TB8220 COMMERCIAL VISIONPRO™ PROGRAMMABLE THERMOSTAT
63-2625—3
10
1.
Wire C7089U Outdoor Sensor to S1and S2 terminals on
the thermostat. If leadwire provided is not long enough
(60 in.), run a cable to a hole at C7089U location.
a. Using color-coded, 18-gauge thermostat wire is
recommended. For example of general wiring of
C7089U, see Fig. 26.
2.
Mount C7089U in its mounting clip.
3.
Plug wiring hole using nonhardening caulk or putty.
Fig. 26. Wire C7089U Outdoor Sensor to the thermostat.
Locate and Mount T7770A or C7189U Remote
Indoor Temperature Sensor (Optional)
Locate and mount the sensor in the same fashion as the
thermostat. See the Select Thermostat Location section.
Consider the following as well:
1.
Be sure wire distance between sensor and thermostat is
less than 200 feet.
2.
Mark the area on the wall selected for mounting the
sensor or junction box.
3.
Sensor wire must be separate from the thermostat cable.
4.
Run wire cable to a hole at the selected wall location.
5.
Pull approximately three inches of wire through the
opening.
NOTE: Color-coded, 18-gauge wire is recommended.
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. 27. Wiring four T7770A1006 (20K ohm) Sensors.
Fig. 28. Wiring two T7770A3002 (10K ohm) Sensors to
provide a temperature averaging network.
1
2
2
1
USE APPROPRIATE MOUNTING MEANS FOR THE
TYPE OF STRUCTURE.
PLUG WIRING HOLE WITH NON-HARDENING CAULK
OR PUTTY.
C7089
WIRING HOLE
THROUGH
STRUCTURE
M19970A
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.
