Maintenance and servicing
11
11.1 General safety information for service and maintenance
WARNING
Dangerous voltage at open device
Danger of electrocution
Danger of electrocution exists when the enclosure is opened or enclosure parts are removed.
• Before you open the enclosure or remove enclosure parts, deenergize the device and wait
another 10 minutes. Ensure that the device cannot be switched back on inadvertently.
• Observe the special precautionary measures if maintenance is required while the device is
live. Have the maintenance work carried out by certied personnel with special training for
live-line working.
• Open the enclosure only for installation or maintenance. Close the enclosure after
completing this work.
WARNING
Faulty adjustment and reassembly
Faulty mounting or calibration can lead to dangerous gas leaks. This can lead to intoxications
or burns as well as corrosion damage at the device.
• Only carry out adjustments using appropriate tools in order to avoid short-circuits on the
electronic PCBs.
WARNING
Danger of poisoning by escaping gas
The device is designed for operation with toxic, lightly corrosive gases. Therefore, dangerous
substances may exit from the gas lines when they are opened.
• Prevent gases from exiting prior to opening or removing the device, for example:
– Shut o the gas inlets and gas outlets.
– Disconnect the gas lines from the device.
Wall-mounted device
Operating Instructions, 07/2023, A5E31930403-AB 143
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