Blue 4” Universal Thermostat with
Automatic Heat/Cool Changeover Option
Single Stage, Multi-Stage or Heat Pump
Installation and Operating Instructions for Model:
Save these instructions for future use!
Model
Programming Choices
5/1/1 Day
FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS
CAREFULLY BEFORE INSTALLING OR OPERATING
THIS CONTROL COULD CAUSE PERSONAL INJURY
AND/OR PROPERTY DAMAGE.
7 Day
1F85-0477
APPLICATIONS
1F85-0477 Thermostat
THERMOSTAT APPLICATION GUIDE
Description
Heat Pump (No Aux. or Emergency Heat)
Heat Pump (with Aux. or Emergency Heat)
Systems with up to 2 Stages Heat, 2 Stages Cool
Heat Only Systems (with optional fan switch)
Millivolt Heat Only Systems – Floor or Wall Furnaces
Cool Only Systems
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Gas or Oil Heat
Electric Furnace
Hydronic (Hot Water) Zone Heat – 2 Wires
Hydronic (Hot Water) Zone Heat – 3 Wires
SPECIFICATIONS
Electrical Rating:
Battery Power.................................................... mV to 30 VAC, NEC Class II, 50/60 Hz or DC
Input-Hardwire................................................... 20 to 30 VAC
Terminal Load........................................................... 1.5 A per terminal, 2.5A maximum all terminals combined
Setpoint Range......................................................... 45° to 90°F (7° to 32°C)
Rated Differentials:
Fast
Med.
0.6 °F
1.2 °F
1.2 °F
–
Slow
Heat (SS1, MS2) ............................................... 0.4 °F
Cool (SS1, MS2)................................................ 0.9 °F
Heat Pump (HP1, HP2) ..................................... 0.9 °F
Emer (HP1, HP2)............................................... 0.6 °F
1.7 °F
1.7 °F
1.7 °F
1.7 °F
Operating Ambient.................................................... 32° to +105°F (0° to +41°C)
Operating Humidity................................................... 90% non-condensing max.
Shipping Temperature Range ................................... -40° to +150°F (-40° to +65°C)
Dimensions Thermostat............................................ 3-7/8”H x 5-1/8”W x 1-1/4”D
ATTENTION: MERCURY NOTICE
This product does not contain mercury.However, this product
may replace a product that contains mercury.
CAUTION
To prevent electrical shock and/or equipment damage,
disconnect electric power to system at main fuse or
circuit breaker box until installation is complete.
!
Mercury and products containing mercury must not be
discarded in household trash. Do not touch any spilled
mercury.Wearing non-absorbent gloves, clean up any spilled
mercury and place in a sealed container. For proper disposal
of a product containing mercury or a sealed container. Refer
containing mercury.
Index
Installation
Wiring Connections
Wiring Diagrams
Page
2
2
3
5
6
8
9
Thermostat Quick Reference
Installer Configuration Menu
Operating Your Thermostat
Programming
Troubleshooting
10
PART NO. 37-7238A
1118
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WIRING DIAGRAMS
Heat Pump Connections
HEAT PUMP TYPE 1 (HP 1). Single stage compressor
system; gas or electric backup.
HEAT PUMP TYPE 2 (HP 2). Multi-stage compressor or two
compressor system with gas or electric backup.
After wiring, see INSTALLER CONFIGURATION section for
proper thermostat configuration.
If you do not have a heat pump system, refer to figures 4-6.
Refer to equipment manufacturers’ instructions for specific
system wiring information.
You can configure the thermostat for use with the following
heat pump systems.
Figure 3 – Heat Pump Systems
Jumper
Jumper
L
W/E
Y
Y2
O/B
W2
C
G
RH RC
System
NOTE: If your system does
not provide an E connection,
jumper W2 to W/E to use
the Auxiliary Heat in the
Emergency Mode.
Heat Mode
2nd Stage.
Emergency
Mode 2nd
Stage
O
Blower/
Circulator
No
Heat Pump 1
(HP1)
Energized in
Cool Mode
Output
Fan Energized
Fault Indicator
or System
Malfunction
Switch
Optional*
24 Volt
(Com-
mon)
Heat and
Cool Mode
1st Stage
Emergency
Mode
1st Stage
on Call for 24 Volt
Heat or Cool. (Hot)
Set Elect/Gas Heat
Option for
Emergency
Mode
24 Volt
(Hot)
Cool
B
Heat Mode
3rd Stage.
