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Homeowner’s Guide
TB--NAC
TB--NHP
LEGACY LINE--RNC
NON--PROGRAMMABLE THERMOSTAT
A07110
Leg acy Line --- RNC Non --- Progr amma ble Ther mosta t
1. To Select the Mode:
Use the H/C button to move between the choices. OFF,
HEAT, COOL, or EMHT will appear on the display . EMHT
will only appear on heat pump models.
2. To Select the Fan Operation:
Use the FAN button to move between continuous fan
(indicated by the FAN ON icon) and auto fan operation.
3. To Read the Room Temperature:
The large display reads room temperature until a button is
pressed.
4. To Adjust the Setpoint:
In normal operation, the large display shows room
temperature. At the first press of the UP or DOWN button,
the large display shows the current setpoint and the SET
TEMP icon is turned on. Further presses of the UP or
DOWN button adjust the setpoint upward or downward.
Five seconds after the last button press, the display returns
to the room temperature and the SET TEMP icon turns off.
TROUBLESHOOTING
What if ther e is a green light on in the upper corner of
the display area?
This thermostat uses a green LED to indicate auxiliary heat and
emergency heat operation on the Heat Pump model. This green
light means one of two things.
1. Auxiliary Heat is on:
This light turns on automatically when the system
determines that it’s too cold outside for your heat pump to
heat the house without help. So, it’s getting help from the
electric heaters.
NOTE: This indicator does not reflect a problem with your
system.
2. Emergency Heat is on:
If the heat pump is not working properly, you can manually
select the emergency heat for extra he lp in heating. You’ll
know there’s a problem if the house can’t seem to get warm
when it’s cold outside.
You want to avoid using emergency heat, though, because
it’s the most expensive option. And, of course, if you
suspect a problem with your heat pump, call your heating
and cooling dealer immediately .