Emerson 1F94-80 Operation Manual

OPERATION GUIDE

7 Day Multi-stage/Heat Pump
Electronic Digital Thermostat

1F94-80

WHITE-RODGERS

Operator: Save this booklet for future use!

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

DIGITAL COMFORT SET

II

2

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.

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.

3

PROGRAMMING YOUR

THERMOSTAT ................................... 19

PLANNING FOR YOUR NEEDS
ENTERING YOUR PROGRAM

Set Current Time and Day
Program Heating/Cooling

Temperatures
Enter Heating Program
Enter Cooling Program
Using the HOLD/COPY Button

CHECK YOUR PROGRAMMING

QUESTIONS AND ANSWERS................ 34

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

In This Guide . . .

Operator: Save this

booklet for future use!

4

• Computed Energy Management Recovery
(EMR)

• Automatic changeover (operator-selectable)

• Separate setback programming for 7 inde­pendent days

• Simultaneous heat and cool program stor­age

• Two separate time/temperature settings per
24-hour period (occupied and unoccupied)

• Armchair programming capability

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

• Damper control and programmable fan when
the occupied temperature is selected

• Backlit LCD displays continuous set point,
time, and room temperature

• 9 volt Energizer® alkaline battery backup

• Preprogrammed temperature control

• Adjustable cycle times

• Compressor short cycle protection

• Blower delay in the cooling cycle

• Audio and visual prompting during opera­tion

• Two hour temperature override

• Manual program override (HOLD tempera­ture)

• °F/°C convertibility

• Keypad lockout (operator-selectable)

• Temperature range 40° to 99°F

• Compatible with Remote Sensor (installer­selectable)

YOUR NEW THERMOSTAT’S FEATURES

5

OPERATING YOUR THERMOST AT

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 and
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 THER-
MOSTAT as this may damage the unit.

Before you begin programming your 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 new thermostat so that you can easily
program it.

Your thermostat consists of two parts: the ther-

mostat body and the subbase.

Use

SYSTEM

SWITCH

to turn thermostat to OFF

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

CAUTION

!

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.

1. The 9 volt Energizer® alkaline battery pro­vides power to the thermostat when the
24VAC 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 a week. If power loss is long enough
for the program to be lost, the thermostat will
automatically return to the factory pro­grammed temperatures (64°F heating and
82°F cooling) when power is restored. You

BACK OF THERMOSTAT BODY

Option switches 9-pin connector

4-pin connector

Battery

W18

must reprogram the thermostat if this hap­pens.

If the word BATTERY is flashing in the
display window, the battery is low and should
be replaced with a fresh 9 volt Energizer

®

7

alkaline battery. The battery will provide
power for all functions except the display
light, which works only on 24VAC power.

Use

SYSTEM

SWITCH

to turn thermostat to OFF

mode before removing thermostat from
the wall to replace the battery.

2. You may adjust the option switches for
energy management recovery and total key­pad lockout (see OPERATING FEA-
TURES).

CAUTION

!

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.

8

FAN AUTO is displayed during automatic
fan operation (when the blower cycles with
the heating or cooling system). PRG FAN is
displayed when the fan has been pro­grammed to run continuously during the
occupied program period.

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

The Display

Continuously displays system mode (HEAT,
EMER, OFF, COOL, AUTO, HLD). During

programming, the day of the week and the
period (occupied or unoccupied) are dis­played (MO O, TU O, WE U, etc.).

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).

During programming, when

VIEW
TEMP

is pressed,

the heating or cooling mode and period
currently being programmed are displayed
(HEAT O, COOL U, etc.)

Displays the setpoint temperature (this dis­play is blank in the AUTO mode).

1

2

4

5

3

9

SYSTEM

SWITCH

FAN

SWITCH

HEAT-EMER-OFF-COOL-AUTO

ON-AUTO

TIME
FWD

TIME

BACK

SET

CLOCK

ADV
DAY

VIEW

PRGM

VIEW

TEMP

HOLD
COPY

RUN

PRGM

SEVEN DAY DIGITAL COMFORT-SET

II

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

1 2 3

4

5

BATTERY

PRG FAN

2

3

4

EMER. PUMP

MALF. AUX.

