Installation
Wiring a T55 space temperature sensor
Part #33ZCT55SPT
This wall-mounted sensor monitors space temperature and can be used instead of an SPT sensor.
Wiring specifications
Cable from sensor to controller:
If <100 ft (30.5 meters) 22 AWG, unshielded
If >100 ft (30.5 meters) 22 AWG, shielded
Maximum length:
500 feet (152 meters)
To wire the T55 sensor to the controller
1
Strip the outer jacket from the cable for at least 3 inches (7.62 cm). Strip .25 inch (.6 cm) of insulation from
each wire. Cut the shield and drain wire from the cable.
2
Wire the sensor to the controller, attaching the red wire to the
T55 (Opt)
terminal and the black wire to the
Gnd
terminal. See diagram below.
3
Verify that the
T55 (Opt)
jumper is in the
Thermistor
position.
Wiring a Supply Air Temperature sensor
Part #33ZCSENSAT
Each VAV Zone Controller requires that a temperature sensor be installed in the supply air stream. Mount the SAT
sensor at least 2 feet downstream from a hot water or steam coil, or at least 4 feet downstream from an electric
heating coil.
18
VAV Zone Controllers
