OPERATION GUIDE
1F90W-71
5 Day/2 Day Electronic
Digital Thermostat
WHITE-RODGERS
WHITE-RODGERS
Operator: Save this booklet for future use!
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In This Guide . . .
YOUR NEW THERMOSTAT'S
PROGRAMMING YOUR
FEATURES ............................................ 4
OPERATING YOUR THERMOSTAT ......... 5
PARTS OF THE THERMOSTAT
The Back Of the Thermostat Body
The Display
THERMOSTAT .................................... 19
PLANNING FOR YOUR NEEDS
ENTERING YOUR PROGRAM
Set Current Time and Day
Enter Heating Program
The Thermostat Buttons
Enter Cooling Program
OPERATING FEATURES
CHECK YOUR PROGRAMMING
QUESTIONS AND ANSWERS................. 29
Operator: Save this
booklet for future use!
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3
YOUR NEW THERMOSTAT’S FEATURES
• Separate5-day(weekday)and2-day(week-
• Compressor short cycle protection
• Programmable blower control
• Blower delay in the cooling cycle
• Audio and visual prompting during opera-
tion
• Two hour temperature override
• Manual program override (HOLD tempera-
ture)
end) setback programming
• Simultaneous heat and cool program stor-
age
• Fourseparatetime/temperaturesettingsper
24-hour period
• Computed Energy Management Recovery
(EMR)
• Automaticchangeover(operator-selectable)
• "Advance Program" key
• Armchair programming capability
• Backlit LCD displays continuous set point,
time, and room temperature
• 1.5 volt "AA" Energizer® alkaline battery
backup
• °F/°C convertibility
• Keypad lockout and limited temperature
range (operator-selectable)
• Temperature range 40° to 99°F
• Compatible with Remote Sensor (installer-
selectable)
• Preprogrammed temperature control
• Adjustable cycle times
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4
OPERATING YOUR THERMOSTAT
Before you begin programming your thermo- The subbase is attached to the wall, but you can
stat, you should be familiar with its features and remove the thermostat body for easy program-
with the display and the location and operation ming. To remove the thermostat body from the
of the thermostat buttons. The information in subbase, grasp the thermostat body and gently
this section will help you become familiar with pull it straight out from the subbase. To attach
your new thermostat so that you can easily thethermostatbody, lineupthesixterminalpins
program it.
on the upper section of the thermostat back with
the matching connector on the subbase. Insert
Your thermostat consists of two parts: the
thermostat body and the subbase.
CAUTION
!
SUBBASE
Remove power from the system at the
circuit breaker/fuse box before remov-
ing or attaching the thermostat body.
Equipment damage and/or personal in-
jury could occur.
THERMOSTAT
BODY
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5
these, then gently pivot the thermostat body
down to connect the three pin connectors on the
lower portion of the thermostat back. Gently
push until the snap connectors engage. DO
NOT FORCE OR PRY THE THERMOSTAT, as
this may damage the unit.
programming). Fresh batteries will main-
tain the stored program for approximately a
year. If power loss is long enough for the
program to be lost, the thermostat will auto-
matically return to the factory programmed
temperatures (64°F heating and 82°F cool-
ing) when power is restored. You must
reprogram the thermostat if this happens.
If the word BATTERY is flashing in the
display window, the batteries are low and
should be replaced with fresh "AA" Ener-
gizer® alkaline batteries.
PARTS OF THE THERMOSTAT
The Back of The Thermostat Body
Turn the thermostat body over. On the back are
the 3 "AA" Energizer® alkaline batteries and the
two option switch groups (A and B).
CAUTION
!
Before removing thermostat from the
wall to replace the batteries, remove
24vAC power from the thermostat at the
breaker/fuse box.
1. The "AA" Energizer® alkaline batteries pro-
videpowertothethermostatwhenthe24vAC
powerisinterrupted(forexample, whenyou
remove the thermostat from the wall for
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6
2. You may adjust the option switches for
keypad lockout, limited temperature range,
andautomaticchangeoverfromheattocool
(see OPERATING FEATURES).
Batteries
6-pin Connector
Other than
and
, the buttons are
locatedbehindthethermostatdoor. Toopenthe
door, pull the door out from the top, then swing
it down on its hinges.
(Group A)
(Group B)
On the following pages there are brief descrip-
tions of the display and the thermostat buttons.
