1F92-71 - Emerson Climate Technologies

OPERATION GUIDE
1F92-71
Multi-stage/Heat Pump Electronic
Digital Thermostat
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
• 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
4
• 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
PARTS OF THE THERMOSTAT
4-pin connector
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
Use
SYSTEM
SWITCH
to turn thermostat OFF
before removing thermostat from the
wall to replace the battery.
6
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).
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).
8
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.
is displayed when the blower is
6 FAN
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).
EMER.
PUMP
MALF.
AUX.
FAN
5 DAY
WHITE-RODGERS
DIGITAL MULTI-STAGE COMFORT-SET II
SYSTEM
SWITCH
TIME
FWD
SET
CLOCK
VIEW
PRGM
HOLD
TEMP
TIME
BACK
SET
DAY
RUN
PRGM
ADV
PRGM
HEAT/OFF/COOL/AUTO
FAN
SWITCH
ON
1
2 DAY
4
/AUTO
2
FAN
6
3
3
5 DAY
4
BAT
5
FAN
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
the week. Also used with
anticipation setting mode.
10
SET
CLOCK
to enter
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)
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.
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
16 17
EMER.
PUMP
MALF.
AUX.
FAN
5 DAY
WHITE-RODGERS
7
18
SYSTEM
SWITCH
DIGITAL MULTI-STAGE COMFORT-SET II
TIME
FWD
SET
CLOCK
VIEW
PRGM
HOLD
TEMP
TIME
BACK
SET
DAY
RUN
PRGM
ADV
PRGM
HEAT/OFF/COOL/AUTO
FAN
8
SWITCH
ON
/AUTO
9
10 11 12 13 14 15
11
Now that you are familiar with the thermostat
display and buttons, read the following information to learn about the many features of the
thermostat.
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.
• 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
• 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
OPERATING FEATURES
12
(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
• TWO HOUR TEMPERATURE OVERRIDE — 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
14
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
and
TIME
BACK
TIME
FWD
at the same time until the tem-
perature display is in °C (Celsius). To
display °F, repeat the process.
• ADJUSTABLE HEATING AND COOLING CYCLE TIMES (ANTICIPATION) —
If the heating/cooling system is turning on
and off too often (short cycles) or not often
enough (long cycles), you may want to
adjust the anticipation setting.
! CAUTION
heat cycles are too long, press
A cooling anticipation setting of less
than 10 may cause decreased compressor life.
To adjust HEAT anticipation, press
and
SET
DAY
SET
CLOCK
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
TIME
BACK
to
decrease the cycle time. To set COOL
anticipation, press
SET
CLOCK
SET
DAY
and
at the
same time again. The display will show
COOL 14 (factory preprogrammed coolTIME
FWD
ing anticipation). Use
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
anticipation. Press
TIME
FWD
and
RUN
PRGM
TIME
BACK
to adjust
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.
following may cause a time delay in COOL
or HEAT:
a) Return of power after a momentary
power outage.
• AUDIO PROMPTING — Each time you
press a button, the thermostat will beep.
b) Pressing
• 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).
• COMPRESSOR SHORT CYCLE PROTECTION — 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
16
SYSTEM
SWITCH
to change operating
modes.
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.
• 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 CONTROL — 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.
For example, if a power outage of three
hours occurs, the compressor will be locked
out for two hours.
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.
18
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.),
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
20
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
TIME
TEMP
70
MOR
5:00 AM
70
DAY
9:00 AM
70
EVE
4:00 PM
64
NHT
10:00 PM
RUN
PRGM
Cooling Program for ALL Days of the Week:
TEMP
PERIOD
TIME
MOR
5:00 AM
78
DAY
9:00 AM
82
EVE
4:00 PM
78
NHT
10:00 PM
78
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
Heating/Cooling Schedule Plan
WEEKDAY (5 DAY)
Start
Time
MOR HEAT
DAY HEAT
EVE HEAT
NHT HEAT
MOR COOL
DAY COOL
EVE COOL
NHT COOL
22
Temperature
WEEKEND (2 DAY)
Start
Time
Temperature
SAMPLE
Heating/Cooling Schedule Plan
WEEKDAY (5 DAY)
WEEKEND (2 DAY)
Start
Time
Temperature
Start
Time
Temperature
MOR HEAT
5:30 AM
68°
7:30 AM
68°
DAY HEAT
8:00 AM
66°
2:00 PM
70°
EVE HEAT
4:30 PM
70°
6:00 PM
70°
NHT HEAT
11:00 PM
66°
12:00 AM
66°
MOR COOL
8:00 AM
76°
8:00 AM
76°
DAY COOL
12:00 PM
78°
2:00 PM
74°
EVE COOL
4:30 PM
74°
6:00 PM
74°
NHT COOL
11:00 PM
78°
12:00 AM
78°
23
ENTERING YOUR PROGRAM
Follow these steps to enter the heating and
cooling programs you have selected.
NOTE
Set Current Time and Day
1. Press
SET
CLOCK
once. The display will show
minutes only.
EXAMPLE:
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 THERMOSTAT TO SUBBASE!
3. Press
You cannot program the thermostat with the
SYSTEM SWITCH in the AUTO position.
4. Press and hold either
24
2. Press and hold either
TIME
FWD
or
TIME
BACK
until you
reach the correct minutes.
SET
CLOCK
once. The display window will
show the hour only.
EXAMPLE:
TIME
FWD
or
TIME
BACK
until you
reach the correct hour and AM/PM designation (AM begins at midnight; PM begins
at noon).
5. Press
SET
DAY
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
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
once. The display will show the
1. Press
correct time and room temperature alternately.
2. Press
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
to resume program operation.
SYSTEM
SWITCH
VIEW
PRGM
until HEAT is displayed.
once. 5 DAY (indicating week-
day program), and MOR, representing
the morning heating period, will appear
in the display. Also displayed are the
currently programmed start time for the
MOR period and the currently programmed 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).
6. Press
7.
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
26
is displayed.
FAN
SWITCH
until
8.
9.
10.
VIEW
PRGM
. The currently programmed
start time and heating temperature for
weekday DAY will be displayed.
Repeat steps 3 through 5 to select the start
time and heating temperature for the weekday DAY program.
Repeat steps 3 through 7 for the weekday
EVE and NHT heating programs.
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).
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
4. Press
RUN
PRGM
.
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 COMPLETELY PROGRAMMED AND READY TO
AUTOMATICALLY PROVIDE MAXIMUM
COMFORT AND EFFICIENCY!
28
SYSTEM
SWITCH
until OFF is displayed. Reat-
tach thermostat to subbase. Then press
SYSTEM
SWITCH
to select the operation mode you
want (HEAT, COOL, AUTO). Press
until FAN
FAN
SWITCH
is displayed (automatic cycling).
QUESTIONS AND ANSWERS
1. How can I permanently change a part of
my program?
Press
VIEW
PRGM
until you reach the time/tem-
perature 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 OPERATING 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 PROGRAMMING 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 OPERATING 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.
32
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.
! 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 OPERATING 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 PROGRAMMING YOUR THERMOSTAT.
The thermostat is in the HOLD mode.
Press
•
RUN
PRGM
to start program operation.
See OPERATING YOUR THERMOSTAT.
The compressor lockout feature is operating; wait about 5 minutes for system to begin running. See OPERATING 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 THERMOSTAT.
• 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 OPERATING YOUR THERMOSTAT.
34
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 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?
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.
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 main-
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
tains 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