Ametek Thermox WDG-V UOP, User Manual

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6-10 | Thermox WDG-V UOP IECEx/ATEX
Box Heater Replacement
Use Figures 6-6a, 6-6b, and 6-6c:
Wiring of the box heaters depends on Line Voltage. For 115VAC units,
the heaters should be wired in parallel. For 230VAC the heaters should
be wired in Series.
1. Open the sensor and expose the sensor components.
2. Close the isolation valves on the inlet and outlet of the process. Shut-
off levers should be in the vertical position.
3. Disconnect heater wires.
4. Remove the Heater block from the Aspirator block.
5. Remove the snap rings. Use needle-nose pliers or snap ring tool to
remove the clip.
Snap Rings
Heater
Figure 6-6a. Box Heater Snap Rings and Heater locations.
6. Remove the box heater by sliding it out.
7. Replace the box heater.
It is recommended to coat the heater with “WATLUBE” before install-
ing.
8. Reinstall the snap rings.
9. Reconnect the wires on the sensor board.