Option Switches
3-pin Connector
BACK OF THERMOSTAT BODY
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7
5
6
The Display
The word BATTERY flashes on the display
when the "AA" alkaline batteries are weak
and should be replaced. The word BAT-
TERY is displayed continuously (non-flash-
ing) when thermostat is running on battery
power only.
1
2
Continuouslydisplayssystemmode(HEAT,
OFF, COOL, AUTO, HOLD). During pro-
gramming, the program period is displayed
(MOR, DAY, EVE, or NHT).
Alternately displays room temperature (F
denotesdegreesFahrenheitand Cdenotes
degrees Celsius) and time of day (A de-
notes AM time and P denotes PM time).
FAN ON is displayed when the blower is
operating continuously. FAN AUTO is dis-
playedduringautomaticfanoperation(when
theblowercycleswiththeheatingorcooling
system).
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.
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5
DAY
FAN AUTO
TIME
FWD
SET
VIEW
HOLD
TEMP
SYSTEM
HEAT-OFF-COOL-AUTO
CLOCK
PRGM
TIME
SET
DAY
RUN
ADV
FAN
ON - AUTO
BACK
PRGM
PRGM
1
2
3
3
2
DAY
FAN AUTO
5
DAY
FAN ON
BATTERY
6
4
4
2
5
6
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12
13
The Thermostat Buttons
Used to initiate or review thermostat pro-
gramming.
7
8
Sets the system mode (HEATing, OFF,
COOLing, or AUTOmatic changeover).
Used to start program operation after pro-
gramming. Also used to return thermostat
to program operation after being in HOLD
mode.
Selects fan operation (see #6, above). This
button is also used to program the fan to run
continuously during a program period.
14
15
Used to manually override programming to
holdataselectedtemperature(whenHOLD
is displayed).
9
Runs display forward or backward through
time, day, or anticipation settings during
programming.
Used to advance thermostat program to the
next program period (for example, from the
MOR program to the DAY program).
TIME
FWD
TIME
10
11
Used with the
and
buttons to
BACK
set current time and day of the week.
16
17
(Red arrow) Raises temperature setting
(99°F or 37°C maximum).
Used during programming to set the day of
the week to be programmed. Also used in
(Blue arrow) Lowers temperature setting
(40°F or 4°C minimum).
SET
conjunction with the
button to enter
CLOCK
anticipation setting mode.
18 Theredindicatorlightglowswheneverheat-
ing, cooling, or fan are in operation.
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10
17 16
18
5
DAY
FAN AUTO
TIME
FWD
SET
VIEW
HOLD
TEMP
SYSTEM
HEAT-OFF-COOL-AUTO
7
8
CLOCK
PRGM
TIME
SET
DAY
RUN
ADV
FAN
ON - AUTO
BACK
PRGM
PRGM
10
11 12
14 15
13
9
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temperature of 62°F, and that during the
next program period, beginning at 6:00 AM,
you have programmed a temperature of
70°F. The thermostat will automatically
activate the heating system at about 5:00
AM, so that the programmed 70°F tempera-
ture is reached by about 6:00 AM.
OPERATING FEATURES
Now that you are familiar with the thermostat
display and buttons, read the following informa-
tion to learn about the many features of the
thermostat.
This feature is controlled by Group B option
switch#3. ToenabletheEMRfunction,first
you must move option switch #3 (located on
the back of the thermostat body) to the OFF
position, if it has not already been done. To
do this, turn off 24v AC power to the thermo-
stat. Then remove the thermostat body
from the wall. Check the position of switch
#3 (the last switch on the right). If it is OFF
(down), simply put the thermostat back on
the wall and restore 24v AC power. If the
switch is ON (up), remove the battery, then
• COMPUTED ENERGY MANAGEMENT
RECOVERY (EMR) — The thermostat’s
microcomputer can be set to automatically
calculate the time it will take to change the
temperature to the next program setting.
Then the thermostat will activate the heat-
ing or cooling system to change the tem-
perature so that the desired temperature is
reached at the beginning of the next pro-
gram period. As an example of this feature,
assume that you have programmed your
thermostat to provide an overnight heating
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use a pencil or small screwdriver to move
the switch to the OFF position (see figure
below). Leavethebatteryoutofthethermo-
stat for at least two minutes, to allow the
thermostattoresetitself. SeeAUTOMATIC
CHANGEOVER to determine proper posi-
tions of Group B option switches #1 and #2.
system from heating to cooling as needed.
