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5
OPERATION
Before you begin programming your thermostat, you should be
familiar with its features and with the display and the location and
operation of the thermostat buttons. Your thermostat consists of
two parts: the thermostat cover and the base. To remove the
cover, gently pull it straight out from the base. To replace the
cover, line up the cover with the base and press gently until the
cover snaps onto the base.
THE THERMOSTAT BASE
Other than and , the following buttons and switches are
located behind the door on the bottom of the thermostat cover
(see fig. 6). Pull the door down to open it.
The Thermostat Buttons and Switches
1
(Red arrow) Raises temperature setting.
2
(Blue arrow) Lowers temperature setting.
3
SET TIME button.
4
VIEW PRGM (program) button.
5
RUN PRGM (program) button.
6
HOLD TEMPerature button.
7
FAN switch (ON, AUTO).
8
SYSTEM switch (COOL, OFF, HEAT).
The Display
9
Indicates day of the week.
10
HEAT is displayed when the SYSTEM switch is in the HEAT
position. COOL is displayed when the SYSTEM switch is in
the COOL position. COOL is displayed (flashing) when the
compressor is in lockout mode.
11
Alternately displays current time and room temperature.
12
Displays currently programmed set temperature (this is
blank when SYSTEM switch is in the OFF position).
13
The word HOLD is displayed when the thermostat is in the
HOLD mode.
OPERATING FEATURES
Now that you are familiar with the thermostat buttons and
display, read the following information to learn about the many
features of the thermostat.
• SIMULTANEOUS HEATING/COOLING PROGRAM
STORAGE — When programming, you can enter both your
heating and cooling programs at the same time. There is no
need to reprogram the thermostat at the beginning of each
season.
• TEMPERATURE OVERRIDE — Press or until the
display shows the temperature you want. The thermostat
will override current programming and keep the room
temperature at the selected temperature until the next
program period begins. Then the thermostat will automati-
cally revert to the program.
Figure 6. Thermostat display, buttons, and switches
3
2
1
4 5 6 7 8
SU
HOLD
SA
COOL 1+2
AM
MO TU WE TH FR
HEAT 1+2
9 910
101112 13
11
COOL-OFF-HEAT
AUTO
SET TIME VIEW PRGM RUN PRGM HOLD TEMP FAN ON SYSTEM
• HOLD TEMPERATURE — The thermostat can hold any
temperature within its range for an indefinite period, without
reverting to the programmed temperature. Press HOLD
TEMP button. HOLD will be displayed. Then choose the
desired hold temperature by pressing or . The ther-
mostat will hold the room temperature at the selected
setting until you press RUN PRGM button to start program
operation again.
• °F/°C CONVERTIBILITY — Press SET TIME and HOLD
TEMP buttons until the temperature display is in Celsius
(°C). To display Fahrenheit (°F), repeat the process.
• TEMPERATURE DISPLAY ADJUSTMENT — Your new
thermostat has been accurately set in our factory. However,
if you wish, you may adjust your new thermostat tempera-
ture display to match your old thermostat. This can be
accomplished (within a ±4°F range) as follows:
1. Press VIEW PRGM and HOLD TEMP buttons at the
same time.
2. Press or to adjust the displayed temperature to
your desired setting.
3. Press RUN PRGM to resume normal program opera-
tion.
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.
For maximum comfort and efficiency, keep the following guide-
lines in mind when planning your program.
• When heating (cooling) your building, program the tem-
peratures to be cooler (warmer) when the building is vacant
or during periods of low activity.
• During early morning hours, the need for cooling is usually
minimal.
(Instructions continue on page 6.)