T8112D PROGRAMMABLE THERMOSTAT
68-0206 6
Fig. 10. Removing battery door.
M5781
Fig. 11. Installing batteries.

Mounting Thermostat

1. Engage the tabs at the top of the thermostat and
mounting plate. See Fig. 12.
2. Press the lower edge of the case to latch.
NOTE: To remove the thermostat from the wall, first pull out
the bottom of the thermostat and then remove the
top portion.
Fig. 12. Mounting thermostat on mounting plate.
INSTALL TWO AA ALKALINE
BATTERIES AS SHOWN
M5782
Auto On
Fan Cool Off Heat
System
FAN SWITCH SYSTEM
SWITCH
TU
AM
LEAVE
M5780
B.
PRESS LOWER EDGE
OF CASE TO LATCH.
A.
ENGAGE TABS AT TOP OF
THERMOSTAT AND MOUNTING PLATE.
TU
AM
LEAVE
PROGRAMMING THE THERMOSTAT

Set the Current Time/Day

To set the time:

1. Press and release the Clock/Day key once.
2. Press the Time keys ▲ or ▼ until the current time
displays.

To set the day:

1. Press and release the Clock/Day key again.
2. Press the Time keys ▲ or ▼ until the current day
displays.
3. Press the Run Program key.

Heating Program

To set the system switch to HEAT:

1. Press and release the Schedule key once. WAKE,
Mon-Fri , and SET appear on the display.
2. Press the Time keys ▲ or ▼ to program WAKE time,
and Temp keys ▲ or ▼ to program WAKE temperature
for Mon-Fri.
3. Repeat this sequence for LEAVE, RETURN, and
SLEEP.
4. Press the Schedule key until SAT, SUN, WAKE and
SET appear on the display.
5. Press the Time keys ▲ or ▼ to program WAKE time,
and Temp ▲ or ▼ to program WAKE temperature for
Sat-Sun.
6. Repeat this sequence for SLEEP.

Cooling Program

1. Set the system switch to COOL and follow the same
procedure as for the Heating Program.
2. After programming, adjust the fan and system switches
as desired.
3. Press and release the Run Program key to start the
program.

A Quick Guide for Operating or Making

Changes

NOTE: The system switch must be set to Heat or Cool to
perform the following.

To temporarily change the temperature for the

current period only:

1. Press the Temp keys ▲ or ▼.
— The temporary indicator shows on the display and
cancels itself at the next scheduled change.
2. To cancel sooner, press the Run Program key.

To hold a temperature indefinitely:

1. Press the Hold Temp key.
2. Press the Temp keys ▲ or ▼.
3. To cancel, press the Run Program key.