(If you have a heating only system, Group B
option switch #1 should be OFF and option
switch #2 should be ON.) To enable auto-
matic changeover, you must move Group B
option switch #1 to the ON position and
switch #2 to the OFF position. Turn off 24v
AC power to the thermostat. Then remove
the thermostat body from the wall. Check
the position of Group B option switches #1
and #2 (the first two switches on the left). If
they are in the correct positions, simply put
the thermostat back on the wall and restore
24v AC power. If the switches are not
correctly positioned, remove the battery,
then use a pencil or small screwdriver to
move the switches to the correct positions
(seefigureonnextpage). Leavethebattery
out of the thermostat for at least two min-
EMR (ON)
ON
Group B
Option
Switches
1
2
3
Switch #1 (see AUTOMATIC CHANGEOVER)
Switch #2 (see AUTOMATIC CHANGEOVER)
Switch #3 OFF
• AUTOMATIC CHANGEOVER — If you
have a heating/cooling system, you can set
the thermostat to automatically switch the
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utes, to allow the thermostat to reset itself.
Replace the battery, reprogram the thermo-
NOTE
stat, if necessary, put the thermostat back In the AUTO mode, the thermostat will not allow
on the wall, and restore 24v AC power. To the temperature separation between the high-
setthethermostatforautomaticchangeover est heat setting and the lowest cool setting to be
less than 1°F. For example, if the highest heat
SYSTEM
HEAT-OFF-COOL-AUTO
after programming, press
to set the
settingis75°F, thelowestcoolsettingcannotbe
below 77°F (see diagram below).
thermostat to AUTO (the setpoint tempera-
ture display is blank in the AUTO mode).
The system will now automatically switch
betweenheatingandcooling,dependingon
the actual room temperature.
79
78
77
COOLING TEMPERATURES
76 DEAD BAND 1°F
75
74
73
HEATING TEMPERATURES
Automatic Changeover
ON
For manual changeover, Group B option
switches #1 and #2 should be in the OFF
position.
Group B
Option
Switches
1
2
3
Switch #1 ON
Switch #2 OFF
• TWO HOUR TEMPERATURE OVER-
RIDE — Press
or
until the
Switch #3 (see Energy Management Recovery)
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display shows the temperature you want.
The thermostat will override current pro-
gramming and keep the room temperature
at the selected temperature for two hours.
After two hours, the thermostat will auto-
matically revert to the program.
• "ADVANCE PROGRAM" KEY — Press
ADV
to change the thermostat to the next
PRGM
program period. This will temporarily over-
ride the program, until the next program
period begins (for example, pressing this
key while in the DAY program will advance
the thermostat to the EVE program, which
will remain in effect until the NHT program
begins).
• HOLD TEMPERATURE — The thermostat
can hold any temperature within its range
for an indefinite period, without reverting to
HOLD
the program. Press
displayed. Then choose the desired hold
temperature by pressing or
. HOLD will be
TEMP
TIME
• °F/°C CONVERTIBILITY — Press
FWD
TIME
.
and
at the same time until the tem-
BACK
The thermostat will hold the room tempera-
ture at the selected setting until you press
RUN
perature display is in °C (Celsius). To
display °F, repeat the process.
• ADJUSTABLE HEATING AND COOLING
CYCLE TIMES (ANTICIPATION) — If the
heating/cooling system is turning on and off
too often (short cycles) or not often enough
to start program operation again.
PRGM
Thisfeatureisidealforenergyconservation
when the building is unoccupied for an ex-
tended period of time.
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(long cycles), you may want to adjust the
anticipation setting.
the adjustment is sufficient. If the heat
TIME
cyclesaretooshort,press
toincrease
FWD
CAUTION
!
the cycle time. If the heat cycles are too
TIME
A cooling anticipation setting of less than
10maycausedecreasedcompressorlife.
long, press
to decrease the cycle
BACK
time. To set cooling anticipation, press
SET
SET
DAY
and
at the same time again.
