7 | Installation and commissioning
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Fig.7.8: Undoing the cover
2.
Undo the cover (
GH
) by turning it in an anti-clockwise direction. Do not use any
tools (e.g. wrenches, water pump pliers etc.). Even if the housing shape appears
suitable for the use of these kind of tools, they could damage the fine thread or the
sealing face. Even small score marks in these gaps and sealing faces are enough
to mean that the explosion protection will no longer be guaranteed. In this case,
the housing parts must always be replaced.
Fig.7.9: Removing the cover
3.
Carefully remove the cover backwards in a straight line. The cover must only be
swivelled off the axis once the printed circuit boards are completely exposed (see
Fig.7.11).
Fig.7.10: Do not tilt the cover when removing
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