Emergency
Mode 2nd
Stage
Energized in
Heat, Off,
Emergency
Mode
* Common connection
required for fault or
malfunction indication.
2nd
Stage
(Com-
pressor)
(Compressor)
Heat Pump 2
(HP2)
Comfort Alert II Module
or Similar System
NEUTRAL
24VAC
HOT
Malfunction Module
120VAC
CLASS II
TRANSFORMER
Single Stage and Multi-Stage Connections
Refer to equipment manufacturers’ instructions for specific
system wiring information.
This thermostat is designed to operate a single-transformer
or two-transformer system.
SINGLE STAGE (SS 1) gas, oil or electric.
MULTI-STAGE (MS 2) gas, oil or electric.
After wiring, see INSTALLER CONFIGURATION section for
proper thermostat configuration.
You can configure the thermostat for use with the following
fossil fuel systems:
Figure 4 – Single Stage or Multi-Stage System (No Heat Pump) with Single Transformer
Jumper
L
O/B
W/E
W2
G
RH
C
Y
RC
Y2
System
Single
Stage 1
(SS1)
Blower/
Circulator
Fan Energized
on Call for
Cool (and
Heat if
configured
for Electric
Heat)
O
No
No Output
Energized Constantly
in Cool Mode
* Common connection
required for fault or
malfunction indication.
Fault
Indicator
or
System
Malfunction
Switch
Output
Optional*
24 Volt
(Com-
mon)
Heat
Mode
1st Stage
24 Volt
(Hot)
Cool
24 Volt
(Hot)
Heat
Cool Mode
1st Stage
B
Energized Constantly
in Heat, Off,
Emergency
Mode
Multi-
Stage 2
(MS2)
Cool
Mode
2nd
Heat Mode
2nd Stage
Stage
System Malfunction
Module
NEUTRAL
24VAC
HOT
120VAC
CLASS II
TRANSFORMER
3
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WIRING DIAGRAMS
Figure 5 – Single Stage or Multi-Stage System (No Heat Pump) with Two Transformers
Remove Jumper Wire
between RH & RC
Jumper
O/B
W/E
G
RH
RC
L
Y2
Y
C
W2
System
Single
Stage 1
(SS1)
O
Blower/
Circulator
Fan Energized
on Call for
Cool (and
Heat if
configured
for Electric
Heat)
No
Energized Constantly
in Cool Mode
No Output
Output
Optional
24 Volt
(Com-
mon)
Fault
Indicator
(NOT
24 Volt 24 Volt
(Hot) (Hot)
Heat Cool
Heat
Mode
1st Stage
Cool Mode
1st Stage
B
Energized Constantly
in Heat, Off,
Emergency
Mode
USED)
Cool
Mode
2nd
Multi-
Stage 2
(MS2)
Heat Mode
2nd Stage
Stage
NEUTRAL
24VAC
HOT
120VAC
COOLING
NEUTRAL
120VAC
HEATING
24VAC
HOT
CLASS II
TRANSFORMER
CLASS II
TRANSFORMER
Figure 6 – 3-Wire (SPDT) Heat Only Zone Valve Wiring
Jumper
6
W
G
RH
C
Y
RC
System
Constant
24 Volt
(Com-
mon)
Single Stage
3-wire
Zone Valve
application
24 Volt
(Hot)
Heat
(5)
Closes
Valve
(6)
Opens
Valve
(4)
24 Volt
(Hot)
Cool
Blower/Circulator
Fan Energized
NEUTRAL
24VAC
HOT
120VAC
CLASS II
TRANSFORMER
4
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THERMOSTAT QUICK REFERENCE
Home Screen Description
Figure 7 – Home Screen Display
Room
Temperature
Setting
Temperature
Time of day
Battery Level Indicator
Indicating the current power
level of the 2 “AA” batteries.
Full power remaining.
Mo
Set
P
Half power remaining.
Change
The batteries
Run
should be replaced at this time
with 2 new premium brand
“AA” Alkaline batteries.
SYSTEM
Heat
FAN
Auto
(See page 2 for more details)
Menu
System
Indicator
Fan
Indicator
Figure 8 – Programming & Configuration Items
Programming and Configuration Items
“System On” indicates when heating or cooling stage
is energized, “+2” flashing indicates when a second
1
13
4
14
stage is energized.
Mo Tu We Th Fr Sa Su
P Date
Temp Hold
The word “Hold” is displayed when the thermostat is in
the Hold mode. “Temp Hold” is displayed when
the thermostat is in a Temporary Hold mode.
