About Advanced Features & Operation
Page 12
MEMORY BACKUP - In the event of a power loss, the
thermostat will retain the stored program settings without
external power or batteries.
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
Up button. You must be in HEAT mode to activate
emergency heat.
During Emergency Heat the thermostat will not attempt
to energize the 1st stage compressor. When there is a
heat demand, the thermostat engages the 2nd stage of
heat along with the fan.
Exiting Emergency Heat is the same as entering. During
Emergency Heat only OFF and HEAT are available.
the
Press for
Emergency Heat
FAN
12:00
73
72
Am
:
HEAT
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
