OPERATION GUIDE
1F90-71
5 Day/2 Day Electronic
Digital Thermostat
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-
• Adjustable cycle times
end) setback programming
• Compressor short cycle protection
• Programmable blower control
• Blower delay in the cooling cycle
• Audio and visual prompting during operation
• Two hour temperature override
• Simultaneousheatandcoolprogramstorage
• Fourseparatetime/temperaturesettingsper
24-hour period
• Computed Energy Management Recovery
(EMR)
• Manual program override (HOLD tempera-
ture)
• Automaticchangeover(operator-selectable)
• Armchair programming capability
• “Advance Program” key
• Backlit LCD displays continuous set point,
time, and room temperature
• 1.5 volt “AA” Energizer® alkaline battery
• °F/°C convertibility
• Keypad lockout and limited temperature
range (operator-selectable)
backup
• Temperature range 40° to 99°F
• Compatible with Remote Sensor (installer-
selectable)
• Preprogrammed temperature control
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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 the thermostat body, line up the three terminal
program it.
pins on the lower section of the thermostat back
with the matching connector on the subbase.
Insert these, then gently pivot the thermostat
body up to connect the six pin connectors on the
upper portion of the thermostat back. Gently
push until the snap connectors engage. DO
NOT FORCE OR PRY THE THERMOSTAT, as
this may damage the unit.
Your thermostat consists of two parts: the
thermostat body and the subbase.
CAUTION
!
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.
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5
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
!
1. The “AA” Energizer® alkaline batteries pro-
vide power to the thermostat when the
24 VAC power is interrupted (for example,
when you remove the thermostat from the
wall for programming). Fresh batteries
will maintain the stored program for ap-
proximately a year. 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 must reprogram the thermo-
stat if this happens.
SYSTEM
SWITCH
Use
to turn the thermostat OFF
beforeremovingthethermostatfromthe
wall to replace batteries.
2. You may adjust the option switches for
keypad lockout, limited temperature range,
andautomaticchangeoverfromheattocool
(see OPERATING FEATURES).
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6
Other than
and
, the buttons are
Batteries
6-pin connector
locatedbehindthethermostatdoor. Toopenthe
door, put your fingernail in the indentation at the
topofthedoor,thenpullthedooroutfromthetop
and swing it down on its hinges.
On the following pages there are brief descrip-
tions of the display and the thermostat buttons.
(Group A)
(Group B)
Option switches
3-pin Connector
BACK OF THERMOSTAT BODY
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7
The Display
The word BATTERY flashes on the display
5
6
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.
Continuouslydisplayssystemmode(HEAT,
1
2
OFF, COOL, AUTO, HOLD). During pro-
gramming, the program period is displayed
(MOR, DAY, EVE, or NHT).
Alternately displays room temperature (F
FAN ON is displayed when the blower is
denotesdegreesFahrenheitand Cdenotes
degrees Celsius) and time of day (A de-
notes AM time and P denotes PM time).
operating continuously. FAN AUTO is dis-
playedduringautomaticfanoperation(when
theblowercycleswiththeheatingorcooling
system).
Displays the setpoint temperature.
3
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
WHITE-RODGERS
DIGITAL COMFORT SET II
TIME
FWD
SET
VIEW
HOLD
TEMP
SYSTEM
SWITCH
CLOCK
PRGM
HEAT-OFF-COOL-AUTO
FAN
SWITCH
TIME
SET
DAY
RUN
ADV
BACK
PRGM
PRGM
ON-AUTO
1
2
3
3
2 DAY
FAN AUTO
5 DAY
FAN ON
BATTERY
4
6
4
6
2
5
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The Thermostat Buttons
Used to initiate or review thermostat pro-
gramming.
12
13
Sets the system mode (HEATing, OFF,
COOLing, or AUTOmatic changeover).
7
8
Used to start program operation after pro-
gramming.Alsousedtoreturnthermostatto
program operation after being in HOLD
mode.
Selects fan operation (see #6, above). This
button is also used to program the fan to run
continuously during a program period.
Used to manually override programming to
14
15
16
Runs display forward or backward through
9
holdataselectedtemperature(whenHOLD
is displayed).
time, day, or anticipation settings during
programming.
TIME
FWD
TIME
Used to advance thermostat program to the
Used with
and
to set current time
10
11
BACK
next program period (for example, from the
MOR program to the DAY program).
and day of the week.
Used during programming to set the day of
(Red arrow) Raises temperature setting
the week to be programmed. Also used in
(99°F or 37°C maximum).