2
Set
12
8
Month Call For Service Save
Year
Displays “Change Filter” when the system has run for
the programmed filter time period as a reminder to
change or clean your filter.
3
Change
Filter
3
9
Run Hold
10
11
System On +2
1
Auto Sched
Cool Savings
Heat Pump
4
Displays “Set” for setpoint when in Run Program mode.
Set
Schedule
Menu
SYSTEM
Heat Em Auto
CoolOffTime
FAN
On Auto
Displays System Mode (Heat, Em, Auto, Cool, Off)
or “Time” in Menu Mode.
5
6
7
8
9
Displays Fan Mode (On, Auto) in Menu Mode.
Displays “Set Schedule”, “Schedule”, or “Menu”.
Displays “Save” when Cool SavingsTM is working.
6
7
5
“Call For Service” indicates a fault in the heating/
cooling system, it does not indicate a fault in the
thermostat.
12
Displays “Heat Pump” when system is configured
as Heat Pump thermostat.
Displays “Hold” in programmable mode. When not in
Hold mode, displays “Run” in program run mode.
10
Alternates Time of Day and “LOC” when keypad lockout
is enabled.
13
11
Initially displays “Auto Sched”. If Auto Schedule had
been used or disabled, then it displays “Cool Savings”
when in the Cool Mode if Cool Savings has been ena-
bled in the menu.
14
In Configuration Menu, shows screen number. If blank,
thermostat is earlier model and requires instruction sheet
37-7050B.
5
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INSTALLER/CONFIGURATION MENU
To enter the Configuration Menu, SYSTEM must be set to HEAT, COOL, Em or AUTO. Press the Menu button for at least 5
seconds. The display will show item #1 in the table below. Press Menu button to advance to the next menu item. Press
to change an item option.
or
INSTALLER/CONFIGURATION MENU
MENU
SCREEN
NUMBER
MS2/ HP1/
DISPLAYED
Press
or
to
COMMENTS
SS1 HP2 (FACTORY DEFAULT)
select from listed options
01
(OFF) Lk
L
Selects Keypad Lockout.
(Not available on earlier models)
02
03
(000) Lk
(MS 2)
001 to 999
Selects Keypad lockout combination number
SS1, HP1, HP2
Selects Multi-Stage (MS 2 No Heat Pump),
Heat Pump 1 (HP 1, 1 compressor),
or Single Stage (SS 1), Heat Pump 2 (HP 2, 2
compressor or 2 speed compressor)
04
(GAS)
(ELE)
(0) CS
ELE
GAS
1, 2, 3, 4, 5, 6
Select Gas or Electric heat
05
06
07
08
Selects Cool Savings
Value 1 (low) to 6 (high), Value 0 Disables Feature
(On) E
OFF
Selects Energy Management Recovery (EMR)
On or OFF.
(ME)
CR Heat
SL, FA
SL, FA
Adjustable Anticipation:
Selects heating cycle rate for MS or SS
(ME)
CR Cool
Adjustable Anticipation: Selects the cycle
rate for cooling (only when MS2 or SS1
is selected in item 1)
09
10
(ME)
CR Heat Pump
SL, FA
SL
Adjustable Anticipation (Heat Pump)
(only when heat pump is selected in #1)
(FA)
CR Em
Selects the cycle rate for Emergency
mode and Auxiliary stage if Heat Pump is
selected in item 1)
11
12
(OFF) CL
CL On
Compressor Lockout Time
Heat-Auto
Cool-Off
Cool-Off, Heat-Off,
Heat-Fan-Off,
Select System Switch Configuration with automatic
changeover capability
Heat-Cool Auto-Off
13
14
(On) dL
0
dL OFF
Selects Display Light On or OFF
1 HI, 2 HI, 3 HI, 4 HI,
Adjustable Ambient Temperature Display
(current temperature) 1 LO, 2 LO, 3 LO, 4 LO
15
16
17
18
Selects Fahrenheit/Celsius Temperature Display
Selects Limited HEAT Range
°F
°C
L (90) Heat
L (45) Cool
P7
L 62 to L 89
L 46 to L 82
P3
Selects Limited COOL Range
Defaults for 7 day programming (P7) or 5/1/1 day
programming (P3) is available
19
20
21
(On) AS Heat
(On) AS Cool
(On) FA Heat
OFF
OFF
OFF
Automatic Schedule for heat mode.
Automatic Schedule for cool mode.
MS
Fast Heat option may be disabled by
selecting OFF. NA to SS config.
