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Utility Box Mounting of Sensor 669529001
1. Feed the cable from the utility box.
2. Strip 1/4–inch of insulation from the end of the wires.
3. Connect stripped, labeled wires to matching terminals on
the temperature sensor base. See Figure 2.
4. Tighten screws on terminal connections. Gently tug wire
to check for secure connections. Confirm that each wire
is connected to the proper terminal.
5. Neatly store excess wire back inside the utility box.
6. Mount the sensor base to the utility box using two 6-32 ×
5/8–inch flat head sheet metal screws
provided with the sensor.
7. Replace cover on wall temperature sensor by attaching
the catches at the top of the cover to the top tabs on the
sensor base. Secure the cover to the base by tightening
the two allen wrench set-screws on the bottom of the
sensor cover. Do not overtighten.
Wiring
Temperature Sensors 669529101 &
669529201
Note: All sensors have black (common), white (thermistor),
and red (LED) wires. With the tenant override and/or
set point adjustment option, a green wire is provided.
The optional thermometer does not affect wiring.
Figure 1: Temperature Sensor Wiring to MicroTech III Unit
Controller
Page 4 of 6 / IM 955-3
Temperature
Sensor Terminals
MicroTech III Unit Con-
troller TB1 Terminals
Temperature Sensor 669529001
Figure 2: Temperature Sensor Wiring to MicroTech III Unit
Controller
Temperature
Sensor Terminals
Testing
Temperature Sensors 669529101 &
669529201
Cool Test
1. Slide Mode switch to Cool mode.
2. Adjust set temperature so it is 5 degrees below room
temperature.
3. Air conditioning should come on within five (5) minutes.
Status indicator may come on.
4. Adjust the set temperature 2 degrees above the room
temperature and the A/C should turn off. There may be a
fan delay on your system.
Heat Test
1. Slide Mode switch to Heat mode.
2. Adjust the set temperature so it is 5 degrees above the
room temperature.
3. Heat should come on within five (5) minutes. Status
indicator may come on.
4. Adjust the set temperature so it is 2 degrees below the
room temperature and the heat should turn off. There
may be a fan delay on your system.
Fan Test
1. Set room temperature so that unit is no longer heating or
cooling the space. Wait for unit to cycle off.
2. Slide Fan switch to On position.
3. Indoor fan turns on.
4. Slide Fan switch to Auto position.
5. Indoor fan turns off.
MicroTech III Unit Con-
troller TB1 Terminals
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