SET
conjunction with
setting mode.
to enter anticipation
CLOCK
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(Blue arrow) Lowers temperature setting
Theredindicatorlightglowswheneverheat-
ing, cooling, or fan are in operation.
17
18
(40°F or 4°C minimum).
17 16
18
5 DAY
FAN AUTO
WHITE-RODGERS
DIGITAL COMFORT SET II
TIME
FWD
SET
VIEW
HOLD
TEMP
SYSTEM
SWITCH
7
8
CLOCK
PRGM
HEAT-OFF-COOL-AUTO
FAN
SWITCH
TIME
SET
DAY
RUN
ADV
BACK
PRGM
PRGM
ON-AUTO
9
10 11 12 13 14 15
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next program period, beginning at 6:00 AM,
you have programmed a temperature of
70°F. The thermostat will automatically ac-
tivate the heating system at about 5:00 AM,
so that the programmed 70°F temperature
is reached by about 6:00 AM.
OPERATING FEATURES
Now that you are familiar with the thermostat
display and buttons, read the following informa-
tion to learn about the many features of the
thermostat.
• 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
temperature of 62°F, and that during the
This feature is controlled by Group B option
switch #3. To enable the EMR function, 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
dothis, turnoff24VACpowertothethermo-
stat. Thenremovethethermostatbodyfrom
thewall.Checkthepositionofswitch#3(the
last switch on the right). If it is OFF (down),
simply put the thermostat back on the wall
and restore 24 VAC power. If the switch is
ON (up), remove the battery, then use a
pencil or small screwdriver to move the
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switch to the OFF position (see figure be-
low). Leavethebatteryoutofthethermostat
for at least two minutes, to allow the ther-
mostat to reset itself. See AUTOMATIC
CHANGEOVER to determine proper posi-
tions of Group B option switches #1 and #2.
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 24
VAC 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
24 VAC power. If the switches are not cor-
rectly positioned, remove the battery, then
use a pencil or small screwdriver to move
the switches to the correct positions (see
figure on next page). Leave the battery out
of the thermostat for at least two minutes,
to allow the thermostat to reset itself. Re-
place the battery, reprogram the thermo-
EMR (ON)
ON
Group B
Option
Switches
1
2
3
Switch #1 (see AUTOMATIC CHANGEOVER)
Switch #2 (see AUTOMATIC CHANGEOVER)
Switch #3 OFF
• AUTOMATICCHANGEOVER—Ifyouhave
a heating/cooling system, you can set the
thermostat to automatically switch the sys-
tem from heating to cooling as needed. (If
you have a heating only system, Group B
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stat, if necessary, put the thermostat back
on the wall, and restore 24 VAC power. To
NOTE
setthethermostatforautomaticchangeover In the AUTO mode, the thermostat will not allow
the temperature separation between the high-
SYSTEM
SWITCH
after programming, press
to set the
est heat setting and the lowest cool setting to be
less than 1°F. For example, if the highest heat
settingis76°F, thelowestcoolsettingcannotbe
below 77°F (see diagram below).
79
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.
COOLING TEMPERATURES
78
77
76
75
74
73
DEAD BAND 1°F
Automatic Changeover
HEATING TEMPERATURES
ON
Group B
Option
Switches
For manual changeover, Group B option
switches #1 and #2 should be in the OFF
position.
1
2
3
Switch #1 ON
Switch #2 OFF
• TWO HOUR TEMPERATURE OVER-
Switch #3 (see Energy Management Recovery)
RIDE — Press
or
until the dis-
play shows the temperature you want. The
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14
thermostat will override current program-
ming and keep the room temperature at the
selected temperature for two hours. After
two hours, the thermostat will automatically
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
. HOLD will be dis-
TEMP
played. Then choose the desired hold tem-
perature by pressing or . The
thermostat will hold the room temperature
TIME
• °F/°C CONVERTIBILITY — Press
and
FWD
TIME
at the same time until the temperature
BACK
RUN
at the selected setting until you press
to
PRGM
display is in °C (Celsius). To display °F,
repeat the process.
start program operation again. This feature
is ideal for energy conservation when the
building is unoccupied for an extended pe-
riod of time.
• 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
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15
(long cycles), you may want to adjust the
anticipation setting.
sufficient. If the heat cycles are too short,
TIME
press
to increase the cycle time. If the
FWD
CAUTION
!
TIME
heat cycles are too long, press
to de-
BACK
Acoolinganticipationsettingoflessthan
10maycausedecreasedcompressorlife.
creasethecycletime. Toset coolingantici-
SET
SET
DAY
pation, press
and
at the same time
CLOCK
SET
To adjust heat anticipation, press
and
CLOCK
again. The display will show COOL 14 (fac-
tory preprogrammed cooling anticipation).
