Cleaning; Replace Pressure Compensation Element - Siemens Simatic CFU Commissioning Manual

Zone 2
Check that the cable inlets, the grounding terminal, the
pressure compensation element, and the seals of the en‐
closure are sealed and intact.
Check whether there is any water or dust inside the en‐
closure.
If there is, find out how it got there. Replace damaged
parts.
Check that the wiring is secure (connectors, cables).
11.3.3.4

Cleaning

Zone 2/22 hazardous area
Cleaning with SIMATIC CFU bundle with aluminum enclosure
● You may clean the enclosure only with a damp cloth, as electrostatic charging may occur
● Do not expose the enclosure to the direct jet of a pressure cleaner (a maximum direct jet
Note
Run a function check after cleaning the CFU.
11.3.3.5

Replace pressure compensation element

In principle, the pressure compensation element for the SIMATIC CFU PA bundle with
aluminum enclosure is maintenance-free.
The following figure shows the position of the pressure compensation element.
SIMATIC CFU
Commissioning Manual, 07/2018, A5E39252870-AC
11.3 Configuration with SIMATIC CFU PA bundle with aluminum enclosure
WARNING
when cleaning the enclosure using a dry cloth.
pressure of 3 bar is permissible).
Compact Field Unit in the enclosure for use in a hazardous area
Zone 22
Check that the cable inlets, the grounding terminal, and the seals
of the enclosure are sealed and intact.
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