SET
CLOCK
To adjust heat anticipation, press
CLOCK
The display will show COOL 14 (factory
preprogrammed cooling anticipation). You
may select any anticipation setting from 4 to
SET
and
atthesametime. Thedisplaywill
DAY
show HEAT 5 (this is the factory prepro-
grammedheatinganticipationsetting). You
may select any anticipation setting from 2 to
40 (note that for hydronic systems, a
minimum anticipation setting of 15 is
recommended). Whenever adjusting an-
ticipation, increase or decrease the dis-
played number by only one or two digits,
then let the system run for a while to see if
TIME
FWD
TIME
40. Use the
and
buttons to
to return
BACK
RUN
PRGM
adjust anticipation. Press
to your program.
• LOW BATTERY INDICATOR — The word
BATTERY will flash on the display if the
"AA" alkaline batteries are low and should
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16
be replaced. The word BATTERY will be
displayedcontinuously(non-flashing)when
24v AC power is not being supplied to the
thermostat and the thermostat is operating
on battery power only.
cause a time delay in COOL:
a) Return of power after a power outage.
SYSTEM
HEAT-OFF-COOL-AUTO
b) Pressing
to change operating
modes.
c) Pressing
• AUDIO PROMPTING — Each time you
press a button, the thermostat will beep.
• BACKLIT DISPLAY — When you press
any button on the thermostat, the display is
lit for approximately eight seconds.
• SYSTEM INDICATOR LIGHT — The red
lightontheupperrightpartofthethermostat
indicatessystemoperation(seePARTSOF
THE THERMOSTAT).
• COMPRESSORSHORTCYCLEPROTEC-
TION — To protect your compressor from
potential damage due to rapid cycling, this
thermostat has a built-in delay of 5 minutes
between cooling cycles. The following may
, creating a call for COOL
too soon after a previous call.
• TOTAL KEYPAD LOCKOUT — When
Group A option switch #1 is in the total
keypad lockout position (ON), programs
cannot be altered and all buttons are dis-
abled.
NOTE
Programming should be completed and batter-
ies should be installed before changing Group
A option switches #1 or #2.
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peratures. To enable limited temperature
range, move Group A switch #1 to the OFF
position and switch #2 to the ON position
(see figure below). To disable limited tem-
perature range, move switch #2 to the OFF
position (see TOTAL KEYPAD LOCKOUT
to determine the correct position of option
switch #1).
Total Keypad Lockout
ON
Group A
Option
Switches
1
2
Switch #1 ON
Switch #2 OFF
Toenabletotalkeypadlockout,moveGroup
Aoptionswitch#1toON(seefigureabove).
To disable total keypad lockout, move op-
tion switch #1 to OFF.
• LIMITED TEMPERATURE RANGE —
When Group A option switch #1 is in the
OFF position and option switch #2 is in the
ON position, the heating and cooling tem-
peratures may be changed using the
NOTE
Programming should be completed and batter-
ies should be installed before changing Group
A option switches #1 or #2.
Limited Temperature Range
ON
Group A
Option
Switches
and
buttons, but the temperatures
1
2
maynotbesettoexceedanyprogrammed
Switch #1 OFF
Switch #2 ON
maximum heating or minimum cooling tem-
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PROGRAMMING YOUR THERMOSTAT
Now you are ready to program your thermostat.
This section will help you plan your thermostat's
program to meet your needs.
PLANNING FOR YOUR NEEDS
First, answer the following questionsto help you
decide what your needs are. If you are using the
thermostatforacommercialapplication(astore,
officebuilding,etc.),answerquestions1through
4. If you are using the thermostat in your home,
answer questions 5 through 8.
For maximum comfort and efficiency, keep the
following guidelines in mind when planning your
program.
• When heating (cooling) your building, pro-
gramthetemperaturestobecooler(warmer)
when the building is vacant or during peri-
ods of low activity.
FOR COMMERCIAL APPLICATIONS:
1a. What time does the first person arrive at the
building in the morning?
• During early morning hours, the need for
cooling is usually minimal.
b. What temperature should the building be at
this time? (heating? cooling?) These will be
your MOR (morning) temperature settings.
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2a. What time do the building occupants reach IN YOUR HOME:
amaximumactivitylevel(usinglights,equip- 5a. What time does the first person get up in the
ment, meeting rooms, etc.)?
b. What temperature should the building be at
this time? These will be your DAY tempera-
ture settings.
morning?
b. What temperature should the house be at
this time? These will be your MOR (morn-
ing) temperature settings.
