4. If the system selector is in AUTO mode, the current
operating mode will be used for programming.
5. After 15 seconds without a key press, the thermostat
will return to normal display mode.
6. When setting the program time, note the AM/PM indicator.
7. With the Auto Recovery feature enabled, you do not need
to set your comfort program times early. Auto Recovery
will turn your system on so that the room is comfortable
at the program time.
Weekday/Weekend Programming
Weekday Programs
Display Reads
• Normal display of time, temperature, and
day of the week.
Step 1
• Selects days Mon. to Fri. for same set
of 4 programs each day.
Step 2
• Program indicator (1) is displayed.
• 68ºF is displayed.
• Mon. to Fri. is displayed.
Step 3
• Press and hold until 6:00 is displayed.
• Note AM/PM
Step 4
• Press once to change temperature to 69ºF.
• Weekday program 1 is complete.
• Press PROG to move to program 2, 3, and 4
and follow the same steps.
Use to insert or change time and
temperature of other programs.
• Selects weekend days Sat. and Sun.
for same set of 4 programs each
weekend day.
• Follow steps 2-4 to enter programs.
Similar to weekday programming.
Use to insert weekend programs.
Individual Day Programming
To program each individual day separately by a differnet
set of programs, first select day by displaying the day of
program, then insert the desired times and temperatures.
Press
Display
Reads
• Mon. to Fri. are selected. Mon. to Fri.
will have same programs.
• Sat. to Sun. will have same programs.
• Mon. is seleted, program for Mon. only.
Use to enter programs for Monday.
Similarly
• Tue. to Sun. can be selected.
Display the day to be programmed and use
to enter programs.
NOTE: Another approach to programming is to first
program all weekdays Mon. through Fri. and Sat. and
Sun. as same programs. Then, display and change the
programs of only those days which willhave different
programs.
Reviewing Programs
You may want to review the programs to see that the
settings are compatible with your lifestyle.
• Normal display of current time, day of week
temperature, and day of week.
• 1st weekday program is displayed.
• Program indicator (1) appears.
• Mon to Fri indication appears.
• Continue pressing to view each day.
• Continue pressing to view each period.
If you are armchair programming the thermostat, turn the
System Selector to the OFF position
Reviewing the Current Temperature Setting
Current time and temperature.
• Press less than 1 second.
• Set temperature is shown above
current room temperature.
OPERATION
System Selector Switch
The System Selector switch on the front of the
thermostat determines the operating mode of
the thermostat. You may select COOL, OFF,
HEAT, or AUTO. In order to take full advantage
of this thermostat’s features, we recommend using
the AUTO mode. Refer to the
Auto Season Changeover
information for using this feature.
NOTE:
Anytime you install or remove the
thermostat from the wallplate, slide the
System Selector to the OFF position to
prevent the possibility of a rapid system
on-off.
Fan Switch
The Fan switch should normally be set in the AUTO position.
The fan will be turned on along with normal operation of
your system. In a normal gas or oil furnace, the fan will
be turned on by your furnace after its warm-up delay. For
electric heat, air conditioning, and heat pump operation, the
fan will turn on with the system. To run the fan continuously,
slide the Fan switch to the ON position.
Temporary Manual Override
To temporarily change the current set
temperature without affecting your program:
• Press and hold or for less than 1
second to enter Manual Override mode.
• Press and to change to your desired new
temperature.
• Press to RUN to normal mode or wait 15 seconds
for it to return automatically.
• The current program number will flash to signify
the Temporary Override.
At the next program change, the Temporary Override is
canceled, and the next program temperature becomes the
setpoint temperature.
To end the Temporary Manual Override:
• Press and wait for HOLD to display on the LCD.
• Press HOLD key twice. This will return the set
temperature to the current program set temperature.
NOTE:
The Auto Season Changeover feature will not operate
while the thermostat is in Temporary Manual Override.
Refer to the Auto Season Changeover feature for more
information.
Permanent Override or a Designated Day Override
To hold your Manual Override for vacation or until a
Designated Day.
• Press to make the current program tem-
perature the HOLD temperature. HOLD
will be displayed on the LCD, and the
program number will disappear.
• Follow the Temporary Manual Override instructions
above to change the Permanent Manual Override
temperature.
• You can confirm the setpoint by pressing HOLD/RUN
for less than 1 second.
• Press again. Hold day will be displayed on the LCD
and the clock will disappear
• Press Day key to add override days. Press Hour key
to reduce override days.
• Follow the Temporary/Designated Day
Override instructions above to change
the Permanent Manual Override
temperature.
To End Override:
Under Permanent Override press hold/return key twice.