FAN AUTOPRG FAN

10

Used with and to select setpoint
temperatures.

Used to manually override programming to
hold at a selected temperature (when HOLD
is displayed). Also used to copy one day’s
programming to another day (when COPY
is displayed).

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

(Red arrow) Raises temperature setting
(99°F or 37°C maximum).

(Blue arrow) Lowers temperature setting
(40°F or 4°C minimum).

EMER light indicates that the system is in
the emergency mode (the heat pump com­pressor is off and the auxiliary heat system
is maintaining the setpoint temperature).

The Thermostat Buttons

Sets the system mode (HEATing, OFF,
COOLing, or AUTOmatic changeover).

Selects fan operation (see #4, above).
Runs display forward or backward through

time, day, or anticipation settings during
programming.

Used with

TIME
FWD

and

TIME

BACK

to set current time

and day of the week.
Used during programming to set the day of

the week to be programmed.
Used to initiate or review programming (pro-

gram viewing automatically begins with
Monday’s program; use

ADV
DAY

button to view

programming for following days).

6

7

8

9

10

11

17

15

14

13

16

12

11

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.

MALF light indicates a heat pump system
malfunction (refer to heat pump
manufacturer's operating manual). A con­tinuous (non-flashing) PUMP light indicates

SYSTEM

SWITCH

FAN

SWITCH

HEAT-EMER-OFF-COOL-AUTO

ON-AUTO

TIME
FWD

TIME

BACK

SET

CLOCK

ADV
DAY

VIEW

PRGM

VIEW

TEMP

HOLD
COPY

RUN

PRGM

SEVEN DAY DIGITAL COMFORT-SET

II

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

FAN AUTO

9

10

11

12

13 14

15

16

8

6

7

17

EMER. PUMP

MALF. AUX.

12

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.

• 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.

This feature is enabled by option switch #3.
To enable the EMR function, you must
move option switch #3 (located on the back
of the thermostat body) to the ON position.

To do this, press

SYSTEM

SWITCH

until OFF is dis-

played. Remove the thermostat body from
the wall, turn it over, and check the position
of option switch #3. If the switch is ON (up),
simply put the thermostat back on the wall

and press

SYSTEM

SWITCH

until the desired operat-

ing mode is displayed. If the switch is OFF

13

screwdriver to move option switch #3 to the
OFF (down) position. Put the thermostat

back on the wall and press

SYSTEM

SWITCH

until the

desired operating mode is displayed.

• AUTOMATIC CHANGEOVER — You can
set the thermostat to automatically switch
the system from heating to cooling as
needed. To set the thermostat for automatic
changeover after programming, press

SYSTEM

SWITCH

to set the thermostat to AUTO (the

setpoint temperature display is blank in the
AUTO mode). The system will now auto­matically switch between heating and cool­ing, depending on the actual room tempera­ture.

In the AUTO mode, the thermostat will not
allow the temperature separation between

(down), use a pencil or small screwdriver to
move the switch to the ON position (see
figure below). Put the thermostat back on

the wall and press

SYSTEM

SWITCH

until the desired

operating mode is displayed.

EMR (ON)

Switch #1 set at installation (DO NOT CHANGE)
Switch #2 set at installation (DO NOT CHANGE)
Switch #3 ON
Switch #4 (see TOTAL KEYPAD LOCKOUT)

To disable EMR, press

SYSTEM

SWITCH

until OFF

is displayed. Remove the thermostat body
from the wall and use a pencil or small

ON

1234

14

79
78
77
76
75
74

COOLING TEMPERATURES

HEATING TEMPERATURES

DEAD BAND

the highest heat setting and the lowest cool
setting to be less than 1°F. For example, if
the highest heat setting is 76°F, the lowest
cool setting cannot be below 77°F (see
diagram below).