3a. What time do the building occupants reach 6a. What time does the last person leave the
a minimum activity level (limited personnel
in building)?
b. What temperature should the building be at
thistime? ThesewillbeyourEVE (evening)
temperature settings.
4a. What time does the building become va-
cant?
b. What temperature should the building be at
this time? These will be your NHT (night)
temperature settings.
house in the morning?
b. What temperature should the house be at
this time? These will be your DAY tempera-
ture settings.
7a. What time does the first person arrive home
in the evening?
b. What temperature should the house be at
thistime? ThesewillbeyourEVE (evening)
temperature settings.
8a. What time does the last person go to bed at
night?
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b. What temperature should the house be at
this time? These will be your NHT (night)
temperature settings.
NOTE
To operate properly in the AUTO mode, there
must be a minimum 1°F separation between
the highest heat temperature and the lowest
cool temperature (see diagram below).
Now look at the factory preprogrammed times
and temperatures shown on the following page.
If this program will suit your needs, simply press
RUN
79
78
77
COOLING TEMPERATURES
to begin running the factory preset pro-
PRGM
76 DEAD BAND 1°F
75
gram.
74
73
HEATING TEMPERATURES
If you want to change the preprogrammed times
and temperatures, do the following.
Cooling Program for ALL Days of the Week:
Heating Program for ALL days of the Week:
TEMP
78
82
78
78
PERIOD
MOR
DAY
EVE
NHT
TIME
TEMP
70
70
70
64
PERIOD
MOR
DAY
EVE
NHT
TIME
5:00 AM
9:00 AM
4:00 PM
10:00 PM
5:00 AM
9:00 AM
4:00 PM
10:00 PM
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Determine the time periods and heating and
cooling temperatures for your weekday pro-
gram. You must program 4 periods for each day
(MOR, DAY, EVE, and NHT). However, you
mayusethesameheatingandcoolingtempera-
tures for consecutive time periods. You can
choose start times, heating temperatures, and
cooling temperatures independently for both
weekday and weekend programs (for example,
youmayselect5:00AMand70° astheweekday
MOR heating start time and temperature, and
choose 7:00 AM and 76° as the weekday MOR
cooling start time and temperature). Use the
following table to plan your program time peri-
ods,andthetemperaturesyouwantduringeach
period. You may also want to look at the sample
program table to get an idea of how the thermo-
stat can be programmed.
ENTERING YOUR PROGRAM
Follow these steps to enter the heating and
cooling programs you have selected.
NOTE
We recommend that you remove the thermostat
from the wall for programming (especially for
entering cooling programming). Fresh "AA"
Energizer® alkaline batteries must be installed
to perform off-wall programming. BE SURE
SYSTEM SWITCH IS SET TO OFF POSITION
BEFORE REATTACHING THERMOSTAT TO
SUBBASE!
NOTE
You cannot program the thermostat with the
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22
Heating/Cooling Schedule Plan
WEEKEND (2 DAY)
WEEKDAY (5 DAY)
Start
Time
Start
Time
Temperature
Temperature
MOR HEAT
DAY HEAT
EVE HEAT
NHT HEAT
MOR COOL
DAY COOL
EVE COOL
NHT COOL
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SAMPLE
Heating/Cooling Schedule Plan
WEEKEND (2 DAY)
WEEKDAY (5 DAY)
Start
Time
Start
Time
Temperature
68°F
Temperature
68°F
MOR HEAT
DAY HEAT
EVE HEAT
NHT HEAT
MOR COOL
DAY COOL
EVE COOL
NHT COOL
5:30 AM
7:00 AM
11:00 AM
6:00 PM
11:30 PM
7:00 AM
12:30 PM
6:00 PM
11:30 PM
8:00 AM
5:00 PM
10:30 PM
6:30 AM
2:00 PM
5:00 PM
10:30 PM
65°F
70°F
65°F
76°F
78°F
72°F
78°F
70°F
70°F
65°F
76°F
74°F
72°F
78°F
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Set Current Time and Day
SET
DAY
5. Press
once. Thedisplaywillshowthe
day of the week as an abbreviation (MO for
Monday, TU for Tuesday, etc.).
SET
1. Press
once. The display will show
CLOCK
minutes only.
