Maintenance - M&C EC Series Instruction Manual

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Maintenance

Qualified personnel
The operator must ensure that all work on the ECM-EX2 is carried out only by authorized and qualified personnel.
Observe the plant- and process-specific regulations and the regulations which are applicable to Ex zones.
Any work must only be carried out after the EX-free measurement has been completed. Immediately after finishing
the work, all safety and protective devices must be reattached or put into operation and tested.
Before starting any maintenance work, make sure that any work done on the device is in compliance with all
relevant regulations and standards.
Warning
Warning
Warning
The intervals between servicing are dependent on the process and system conditions in your facility. The facility
QA/QC plan should address the frequency for maintenance and should be updated based on your operations.
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The work described in this chapter can be carried out by qualified personnel. The
following knowledge is at least required for the work:
•
Instructed person in EX-protection
•
Trained person in the electrotechnical field
•
Detailed knowledge of the manual and the applicable safety regulations
Disconnect power supply before opening the device for access.
Make sure that all external power supplies are disconnected.
This also applies to any external alarm or control circuits which may be
connected.
Only carry out any work at the gas cooler, when the process and the
environment is declared as an explosion-free zone. A zone is declared as
explosion-free zone, if it is free of explosive atmosphere.
Only carry out any work at the temperature controller, when the process and
the environment is declared as an explosion-free zone. A zone is declared as
explosion-free zone, if it is free of explosive atmosphere.
Inhalation hazard possible, if using toxic or asphyxiant gases!
Purge cooler with inert gas or air before opening! If the cooler is used for toxic
gas or asphyxiant (oxygen-displacing) gas, it needs to be purged with inert gas
or air before opening. Follow closely all relevant occupational safety
regulations during operation.
Connect the cooler to earth (electrical bonding terminal). The bleeder resistor
needs to have an overall value of < 10
ECM-EX2 | 1.03.01
Ω.
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