White Rodgers 1F92-71 Thermostat User manual

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OPERATION GUIDE

Multi-stage/Heat Pump Electronic

Digital Thermostat

1F92-71

WHITE-RODGERS

Operator: Save this booklet for future use!

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.

2

In This Guide . . .

YOUR NEW THERMOSTAT’S

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

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

PARTS OF THE THERMOSTAT

The Back Of the Thermostat Body

The Display

The Thermostat Buttons

OPERATING FEATURES

PROGRAMMING YOUR

THERMOSTAT ................................... 18

PLANNING FOR YOUR NEEDS

ENTERING YOUR PROGRAM

Set Current Time and Day

Enter Heating Program

Enter Cooling Program

CHECK YOUR PROGRAMMING

QUESTIONS AND ANSWERS ............... 29

Operator: Save this booklet for future use!

3

YOUR NEW THERMOSTAT’S FEATURES

4

• Computed Energy Management Recovery (EMR)

• Automatic changeover (operator selectable)

• Five-day/two-day programming capability

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

• Two hour temperature override

• Manual program override (HOLD temperature)

• “Advance Program” button

• Simultaneous heat and cool program storage

• Four separate time and temperature settings per 24-hour period

• Armchair programming capability

• Backlit LCD displays continuous setpoint, time, and room temperature

• 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 operation

• Programmable blower control

• Temperature range 40

°

to 99

°

F

°

F/

°

C convertibility

• Compatible with optional Remote Sensor

• Electric Heat (installer-selectable)

OPERATING YOUR THERMOSTAT

Before you begin programming your new thermostat, you should be familiar with its features and with the display and the location and operation of the thermostat buttons. The information in this section will help you become familiar with your thermostat so that you can easily program it.

Your thermostat consists of two parts: the

thermostat body and the subbase.

!

CAUTION

Use

SYSTEM

SWITCH

to turn thermostat OFF before removing or attaching the thermostat body. Equipment damage and/ or personal injury could occur.

The subbase is attached to the wall, but you can remove the thermostat body for easy programming. To remove the thermostat body from the subbase, grasp the thermostat body and gently pull it out from the bottom of the subbase, then pivot up. To attach the thermostat 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 down to connect the nine 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.

5

6

PARTS OF THE THERMOSTAT

The Back of the Thermostat Body

Turn the thermostat body over. On the back are the 9 volt Energizer

®

alkaline battery and the option switches.

!

CAUTION

Use

SYSTEM

SWITCH

to turn thermostat OFF before removing thermostat from the wall to replace the battery.

4-pin connector

Battery

Option switches 9-pin connector

BACK OF THERMOSTAT BODY

1.

The 9 volt Energizer ® alkaline battery provides 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 approximately one week. If power loss is long enough for the program to be lost, the thermostat will automatically maintain a factory preprogrammed heating temperature 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 light and audio prompting, which work only on 24 VAC power.

2.

You may adjust option switch #4 for automatic changeover from heating to cooling

(see OPERATING FEATURES).

7

Other than and , the buttons are located behind the thermostat door. To open the door, use your fingernail in the indentation at the top center of the door. Pull the door out, then swing the door down on its hinges.

Following are brief descriptions of the display and the thermostat buttons.

The Display

1 Continuously displays system mode

(HEAT, EMER, OFF, COOL, AUTO,

HOLD). During programming, the program period is displayed (MOR, DAY, EVE,

NHT).

8

2 Alternately displays room temperature (F denotes degrees Fahrenheit and C denotes degrees Celsius) and time of day (A denotes AM time and P denotes PM time).

3 Displays the setpoint temperature.

4 5 DAY indicates that the displayed program is the weekday program. 2 DAY indicates that the displayed program is the weekend program.

5 The word BAT flashes on the display when the 9 volt alkaline battery is weak and should be replaced.

6

FAN is displayed when the blower is operating continuously, regardless of heating or cooling system cycling. FAN is displayed during automatic fan operation

(when the blower cycles with the heating or cooling system).

1

5 DAY FAN

EMER.

PUMP

MALF.

AUX.