22
HP2
(On) FA Cool
OFF
Fast Cool option may be disabled by
selecting OFF. NA to SS config.
NA to Heat only system.
23
(OFF) CA
Selects active Comfort Alert On or OFF.
Require CA II Module. (Not available on earlier models)
On
24
(On) dS
OFF
Selects Automatic daylight Savings Time
option On or OFF.
25
26
(OFF) Change Filter
(200 h) Change Filter
On
Selects Filter Change-out Indicator On or OFF.
25-1975 h
Change Filter time in 25 hour increments. This
menu only appears if On is selected in above.
27
(o) On Cool
(b) On Heat
Selects operation of the reversing valve terminal (O/B)
output as an O or B terminal.
6
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INSTALLER/CONFIGURATION MENU
1 & 2)Keypad Lockout – This menu selection will display
“Lk” and “OFF” (default, keypad not locked out). The
6) Energy Management Recovery: Energy Management
Recovery (E) On enables the thermostat to start heating
or cooling early to make the building temperature reach
the program setpoint at the time you specify. Heating
will start approximately 5 minutes early for every 1° of
temperature required to reach setpoint.
and
are used to toggle the selection between
OFF and “L” (keypad locked out). When the keypad
lockout selection is enabled “L”, and the MENU button
is pressed again, the display will indicate the number
“0” (default, still disabled) in the time digits. The
Example: E On is selected and your heating is pro-
grammed to 65° at night and 70° at 7 AM. If the build-
ing temperature is 65°, the difference between 65° and
70° is 5°. Allowing 5 minutes per degree, the thermostat
setpoint will change to 70° at 6:35 AM. Cooling allows
more time per degree, because it takes longer to reach
set temperature.
and
are used to set the combination number from 0
to 999. If a combination of 0 is selected and the MENU
button is pressed, the menu will be exited and keypad
will not be locked. If 1 to 999 is selected and the MENU
button is pressed, the combination is stored into memory
and the menu is exited. The “Lk” will display designating
keypad locked with a valid combination. The SYSTEM
button will operate for 10 seconds after the menu mode
is exited to allow the user to change the mode from
“OFF” to the desired SYSTEM mode.
7, 8,9 & 10) Cycle Rate Selection – The factory default
setting for Heat and Cool modes, SS1, MS2, is medium
cycle (ME). For Heat Pump, HP1, HP2, the default set-
ting is medium (ME). For Emer (Aux) the default setting
While the keypad is locked out, a press of MENU will en-
ter the configuration menu. The first menu item displayed
is fast cycle (FA). To change cycle rate, press the
key.
or
is the combination code “0”. The
or
keys are
Cycle rate differentials for different settings are:
used to set the combination unlock number from 0 to
999. If the unlock number matches exactly with the com-
bination lock number stored in memory when the MENU
button is pressed, the keypad is unlocked and the “Loc”
is removed. If the unlock number does not match when
the MENU button is pressed, the combination returns to
“0” for another attempt to set the unlock code. To exit the
menu without unlocking the keypad, press RUN SCHED.
Fast
FA
0.4°F
0.9°F
0.9°F
0.6°F
Medium Slow
MODE
ME
SL
Heat (SS1, MS2)
Cool (SS1, MS2)
Heat Pump (HP1, HP2)
Emer (HP1, HP2)
0.6°F
1.2°F
1.2°F
-
1.7°F
1.7°F
1.7°F
1.7°F
11) Select Compressor Lockout CL OFF or ON – Select-
ing CL ON will cause the thermostat to wait 5 minutes
between cooling cycles. This is intended to help protect
the compressor from short cycling. Some newer com-
pressors already have a time delay built in and do not
require this feature.Your compressor manufacturer can
tell you if the lockout feature is already present in their
system. When the thermostat compressor time delay oc-
curs, it will flash the setpoint for up to five minutes.
12) System Mode Configuration – This thermostat is
configured for Heat and Cool (SYSTEM switch with Cool,
Off, Heat) default. It can also be configured for Heat and
Cool with Auto changeover (Heat, Auto, Cool, Off), Heat
only with fan (Off, Heat), Heat only without fan, Auto only
(Auto, Off), and Cool only (Cool, Off).
To reset the combination code and unlock the keypad if
the code is forgotten, see troubleshooting section.
