PROGRAMMING
17
Differential Setting
The second stage will turn ON at 2x the differential setting and OFF at 1x the differential
setting. For example, if the differential setting is 0.5° for heating and the thermostat is set at
70°F, the rst stage will turn on at 69.5°F. The second stage will turn on at 69°F and turn off at
69.5°F. If the third stage is used, the third stage will turn on at 68.5°F and turn off at 69°F.
Keypad Lockout
The installer can activate a keypad lockout after exiting Tech Setup.
Auto Changeover
In Auto mode, users can toggle between Auto Heat or Auto Cool by pressing System only
when the current mode has reached its temperature set point. To switch out of Auto mode,
hold down System. To return to Auto mode, toggle the System key to Auto.
Reminders
Once a Reminder has been turned on and set, the elapsed time can be checked by navigating
the Tech Setup step. The time can be reset by pressing and holding the third button from the
left for 3 seconds. Resetting an expired Reminder can be done by pressing and holding the
3rd button from the left for 3 seconds.
Contractor Call Number
If contractor call number is selected ON, the selected phone number will show in the display if
there has been a continuous call for heating or cooling for 24 hours or if the FAN button is held
down for 3 seconds. To remove the phone number from the display, hold the FAN button down
for 3 seconds.
Programming Notes
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