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

SYSTEM

SWITCH

HEAT/OFF/COOL/AUTO

FAN

SWITCH

ON /AUTO

DIGITAL MULTI-STAGE COMFORT-SET

II

TIME

FWD

SET

CLOCK

VIEW

PRGM

HOLD

TEMP

TIME

BACK

SET

DAY

RUN

PRGM

ADV

PRGM

2 3 3

2 DAY FAN

4 6

5 DAY BAT FAN

4 5

6 2

9

The Thermostat Buttons and Lights

7 Sets the system mode (HEATing,

EMERgency backup system, OFF,

COOLing, or AUTOmatic changeover [user selectable feature]).

8 Selects fan operation (see #6, above). This button is also used to program the fan to run continuously during a program period.

9

Runs display forward or backward through time, day, or anticipation settings during programming.

10 Used with

TIME

FWD

and TIME

BACK

to set current time and day of the week.

11 Used during programming to set the day of

10 the week. Also used with SET

CLOCK

to enter anticipation setting mode.

12 Used to initiate or review thermostat programming.

13 Used to start program operation after programming. Also used to return thermostat to program operation after being in HOLD mode.

14 Used to manually override programming to hold at a selected temperature (when

HOLD is displayed).

15 Used to advance thermostat program to the next program period (for example, from the MOR program to the DAY program).

16 (Blue arrow) Lowers temperature setting

(40

°

F or 4

°

C minimum).

17 (Red arrow) Raises temperature setting

(99

°

F or 37

°

C maximum)

18 EMER light indicates that the system is in the emergency mode (the heat pump compressor 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

7

8 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.

16 17 18

5 DAY FAN

EMER.

PUMP

MALF.

AUX.

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

SYSTEM

SWITCH

HEAT/OFF/COOL/AUTO

FAN

SWITCH

ON /AUTO

DIGITAL MULTI-STAGE COMFORT-SET II

TIME

FWD

SET

CLOCK

VIEW

PRGM

HOLD

TEMP

TIME

BACK

SET

DAY

RUN

PRGM

ADV

PRGM

9 10 11 12 13 14 15

11

OPERATING FEATURES

Now that you are familiar with the thermostat display and buttons, read the following information to learn about the many features of the thermostat.

12

COMPUTED ENERGY MANAGEMENT

RECOVERY (EMR) - The thermostat’s microcomputer automatically calculates the time it will take to change the temperature to the next program setting. Then the thermostat will activate the heating or cooling system to change the temperature so that the desired temperature is reached at the beginning of the next program period.

As an example of this feature, assume that you have programmed your thermostat to provide an overnight heating 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 temperature is reached by about 6:00 AM.

AUTOMATIC CHANGEOVER — You can set the thermostat to automatically switch the system from heating to cooling as needed. First, you must move option switch

#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 operation. Replace the battery, reprogram the thermostat if necessary, put the thermostat back on the wall, and restore

24 VAC power. To set the thermostat for automatic changeover after programming, press

SYSTEM

SWITCH

to set the thermostat to

AUTO (the setpoint display is blank in the

AUTO mode). The system will now automatically switch between heating and cooling depending on the actual room temperature.

Automatic Changeover (ON)

ON

1 2 3 4

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 highest heat setting is 76

°

F, the lowest cool setting cannot be below 77

°

F (see diagram below).

79

78

77

76

75

74

COOLING TEMPERATURES

DEAD BAND 1

°

F

HEATING TEMPERATURES

13

14

TWO HOUR TEMPERATURE OVER-

RIDE — Press or until the display shows the temperature you want.

The thermostat will override current programming and keep the room temperature at the selected temperature for two hours.

After two hours, the thermostat will automatically revert to the program.

HOLD TEMPERATURE — The thermostat can hold any temperature within its range for an indefinite period, without reverting to the program. Press HOLD

TEMP

. HOLD will be displayed. Then choose the desired hold temperature by pressing or

. The thermostat will hold the room temperature at the selected setting until you press RUN

PRGM

to start program operation again. This feature is ideal for energy conservation when the building is unoccupied for an extended period of time.

°

F/

°

C CONVERTIBILITY — Press

TIME

FWD and

TIME

BACK

at the same time until the temperature 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.

!

CAUTION

A cooling anticipation setting of less than 10 may cause decreased compressor life.