3) This control can be configured for:
MS 2 – Multi-Stage System (no heat pump)
HP 1 – Heat Pump with one stage of compressor
HP 2 – Heat Pump with two stage compressor or two
compressor system, Gas or Electric backup
SS 1 – Single Stage System
4) GAS or Electric (ELE) fan operation. If the heating sys-
tem requires the thermostat to energize the fan, select
ELE. Select GAS if the heating system energizes the fan
on a call for heat.
5) Select Cool Savings™ value – Selects the amount
of adjustment for the Cool Savings™ feature in Cool
mode with 1 (1°) being the least amount of adjustment
and 6 (6°) being the most amount of adjustment. Default
value is 0 which disables this feature. Selecting a value
greater than 0 will display Cool Savings on the screen
and enable the key for Cool Savings feature. Cool Sav-
ings is an optional energy saving feature that can reduce
your cooling costs. It is based on the principal that lower
indoor humidity makes a slightly higher temperature
feel more comfortable. Cool Savings operates during
periods of high demand which normally occur on the
hottest summer days when a cooling system may run
for hours to reach the thermostat setting. Long cooling
run times also lower the indoor humidity. Cool Savings,
very slowly, adjusts the setpoint temperature to make the
setpoint closer to the displayed room temperature, to a
maximum of the number of degrees you select. Adjust-
ing the setpoint temperature over a long cooling run time
allows the system to reach your set temperature and turn
off. The room temperature will actually be higher than
the thermostat displays but the reduction in humidity will
allow comfort at the slightly higher temperature.
13) Select Backlight Display – The display backlight im-
proves display contrast in low lighting conditions. When
the “C” terminal is powered, selecting backlight CdL ON
will keep the light on continuously. Select backlight OFF
will turn the light on momentarily after any key is pressed.
When the “C” terminal is not powered, the light will be on
momentarily after any key is pressed no matter whether
the backlight is selected ON or OFF.
14) Select Temperature Display Adjustment 4 LO to 4 HI
– Allows you to adjust the room temperature display up
to 4° higher or lower.Your thermostat was accurately cali-
brated at the factory, but you have the option to change
the display temperature to match your previous thermo-
stat. The current or adjusted room temperature will be
displayed.
15) Select F° or C° Readout – Changes the display readout
to Celsius or Fahrenheit as required.
16 & 17) Temperature Limit Range Heat or Cool – This
selection sets the maximum HEAT (13) or minimum
COOL (14) temperature for the setpoint range. Select the
limit temperature using the
or
keys. In the Run
mode, the setpoint temperature will not adjust past the
limit temperature selected. When the limit temperature is
reached, trying to raise or lower the setpoint past the limit
will cause “L” to be displayed in the times digits for about 6
seconds. This feature not available on earlier models.
To turn this feature on in the Cool mode press Cool
Savings. The display will show “Save” next to the
setpoint temperature. When Cool Savings is making ad-
justments to the room temperature display “Save” will be
flashing and the displayed room temperature may vary
within the adjustment range you selected.
If “Save” is not displayed and this feature is OFF, no
change will occur when the cooling system is continu-
ously running during periods of high demand.
18) Program Options: Configured for 7 day or 5/1/1 day pro-
gramming or non-programmable mode. The default set-
ting is P7, indicating 7 day programming. The programs
7
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INSTALLER/CONFIGURATION MENU
thermostat. (Refer to Comfort Alert Yellow Alert Codes
in Troubleshooting section.) If a Comfort Alert module is
not connected, or to disable active protection, turn this
feature OFF. If a Comfort Alert module is connected and
this feature is turned OFF, the thermostat will still receive
and flash the fault codes from the Comfort Alert module,
but the active protection will not be enabled to protect the
compressor.
per week can be changed to P3 by pressing the
or
keys. A selection of 0 Days for non-programmable
will eliminate the need for EMR, and that step in the
menu will be skipped.
19 & 20) Select Automatic Schedule – With just one touch
of the AUTO SCHEDULE button this feature allows
you to program a desired comfort temperature into all
the program periods along with a 6° set back for night
periods of both Heat and Cool programs. Factory default
is “On” for both. When Heat AS On and Cool AS On
are activated while in Heat or Cool mode, select desired
setpoint temperature and press AUTO SCHEDULE. This
value will be copied into all the morning, day and evening
program periods. The night program periods will have a
6°F set back.
24) Select Daylight Saving Time Calculation – This feature
will allow the thermostat to calculate the DST automati-
cally and apply it to the Real Time Clock display. Default
On. Use
or
buttons to select the feature OFF.
