4 MAINTENANCE AND REPAIR
4-26
Therma-Flow
®
PLUS
IOM 09900002
Revision C 08/15/21
© 2021, Encon Safety Products, Inc.
Figure 4-16. Enclosure Heater Contactor
To replace the enclosure heater contactor:
1. Switch off the main electrical power supply to Therma-Flow
®
Plus.
2. Open the junction box located inside the enclosure.
3. Make note of the wire connections and disconnect the wires.
4. Remove the defective contactor and install the new contactor in reverse
order of removal.
5. Switch on the electrical power supply to Therma-Flow
®
Plus.
6. Test the contactor by checking if the heater starts and shuts off when the
temperature goes below and above the thermostat setting 80°F (26.7°C).
Apply ice to the thermostat to simulate cold air temperature (see Figure 4-15).