Under a Designated Day Override press the hold once. The
thermostat will return to the current program, and the HOLD
display will be canceled.
NOTE:
The Auto Season Changeover feature will not operate
while the thermostat is in permanent Manual Override. Refer
to the Auto Season Changeover
feature for more information.
Auto Season Changeover
When the System Selector is in AUTO position, the thermo-
stat will automatically change between heating and cooling
systems, depending on your program. We recommend keep-
ing your programmed heating and cooling temperature at
least 4ºF (2ºC) apart to allow the Auto Season Changeover
to occur when the appropriate temperature span has been
reached. If your heating and cooling programs have set-
points that are close, there is a built-in program to prevent
the thermostat from going into Temporary, Designated Day
Override, or Permanent Override, as these overrides are
energy saving settings. Auto Season Changeover will still
function in Home Today mode, as this is a comfort setting.
For example, you may have the following temperatures pro-
grammed at a given time: Heat Set Temp=68ºF, Cool Set
Temp=78ºF.
If the room temperature rises above 78ºF, then the thermo-
stat will automatically change to cool mode and turn on the
air conditioner.
Likewise, the thermostat will automatically change to heat
mode and turn on heat when the room temperature falls
below 68ºF.
HOME TODAY
This feature allows you to quickly and temporarily override
your energy saving program setting on days when you are
normally away from home with one key press.
• Press to enter the Home Today override.
When in Home Today override, the
thermostat will use the previous manual
override temperature setpoint for the
remainder of the day.
• The display will alternate between HOME and the
current time.
• When pressed during the day, the thermostat will
remain in Home Today mode until the first program
of the next day.
• If the system is changed between Heat and Cool
modes (either manually or by Auto Season
Changeover) during the Home Today Override period,
the setpoint temperature will be automatically
update. It will automatically change from the lowest
cool program setpoint to the highest heat program
setpoint.
• Press to exit Home Today mode before the schedule
ending time. HOME is no longer displayed on the
LCD screen, and the thermostat returns to the
current program.
• You can manually change the setpoint temperature
while in Home Today mode. Refer to the Temporary
Manual Override instructions. Manually changing the
set temperature while in Home Today mode will not
affect the Home Today ending time, however, the set
temperature will not change automatically with a
manual or automatic change between heating and
cooling.
Energy Monitor
• The Energy monitor feature measures
and stores the amount of time the heat-
ing and air conditioning system oper-
ates. Usage can be displayed for Today
(since 12 am), Yesterday, This Week (since Monday),
Last Week (last Monday through Sunday), and Total
(up to 999 Hrs). By monitoring your energy usage,
you see how much the setback periods are saving,
and you can test program adjustment to save even
more. To review energy usage, press to cycle
through Today, Yesterday, This Week, Last Week,
and Total. Press again to return to normal mode, or
wait 15 seconds for the display to return to normal
mode. You can also return to normal mode at any
time by pressing RUN.
• For example: This LCD display shows Today’s
usage to be 10 Hours, 26 minutes.
• Press and hold for 3 seconds to reset the Energy
Monitor’s counters.
The display will blink, and counters will be cleared
to zero.
NOTE:
Clearing the Energy Monitor counter will also clear
the Filter Monitor counter, as Filter usage and Total Energy
usage are the same. Also, clearing the Filter Monitor counter
will clear ALL Energy Monitor counters as well.
Filter Monitor
Your thermostat also keeps a record of the
number of hours your filter has been in use. To
maximize your system’s performance and energy
efficiency, change or clean your filter regularly.
• When the total system run time for heat and
cool reaches 500 hours, you need to clean or
change your system’s filter. FILT will continue
to flash until the counter is set back to zero.
• Press FILTER to review total filter usage. The display will
blink FILT, then show the Filter Monitor counter. After 15
seconds, the display will return to normal mode, or you
can hit RUN to exit immediately.
The Filter Monitor will display up to 999 hours and 59
minutes of usage.
• To reset the Filter Monitor counter, depress FILTER for
3 seconds. The display will blink, and the counter will be
reset to zero.
NOTE:
Clearing the Filter Monitor counter will also clear ALL
Energy Monitor counters, as Filter usage and Total Energy
usage are the same. Also, clearing the Energy Monitor
counters will clear the Filter Monitor counter as well.
Auto Recovery
Auto Recovery calculates how early to turn your
system back on, so that the room temperature is
already comfortable by the start of the program
period. Auto Recovery works in both Heat and
Cool modes.
• When the thermostat is in Auto Recovery mode, the
display will alternate RECO with time, and the program
indicator will flash.
352-00021-004 Rev B 5/08