Lux Products SMART TEMP TX9100E - Manual (Page 23)

23
EMERGENCY HEAT (Heat Pump Configuration Only)
While in normal Heat mode with the rotary dial in the RUN
position, one single press of the COPY/EMER button will
activate Emergency Heat mode. A single press again will end
Emergency Heat mode, and return back to normal Heat
mode. While in Emergency Heat mode, the word “EMER”
will be shown in the temperature portion of the display
screen. If a power loss occurs while in Emergency Heat
mode, the thermostat will continue to remain in Emergency
Heat mode even after the power comes back on.
Emergency Heat mode will prevent the first stage of your
heat pump system from turning on, and use only the “W2”
second stage heat terminal (Auxiliary Heat) as the primary
heating source. It may become too cold in some climates
for a heat pump alone to provide adequate heating without a
secondary heating device. As every heat pump has different
operating characteristics, you should refer to your heat
pump manufacturer's recommendations for when to disable
the heat pump and run in Emergency Heat mode.
NOTE:
This special Emergency Heat mode of operation only exists if
your System Mode hardware option is set to the HP (Heat
Pump) setting.
DISPLAY BACKLIGHT
Any button press will illuminate the display screen for about
12 seconds, even if the Keypad Lock is activated. Any
button press, mode switch change, or dial change while the
backlight is already illuminated, will reset the initial 12
second timeout.