About Advanced Features & Operation - Carrier NON-PROGRAMMABLE DIGITALTHERMOSTAT Owner's Manual

About Advanced Features & Operation
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.
2nd Stage
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
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'.
Press for
Emergency Heat
Fan
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.
Heating
2 degrees
1st Stage
turn on turn on
Dead Dead
Band Band
Heat Cool
Setpoint Setpoint
and Program On
72
Page 10
Cooling
2 degrees
1st Stage 2nd Stage
turn on turn on
operation.
EH
H
72
EAT