• 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.

We do not recommend using the temperature
override feature when the thermostat is in the

AUTO mode. If you press or in the
AUTO mode, the thermostat will revert to the

mode (heat or cool) in which it last cycled and will
prevent automatic switching for two hours. If you
do press or in the AUTO mode, you

may press

RUN

PRGM

to return to programmed opera-

tion in the AUTO mode.

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

the program. Press

HOLD
COPY

. HLD will be dis-

played. Then choose the desired hold tem­perature by pressing or . The

NOTE

15

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 COOLING
CYCLE TIMES (ANTICIPATION) — If the
heating/cooling system is turning on and off
too often (short cycles) or not often enough
(long cycles), you may want to adjust the
anticipation setting.

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

To adjust heat anticipation, press

SET

CLOCK

and

ADV
DAY

at the same time. The display will show

HEAT 18 (this is the factory preprogrammed
heating anticipation setting). You may se­lect any anticipation setting from 4 to 40
(note that for add-on heat pump sys-

tems, a minimum anticipation setting 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

CAUTION

!

16

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 cooling anticipation, press

SET

CLOCK

and

ADV
DAY

at the same time again. The display will

show COOL 14 (factory preprogrammed
cooling anticipation). Use the

TIME
FWD

and

TIME

BACK

buttons to adjust anticipation. Press

RUN

PRGM

to

return to your program.

• LOW BATTERY INDICATOR — The word
BATTERY 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 (this
feature works only when the thermostat is
attached to the wall and 24VAC power is
present to the thermostat).

• 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 24VAC power is
present to the thermostat).

• SYSTEM INDICATOR LIGHTS — The four
lights on the upper right part of the thermo­stat indicate system operation (see PARTS
OF THE THERMOSTAT).

• COMPRESSOR SHORT CYCLE PROTEC-
TION — To protect your compressor from
potential damage due to rapid cycling, this
thermostat has a built-in delay of 5 minutes

17

between heat pump heating and cooling
cycles. The following may cause a time
delay in COOL:

a) Return of power after a power outage.
b) Pressing

SYSTEM

SWITCH

to change operating

modes.

c) Pressing or , creating a call

for HEAT or COOL too soon after a
previous call.

• TOTAL KEYPAD LOCKOUT — When op-
tion switch #4 is in the total keypad lockout
position (ON), programs cannot be altered
and all buttons are disabled.

NOTE

ON

1234

Programming should be completed and bat­tery should be installed before changing op­tion switch #4.

TOTAL KEYPAD LOCKOUT (ON)

Switch #1 set at installation (DO NOT CHANGE)
Switch #2 set at installation (DO NOT CHANGE)
Switch #3 (see EMR)
Switch #4 ON

To enable total keypad lockout, press

SYSTEM

SWITCH

until OFF is displayed and remove

the thermostat body from the wall. Press

18

SYSTEM

SWITCH

until the desired operating mode

is displayed. Turn the thermostat body

over. Use a pencil or small screwdriver to
move option switch #4 to ON (see figure on
previous page). Replace the thermostat body
on the wall. After moving switch #4 to the

ON position, you will not be able to make
any changes to thermostat programming
or operation (all buttons will be disabled).

To disable total keypad lockout, move op­tion switch #4 to OFF.

19

Now you are ready to program your thermostat.
This section will help you plan your thermostat's
program 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

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

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?)

2a. What time does the building become va-

cant?

b. What temperature should the building be at

this time?

PROGRAMMING YOUR THERMOST AT

20

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, determine the heating and
cooling times and temperatures you want to
use. Use the following table to plan your pro-

gram time periods and temperatures. You may
also want to look at the sample program table to
get an idea of how the thermostat can be pro­grammed. You will select two heating tempera­tures (HEAT O for occupied temperature and
HEAT U for unoccupied temperature) and two
cooling temperatures (COOL O and COOL U).