Youmayselectanyanticipationsettingfrom
SET
at the same time. The display will show
DAY
HEAT 5 (this is the factory preprogrammed
heating anticipation setting). You may se-
lect any anticipation setting from 2 to 40
(note that for hydronic systems, a mini-
mum anticipation setting of 15 is recom-
mended).Wheneveradjustinganticipation,
increase or decrease the displayed number
by only one or two digits, then let the system
run for a while to see if the adjustment is
TIME
FWD
TIME
4 to 40. Use
tion. Press
and
to adjust anticipa-
BACK
RUN
PRGM
to return to your program.
• LOW BATTERY INDICATOR — The word
BATTERY will flash on the display if the
“AA” alkaline batteries are low and should
be replaced. The word BATTERY will be
displayedcontinuously(non-flashing)when
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24 VAC power is not being supplied to the
thermostat and the thermostat is operating
on battery power only.
SYSTEM
SWITCH
b) Pressing
modes.
to change operating
c) Pressing
, creating a call for COOL
• AUDIO PROMPTING — Each time you
press a button, the thermostat will beep.
too soon after a previous call.
• TOTALKEYPADLOCKOUT—WhenGroup
A option switch #1 is in the total keypad
lockout position (ON), programs cannot be
altered and all buttons are disabled (see next
page for illustration).
• 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).
NOTE
• COMPRESSORSHORTCYCLEPROTEC- Programming should be completed and batter-
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
cause a time delay in COOL:
ies should be installed before changing Group
A option switches #1 or #2.
a) Return of power after a power outage.
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Total Keypad Lockout
SET
DAY
HOLD
TEMP
ADV
PRGM
ON
Switch #1 ON
Switch #2 OFF
Group A
Option
Switches
NOTE
1
2
Programming should be completed and batter-
ies should be installed before changing Group
A option switches #1 or #2.
Toenabletotalkeypadlockout,moveGroup
Aoptionswitch#1toON(seefigureabove).
To disable total keypad lockout, move op-
tion switch #1 to OFF.
Limited Temperature Range
ON
Switch #1 OFF
Group A
• 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
Option
Switches
Switch #2 ON
1
2
To enable limited temperature range, move
Group A switch #1 to the OFF position and
switch #2 to the ON position (see figure
below).Todisablelimitedtemperaturerange,
move switch #2 to the OFF position (see
TOTAL KEYPAD LOCKOUT to determine
the correct position of option switch #1).
and
buttons, but the temperatures
maynotbesettoexceedanyprogrammed
maximum heating or minimum cooling tem-
peratures. When this option is set, the fol-
lowing buttons are disabled:
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PROGRAMMING YOUR THERMOSTAT
Now you are ready to program your thermostat. thermostatforacommercialapplication(astore,
This section will help you plan your thermostat’s officebuilding,etc.),answerquestions1through
program to meet your needs.
For maximum comfort and efficiency, keep the
4. If you are using the thermostat in your home,
answer questions 5 through 8.
following guidelines in mind when planning your FOR COMMERCIAL APPLICATIONS:
program.
1a. What time does the first person arrive at the
building in the morning?
• When heating (cooling) your building, pro-
gramthetemperaturestobecooler(warmer)
when the building is vacant or during peri-
ods of low activity.
b. What temperature should the building be at
this time? (heating? cooling?) These will be
your MOR (morning) temperature settings.
• During early morning hours, the need for
cooling is usually minimal.
2a. What time do the building occupants reach
amaximumactivitylevel(usinglights,equip-
ment, meeting rooms, etc.)?
PLANNING FOR YOUR NEEDS
b. What temperature should the building be at
this time? These will be your DAY tempera-
ture settings.
First, answer the following questions to help you
decide what your needs are. If you are using the
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19
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)?
house in the morning?
b. What temperature should the house be at
this time? These will be your DAY tempera-
ture settings.
b. What temperature should the building be at
thistime? ThesewillbeyourEVE (evening)
temperature settings.
7a. What time does the first person arrive home
in the evening?
4a. What time does the building become va-
cant?
b. What temperature should the house be at
thistime? ThesewillbeyourEVE (evening)
temperature settings.
b. What temperature should the building be at
this time? These will be your NHT (night)
temperature settings.
8a. What time does the last person go to bed at
night?
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 NHT (night)
temperature settings.
b. What temperature should the house be at
this time? These will be your MOR (morn-
ing) temperature settings.
