected time is displayed. The time will

change in 15 minute increments.

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).

4. Press

until you reach your

selectedweekdayMORheatingtempera-

ture.

10. When you have completed entering your

5. If you want the fan to run continuously

RUN

FAN

SWITCH

heating program, press

during this period, press

until

PRGM

FAN is displayed.

Enter Cooling Program

SYSTEM

SWITCH

1. Press

until COOL is displayed.

CAUTION

2. Follow the same procedure used to enter

your heating program, using your chosen

cooling times and temperatures.

If outside temperature is below 50°F,

we recommend that you remove the

thermostat from the wall before pro-

ceedingwiththefollowingstepstopro-

gram cooling temperatures. Personal

injury or property damage may occur

due to compressor operation in cold

weather. A fresh 9 volt Energizer^®alka-

line battery must be installed to per-

form off-wall programming. Program-

ming away from the wall should pre-

vent accidental compressor operation.

CHECK YOUR PROGRAMMING

Follow these steps to check your thermostat

programming one final time before beginning

thermostat operation.

SYSTEM

SWITCH

1. Press

until HEAT is displayed.

VIEW

2. Press and hold

to view the heating

PRGM

SYSTEM

SWITCH

periodtimesandtemperaturesinsequence

for weekday, then weekend MOR, DAY,

EVE, and NHT program periods.

USE

TO TURN THERMOSTAT

OFF BEFORE REATTACHING THE

THERMOSTAT TO THE SUBBASE!

RUN

SYSTEM

SWITCH

3. Press

4. Press

Press

until OFF is displayed. Reat-

PRGM

tach thermostat to subbase. Then press

SYSTEM

SWITCH

until COOL is displayed.

SYSTEM

SWITCH

to select the operation mode you

5. Repeat step 2 to check cooling tempera-

tures.

FAN

SWITCH

want (HEAT, COOL, AUTO). Press

RUN

until FAN is displayed (automatic cycling).

6. Press

to begin program operation.

PRGM

YOUR THERMOSTAT IS NOW COM-

PLETELY PROGRAMMED AND READY TO

AUTOMATICALLY PROVIDE MAXIMUM

COMFORT AND EFFICIENCY!

QUESTIONS AND ANSWERS

1. How can I permanently change a part of

will not change when the EVE period be-

gins. See PROGRAMMING YOUR

THERMOSTAT.

my program?

VIEW

Press

until you reach the time/tem-

PRGM

3. How can I finish my programming if the

display has already changed to time/

temperature?

perature schedule you want. Then press

TIME

FWD

TIME

and

tochange

BACK

During programming, if no buttons are

pressed for five minutes, the thermostat

will enter the HOLD mode and maintain a

constant temperature. The display will

change to the time/temperature mode. To

theprogram.SeePROGRAMMINGYOUR

THERMOSTAT.

2. How can I have no change in tempera-

ture from one time period to another?

VIEW

Simply select the same temperature for

eachconsecutivetimeperiod.Forexample,

you may select the same weekday EVE

cooling temperature as you did for week-

day DAY, which means the temperature

resume programming, press

until you

PRGM

return to the point where you stopped

programming. Then you may continue to

program the thermostat normally. If you

want to stop programming at this point,

for about one week with no 24 VAC power

present to the thermostat. See OPERAT-

ING YOUR THERMOSTAT.

RUN

press

to start the normal program

PRGM

function. See PROGRAMMING YOUR

THERMOSTAT.

5. Why can’t I program the thermostat in

the AUTO mode?

4. What happens if the electricity goes off

or is manually shut off?

The thermostat can only be programmed

intheHEATand COOLmodes. SeePRO-

GRAMMING YOUR THERMOSTAT.

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 electricity is restored, the

thermostat will maintain a heating tem-

perature of 64°F and a cooling tempera-

ture of 82°F until you reenter your pro-

gram. Setpoint temperature will not be

displayed.

6. What can cause the thermostat display

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

discharge is probably the cause.

If a fresh 9 volt Energizer^®alkaline battery

isinstalled, theprogramwillbemaintained

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 thermostat to display

incorrectly. To correct this, remove the

thermostat from the wall and disconnect

the battery. Wait about one minute, then

reconnect the battery. The thermostat will

revert to the factory preset program until

you reprogram the thermostat. If you don’t

want to reprogram the thermostat immedi-

To prevent further static discharge prob-

lems,touchanotherobjecttoreleasestatic

build-up before touching the thermostat.

SeeOPERATINGYOURTHERMOSTAT.

7. Why won’t the setpoint temperature go

to the temperature I want?

In the AUTO mode, the highest heating

setpointtemperatureyouselectmustbeat

least 1°F lower than the lowest cooling

setpoint temperature you select (for ex-

ample, if 70°F is your lowest selected

cooling temperature, you cannot select a

heatingtemperatureanyhigherthan69°F).