To operate properly in the AUTO mode, the
highest heat temperature cannot be the same
as or higher than the lowest cool temperature (or
vice versa); see diagram below.

Heating Program for ALL days of the Week:

PERIOD TIME TEMP

Occupied (O)

Unoccupied (U)

8:00 AM
5:00 PM

70
64

FAN

PRG

AUTO

DAMPER

Open

Closed

FACTORY PREPROGRAMMING

Cooling Program for ALL days of the Week:

PERIOD TIME TEMP

Occupied (O)

Unoccupied (U)

8:00 AM
5:00 PM

78
82

FAN

PRG

AUTO

DAMPER

Open

Closed

NOTE

79
78
77
76
75
74

COOLING TEMPERATURES

HEATING TEMPERATURES

DEAD BAND

21

Heating Program

Occupied

Period

Start Time

Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday

Heating/Cooling Schedule Plan

Occupied

Heating

Temp.

Unoccupied

Period

Start Time

Unoccupied

Heating

Temp.

Occupied

Period

Start Time

Occupied

Cooling

Temp.

Unoccupied

Period

Start Time

Unoccupied

Cooling

Temp.

Cooling Program

NOTE: Fan and damper operation are linked to occupied or unoccupied temperature settings, not time periods. If

you program an unoccupied temperature during an occupied time period, the fan will operate in the AUTO
mode only and the damper will NOT open. We suggest programming occupied temperatures only during
occupied time periods, and unoccupied temperatures during unoccupied time periods.

22

Heating Program

Occupied

Period

Start Time

Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday

SAMPLE

Heating/Cooling Schedule Plan

Occupied

Heating

Temp.

Unoccupied

Period

Start Time

Unoccupied

Heating

Temp.

Occupied

Period

Start Time

Occupied

Cooling

Temp.

Unoccupied

Period

Start Time

Unoccupied

Cooling

Temp.

Cooling Program

NOTE: In the above sample program, the fan will be programmed to run continuously (PRG FAN) during periods

with occupied temperatures, and will be programmed for automatic cycling (FAN AUTO) during periods with
unoccupied temperatures. In your programming, you may choose automatic fan operation (FAN AUTO)
during both occupied and unoccupied periods (remember that fan and damper operation are linked to
temperature, not time periods).

Joe’s Restaurant

Open: Mon-Sat 10:00 AM to 9:30 PM
Sun 12:00PM to 6:00 PM

9:30 AM
9:30 AM
9:30 AM
9:30 AM
9:30 AM
9:30 AM

11:30 AM

73°F
73°F
73°F
73°F
73°F
73°F
73°F

10:00 PM
10:00 PM
10:00 PM
10:00 PM
10:00 PM
10:00 PM

6:30 PM

62°F
62°F
62°F
62°F
62°F
62°F
62°F

9:30 AM
9:30 AM
9:30 AM
9:30 AM
9:30 AM
9:30 AM

11:30 AM

74°F
74°F
74°F
74°F
74°F
74°F
74°F

10:00 PM
10:00 PM
10:00 PM
10:00 PM
10:00 PM
10:00 PM

6:30 PM

79°F
79°F
79°F
79°F
79°F
79°F
79°F

23

ENTERING YOUR PROGRAM

Follow these steps to enter the heating/cooling
program you have selected.

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 SYS-

TEM SWITCH IS SET TO OFF POSITION BE­FORE REATTACHING THERMOSTAT TO
SUBBASE!

You cannot program the thermostat with the
SYSTEM SWITCH in the AUTO position.

NOTE

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

CLOCK

once. The display will show the

day of the week as an abbreviation (MO for
Monday, TU for Tuesday, etc.).

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.

Program Heating/Cooling Temperatures

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 pro-

gramming after this happens, press

VIEW

PRGM

until

you are at the point where you stopped program­ming. Then you may continue to enter your
program normally. If you want to stop program-

ming at any time, simply press

RUN

PRGM

to resume

program operation.

