Ametek Combustion Analyzer WDG-V OC8H

Analyzer opened and components exposed

Isolation valves on the inlet and outlet of the process closed

Cell furnace wires disconnected

Thermocouple assembly removed from the furnace

Swagelok nut at the bottom of the furnace loosened

Swagelok nut below the flow sensor loosened

NOTE: The Combustibles Detector will always face outward, and the Methane detector will always face inward from the factory.

Methane Detector (Blue and White) wires disconnected on the Sensor board

Two (2) 4.0 mm hex screws that hold the Methane Detector loosened and detector removed from its housing

New o-ring used when the Methane Detector has been removed

New Methane detector installed in place, screws aligned on the block, and detector element ends not damaged while inserting the assembly

Detector leads reconnected to the Sensor board

Sign off on the Methane Detector Replacement

Warning: The tip of the Thermocouple is positioned in the furnace so that it is near, but not touching, the Cell Housing or the furnace heater coil

Isolation valves on the inlet and the outlet of the process closed

Thermocouple wires disconnected from terminals +C- on the Sensor board

Two (2) speed clips removed from the Thermocouple mounting tabs

Thermocouple removed from the furnace

New Thermocouple inserted aligning the tab with the two posts on the bottom plate

CAUTION: Take care to avoid damaging the ceramic tip while inserting the assembly

One new speed nut attached to each post

Loosen the two Phillips screw located on the back of the electronics plate

Slide the board out until the pegs at the top line up with the holes in the Sensor board plate and drop it down

Sign off on the Sensor Board Replacement

Warning: Only perform this procedure on Combustibles/Methane Units

Remove the Combustibles Block Heater by sliding it out

Tighten the hex screw into place

Reconnect the wires on the Sensor board

Sign off on the block heater replacement