To adjust HEAT anticipation, press SET

CLOCK and SET

DAY

at the same time. The display will show HEAT 18. You may select any anticipation setting from 4 to 40 (note that for

add-on heat pump systems, a minimum

anticipation of 10 is recommended).

Whenever adjusting anticipation, 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, press TIME

FWD

to increase the cycle time. If the heat cycles are too long, press

TIME

BACK

to decrease the cycle time. To set COOL anticipation, press SET

CLOCK

and SET

DAY

at the same time again. The display will show

COOL 14 (factory preprogrammed cooling anticipation). Use TIME

FWD

and TIME

BACK

to adjust anticipation. To set AUXILIARY heat anticipation (not applicable to multistage use), press SET

CLOCK

and SET

DAY

at the same time again. The display will show

AUX 8 (factory preprogrammed auxiliary anticipation). Use TIME

FWD

and TIME

BACK

to adjust anticipation. Press RUN

PRGM

to return to your program.

15

LOW BATTERY INDICATOR — The word

BAT will flash on the display if the 9 volt alkaline battery is low and should be replaced.

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 (this feature works only when the thermostat is attached to the wall and 24 VAC power is present to the thermostat).

16

COMPRESSOR SHORT CYCLE PRO-

TECTION — 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 blower will operate during a time delay, but the air circulated will not be cooled. The following may cause a time delay in COOL or HEAT: a) Return of power after a momentary power outage.

b) Pressing modes.

SYSTEM

SWITCH

to change operating 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 operation will be delayed.

Auxiliary heat is functional during the compressor lockout and can be used as needed 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 one hour less than the power loss (up to 12 hours). When power is restored to the system, heaters in the system will begin to heat the crankcase oils. The thermostat’s time delay will lock out the compressor to prevent its operation until the compressor oil is sufficiently warmed. During the lockout time period, the auxiliary heating system will operate to maintain setpoint temperature.

For example, if a power outage of three hours occurs, the compressor will be locked out for two hours.

SYSTEM INDICATOR LIGHTS — The four lights on the upper right part of the thermostat indicate system operation (see

PARTS OF THE THERMOSTAT for specific descriptions of what each light indicates).

PROGRAMMABLE BLOWER CON-

TROL — You may program the fan blower to run continuously during any given program period, regardless of the cycling of the heating or cooling system. During programming, after entering the time and temperature for the time period, press

FAN

SWITCH until FAN is displayed. To override constant fan, press until FAN is displayed.

17

PROGRAMMING YOUR THERMOSTAT

Now you are ready to program your thermostat. This section will help you plan and program your thermostat to meet your needs.

For maximum comfort and efficiency, keep the following guidelines in mind when planning your program.

• When heating (cooling) your building, program the temperatures to be cooler

(warmer) when the building is vacant or during periods of low activity.

• During early morning hours, the need for cooling is usually minimal.

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 through Friday, and the two-day program is set 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).

First, you should answer the following questions to help you decide what your needs are.

If you are using the thermostat for a commercial application (a store, office building, etc.),

18

answer questions 1 through 4. If you are using the thermostat in your home, answer questions 5 through 8. Keep in mind that you should plan for both weekday and weekend programs.

FOR COMMERCIAL APPLICATIONS:

1a. What time does the first person arrive at the building in the morning?

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 a maximum activity level (using lights, equipment, meeting rooms, etc.)?

b. What temperature should the building be at this time? These will be your DAY temperature settings.

3a. What time do the building occupants reach a minimum activity level (limited personnel in building)? These will be your EVE

(evening) temperature settings.

b. What temperature should the building be at this time?

4a. What time does the building become vacant?

b. What temperature should the building be at this time? These will be your NHT (night) temperature settings.

IN YOUR HOME:

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

b. What temperature should the house be at this time? These will be your MOR (morning) temperature settings.

19

6a. What time does the last person leave the house in the morning?

b. What temperature should the house be at this time? These will be your DAY temperature settings.

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

b. What temperature should the house be at this time? These will be your EVE (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.

Now look at the factory preprogrammed times and temperatures shown below. If this program will suit your needs, simply press

RUN

PRGM

to begin running the factory preset program.