1. Press

SYSTEM

SWITCH

until HEAT is displayed.

2. Press

VIEW

TEMP

once. The display will continue

to show HEAT. Beside HEAT is the letter O,
representing the occupied heating tempera­ture (HEAT O). At the right of the display is
the currently programmed HEAT O setting.

3. Press either or to change the
temperature to your selected HEAT O set­ting.

25

4. Press

VIEW
TEMP

once. The letter O will change to

the letter U, representing the unoccupied
heating temperature (HEAT U).

5. Press either or to change the
temperature to your selected HEAT U set­ting.

6. Press

RUN

PRGM

.

7. Press

SYSTEM

SWITCH

until COOL is displayed.

8. Press

VIEW
TEMP

once. The display will show

COOL and O, representing the first pro­grammed cooling temperature (COOL O).

9. Press either or to change the
temperature to your selected COOL O set­ting.

10. Press

VIEW

TEMP

once. Press or to

set your selected COOL U setting.

11. Press

RUN

PRGM

.

Enter Heating Program

1. Press

SYSTEM

SWITCH

until HEAT is displayed.

2. Press

VIEW

PRGM

once. MO, the abbreviation for

Monday, and the letter O, representing the
occupied heating period, will appear in the
display. Also displayed are the currently
programmed start time for the occupied
heating period and the currently programmed
HEAT O temperature.

EXAMPLE:

PRG FAN

26

This display window shows that for Monday’s
occupied heating period, the start time is
8:00 AM, 70° is the programmed tempera­ture, and the fan is set to PRG FAN (continu­ous fan operation); this example reflects
factory preprogramming, where 70° is the
HEAT O temperature.

3. To change the displayed start time to your
selected start time for Monday’s occupied

heating period, press

TIME

FWD

or

TIME

BACK

until your

selected time appears. The time will change
in 15 minute increments.

4. If the temperature displayed is not the heat­ing temperature you want for Monday’s oc­cupied period, press or (if you
continue to press or , the display

will alternate between the HEAT O and
HEAT U temperatures you previously se­lected).

The fan and damper operation are linked to the
occupied or unoccupied temperature selec­tions, not to the occupied or unoccupied time
periods. The programmable fan feature works
only during periods with occupied temperature
settings, and the damper will only operate dur­ing periods with occupied temperature settings.
Therefore, we suggest that you program occu­pied temperatures during occupied periods and
unoccupied temperatures during unoccupied
periods.

NOTE

27

5. If you want the fan to run continuously
during Monday’s occupied period, press

FAN

SWITCH

until PRG FAN is displayed (re-

member, this feature only works if you have
programmed an occupied temperature for
this period).

6. After selecting the desired heating tempera­ture for Monday’s occupied period, press

VIEW

PRGM

. The currently programmed start time

and heating temperature for Monday’s un­occupied heating period will be displayed.

7. Repeat steps 3 and 4 to select the start time
and heating temperature for Monday’s un­occupied heating period.

The thermostat has a built-in COPY feature.

This feature automatically copies the heat­ing and cooling programs you select for
Monday into Tuesday through Sunday’s pro­grams. If you want to have the same program-

ming every day, after you program Monday’s
schedule, you simply press

RUN

PRGM

to start the

thermostat’s programmed operation. Every day
will then use the same program you set for

Monday. You may also choose to use the

HOLD
COPY

button to copy any day’s heating and cooling
program into any other day’s program (see
USING THE HOLD/COPY BUTTON).

NOTE

28

8. To enter Tuesday’s through Sunday’s heat­ing programs, use the

HOLD
COPY

button (see

USING THE HOLD/COPY BUTTON), or
press

ADV
DAY

until the correct day’s abbrevia-

tion appears in the display. Repeat the
above steps to program each day’s heating
periods and temperatures.

9. When you have completed programming
your heating periods and temperatures,

press

RUN

PRGM

to begin program operation.

