TB7100A1000 MULTIPRO™ MULTISPEED AND MULTIPURPOSE THERMOSTAT
63-2675—03 10

Wire Indoor Sensor

CAUTION
Electrical Interference (Noise) Hazard.
Can cause erratic system operation.
Keep wiring at least one foot away from large inductive
loads such as motors, line starters, lighting ballasts and
large power distribution panels.
1. Check Installer Setup Number (ISU) 340 to ensure it is
set to the desired value. (See Table 6.)
2. Wire sensor to S1 and S2 thermostat terminals.
3. Push excess wire back into the hole. Plug the hole using
nonhardening caulk, putty or insulation to prevent drafts
from affecting performance.
4. Remove sensor cover.
5. Mount sensor to the wall or junction box using the
screws and anchors provided.
6. Level the sensor for appearance only. Device functions
correctly even when not level.
7. Install sensor cover.

Sensor Wiring for Temperature Averaging

Fig. 25. Wiring four TR21 (20K ohm) Sensors.
Fig. 26. Wiring two TR21-A (10K ohm) Sensors to provide a
temperature averaging network.
Fig. 27. Wiring two TR21 (20K ohm) Sensors and one
TR21-A (10K ohm) sensor to provide a temperature
averaging network
Fig. 28. Wiring four C7189U (10K ohm) Sensors to provide
a temperature averaging network.
SET CALENDAR AND TIME
This thermostat is designed to, under normal use,
automatically keep current time and day in memory for up to
ten years once the calendar is set. There are two ways to set
the calendar for this thermostat:

Setting Calendar Once Functioning

See steps 1 through 4, in the Advanced Settings section, to set
year, month and day.

Setting Calendar When First Powered

When first powered, the thermostat proceeds through a
sequence of screens to set the calendar.
— When first powered, the thermostat proceeds through a
sequence of screens to set the calendar. See Fig. 29.
M27481
S1 S2
T T
SUBBASE
TR21
T T
TR21
T T
TR21
T T
TR21
M27482
S1 S2
SUBBASE
TR21-A
T4 T3
TR21-A
T4 T3
1
11
THE TR21-A IS A 10K OHM SENSOR.
M27483
T4 T3
TR21-A
1
1
THE TR21-A IS A 10K OHM SENSOR.
S1 S2
TT
SUBBASE
TR21
TT
TR21
M27432
WIRES MUST HAVE A CABLE SEPARATE
FROM THE THERMOSTAT CABLE.
1
1 C7189 C7189
C7189 C7189
SUBBASE
S1 S2