User Guide
thermostat's set temperature knob is in the OFF
position (which will break both L1 and L2 poles).
The thermostat uses two snap-action switchs to
control heating output. Heating should cease when
the room is warmer than its set temperature, and
be on when cooler than its set temperature. At its
minimum dial position (labeled OFF), both L1 and
L2 poles should remain open at any temperature.
For further assistance:
Contact your HVAC service company or our
Technical Assistance Line if not resolved.
Wiring Information and Troubleshooting
This page provides general guidance for your LUX Line-Voltage mechanical thermostat.
For more detailed information please refer to the instructions that came with your
thermostat.
Please make specific note regarding LOW VOLTAGE and LINE VOLTAGE directions. Do
not install LINE VOLTAGE wires to a LOW VOLTAGE control.
Do NOT wire by color of the wire, wire by the LETTER designation to which the wire was
attached on the previous control.
If there were no letter designations on your old thermostat, contact our Technical
Assistance Department for assistance.
Model
LV2 / LV21
Problem
Resolution
120 VAC or 240 VAC connected
to previous control
DO NOT ATTACH LINE VOLTAGE WIRES TO A
LOW VOLTAGE THERMOSTAT.
Although its installation is relatively simple, this
thermostat is designed to switch hazardous
voltage. If you are unsure of any aspect of this
products application or installation consult with our
technical assistance personnel, or other qualified
service personnel for assistance.
Carefully follow the included wiring instructions for
the LUX line voltage heating thermostat.
Advanced Troubleshooting
NOTE: Only the L1-IN/OUT pole is broken during
normal temperature control. The L2-IN/OUT pole
is a pass-through and is always live unless the
thermostat's set temperature knob is in the OFF
position (which will break both L1 and L2 poles).
No heat when expected
Verify that your thermostat's electrical connections
are clean and tight.
If your house wiring at the thermostat location has
aluminum wiring, the included wire nuts cannot be