TB8220U COMMERCIAL VISIONPRO™ PROGRAMMABLE THERMOSTAT
7
62-3070—07
Sensor Wiring for Temperature Averaging
Fig. 18. Wiring four TR21 (20K ohm) Sensors.
Fig. 19. Wiring two TR21-A (10K ohm) Sensors to
provide a temperature averaging network.
Fig. 20. Wiring two TR21 (20K ohm) Sensors and one
TR21-A (10K ohm) sensor to provide a temperature
averaging network
Fig. 21. Wiring four C7189U (10K ohm) Sensors to
provide a temperature averaging network.
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
1
1
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
T
T
SUBBASE
TR21
T
T
TR21
M22935
WIRES MUST HAVE A CABLE SEPARATE FROM
THE THERMOSTAT CABLE.
1
1
C7189
C7189
C7189
C7189
Y2
S2
W2
S1
