Lux Products P621Uc Thermostat User Manual


 
INSTALL BATTERIES INTO THERMOSTAT: Install two brand new Energizer
®
or
DURACELL
®
“AA” size alkaline (only) batteries, into the thermostat’s battery
compartment. Ensure the batteries are installed in the proper direction.
GAS / ELEC CIRCUIT BOARD OPTION (“G” TERMINAL FAN OPERATION): This
setting is a plastic shorting cap called a jumper. This jumper must remain
installed, and set to either GAS or ELECTRIC for your system to work properly.
This setting changes how your system’s blower fan (if applicable) is controlled
while the thermostat is in HEAT or EMERG HEAT mode, when the Fan switch in
the AUTO position. This setting does not affect the fan operation while in COOL
mode.
When set to “GAS”, the blower fan is controlled solely by the heating system
itself. Systems that would typically use the “GAS” setting would be: natural gas,
propane, or oil furnaces, and boilers.
NOTE: If your blower fan does not operate
properly after installation, move the Gas /
Electric option to the “Electric” setting.
When set to “ELEC”, the blower fan is
controlled directly by the thermostat. This
setting is required for heating systems
that do not control their own fan, such as
HEAT PUMPS, and units that only have an
electric-resistive heating element as the
heat source.
These items below are all located behind the door on the front of the thermostat.
To open the door, pull outwards using the small indentation in the center of the
top edge of the thermostat housing.
HEAT / OFF / COOL, SYSTEM MODE SWITCH: Set this switch to HEAT to control
your heating system, and COOL to control your cooling system. The OFF position
will disable both the heating and cooling units.
AUTO / ON, FAN MODE SWITCH: When this switch is in AUTO, the blower fan (if
present in your system) will automatically cycle on and off by itself while heating
or cooling is running. When in the ON position, the blower fan will run constantly
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COMPLETE THE INSTALL:
GAS
ELEC
BATTERY
FRONT PANEL ITEMS: