Methanator Maintenance Considerations - Siemens Maxum II Service Manual

Flame Ionization Detector
4.7 Methanator
4.7.5

Methanator Maintenance Considerations

Purged Methanator
The methanator should be inspected regularly to ensure there is no physical damage affecting
the integrity of the protective cover and to verify that the protective cover is fastened securely
in place. The conduit pipe should be attached snugly in accordance with local safety practices.
Seals for pipe and cover should fit securely to prevent excessive escape of purge air from
around the device.
All gas connections must be made through the tubing that is supplied from the factory and is
part of the methanator assembly. This tubing should never be cut or shortened. If there is any
physical damage, remove power from the device and replace it.
Risk of ignition and explosion
The purged/pressurized methanator must not be operated without purge/pressurization
unless it has been verified that the area is free of explosive gases and vapors. This includes
opening the door to the EC for routine maintenance.
If the purge air supply of the Maxum II is interrupted during operation, it is imperative that the
analyzer be powered down. Once powered down, the electronics-cabinet door must be kept
closed for at least 30 minutes. A 30-minute delay is necessary to give the methanator time
to cool down sufficiently. If the door to the electronics cabinet is opened prematurely,
explosive gas or vapor can ignite by entering the electronics cabinet and then entering the
methanator through the conduit tube.
Failure to follow proper safety procedures may result in equipment damage, severe injury, or
death.
Explosion Proof Methanator
The methanator should be inspected regularly to ensure there is no physical damage to the
enclosure and to verify the screw-on cap is fully tightened. Secure the setscrew sufficiently to
require a tool to open the device.
The conduit pipe screws into a seal at the methanator housing. Up to that point, it is part of
the purged space of the EC. The pipe should be attached securely in accordance with local
safety practices. The seals for the pipe entry into the EC should fit securely to prevent excessive
escape of purge air.
Risk of ignition and explosion
The screw-on cap of the explosion proof/flameproof methanator must not be removed unless
it has been verified that the area is free of explosive gases and vapors or unless the
methanator has been given sufficient time to cool down (at least 30 minutes without power).
Failure to follow proper safety procedures may result in equipment damage, severe injury, or
death.
54
WARNING
WARNING
Maxum Edition II Detectors
Service Manual, May 2018, A5E42019847001