NOTE: The T8132C Thermostat does not have a setting for
steam/gravity air. Cycles would not be long enough for
accurate temperature control.
IMPORTANT: When using a high efficiency furnace such
as a 90% or greater Average Fuel Utilization Effi-
ciency (AFUE) unit, adjust screw A out one turn and
screw B in.
Fig. 7—T8132C Thermostat back.
IMPORTANT: Batteries must be installed for program-
ming and operation of the thermostat and heating/
Use two AA alkaline batteries; nonalkaline batteries do
not last as long. We recommend Energizer
Make sure the thermostat is set to OFF position.
Use a coin to remove battery door (see Fig. 8).
Install the fresh batteries as shown, making sure positive
and negative terminals are oriented correctly (see Fig. 9).
Replace battery door.
Fig. 8—Removing battery door.
As the batteries are running low, a bAt Lo indicator
flashes for one to two months before batteries run out
completely. Replace the batteries as soon as possible after
the indicator starts flashing. If the batteries are not replaced
while the bAt Lo indicator is flashing, the indicator eventu-
ally stops flashing. When the batteries are almost com-
FOR HIGH EFFICIENCY FURNACE (90%+ AFUE)
ADJUST: SCREW A–OUT ONE TURN
FUEL SWITCH – F POSITION
TABLE 2—BURNER ON-TIME ADJUSTMENTS.
If you want a longer on-time, readjust the screws as
follows (refer to the heating system table in Fig. 7):
If the burner on-time
screws A,B are adjusted
to match this system:
Warm air furnace
ADJUST SCREWS THROUGH HOLES
TO SELECT OPERATION DESIRED
Fig. 9—Installing position for batteries.
pletely dead, bAt Lo stays on without flashing to indicate
the thermostat and heating/cooling system have stopped
After the batteries are completely dead, the bAt Lo
indicator disappears, leaving a completely blank display.
Press down on left ends of batteries to remove. If the
new batteries are inserted within 20 to 30 seconds of
removing the old ones, the thermostat will not require
reprogramming. However, if the display is blank, the bat-
teries are dead or incorrectly installed and require repro-
gramming. See Owner's manual to reprogram.
IMPORTANT: Although the thermostat has a low battery
indicator, replace the batteries once a year to pre-
vent the thermostat and heating/cooling system from
shutting down due to lack of battery power.
MOUNTING THE THERMOSTAT
To mount the thermostat on the subbase, engage the tabs
at the top of the thermostat and mounting plate (see Fig. 10)
and then press the lower edge of the case to latch.
Then for longer burner
screws A,B to match this
Warm air furnace
Hot water boiler
INSTALL TWO AA ALKALINE
BATTERIES AS SHOWN