RESET FILTER BUTTON — The Reset Filter button is used by the service
person to reset the Service Filter icon display.
If the Reset Filter button is pressed during normal thermostat operation,
the number of hours of fan operation is displayed.
KEYPAD LOCK — The thermostat has a keypad lockout feature which will
not acknowledge front panel buttons until the lockout sequence is entered. To
disable or lock the keypad, press and hold the Mode button. While holding
down the Mode button, press the UP and DOWN ARROW buttons simul-
taneously. The
9
Locked
9
icon will appear on the display.
The thermostat is unlocked by performing the same procedure. Press and
hold the Mode button. While holding down the Mode button, press the UP
and DOWN ARROW buttons simultaneously. The
9
Locked
9
icon will be re-
moved from the display.
OPERATION
Mode —
The Mode button selects the operating mode of the thermostat. If
OFF is selected, the thermostat will not enter Heating or Cooling mode. If
HEAT is selected, the thermostat will only enter Heating mode (if the room
temperature is below the heating set point). If COOL is selected, the ther-
mostat will only enter Cooling mode (if the room temperature is above the
cooling set point). If AUTO is selected, the thermostat will enter Heating or
Cooling mode based on the room temperature and the heating and cooling set
points.
Two-Stage Operation —
The second stage of heat or cool is turned on
when the first stage has been on for a minimum of 2 minutes and the tem-
perature differential from the set point is equal to or greater than the set point
plus the deadband plus 2 degrees.
Electric Heat —
When the Electric Heat option in the advanced set up is
set to ON, the thermostat will turn on the fan immediately any time there is
a heat demand. This feature should only be used on electric heating appli-
cations. Do not use with gas heat.
Dry Contact Switch/External Control —
A dry contact switch is pro-
vided to allow an external device to force the thermostat into Unoccupied
mode. When the thermostat is forced into Unoccupied mode via the dry con-
tact closure, the Unoccupied mode icon will blink each second.
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