Enter Cooling Program

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 air condi­tioner operation during 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. BE SURE SYSTEM
SWITCH IS SET TO OFF POSITION BE­FORE REATTACHING THE THERMO­STAT TO THE SUBBASE!

1. Press

SYSTEM

SWITCH

until COOL is displayed.

2. Press

VIEW

PRGM

once. MO, the abbreviation for

Monday, and the letter O, representing the
occupied cooling period, will appear in the

CAUTION

!

29

display. Also displayed are the currently
programmed start time for the occupied
cooling period and the currently programmed
COOL O temperature.

3. To change the displayed start time to your
selected start time for Monday’s occupied

cooling period, press

TIME
FWD

or

TIME

BACK

until your

selected time appears. The time will change
in 15 minute increments.

4. If the temperature displayed is not the cool­ing temperature you want for Monday’s oc­cupied period, press or (if you
continue to press or , the display
will alternate between the COOL O and
COOL U temperatures you previously se­lected).

The fan and damper operation are linked to the
occupied or unoccupied temperature selec­tions, not to the occupied or unoccupied time
periods. The programmable fan feature works
only during periods with occupied temperature
settings, and the damper will only operate dur­ing periods with occupied temperature settings.
Therefore, we suggest that you program occu­pied temperatures during occupied periods and
unoccupied temperatures during unoccupied
periods.

5. If you want the fan to run continuously
during Monday’s occupied period, press

FAN

SWITCH

until PRG FAN is displayed (re-

member, this feature only works if you have

NOTE

30

programmed an occupied temperature for
this period).

6. After selecting the desired cooling tempera­ture for Monday’s occupied period, press

VIEW

PRGM

. The currently programmed start time

and cooling temperature for Monday’s un­occupied cooling period will be displayed.

7. Repeat steps 3 and 4 to select the start time
and cooling temperature for Monday’s un­occupied cooling period.

The thermostat has a built-in COPY feature.

This feature automatically copies the heat­ing and cooling programs you select for
Monday into Tuesday through Sunday’s pro­grams. If you want to have the same program-

ming every day, after you program Monday’s

schedule, you simply press

RUN

PRGM

to start the

thermostat’s programmed operation. Every day
will then use the same program you set for

Monday. You may also choose to use the

HOLD
COPY

button to copy any day’s heating and cooling
program into any other day’s program (see
USING THE HOLD/COPY BUTTON).

8. To enter Tuesday’s through Sunday’s cool­ing programs, use the

HOLD
COPY

button (see

USING THE HOLD/COPY BUTTON), or
press

ADV
DAY

until the correct day’s abbrevia-

tion appears in the display. Repeat the
above steps to program each day’s cooling
periods and temperatures.

NOTE

31

9. When you have completed programming
your cooling periods and temperatures,

press

RUN

PRGM

to begin program operation.

Using The HOLD/COPY Button

You can copy the entire heating/cooling pro­gram into any or all other days’ programs. How­ever, you must perform each copy function
separately. Each time you begin a COPY opera­tion, you must start with the day’s program you
wish to copy FROM. A COPY operation is not

complete until

HOLD
COPY

has been pressed TWICE.

For most efficient programming, you should
enter both the heating and cooling programs for
the day you wish to copy FROM before using the
COPY function, since the COPY function copies
the entire day’s programming to other days.

1. Press

VIEW

PRGM

.

2. Press

ADV
DAY

until the day you want to copy

FROM is displayed. If you have not com­pleted programming for this day, do so
before proceeding.

3. Press

HOLD

COPY

once. C (standing for COPY)

will appear on the display. A number from 1
to 7 will also appear, representing the day
you have selected to copy (Monday is 1,
Tuesday is 2, Wednesday is 3, etc.). For
example, if in step 2 you selected to copy
Wednesday’s program, when you press

HOLD
COPY

, C 3 will appear in the display (as
shown below).
EXAMPLE:

32

4. Press

ADV
DAY

to select the day you want to

copy the program TO.