25 & 26) Select Filter Replacement Reminder and Set
Run Time – Select the “Change Filter” reminder On
or OFF. If selected On, press MENU to select the time
period from 25 to 1975 hours in 25 hours increments.
In a typical system, 200 hours (default) of run time is
approximately 30 days. After the selected time of blower
operation, the thermostat will display “Change Filter”
as a reminder to change or clean your air filter. When
“Change Filter” is displayed, press MENU or RUN but-
ton to clear the display and restart the time to the next
filter change.
21 & 22) Select Fast Second Stage ON or OFF – Heat
pump or Multi-stage only, in the run mode, with the fast
Heat feature enabled (FA Heat On), if the Heat setpoint
temperature is manually raised by 3°F (2°C) or more
above the actual temperature using
the second
stage will energize immediately. With FA OFF, second
stage will not energize until the setpoint temperature is
1°F or more above actual temperature for more than ten
minutes. The Fast Cool feature (FA Cool) provides the
same controls when the setpoint temperature is lowered.
27) Select Reversing Valve Output – The O/B option is
factory set at “O” position. This will accommodate the
majority of heat pump applications, which require the
23) Comfort Alert with Active Protection – Turn this
feature ON to enable active protection. This allows the
thermostat to identify fault codes sent by the Comfort
Alert module when compressor damage is possible and
react to those codes by turning the compressor off. Fault
codes from the Comfort Alert module will flash on the
changeover relay to be energized in COOL. If the
thermostat you are replacing or the heat pump being
installed with this thermostat requires a “B” terminal, to
energize the changeover relay in HEAT, the O/B option
should be set at “B” position.
OPERATINGYOUR THERMOSTAT
IMPORTANT!
Choose the Fan Setting (Auto or On)
Press the FAN button to Auto or On.
Program Override (Temporary Override)
Press
or
buttons to adjust the temperature. This
Fan Auto is the most commonly selected setting and runs the
fan only when the heating or cooling system is on.
Fan On runs the fan continuously for increased air circulation
or to allow additional air cleaning.
will override the temperature setting for two hours minimum
or until the next programmed time. To cancel the temporary
setting at any time and return to the program, press RUN. If
the SYSTEM button is pressed to select AUTO the thermostat
will change to Heat or Cool, whichever ran last. If it switches
to heat but you want cool, or it changes to cool but you want
Choose the System Setting
(Heat, Off, Cool, Auto, Emer)
Press the SYSTEM button to select:
heat, press both
and
buttons simultaneously to
change to the other mode.
Heat: Thermostat controls only the heating system.
Off: Heating and Cooling systems are off.
Second Stage Time Delay
Your thermostat is designed to determine the optimum time
to activate the second stage. Simply raising the temperature
in heating or lowering it in cooling will not always force the
thermostat to bring the second stage on quickly. There is a
time delay from 0-30 minutes depending on the performance
of the first stage of the system.
Cool: Thermostat controls only the cooling system.
Auto: Auto Changeover is used in areas where both heating
and cooling may be required on the same day. AUTO allows
the thermostat to automatically select heating or cooling
depending on the indoor temperature and the selected heat
and cool temperatures. When using AUTO, be sure to set the
Cooling temperatures more than 1° Fahrenheit higher than
the heating temperature.
EXAMPLE: For the last 2 hours the thermostat is set on 70°
and the room temperature is 70° with the equipment using
only the first stage of heat. Since the equipment is keeping
the temperature within 1° of setpoint, the thermostat will
delay second stage for a longer time if you manually raise
the temperature or if the room temperature quickly changes.
Once the second stage comes on, it will come on sooner the
next time there is a difference between the setpoint and the
room temperature. The net effect of the staging program is
that when the first stage is capable of making temperature
the second stage will delay longer. When the thermostat
calculates that first stage cannot make temperature in a
reasonable time, the second stage will come on sooner. This
built in function automatically optimizes the use of additional
stages of heat or cool.
Em: (Heat Pump models) Thermostat controls only backup
heating system.
Manual Operation (Bypassing the Program)
Programmable Thermostats
Press
or
and then the HOLD button and adjust the
temperature wherever you like. This will override the program.
The HOLD feature bypasses the program and allows you
to adjust the temperature manually, as needed. Whatever
temperature you set in HOLD will be maintained 24 hours a
day, until you manually change the temperature or press RUN
to cancel HOLD and resume the programmed schedule.
8
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PROGRAMMING
Set Current Time and Date
1) Press Menu and then Time button once. The display
will show the hour only.
4) Press
or
button to change the temperature to
your selected temperature for the 1st heating period.
