FISCHER Mess- und Regeltechnik GmbH
Commissioning | 4
BA_EN_DA03_GKT_HLP_ATEX
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4 Commissioning
4.1 General
All electrical supply, operating and measuring lines, and the pressure connec-
tions must have been correctly installed before commissioning. All supply lines
are arranged so that there are no mechanical forces acting on the device.
Check that all pressure connections are free of leaks before commissioning.
In models filled with fluid, the venting valve on the upper side of the bayonet
casing must be opened before commissioning! To do this, turn the venting
screw anticlockwise as far as it will go.
Venting screw
Closing screw
0.8 x 4
Fig. 15:
Venting valve
4.2 Venting of the pressure lines
WARNING
Risk connected to pressure
Never remove the venting screw if the unit is still pressurised! Close the shut-off
valves of the flanged fittings or depressurize the system.
The pressure lines need to be vented for before commissioning on devices that
work with fluid media. Proceed as follows:
• Remove the venting screws of the two pressure chambers.
• Carefully increase the system pressure until the fluid level is 5 mm below
the sealing surface of the threaded borehole.
• Close the device with the venting screws
Venting screws
5
Seal (FKM)
Fig. 16:
Venting with fluid media
