Comfort Stat CDT901 - Manual (Page 91)

CDT900 Series Touchscreen Programmable Thermostata
Special Heat Pump Operation
Heat Pump Indication (Requires
24 Vac Common Connection)
“E5” indication is located in the screen of the
thermostat. It is only visible when
lighted.When the L terminal is wired to an
equipment monitor,This is operational in the
Heat, Off, Cool or Auto positions. See Fig.
32.
Heat Pump Emergency Heat LCD
Indication(Requires 24 Vac
Common Connection)
The thermostat uses “E5” indicator that lights
when the thermostat is in the Emergency Heat
mode. The “E5” is located in the LCD screen
of the thermostat. It is visible only when on.
When the thermostat is in the Emer system
mode, the L terminal is continuously energized
and the “E5”is show.
Heat Pump Temperature Lockouts
Dual Fuel Heat Pump and Outdoor
Temperature Sensor
In this operation, there is no external fossil fuel
kit (dual fuel kit) installed; the thermostat control
this function.
90
AUTO
AM
SCHED
HOLD
CLOCK
SCREEN
MORE
SYSTEM
HEAT
FAN
Set To
MON