About Advanced Features & Operation
Page 10
2 STAGE OPERATION - The 2nd Stage of heat or cool is
turned on when (1) the 1st Stage has been on for a
minimum of two minutes, and (2) the temperature spread
from the setpoint is equal to or greater than: the setpoint
plus the deadband, plus 2 degrees.
Heat
Setpoint
Cool
Setpoint
Dead
Band
Dead
Band
2 degrees
2 degrees
1st Stage
turn on
2nd Stage
turn on
1st Stage
turn on
2nd Stage
turn on
Heating
Cooling
MINIMUM HEAT/COOL SETPOINT DIFFERENCE - The Heat
and Cool setpoints will not be allowed to come any closer
to each other than the value set in Advanced Setup step
# 8, on page 7. This minimum difference is enforced
during Auto changeover operation.
and Program On
EMERGENCY HEAT - Is a feature available to Heat Pump
installations. To turn on Emergency Heat press in the
Fan button. While holding the Fan button press
the Up button for 2 seconds. The Cool setpoint display
will read ‘EH’.
During Emergency Heat the thermostat will turn
on the fan and the 2nd stage of heat, when there is a
demand for heat, locking out the 1st stage compressor.
Exiting Emergency Heat is the same as entering. During
Emergency Heat only OFF and HEAT are available.
Press for
Emergency Heat
Fan
EH
HEAT
72
72
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