EXAMPLE:
TIME
FWD
TIME
6. Press and hold either
or
until
BACK
you reach the current day of the week.
TIME
FWD
TIME
RUN
2. Press and hold either
or
until
BACK
7. Press
once. Thedisplaywillshowthe
PRGM
you reach the correct minutes.
correct time and room temperature alter-
nately.
SET
3. Press
once. The display window will
CLOCK
show the hour only.
EXAMPLE:
Enter Heating Program
During programming, if you don’t press any
buttons for 5 minutes, the thermostat will enter
the HOLD mode and will maintain a constant
temperature. The display will revert to the
alternating time/temperature display. To re-
sume programming after this happens, press
TIME
FWD
TIME
4. Press and hold either
or
until
BACK
you reach the correct hour and AM/PM
designation (AM begins at midnight; PM
begins at noon).
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This display window shows that for the
weekday MOR period, the start time is 5:00
AM, and 70° is the programmed tempera-
ture (this example reflects factory prepro-
gramming).
VIEW
until you are at the point where you
PRGM
stopped programming. Then you may continue
to enter your programs normally. If you want to
stop programming at any time, simply press
RUN
to resume program operation.
3. To change the displayed start time to your
PRGM
selected start time for weekday MOR heat
TIME
FWD
TIME
SYSTEM
HEAT-OFF-COOL-AUTO
program, press
or
until your
BACK
1. Press
2. Press
until HEAT is displayed.
selectedtimeappears. Thetimewillchange
in 15 minute increments.
VIEW
once. 5 DAY (indicating week-
PRGM
4. Press
or
until you reach your
day program), and MOR, representing the
morning heating period, will appear in the
display. Also displayed are the currently
programmed start time for the MOR period
and the currently programmed tempera-
ture.
selected weekday MOR heating tempera-
ture.
5. If you want the fan to run continuously
FAN
during this period, press
until PRG
ON – AUTO
FAN is displayed.
EXAMPLE:
5 DAY
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Enter Cooling Program
VIEW
6. Press
. The currently programmed
PRGM
starttimeandheatingtemperatureforweek-
day DAY will be displayed.
CAUTION
!
7. Repeat steps 3 through 5 to select the start
time and heating temperature for the week-
day DAY program.
8. Repeat steps 3 through 7 for the weekday
EVE and NHT heating programs.
If outside temperature is below 50°F, we
recommend that you remove the ther-
mostat from the wall before proceeding
withthefollowingstepstoprogramcool-
ing temperatures. Personal injury or
property damage may occur due to air
conditionercompressorslugging. Fresh
"AA" Energizer® alkaline batteries must
be installed to perform off-wall program-
ming. Programming away from the wall
should prevent accidental compressor
operation. BE SURE SYSTEM SWITCH
IS SET TO OFF POSITION BEFORE RE-
ATTACHINGTHETHERMOSTATTOTHE
SUBBASE!
9. After entering your weekday heating pro-
gram, repeat steps 1 through 8 for your
weekend programming (keep in mind that
for weekend programming, the display
should be changed from 5 DAY to 2 DAY).
10. When you have completed entering your
RUN
heating program, press
.
PRGM
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27
RUN
SYSTEM
HEAT-OFF-COOL-AUTO
1. Press
until COOL appears.
3. Press
4. Press
.
PRGM
2. Followtheprocedureforenteringyourheat-
ing program, using your selected cooling
times and temperatures.
SYSTEM
HEAT-OFF-COOL-AUTO
until COOL is displayed.
5. Repeat step 2 to check cooling tempera-
tures.
RUN
CHECK YOUR PROGRAMMING
6. Press
to begin program operation.
PRGM
Follow these steps to check your thermostat
programming one final time before beginning
thermostat operation.
YOURTHERMOSTATISNOWCOMPLETELY
PROGRAMMEDANDREADYTOAUTOMATI-
CALLYPROVIDEMAXIMUMCOMFORTAND
EFFICIENCY!
SYSTEM
1. Press
until HEAT is displayed.
HEAT-OFF-COOL-AUTO
SYSTEM
HEAT-OFF-COOL-AUTO
VIEW
Press
until OFF is displayed. Reattach
2. Press and hold
to view the heating
PRGM
thermostat to subbase. Turn on power to the
period times and temperatures in sequence
for weekday, then weekend MOR, DAY,
EVE, and NHT program periods.
