Combustibles Detector Replacement; Hot-Wire Combustibles Detector Replacement - Ametek Thermox Series 2000 WDG-IV User Manual

Combustibles Detector Replacement

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7-10 | Thermox Series 2000 WDG-IV / IVC / IVCM
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Always use a backup wrench when working on sensor plumbing.
NOTE

Hot-Wire Combustibles Detector Replacement

Use Figure 7-5:
WDG-IVC
Remove the detector leads from terminal strips E, F, H, and I on the
sensor board.
WDG-IVCM
Remove the detector leads from terminal strips W, X, Y, and Z.
Loosen the compression fitting nut that holds the combustible detector
in place and remove the detector from its housing. Save the nut from
the detector to use when installing the new combustibles detector.
It is very important to orient the new combustibles detector correctly
inside the combustibles detector block (sample flow path must contact
both detector leads at the same time).
Place a mark on the edge of the combustibles detector at the 12 o'clock
position after you have determined the correct orientation (Figure
7-5). Place detector elements in detector block vertically.
Install the new combustibles detector with nut and ferrules. Be ex-
tremely careful not to damage the detector elements when installing.
Ensure that the mark you made in Step 3 is in the 12 o'clock position
to ensure proper orientation of the combustibles detector in the com-
bustibles detector block.
Reconnect the detector leads to the sensor board.
The active element wires are labeled "A" and "AC".
WDG-IVC connect to terminals E and F on the sensor board.
Polarity not required.
WDG-IVCM Connect to terminals W and X.
The reference element wires are labeled "R" and "RC"
WDG-IVC Connect to terminals H and I on the sensor board.
Polarity not required.
WDG-IVCM Connect to Y and Z