Honeywell TB7220 COMMERCIALPRO Product Data page 11

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 S1and 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
S1
T7770A
T T
T7770A
T T
Fig. 26. Wiring four T7770A1006 (20K ohm) Sensors.
SUBBASE
S1
T4 T3
1
T7770A3002
1 THE T7770A3002 IS A 10K OHM SENSOR.
Fig. 27. Wiring two T7770A3002 (10K ohm) Sensors to
provide a temperature averaging network.
SUBBASE
S2
T7770A
T T
T7770A
T T
M22831
S2
T4 T3
1
T7770A3002
M22933
TB7220 COMMERCIALPRO™ PROGRAMMABLE THERMOSTAT
T7770A1006
T7770A1006
1 THE T7770A3002 IS A 10K OHM SENSOR.
Fig. 28. Wiring two T7770A1006 (20K ohm) Sensors and
one T7770A3002 (10K ohm) sensor to provide a
temperature averaging network
1
C7189
C7189
1 WIRES MUST HAVE A CABLE SEPARATE FROM
THE THERMOSTAT CABLE.
Fig. 29. 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. 30.
11
SUBBASE
S1 S2
T4 T3
T T
1
T7770A3002
T T
M22934
W2
Y2
A
S1
C7189 S2
C7189
M13667
63-2635—03