SYSTEM
HEAT-OFF-COOL-AUTO
system. Thenpress
toselecttheopera-
tion mode you want (HEAT, COOL, AUTO).
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28
FAN
ON – AUTO
Press
until FAN AUTO is displayed
(automatic cycling).
QUESTIONS AND ANSWERS
1. How can I permanently change a part of
my program?
you may select the same weekday EVE
cooling temperature as you did for weekday
DAY, which means the temperature will not
change when the EVE period begins. See
PROGRAMMING YOUR THERMOSTAT.
VIEW
Press
until you reach the time/tem-
PRGM
perature schedule you want. Then press
TIME
FWD
TIME
3. How can I finish my programming if the
display has already changed to time/
temperature?
or
and
and
to
BACK
change the program. See PROGRAM-
MING YOUR THERMOSTAT.
During programming, if no buttons are
pressed for five minutes, the thermostat will
enter the HOLD mode and maintain a con-
stant temperature. The display will change
to the time/temperature mode. To resume
2. How can I have no change in tempera-
ture from one time period to another?
Simply select the same temperature for
eachconsecutivetimeperiod. Forexample,
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29
If fresh "AA" Energizer® alkaline batteries
are installed, the program will be main-
tained for about one year with no 24vAC
power present to the thermostat. See OP-
ERATING YOUR THERMOSTAT.
VIEW
programming, press
until you return
PRGM
to the point where you stopped program-
ming. Then you may continue to program
the thermostat normally. If you want to stop
RUN
programming at this point, press
to
5. Why can’t I program the thermostat in
the AUTO mode?
PRGM
start the normal program function. See
The thermostat can only be programmed in
the HEAT and COOL modes. See PRO-
GRAMMING YOUR THERMOSTAT.
PROGRAMMING YOUR THERMOSTAT.
4. What happens if the electricity goes off
or is manually shut off?
6. What can cause the thermostat display
to freeze or go blank?
If you have not installed 3 "AA" alkaline
batteries, the display will go blank and the
program will be lost in approximately one
minute. When electricity is restored, the
clock will reset itself to 12:00 PM (noon) and
the thermostat will maintain a heating tem-
perature of 64°F and a cooling temperature
of 82°F until you reenter your program.
Setpoint temperature will not be displayed.
A completely blank display may indicate
that power has been lost to the thermostat
and the backup battery is also dead. How-
ever, if there is power to the thermostat and
the display is blank or frozen, static dis-
charge is probably the cause.
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30
During periods of low humidity (especially
during cold weather), you may feel or see a
spark discharge when you touch the ther-
mostat. This may cause the program to be
lost or the thermostat to display incorrectly.
To correct this, remove the thermostat from
the wall and disconnect the battery. Wait
about one minute, then reconnect the bat-
tery. Thethermostatwillreverttothefactory
preset program until you reprogram the
thermostat. If you don’t want to reprogram
SYSTEM
To prevent further static discharge prob-
lems, touch another object to release static
build-up before touching the thermostat.
See OPERATING YOUR THERMOSTAT.
7. Why won’t the setpoint temperature go
to the temperature I want?
In the AUTO mode, the highest heating
setpoint temperature you select must be at
least 1°F lower than the lowest cooling
setpoint temperature you select (for ex-
ample, if 70°F is your lowest selected cool-
ing temperature, you cannot select a heat-
ing temperature any higher than 68°F). If
such a conflict exists, you must set the
lowest cooling temperature higher in order
to set the heating temperature higher. To
set a lower cooling temperature, you must
select a lower heating temperature. See
PROGRAMMING YOUR THERMOSTAT.
the thermostat immediately, press
HEAT-OFF-COOL-AUTO
until OFF is displayed and replace the ther-
RUN
mostat on the wall. Then press
to
PRGM
begin the factory preset program. Or you
may reprogram the thermostat, then re-
place it on the wall.
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31
8. The display is flashing BATTERY. What
does this mean?
callingforcool. Waitabout5minutesforthe
compressor lockout to expire. If the system
isstillnotrunning,readthecautionarystate-
ment below. Then, if conditions permit,
The "AA" batteries installed in the thermo-
stat are low and should be replaced with
fresh"AA"Energizer® alkalinebatteries. See
OPERATING YOUR THERMOSTAT.
use the
button to move the tempera-
ture below the setpoint temperature. See
OPERATING YOUR THERMOSTAT.