If you want to change the preprogrammed times and temperatures, do the following.

FACTORY PREPROGRAMMING

Heating Program for ALL days of the Week:

PERIOD

MOR

DAY

EVE

NHT

TIME

5:00 AM

9:00 AM

4:00 PM

10:00 PM

TEMP

70

70

70

64

Cooling Program for ALL Days of the Week:

PERIOD

MOR

DAY

EVE

NHT

TIME

5:00 AM

9:00 AM

4:00 PM

10:00 PM

TEMP

78

82

78

78

20

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).

79

78

77

76

75

74

COOLING TEMPERATURES

DEAD BAND 1

°

F

HEATING TEMPERATURES for both weekday and weekend programs (for example, you may select 5:00 AM and 70

°

as the weekday 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 periods, and the temperatures 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.

Determine the time periods and heating and cooling temperatures for your weekday program. You must program 4 periods for each day (MOR, DAY, EVE, and NHT). However, you may use the same heating and cooling temperatures for consecutive time periods.

You can choose start times, heating temperatures, and cooling temperatures independently

21

22

MOR HEAT

DAY HEAT

EVE HEAT

NHT HEAT

MOR COOL

DAY COOL

EVE COOL

NHT COOL

Heating/Cooling Schedule Plan

WEEKDAY (5 DAY)

Start

Time Temperature

WEEKEND (2 DAY)

Start

Time Temperature

MOR HEAT

DAY HEAT

EVE HEAT

NHT HEAT

MOR COOL

DAY COOL

EVE COOL

NHT COOL

SAMPLE

Heating/Cooling Schedule Plan

WEEKDAY (5 DAY)

WEEKEND (2 DAY)

Start

Time

Start

Time

5:30 AM

8:00 AM

4:30 PM

11:00 PM

8:00 AM

12:00 PM

4:30 PM

11:00 PM

Temperature

68

°

66

°

70

°

66

°

76

°

78

°

74

°

78

°

7:30 AM

2:00 PM

6:00 PM

12:00 AM

8:00 AM

2:00 PM

6:00 PM

12:00 AM

Temperature

68

°

70

°

70

°

66

°

76

°

74

°

74

°

78

°

23

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). A fresh 9 volt Energizer ® alkaline battery must be installed to perform off-wall programming. BE

SURE SYSTEM SWITCH IS SET TO OFF

POSITION BEFORE REATTACHING THER-

MOSTAT TO SUBBASE!

You cannot program the thermostat with the

SYSTEM SWITCH in the AUTO position.

Set Current Time and Day

1.

Press SET

CLOCK

once. The display will show minutes only.

EXAMPLE:

2.

Press and hold either TIME

FWD

or TIME

BACK

until you reach the correct minutes.

3.

Press

SET

CLOCK

once. The display window will show the hour only.

EXAMPLE:

4.

Press and hold either

TIME

FWD

or TIME

BACK

until you reach the correct hour and AM/PM designation (AM begins at midnight; PM begins at noon).

24

5.

Press SET

DAY

once. The display will show the day of the week as an abbreviation (MO for

Monday, TU for Tuesday, etc.).

VIEW

PRGM

until you are at the point where you stopped programming. Then you may continue to enter your programs normally. If you want to stop programming at any time, simply press RUN

PRGM

to resume program operation.

6.

Press and hold either

TIME

FWD

or

TIME

BACK

until you reach the current day of the week.

7.

Press RUN

PRGM

once. The display will show the correct time and room temperature alternately.

1.

Press

SYSTEM

SWITCH

until HEAT is displayed.

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 resume programming after this happens, press

2.

Press VIEW

PRGM

once. 5 DAY (indicating weekday 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 temperature.

EXAMPLE:

5 DAY

25

This display window shows that for the weekday MOR period, the start time is

5:00 AM, and 70

°

is the programmed temperature (this example reflects factory preprogramming).

3.

To change the displayed start time to your selected start time for weekday MOR heat program, press

TIME

FWD

or

TIME

BACK

until your selected time is displayed. The time will change in 15 minute increments.

4.

Press or until you reach your selected weekday MOR heating temperature.

5.

If you want the fan to run continuously during this period, press

FAN is displayed.

