
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,
se the switch to HE. For gas, set the switch to HG.
•
C / F: Sets the display in either Celsius or Fahrenheit.
•
NORM / HP: Configures the thermostat for normal heating/cooling systems or heat pump systems (sin-
gle stage).
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.
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 heating (heat pump models) or
cooling cycles to prevent the compressor from being damaged.
1) Restore the system power. The LCD (liquid crystal display) will
alternately display the time and room temperature. The LCD will
illuminate at the touch of the red or blue arrow keys. LCD will
return to its normal state after 10 seconds.
Image shows display altering between time and a
room temperature of 70
70810-IM 12/21/06 2:52 PM Page 4
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