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79
78
77
76
75
74
73
Now look at the factory preprogrammed times
and temperatures shown below. If this program
COOLING TEMPERATURES
DEAD BAND 1°F
HEATING TEMPERATURES
RUN
will suit your needs, simply press
to begin
PRGM
running the factory preset program.
If you want to change the preprogrammed times
and temperatures, do the following.
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
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 at right).
FACTORY PREPROGRAMMING
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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21
weekday and weekend programs (for example, ergizer® alkaline batteries must be installed to
youmayselect5:00AMand70° astheweekday perform off-wall programming. BE SURE TO
MOR heating start time and temperature, and
SYSTEM
SWITCH
USE
TO TURN THERMOSTAT OFF
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.
BEFORE REATTACHING THERMOSTAT TO
SUBBASE!
NOTE
You cannot program the thermostat with the
SYSTEM SWITCH in the AUTO position.
Set Current Time and Day
ENTERING YOUR PROGRAM
SET
Follow these steps to enter the heating and
cooling programs you have selected.
1. Press
once. The display will show min-
CLOCK
utes only.
NOTE
EXAMPLE:
We recommend that you remove the thermostat
from the wall for programming (especially for
entering cooling programming). Fresh “AA” En-
TIME
FWD
TIME
2. Press and hold either
or
until you
BACK
reach the correct minutes.
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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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23
SAMPLE
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
5:30 AM
68°F
7:00 AM
11:00 AM
6:00 PM
11:30 PM
7:00 AM
12:30 PM
6:00 PM
11:30 PM
68°F
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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24
SET
RUN
3. Press
once. The display window will 7. Press
once. The display will show the
CLOCK
PRGM
show the hour only.
EXAMPLE:
correct time and room temperature alter-
nately.
Enter Heating Program
TIME
FWD
TIME
4. Press and hold either
or
until you
BACK
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 alter-
natingtime/temperaturedisplay.Toresumepro-
VIEW
reachthecorrecthourandAM/PMdesigna-
tion (AM begins at midnight; PM begins at
noon).
SET
5. Press
once. The display will show the
DAY
gramming after this happens, press
until
PRGM
day of the week as an abbreviation (MO for
Monday, TU for Tuesday, etc.).
youareatthepointwhereyoustoppedprogram-
ming. Then you may continue to enter your
programs normally. If you want to stop program-
RUN
TIME
FWD
TIME
6. Press and hold either
or
until you
BACK
reach the current day of the week.
ming at any time, simply press
to resume
PRGM
program operation.
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25
TIME
FWD
TIME
SYSTEM
SWITCH
1. Press
2. Press
until HEAT is displayed.
program, press
or
until your se-
BACK
lected time appears. The time will change in
15 minute increments.
VIEW
once.5DAY(indicatingweekday
PRGM
program),andMOR,representingthemorn-
ing heating period, will appear in the dis-
play. Also displayed are the currently pro-
grammed start time for the MOR period and
the currently programmed temperature.
4. Press
or
until you reach your
selected weekday MOR heating tempera-
ture.
5. If you want the fan to run continuously
FAN
during this period, press
FAN is displayed.
VIEW
until PRG
SWITCH
EXAMPLE:
5 DAY
This display window shows that for the
weekday MOR period, the start time is 5:00
AM, and 70° is the programmed tempera-
ture (this example reflects factory prepro-
gramming).
6. Press PRGM . The currently programmed start
time and heating temperature for weekday
DAY will be displayed.
7. Repeat steps 3 through 5 to select the start
time and heating temperature for the week-
day DAY program.
3. To change the displayed start time to your
selected start time for weekday MOR heat
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26
8. Repeat steps 3 through 7 for the weekday
Enter Cooling Program
EVE and NHT heating programs.
CAUTION
!
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).
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
SYSTEM
10. When you have completed entering your
RUN
heating program, press
.
PRGM
operation. USE
TO TURN THER-
SWITCH
MOSTAT OFF BEFORE REATTACHING
THE THERMOSTAT TO THE SUBBASE!
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27
SYSTEM
SWITCH
SYSTEM
SWITCH
1. Press
until COOL appears.
4. Press
until COOL is displayed.
2. Followtheprocedureforenteringyourheat- 5. Repeat step 2 to check cooling tempera-
ing program, using your selected cooling
times and temperatures.
tures.
RUN
6. Press
to begin program operation.
PRGM
CHECK YOUR PROGRAMMING
YOURTHERMOSTATISNOWCOMPLETELY
PROGRAMMEDANDREADYTOAUTOMATI-
CALLYPROVIDEMAXIMUMCOMFORTAND
EFFICIENCY!
Follow these steps to check your thermostat
programming one final time before beginning
thermostat operation.