FAN

SWITCH

until

26

6.

Press VIEW

PRGM

. The currently programmed start time and heating temperature for weekday DAY will be displayed.

7.

Repeat steps 3 through 5 to select the start time and heating temperature for the weekday DAY program.

8.

Repeat steps 3 through 7 for the weekday

EVE and NHT heating programs.

9.

After entering your weekday heating program, repeat steps 1 through 8 for your weekend 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 heating program, press RUN

PRGM

.

Enter Cooling Program

!

CAUTION

If outside temperature is below 50

°

F, we recommend that you remove the thermostat from the wall before proceeding with the following steps to program cooling temperatures. Personal injury or property damage may occur due to compressor operation in cold weather. A fresh 9 volt Energizer ® alkaline battery must be installed to perform off-wall programming. Programming away from the wall should prevent accidental compressor operation.

USE

SYSTEM

SWITCH

TO TURN THERMOSTAT

OFF BEFORE REATTACHING THE

THERMOSTAT TO THE SUBBASE!

1.

Press

SYSTEM

SWITCH

until COOL is displayed.

2.

Follow the same procedure used to enter your heating program, using your chosen cooling times and temperatures.

CHECK YOUR PROGRAMMING

Follow these steps to check your thermostat programming one final time before beginning thermostat operation.

1.

Press

SYSTEM

SWITCH

until HEAT is displayed.

2.

Press and hold VIEW

PRGM

to view the heating period times and temperatures in sequence for weekday, then weekend MOR, DAY,

EVE, and NHT program periods.

27

3.

Press RUN

PRGM

.

4.

Press

SYSTEM

SWITCH

until COOL is displayed.

5.

Repeat step 2 to check cooling temperatures.

6.

Press RUN

PRGM

to begin program operation.

YOUR THERMOSTAT IS NOW COM-

PLETELY PROGRAMMED AND READY TO

AUTOMATICALLY PROVIDE MAXIMUM

COMFORT AND EFFICIENCY!

Press

SYSTEM

SWITCH

until OFF is displayed. Reattach thermostat to subbase. Then press

SYSTEM

SWITCH

to select the operation mode you want (HEAT, COOL, AUTO). Press

FAN

SWITCH until FAN is displayed (automatic cycling).

28

QUESTIONS AND ANSWERS

1.

How can I permanently change a part of my program?

Press VIEW

PRGM

until you reach the time/temperature schedule you want. Then press

or and TIME

FWD

and TIME

BACK

to change the program. See PROGRAMMING YOUR

THERMOSTAT.

2.

How can I have no change in temperature from one time period to another?

Simply select the same temperature for each consecutive time period. For example, 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.

3.

How can I finish my programming if the display has already changed to time/ temperature?

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 resume programming, press

VIEW

PRGM

until you return to the point where you stopped programming. Then you may continue to program the thermostat normally. If you

29

want to stop programming at this point, press RUN

PRGM

to start the normal program function. See PROGRAMMING YOUR

THERMOSTAT.

4.

What happens if the electricity goes off or is manually shut off?

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 temperature of 64

°

F and a cooling temperature of 82

°

F until you reenter your program. Setpoint temperature will not be displayed.

If a fresh 9 volt Energizer

®

alkaline battery is installed, the program will be maintained

30 for about one week with no 24 VAC power present to the thermostat. See OPERAT-

ING YOUR THERMOSTAT.

5.

Why can’t I program the thermostat in the AUTO mode?

The thermostat can only be programmed in the HEAT and COOL modes. See PRO-

GRAMMING YOUR THERMOSTAT.

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. However, if there is power to the thermostat and the display is blank or frozen, static discharge is probably the cause.

During periods of low humidity (especially during cold weather), you may feel or see a spark discharge when you touch the thermostat. This may cause the program to be lost or the 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 immediately, press

SYSTEM

SWITCH

until OFF is displayed and replace the thermostat on the wall.

Then press RUN

PRGM

to begin the factory preset program. Or you may reprogram the thermostat, then replace it on the wall.

To prevent further static discharge problems, 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 example, if 70

°

F is your lowest selected cooling temperature, you cannot select a heating temperature any higher than 69

°

F).

