4
9)
Carefully place the thermostat body face down on a soft surface to expose the main circuit board. Gently
set the following switches in the correct position for the application.
•
GAS / ELECTRIC:
Configures the thermostat to either gas/oil or electric heating systems. For electric,
set the switch to HE. For gas, set the switch to HG.
•
C / F:
Sets the display in either Celsius or Fahrenheit.
10)
Attach the thermostat body to the back plate by resting the top of the thermostat body on the two clips on
the upper portion of the back plate. Then gently press the front body into place until the bottom locking
tab snaps into place. NOTE: The terminal board pins must be properly aligned with the sockets on the
terminal board (on the back plate) in order for the front body to properly snap into place.
11)
Set the system switch to the
OFF
position.
12)
Set the fan switch to the
AUTO
position.
13)
Open the front thermostat door and open the battery compartment door; install 2 AA Alkaline batteries
(included). Note: Thermostat can operate on battery power or 24VAC (with batteries acting as back-up
power). Thermostat must be operated on 24VAC in order for the AUX LED to illuminate when the second
stage is initiated.
14)
Remove the clear plastic film from the LCD.
Testing The New Thermostat
WARNING!
• Do not switch the system to cool if the outdoor temperature is below 50 F (10 C). This may damage the
cooling system and may cause personal injury.
• This thermostat is equipped with automatic compressor protection to prevent damage due to short
cycling. The short cycle protection provides a 5-minute delay between cooling cycles to prevent the
compressor from being damaged.
70814-IM 12/22/06 2:00 PM Page 4