CHECK THERMOSTAT OPERATION
CONTINUED FROM THIRD PAGE
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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 body and the base. To remove the
body, gently pull it straight out from the base. To replace the body,
line up the body with the base and press gently until the body
snaps onto the base.
The Thermostat Buttons and Switches
1 (Up arrow) Raises temperature setting.
2 (Down arrow) Lowers temperature setting.
3
TIME button.
4 PRGM (program) button.
5 RUN (program) button.
6 HOLD button.
7 FAN switch (ON, AUTO).
8 SYSTEM switch (COOL, OFF, HEAT).
The Display
9 Indicates day of the week.
10
is displayed when the SYSTEM switch is in the HEAT
position.
is displayed (non-flashing) when the SYSTEM
switch is in the COOL position.
is displayed (flashing)
when the compressor is in lockout mode.
11 Alternately displays current time and temperature.
12 “LO BATTERY” is displayed when the 2 “AAA” batteries are
low and should be replaced. Nothing else will be displayed.
13 Displays currently programmed set temperature (this is blank
when SYSTEM switch is in the OFF position).
14 “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 STOR-
AGE — 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 tempera-
ture at the selected temperature until the next program period
begins. Then the thermostat will automatically revert to the
program.
• HOLD TEMPERATURE — The thermostat can hold any
temperature within its range for an indefinite period, without
reverting to the programmed temperature. Press HOLD
button. “HOLD” will be displayed. Then choose the desired
temperature by pressing
or
. The thermostat will
hold the room temperature at the selected setting until you
press the RUN button to start program operation again.
• ENERGY MANAGEMENT RECOVERY — Energy Manage-
ment Recovery (EMR) causes 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 5
minutes early for every 1
°
of temperature required to reach
setpoint. Cooling will start approximately 15 minutes early for
every 1
°
because it takes longer to reach temperature.
Clipping W903 jumper will disable EMR.
Example: You select EMR and have your heating pro-
grammed to 65
°
at night and 70
°
at 7 AM. If the building
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.
•
°
F/
°
C CONVERTIBILITY — The factory default setting is
Fahrenheit. Clipping W904 jumper on the circuit board (see
fig. 1) will alter this feature to Celsius temperature setting.
• LOW BATTERY INDICATOR — If the 2 “AAA” alkaline batter-
ies are low and should be replaced, the display will be blank
except for “LO BATTERY”. When the batteries are low, press-
ing any button will cause the display to operate for ten seconds.
After ten seconds, the display will return to blank except for
“LO BATTERY”. After “LO BATTERY” has been displayed
for 4 weeks, the thermostat will raise the temperature 10
degrees above your setpoint in COOL mode and will drop
temperature 10 degrees below your setpoint in HEAT mode.
You cannot program with low batteries, but you can override
setpoint temperature.
Figure 8. Thermostat display, buttons and switches
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