Ametek Combustion Analyzer WDG-VC OC1C

WARNING: Before working on the analyzer, read the entire procedure you will be performing to learn how to safely perform maintenance on and troubleshoot the WDG-V Analyzer

WARNING: Before performing any maintenance, service, or troubleshooting on the analyzer, review and follow all safety information

CAUTION: Preventing leaks in the sample system is critical to proper analyzer operation. Most leaks are preventable with regular cleaning and replacement of wetted parts

CAUTION: If you turn off the analyzer or the process is shut down, turn off the aspirator air to avoid plugging problems

CAUTION: When working on analyzer plumbing, always use a backup wrench to prevent damage to welds and distortion to analyzer plumbing

CAUTION: Never use pipe dope or any other contaminant that gives off a combustible vapor on any joints of the sample tubing. Combustible vapor in the sample tubing can lead to erroneous readings

The outside of the analyzer cover and all analyzer assembly components are hot during normal operation (up to 260 °C/500 °F inside the cover), even after a considerable period following shut-down. Allow analyzer components to cool for at least 90 minutes before working inside the analyzer. Use caution and wear appropriate gloves when handling components or when touching the analyzer cover

WARNING: Be extremely careful when performing maintenance on the analyzer while the process is running, especially if the process is under significant positive pressure. Removing any part of the analyzer plumbing can allow process gases and gases of high temperature to escape into the analyzer

Check calibration of the analyzer

Warning: Always turn off power before cleaning the enclosure

Choose the type of service done

CAUTION: Disconnect power from the analyzer and control unit and allow it to cool before replacing its parts

Analyzer power disconnected and cooled down?

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

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

NOTE: There is only one heater in the O, version. There are two heaters in the Combustibles/Methane version of the WDG-V

Remove the speed clip from the mounting tab. Use needle-nose pliers to remove the clip

Remove the box heater by sliding it out

Attach a new speed nut to the post

Reconnect the wires on the Sensor board

Sign off on the box heater replacement

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

Disconnect the Combustibles Detector wires from the terminal block labeled Cact and Cref

Select the type of Combustibles Detector

Loosen the two (2) 4.0 mm hex screws that hold the Combustibles Detector in place and remove the detector from its housing. Save the screws from the detector to use when installing the new Combustibles Detector

Always use a new o-ring when the Combustibles Detector has been removed

Install the new Combustibles Detector in place, aligning the two s (2) crews on the Heater Block. Be careful not to damage the detector element ends while inserting the assembly. Tighten screws until face is flush with the block and gasket is fully compressed

Reconnect the detector leads to the Sensor board

Sign off on the Combustibles Detector Replacement