5. Press

HOLD
COPY

. C will disappear from the dis-

play, and the display will show the copied
heating/cooling time and temperature for
the day you copied TO.

6. Repeat the above steps to copy any day’s
programming into any other day’s program.

7. Press

RUN

PRGM

to begin program operation.

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

times and temperatures for Monday.

3. Press

ADV
DAY

once to advance to Tuesday.

4. Press and hold

VIEW

PRGM

to view heating/cooling

periods and heating temperatures for Tues­day.

5. Repeat steps 3 and 4 to review all remain­ing days’ heating programming. If you find
an error in any day’s programming, go back
to the programming instructions to correct
the error.

6. Press

RUN

PRGM

.

7. Press

SYSTEM

SWITCH

until COOL is displayed.

33

8. Repeat steps 2 through 5 to check cooling
times and temperatures.

9. Press

RUN

PRGM

to begin program operation.

YOUR THERMOSTAT IS NOW COMPLETELY
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).

When you have completed programming, you
may set option switch #4 (see TOTAL KEYPAD
LOCKOUT in the OPERATING FEATURES
section).

34

1. How can I permanently change a part of
my program?

Press

VIEW

PRGM

and

ADV
DAY

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 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 want to stop

programming at this point, press

RUN

PRGM

to

start the normal program function. See PRO-

GRAMMING YOUR THERMOSTAT.

3. 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 five seconds. When
electricity is restored, the thermostat will
maintain a heating temperature of 64°F and

QUESTIONS AND ANSWERS

35

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

ING YOUR THERMOSTAT.

4. 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.

5. 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.

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 remove the battery for at least
two minutes. After reinstalling 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

un-

til OFF is displayed and replace the thermo­stat on the wall. Then press

RUN

PRGM

to begin

the factory preset program.

36

To prevent further static discharge prob­lems, touch another object to release static
build-up before touching the thermostat.
See OPERATING YOUR THERMOSTAT.

6. Why won’t the setpoint temperature go
to the temperature I want?

In the AUTO mode, the highest heating
setpoint temperature you select cannot be
the same as or higher 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, 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.

7. 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 24VAC power is present to the thermo­stat. See OPERATING YOUR THERMO-

STAT.

8. The display is flashing BATTERY. 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 OPER-

ATING YOUR THERMOSTAT.

9. 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

37

calling for heat or cool. If the compressor
lockout is active, the PUMP LED will flash.
Wait about 5 minutes for the compressor
lockout to expire. If the system is still not
running, read the cautionary statement be­low. Then, if conditions permit, use
or to move the temperature above or
below the setpoint temperature. See OP-

ERATING YOUR THERMOSTAT.

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 from
compressor operation during cold
weather.

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

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

• The EMR function is operating. The EMR

function will automatically turn on the
system early enough to bring the tem­perature to the selected level by the
beginning of the next program period.
See OPERATING YOUR THERMO-
STAT.

• 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.

CAUTION

!

38

See OPERATING YOUR THERMO-
STAT.

• If the PUMP LED is flashing, the com­pressor lockout feature is operating; wait
about 5 minutes for system to begin
running. See OPERATING YOUR

THERMOSTAT.

11. Why does the blower fan keep running
after the system has turned off?

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.

12. Why is the system turning on and off so
frequently (seldom)?

The anticipation setting is too low (high). To

change anticipation settings, see OPER-

ATING YOUR THERMOSTAT.

13. 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,
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 ther-

39

mostat is in the HOLD mode. See OPER-

ATING YOUR THERMOSTAT.

14. 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.

15. 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 24VAC 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 bat-

tery installed or if the installed battery is
dead. If you are changing the battery after
seeing a flashing BATTERY on the display,
the installed battery may be dead. If you
remove the old battery and install a fresh
one within one minute, you may 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 program-

ming, 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 programming is lost, you must
reprogram the thermostat. See PROGRAM-
MING YOUR THERMOSTAT.

R

Part No. 37-5186A

9329

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