9. The display shows a continuous (non-
flashing) BATTERY. What does this
mean?
CAUTION
!
If the outside temperature is below 50°F,
DONOTusethe buttontomovethe
temperaturebelowthesetpointtempera-
ture. Property damage may result due to
compressor slugging.
The thermostat is not being supplied with
24vAC power. The thermostat is operating
on battery power alone. See OPERATING
YOUR THERMOSTAT.
10. Why won’t the compressor turn on, even
though the thermostat display is func-
tioning normally?
11. Why doesn’t the temperature change at
the time I programmed?
Either the compressor lockout feature is in
operation or the thermostat is not currently
There may be a number of causes for this
situation. The following are primary rea-
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32
sons.
ating; wait about 5 minutes for system to
beginrunning. SeeOPERATINGYOUR
THERMOSTAT.
•
The EMR function is operating. The
EMR function will automatically bring on
the system automatically to bring the
temperature to the selected level by the
beginning of the next program period.
See OPERATING YOUR THERMO-
STAT.
12. Why does the blower fan keep running
after the system has turned off?
•
You have programmed the fan to run
continuously during this period. See
PROGRAMMING YOUR THERMO-
STAT.
The blower delay feature is operating.
This energy saving feature continues to
blow conditioned air through the ducts
after the system has turned off, rather
than letting the air dissipate.
•
You have programmed the incorrect day
or time. Check your programming (be
sure that the times you programmed are
correct AM or PM times). See PRO-
GRAMMING YOUR THERMOSTAT.
The thermostat is in the HOLD mode.
RUN
•
•
•
13. Why is the system turning on and off so
frequently (seldom)?
Press
to start program operation.
PRGM
See OPERATING YOUR THERMO-
STAT.
The compressor lockout feature is oper-
The anticipation setting is too low (high). To
change anticipation settings, see OPER-
ATING YOUR THERMOSTAT.
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33
14. Between heating and cooling seasons, I 15. I live in an area where daylight savings
want to turn my system off. Can I do this
without affecting my thermostat pro-
gramming?
time is observed. How do I change the
thermostat clock twice a year without
affecting thermostat programming?
To change your clock, follow the instruc-
tions for setting current time and day. See
ENTERING YOUR PROGRAM. Thermo-
stat programming is not affected when you
change the clock.
Any time you wish to turn your system off,
SYSTEM
HEAT-OFF-COOL-AUTO
simplypress
untilthedisplayshows
OFF. This will not affect your thermostat’s
programming in any way. To turn the sys-
SYSTEM
tem back on, press
until HEAT,
16. Do I have to reprogram my thermostat
after I change the batteries?
HEAT-OFF-COOL-AUTO
COOL, etc. is displayed. The system will
automatically begin operating according to
the current thermostat program, unless the
thermostat is in the HOLD mode. See
OPERATING YOUR THERMOSTAT.
When the thermostat is on the wall and the
system has power, the thermostat is being
powered by a 24v AC source. If power is
lost, or if the thermostat is removed from the
wall, the program will be retained for ap-
proximately one minute if there are no
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34
batteriesinstalledoriftheinstalledbatteries
are dead. If you are changing the batteries
after seeing a flashing BATTERY on the
display, theinstalledbatteriesmaybedead.
If you remove the old batteries and install
fresh ones within one minute, you should
not lose your thermostat programming. Af-
terinstallingnewbatteries, followtheproce-
dures in CHECK YOUR PROGRAMMING
to determine whether your programming
was maintained. If the thermostat main-
SYSTEM
HEAT-OFF-COOL-AUTO
tainsprogramming,press
untilOFF
is displayed, put the thermostat back on the
SYSTEM
HEAT-OFF-COOL-AUTO
wall, press
to select the operating
RUN
mode you want, then press
to start
PRGM
program operation. If the program is lost,
reprogramthethermostat. SeePROGRAM-
MING YOUR THERMOSTAT.
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35
If you need further information on programming or operation, write to:
White-Rodgers Division, Emerson Electric Co.
9797 Reavis Road
St. Louis, MO 63123
Attn: Technical Service Department
Part No. 37-5088A
9139
R
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