If such a conflict exists, you must set the

lowestcoolingtemperaturehigherinorder

to set the heating temperature higher. To

set a lower cooling temperature, you must

select a lower heating temperature. See

PROGRAMMINGYOURTHERMOSTAT.

SYSTEM

SWITCH

ately,press

untilOFFisdisplayed

and replace the thermostat on the wall.

RUN

Thenpress

tobeginthefactorypreset

PRGM

program. Or you may reprogram the ther-

mostat, then replace it on the wall.

8. Why doesn’t the display light come on 10. Why won’t the system turn on, even

when I press a button? Why don’t I hear

a beep when I press a button?

though the thermostat display is func-

tioning normally?

The display light and audio prompting

(beep) only work when the thermostat is

onthewalland24VACpowerispresentto

the thermostat. These features will not

work on battery power alone. See OPER-

ATING YOUR THERMOSTAT.

Either the compressor lockout feature is in

operationorthethermostatisnotcurrently

calling for heat or cool. Wait about 5 min-

utes for the compressor lockout to expire.

If the system is still not running, read the

cautionary statement on the next page.

Then, if conditions permit, use the

9. The display is flashing BAT. What does

this mean?

buttons to move the temperature

above or below the setpoint temperature.

SeeOPERATINGYOURTHERMOSTAT.

The 9 volt battery installed in the thermo-

stat is low and should be replaced with a

fresh 9 volt Energizer^®alkaline battery.

SeeOPERATINGYOURTHERMOSTAT.

•

You have programmed the incorrect

day or time. Check your programming

(besurethatthetimesyouprogrammed

arecorrectAMorPMtimes). SeePRO-

GRAMMING YOUR THERMOSTAT.

CAUTION

Iftheoutsidetemperatureisbelow50°F,

DO NOT use the button to move

thetemperaturebelowthesetpointtem-

perature. Property damage may result

due to compressor operation in cold

weather.

The thermostat is in the HOLD mode.

RUN

Press

to start program operation.

PRGM

See OPERATING YOUR THERMO-

STAT.

11. Whydoesn’tthetemperaturechangeat

the time I programmed?

The compressor lockout feature is op-

erating; wait about 5 minutes for sys-

tem to begin running. See OPERAT-

ING YOUR THERMOSTAT.

There may be a number of causes for this

situation.Thefollowingareprimaryreasons.

•

The EMR function is operating. The

EMR function will bring the system on

automatically to bring the temperature

to the selected level by the beginning of

the next program period. See OPER-

ATING YOUR THERMOSTAT.

12. Why does the blower fan keep running 14. Between heating and cooling seasons,

after the system has turned off?

I want to turn my system off. Can I do

this without affecting my thermostat

programming?

•

You have programmed the fan to run

continuously during this period. See

PROGRAMMING YOUR THERMO-

STAT.

Any time you wish to turn your system off,

SYSTEM

SWITCH

simply press

until the display

•

The blower delay feature is operating.

This energy saving feature continues

toblowconditionedairthroughtheducts

after the system has turned off, rather

than letting the air dissipate.

shows OFF. This will not affect your

thermostat’s programming in any way. To

SYSTEM

SWITCH

turn the system back on, press

until HEAT, COOL, etc. is displayed. The

system will automatically begin operating

according to the current thermostat pro-

gram,unlessthethermostatisintheHOLD

mode. See OPERATING YOUR THER-

MOSTAT.

13. Why is the system turning on and off so

frequently (seldom)?

The anticipation setting is too low (high).

To change anticipation settings, see OP-

ERATING YOUR THERMOSTAT.

15. 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?

seeing a flashing BAT on the display, the

installed battery may be dead. If you re-

movetheoldbatteryandinstallafreshone

within one minute, you should not lose

your thermostat programming. After in-

stalling a new battery, follow the proce-

duresinCHECKYOURPROGRAMMING

to determine whether your programming

was maintained. If the thermostat main-

To change your clock, follow the instruc-

tions for setting current time and day. See

ENTERING YOUR PROGRAM. Thermo-

statprogrammingisnotaffectedwhenyou

change the clock.

SYSTEM

SWITCH

16. Do I have to reprogram my thermostat

after I change the battery?

tains programming, press

until

OFF is displayed, put the thermostat back

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

approximately one minute if there is no

batteryinstalledoriftheinstalledbatteryis

dead. If you are changing the battery after

SYSTEM

SWITCH

on the wall, press

to select the

RUN

operating mode you want, then press

PRGM

to start program operation. If the program

is lost, reprogram the thermostat. See

PROGRAMMINGYOURTHERMOSTAT.