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