PN 9000-280-VE, Rev B
Replacing the Box Heater
Wiring of the box heaters depends on Line Voltage.
For 115 VAC units, the heaters should be wired in parallel.
For 230 VAC the heaters should be wired in series.
To replace the Box Heater (Figures 3-5.1, 3-5.2, and 3-5.3):
1. Open the analyzer and expose the analyzer components.
2. Close the isolation valves on the inlet and outlet of the process. Shutoff
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
6. Remove the box heater by sliding it out.
7. Replace the box heater.
AMETEK recommends that you coat the heater with “WATLUBE”
before installing.
8. Reinstall the snap rings.
9. Reconnect the wires on the
Sensor
board.
Figure 3-5.1.
Box Heater Snap Rings and
Heater locations.
3-16 | Thermox
®
WDG-V UOP ATEX-IECEx Analyzer