5) Press TIME button, time will flash.
2) Press and hold either the
or
button until you
6) Press
1st period.
7) The time will change in 15 minute increments.
8) After you have set the time and the temperature for
the period to begin, press SCHEDULE to advance to the
next program period.
9) Repeat steps 2 through 8 until all of the program times
and temperatures are set for all program periods on
that day.
10) Press SCHEDULE to the next day and repeat steps 2
through 9.
11) When programming is complete and all of the times and
temperatures match your desired heating schedule, press
RUN. The thermostat will now run your program.
or
button to adjust the start time for the
reach the correct hour and AM/PM designation (AM
begins at midnight, PM begins at noon).
3) Press TIME once again. The display window will show
the minutes only.
4) Press and hold either the
reach the correct minutes.
or
button until you
5) Additional presses of TIME will advance the display to
show the year, month and date of month. Press the
or
button to change the display to the correct set-
ting for each.
6) Press RUN to exit the TIME mode.
Enter the Heating Program
1) Press SYSTEM button to select “Heat” in the system
switch area indicating the active mode being pro-
grammed.
Enter the Cooling Program
1) Press SYSTEM button to select “Cool” in the system
switch area indicating the active mode being pro-
grammed.
2) Press the MENU button and then press SCHEDULE.
3) The top of the display will show the day(s) being pro-
grammed. The time and temperature (flashing) are also
displayed. “1” will also be displayed to indicate the period.
2) Follow Enter Heating Program instructions for entering
cooling times and temperatures.
Energy Saving ENERGY STAR® Factory Pre-Program
The programmable thermostats are programmed with the energy saving settings shown in the table below for all days of the
week. If this program suits your needs, simply set the thermostat clock and press the RUN button. The table below shows the
factory set heating and cooling schedule for all days of the week.
Wake Up
(Period 1)
Leave For Work
(Period 2)
Return Home
(Period 3)
Go To Bed
(Period 4)
Heating
6:00 AM
6:00 AM
70°F
75°F
8:00 AM
8:00 AM
62°F
83°F
5:00 PM 70°F 10:00 PM
5:00 PM 75°F 10:00 PM
62°F
78°F
Program
Cooling
Program
PlanningYour Program – Important
If you are re-programming a 5+1+1 fill in your own times and
The Heating and Cooling Program schedules below allow you temperatures directly below the factory times and tempera-
to pencil in your own program times and temperatures.
The thermostat comes configured for 7 day programming
and can also be configured for 5/1/1 day programming (see
configuration section).
tures.
Keep the following guidelines in mind when planning your
program.
• In Heating, lower temperatures will save energy.
Factory settings are listed on Monday through Friday, Satur-
day and Sunday. If you are re-programming a 7 day schedule,
pencil in all lines with the times and temperatures you want.
• In Cooling, higher temperatures will save energy.
• If you plan on using Auto Changeover, do not program
the heating higher than the cooling.
9
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PROGRAMMING
Worksheet for Re-Programming 7 Day and 5+1+1 Day Program
Heating
Program
Wake Up
(Period 1)
Leave For Work
(Period 2)
Return Home
(Period 3)
Go To Bed
(Period 4)
6:00 AM
70°F
8:00 AM
62°F
5:00 PM
70°F
10:00 PM
62°F
MON
TUE
WED
THU
FRI
6:00 AM
6:00 AM
70°F
70°F
8:00 AM
8:00 AM
62°F
62°F
5:00 PM
5:00 PM
70°F
70°F
10:00 PM
10:00 PM
62°F
62°F
SAT
SUN
Cooling
Program
Wake Up
(Period 1)
Leave For Work
(Period 2)
Return Home
(Period 3)
Go To Bed
(Period 4)
6:00 AM
75°F
8:00 AM
83°F
5:00 PM
75°F
10:00 PM
78°F
MON
TUE
WED
THU
FRI
6:00 AM
6:00 AM
75°F
75°F
8:00 AM
8:00 AM
83°F
83°F
5:00 PM
5:00 PM
75°F
75°F
10:00 PM
10:00 PM
78°F
78°F
SAT
SUN
TROUBLESHOOTING
Comfort Alert Codes
Comfort AlertYellow Alert Codes
The Comfort Alert diagnostics product monitors the air
conditioning outdoor systems with single phase Copeland
Scroll compressors. Abnormal system and electrical
conditions are indicated by flashing ALERT codes on the
yellow LED on the Comfort Alert module. The flash codes are
transmitted to the thermostat by the Comfort Alert Thermostat
interface module. The Comfort Alert compatible thermostat
displays “Call For Service” that flashes at the same rate as
the yellow LED on the Comfort Alert module.