If such a conflict exists, you must set the lowest cooling temperature higher in order to set the heating temperature higher. To set a lower cooling temperature, you must select a lower heating temperature. See

PROGRAMMING YOUR THERMOSTAT.

31

8.

Why doesn’t the display light come on when I press a button? Why don’t I hear a beep when I press a button?

The display light and audio prompting

(beep) only work when the thermostat is on the wall and 24 VAC power is present to the thermostat. These features will not work on battery power alone. See OPER-

ATING YOUR THERMOSTAT.

9.

The display is flashing BAT. What does this mean?

The 9 volt battery installed in the thermostat is low and should be replaced with a fresh 9 volt Energizer ® alkaline battery.

See OPERATING YOUR THERMOSTAT.

10. Why won’t the system turn on, even though the thermostat display is functioning normally?

Either the compressor lockout feature is in operation or the thermostat is not currently calling for heat or cool. Wait about 5 minutes 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 or buttons to move the temperature above or below the setpoint temperature.

See OPERATING YOUR THERMOSTAT.

32

!

CAUTION

If the outside temperature is below 50

°

F,

DO NOT use the button to move the temperature below the setpoint temperature. Property damage may result due to compressor operation in cold weather.

11. Why doesn’t the temperature change at the time I programmed?

There may be a number of causes for this situation. The following are primary reasons.

• 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.

• 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.

Press

RUN

PRGM

to start program operation.

See OPERATING YOUR THERMO-

STAT.

• The compressor lockout feature is operating; wait about 5 minutes for system to begin running. See OPERAT-

ING YOUR THERMOSTAT.

33

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.

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.

14. Between heating and cooling seasons,

I want to turn my system off. Can I do this without affecting my thermostat programming?

Any time you wish to turn your system off, simply press

SYSTEM

SWITCH

until the display shows OFF. This will not affect your thermostat’s programming in any way. To turn the system back on, press

SYSTEM

SWITCH until HEAT, 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 THER-

MOSTAT.

34

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?

To change your clock, follow the instructions for setting current time and day. See

ENTERING YOUR PROGRAM. Thermostat programming is not affected when you change the clock.

16. Do I have to reprogram my thermostat after I change the battery?

When the thermostat is on the wall and the system has power, the thermostat is being powered by a 24 VAC source. If power is lost, or if the thermostat is removed from the wall, the program will be retained for approximately one minute if there is no battery installed or if the installed battery is dead. If you are changing the battery after seeing a flashing BAT on the display, the installed battery may be dead. If you remove the old battery and install a fresh one within one minute, you should not lose your thermostat programming. After installing a new battery, follow the procedures in CHECK YOUR PROGRAMMING to determine whether your programming was maintained. If the thermostat maintains programming, press

SYSTEM

SWITCH

until

OFF is displayed, put the thermostat back on the wall, press

SYSTEM

SWITCH

to select the operating mode you want, then press RUN

PRGM to start program operation. If the program is lost, reprogram the thermostat. See

PROGRAMMING YOUR THERMOSTAT.

35

If you need further information on programming or operation, you may write to our Technical Service Department at the address shown below.

WHITE-RODGERS DIVISION

EMERSON ELECTRIC CO.

9797 REAVIS ROAD

ST. LOUIS, MISSOURI 63123-5398

Part No. 37-4741C

Replaces 37-4741B

9606

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Frequently Answers and Questions

What is Computed Energy Management Recovery (EMR)?
EMR is a feature that automatically calculates the time needed to reach the next programmed temperature and activates the heating or cooling system accordingly.
How do I set the thermostat for automatic changeover between heating and cooling?
Move option switch #4 on the back of the thermostat body to the 'ON' position, set the thermostat to 'AUTO' mode, and reprogram the thermostat if necessary.
What does the EMER light indicate?
The EMER light indicates that the system is in emergency mode, with the heat pump compressor off and the auxiliary system maintaining the setpoint temperature.
What does the MALF light indicate?
The MALF light indicates a heat pump system malfunction. Refer to the heat pump manufacturer's operating manual for more information.
What happens if the battery gets low?
When the battery is low, the 'BAT' symbol will flash on the display. Replace the battery with a fresh 9-volt Energizer® alkaline battery.

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