Installation - Lightstat TG Series Installation And Operation Manual

Warning: Do not use this thermostat on circuits exceeding 30 volts AC.

Installation:

1. Check the equipment ratings on the system this thermostat will control, to make sure
the thermostat is appropriate for the application.
2. Check the system voltage and verify it is between 24 and 30 VAC.
3. Turn the sytem power OFF before you begin the installation procedure.
4. Note the color of the wires and the terminals they are connected to. Some thermostats
may have to be removed from the wall to determine wiring connections.
5. Remove the old thermostat from the wall, making sure the wires do not fall back into the
wall.
6. Make sure the thermostat switch is in the OFF position.
NOTE: TGHP thermostats may have power even while switch is in the OFF
position. (if the display can be read with the switch in the off position, the
thermostat has power)
7. Set DIP switches (see page 7).
8. Attach the wires as shown in the model specific wiring diagrams (see page 6).
9. Attach the thermostat to the wall using the hardware supplied. Note: The thermostat
does not have to be level in order to operate properly, but it should be level for good
appearance.
10. Turn the system power ON and the thermostat switch to the ON position as desired.
Note: Your Lightstat may come from the factory with fixed light sensitivity. This means that under normal lighting,
the thermostat will heat/cool your space to the comfort slide setting. Under low light conditions, the thermostat will
set the temperature back. A green setback light turns ON, indicating the thermostat is in the Setback mode.
Adjusting (optional) light sensor:
1. Open the thermostat cover and locate
the green setback light at the upper right
of the thermostat and the light sensor
below it.
2. Cover the light sensor with your
finger. The green setback light should
turn ON after 3 seconds, indicating the
thermostat is in Setback mode. Remove
your finger and the green light should
turn OFF indicating the thermostat is in
Day mode.
3. The Light Sensitivity knob located at
the lower right of the thermostat
controls the amount of light necessary
to keep the thermostat in the Day mode.
4. Turn the knob full clockwise (towards
bright) to put the thermostat in the
Setback mode. The green light should be on after 3 seconds.
5. Now slowly turn the knob counterclockwise (towards dim) until the green setback light
just goes out.
6. Close the thermostat cover. Cover the light sensor and verify the green light turns on.
Remove the covering over the sensor and verify the green setback light turns off. If it
does not turn off, slightly adjust the light sensitivity knob clockwise and re-verify
operation. Your thermostat is now adjusted to your current light level.
3