1 Flash
Long run time
System pressure trip
Short cycling
2 Flashs
3 Flashs
4 Flashs
5 Flashs
6 Flashs
7 Flashs
8 Flashs
9 Flashs
Locked rotor
Open circuit
Open start circuit
Open run circuit
Welded Contactor
Low voltage
10
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TROUBLESHOOTING
Reset Operation
function correctly contact your heating/cooling service person
or place of purchase.
Note: When thermostat is reset, installer configuration menu
settings and programming will reset to factory settings.
If a voltage spike or static discharge blanks out the display
or causes erratic thermostat operation, you can reset the
thermostat by removing the wires from terminals R and C
(do not short them together) and removing batteries for 2
minutes. After resetting the thermostat, replace the wires and
batteries. If the thermostat has been reset and still does not
Note: Be sure to review the installer configuration menu
settings.
To reset the programming, clock and configuration settings,
press
and
and the FAN button simultaneously. The
thermostat should go blank and then all segments will be
displayed momentarily.
Symptom
Possible Cause
Correction Action
No Heat/No Cool/No Fan
(common problems)
1. Blown fuse or tripped circuit breaker.
2. Furnace power switch to OFF.
3. Furnace blower compartment door or
panel loose or not properly installed.
4. Loose connection to thermostat or
system.
Replace fuse or reset breaker.
Turn switch to ON.
Replace door panel in proper position to engage safety
interlock or door switch.
Tighten connections.
No Heat
1. Pilot light not lit.
Re-light pilot.
2. Furnace Lock-Out Condition. Heat
may also be intermittent.
Many furnaces have safety devices that shut down when
a lock-out condition occurs. If the heat works intermittently,
contact the furnace manufacturer or local HVAC service
person for assistance.
3. Heating system requires service or
thermostat requires replacement.
Diagnostic: Set SYSTEM Switch to HEAT and raise the
setpoint above room temperature. Within a few seconds
the thermostat should make a soft click sound. This sound
usually indicates the thermostat is operating properly. If
the thermostat does not click, try the reset operation listed
above. If the thermostat does not click after being reset
contact your heating and cooling service person or place
of purchase for a replacement. If the thermostat clicks,
contact the furnace manufacturer or a HVAC service
person to verify the heating is operating correctly.
No Cool
1. Cooling system requires service or
thermostat requires replacement.
Same as diagnostic for No Heat condition except set the
thermostat to COOL and lower the setpoint below the room
temperature. There may be up to a five minute delay before
the thermostat clicks in Cooling.
1. Possible short in wiring.
2. Possible short in thermostat.
Check each wire connection to verify they are not shorted
or touching together. No bare wire should stick out from
Heat, Cool or Fan
Runs Constantly
3. Possible short in heat/cool/fan system. under terminal block. Try resetting the thermostat as
4. FAN Switch set to Fan ON.
described above. If the condition persists, the manufacturer
of your system or service person can instruct you on how
to test the Heat/Cool system for correct operation. If the
system operates correctly, replace the thermostat.
Thermostat Setting &
Thermostat Thermometer
Disagree
1. Thermostat thermometer setting
requires adjustment.
The thermometer can be adjusted +/- 4 degrees. See
Temperature Display Adjustment in the Configuration Menu
section.
Furnace (Air Conditioner)
Cycles Too Fast or Too
Slow (narrow or wide
temperature swing)
1. The location of the thermostat and/or
the size of the Heating System may
be influencing the cycle rate.
Digital thermostats provide precise control and cycle faster
than older mechanical models. The system turns on and off
more frequently but runs for a shorter time so there is no
increase in energy use. If you would like an increased cycle
time, choose SL for slow cycle in the Configuration menu,
step 6 (heat), 7 (cool) or 8 (heat pump). If an acceptable
cycle rate is not achieved, contact a local HVAC service
person for additional suggestions.
Forgot Keypad Lockout
Code
Hold MENU key for 20 seconds and the lockout will reset.
Thermostat does not have
Menu Screen Numbers
1. Earlier version of thermostat.
Refer to Instruction Sheet 37-7050B.
11
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HOMEOWNER HELP LINE: 1-800-284-2925
White-Rodgers is a division
of Emerson Electric Co.
The Emerson logo is a
trademark and service mark
of Emerson Electric Co.
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