Lux Products P621Uc Thermostat User Manual


 
SET DAY AND TIME: Place the Set Slide Switch into the DAY/TIME position. With
the day flashing, press UP or DOWN to set the day of the week. Press NEXT and
the clock time will start flashing. Use UP or DOWN to set the time, making sure
the AM/PM indication is correct. Holding the UP or DOWN buttons will make the
clock digits scroll rapidly. Return the Set Slide switch to the RUN position when
finished.
HEATING AND COOLING: Basic operation of your heating or cooling system can
be obtained with the Set Slide Switch in the RUN position and choosing either
HEAT or COOL on the System Mode switch. The temperature can be adjusted
using the UP and DOWN buttons. When the thermostat is first powered up, it will
follow a default temperature routine that is preset from the factory (shown
below).
EMERGENCY HEAT: (Heat Pump Configuration Only). While in normal Heat mode
with the Set Slide switch in the RUN position, one single press of the 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 also be shown in the middle 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” heat terminal (Auxiliary Heat) as the primary
heating source. This will not only prevent the heat pump from wasting energy if
outdoor temperatures are too low to support efficient operation, but it could also
prevent damage to the heat pump if outside temperatures are below the
manufacturer’s recommendations. As every heat pump has different operating
23
PERIOD
MORN
DAY
EVE
NITE
HEAT MODE
6:00 AM 70
°F (21 °C)
8:00 AM 62
°F (17 °C)
6:00 PM 70
°F (21 °C)
10:00 PM 62
°F (17 °C)
COOL MODE
6:00 AM 78
°F (26 °C)
8:00 AM 82
°F (28 °C)
6:00 PM 78
°F (26 °C)
10:00 PM 75
°F (24 °C)
OPERATING INSTRUCTIONS: