Installation and User Guide
10
Pub. No. 18HD54D1-1B-EN
03/2020
Part No.
37-7770002
5.2 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 SETPOINT STORAGE
— You can enter both your heating and cooling setpoints at the
same time. There is no need to re-enter the thermostat at the beginning of each season.
•
TEMPERATURE SETTING
— Press
or
until the display shows the temperature you want. The thermostat will keep the
room temperature at the selected temperature.
•
°F/°C CONVERTIBILITY
— The factory default setting is Fahrenheit. Clipping W904 jumper on the circuit board will alter this
feature to Celsius temperature setting. See diagram on page 11.
•
LOW BATTERY INDICATOR
— If the 2 “AAA” alkaline batteries are low and should be replaced, the display will be blank except for
. When the batteries are low, pressing any button will cause the display to operate for ten seconds. After ten seconds,
the display will be blank except for
. After
has been displayed for 4 weeks, the thermostat will raise the
temperature 10° above your setpoint in
COOL
mode and drop the temperature 10° below your setpoint in
HEAT
mode.
•
TEMPERATURE DISPLAY ADJUSTMENT
— Your new thermostat has been accurately set in our factory. However, if you wish,
you may adjust your new thermostat temperature display to match your old thermostat. This can be accomplished (within a ±3°
range) as follows:
1. Press
or
at the same time for two seconds with the SYSTEM switch in
OFF
position.
2. Press
or
to adjust the displayed temperature to your desired setting
3. Move SYSTEM switch from
OFF
to exit the feature
•
DISPLAY BACKLIGHT
— The display backlight improves display contrast in low lighting conditions. Selecting backlight ON will turn
the light on for a short period of time after any button is pressed. Selecting backlight OFF (default) will keep the light off. Turn the
display backlight feature ON as follows:
1. Press
and
at the same time for two seconds with the SYSTEM switch in HEAT position. The display will alternately show
“-L” AND “FF” (off).
2. Press
or
to change “FF” to “ON.”
3. Move SYSTEM switch to OFF to exit the feature.