SYSTEM
SWITCH
SYSTEM
SWITCH
1. Press
until HEAT is displayed.
Press
until OFF is displayed. Reattach
thermostat to subbase. Turn on power to the
VIEW
2. Press and hold
to view the heating
PRGM
SYSTEM
system. Thenpress
toselecttheopera-
SWITCH
period times and temperatures in sequence
for weekday, then weekend MOR, DAY, tion mode you want (HEAT, COOL, AUTO).
EVE, and NHT program periods.
FAN
SWITCH
Press
until FAN AUTO is displayed
RUN
3. Press
28
.
PRGM
(automatic cycling).
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QUESTIONS AND ANSWERS
1. How can I permanently change a part of
change when the EVE period begins. See
PROGRAMMING YOUR THERMOSTAT.
my program?
3. How can I finish my programming if the
display has already changed to time/
temperature?
VIEW
Press
untilyoureachthetime/tempera-
PRGM
TIME
FWD
ture schedule you want. Then press
or
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
VIEW
TIME
and
and
to change the
BACK
program. See PROGRAMMING YOUR
THERMOSTAT.
2. How can I have no change in tempera-
ture from one time period to another?
programming, press
until you return to
PRGM
Simply select the same temperature for
eachconsecutivetimeperiod. Forexample,
you may select the same weekday EVE
cooling temperature as you did for weekday
DAY, which means the temperature will not
the point where you stopped programming.
Then you may continue to program the
thermostat normally. If you want to stop
RUN
programmingatthispoint, press
tostart
PRGM
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29
the normal program function. See PRO- 5. Why can’t I program the thermostat in
GRAMMING YOUR THERMOSTAT.
the AUTO mode?
4. What happens if the electricity goes off
or is manually shut off?
The thermostat can only be programmed in
the HEAT and COOL modes. See PRO-
GRAMMING YOUR THERMOSTAT.
If you have not installed 3 “AA” alkaline
batteries, the display will go blank and the 6. What can cause the thermostat display
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.
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 dis-
charge is probably the cause.
If fresh “AA” Energizer® alkaline batteries
are installed, the program will be main-
tained for about one year with no 24 VAC
power present to the thermostat. See OP-
ERATING YOUR THERMOSTAT.
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.
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30
To correct this, remove the thermostat from 7. Why won’t the setpoint temperature go
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 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
SWITCH
until OFF is displayed and replace the ther-
RUN
mostat on the wall. Then press
to begin
PRGM
the factory preset program. Or you may
reprogramthethermostat,thenreplaceiton
the wall.
To prevent further static discharge prob-
lems, touch another object to release static
build-up before touching the thermostat.
See OPERATING YOUR THERMOSTAT.
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31
8. The display is flashing BATTERY. What
does this mean?
calling for cool. Wait about 5 minutes for the
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,
DO NOT use the button to move the
temperaturebelowthesetpointtempera-
ture. Property damage may result due to
compressor slugging.
The thermostat is not being supplied with
24 VAC 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?
There may be a number of causes for this
situation. The following are primary reasons.
Either the compressor lockout feature is in
operation or the thermostat is not currently
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32
•
•
The EMR function is operating. The EMR 12. Why does the blower fan keep running
function will automatically bring on the
system automatically to bring the tem-
peraturetotheselectedlevelbythebegin-
ning of the next program period. See
OPERATING YOUR THERMOSTAT.
after the system has turned off?
•
You have programmed the fan to run
continuouslyduringthisperiod.SeePRO-
GRAMMING 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.
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.
13. Why is the system turning on and off so
frequently (seldom)?
•
•
The thermostat is in the HOLD mode.
RUN
Press
tostartprogramoperation.See
The anticipation setting is too low (high). To
change anticipation settings, see OPER-
ATING YOUR THERMOSTAT.
PRGM
OPERATING YOUR THERMOSTAT.
The compressor lockout feature is oper-
ating; wait about 5 minutes for system to
begin running. See OPERATING 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
withoutaffectingmythermostatprogram-
ming?
time is observed. How do I change the
thermostat clock twice a year without
affecting thermostat programming?
Any time you wish to turn your system off,
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.
SYSTEM
SWITCH
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,
SWITCH
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 OP-
ERATING YOUR THERMOSTAT.
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34
16. Do I have to reprogram my thermostat
after I change the batteries?
to determine whether your programming
wasmaintained. Ifthethermostatmaintains
SYSTEM
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 ap-
proximately one minute if there are no
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
programming, press
until OFF is
SWITCH
displayed, put the thermostat back on the
SYSTEM
SWITCH
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. 37-5098B
Replaces 37-5098A
9518
R
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