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8024252/AE00/V1-0/2020-07| SICK
O P E R A T I N G I N S T R U C T I O N S | ZIRKOR200 Ex-D
Subject to change without notice
MAINTENANCE
8
8.6.6
Replacing the filter head
Fig. 36: Replacing the filter
▸
Loosen the locking screws on V-shield (1) and pull the V-shield off the protective tube.
▸
Loosen the 6 screws of filter flange (2) and remove the filter with filter flange and seal
from protective tube (3).
▸
Fit the new filter with filter flange and gasket, aligning the V-shade towards the flue gas
flow.
WARNING: Danger of explosion through breaching the flameproof enclosure
A hexagon socket screw damaged through incomplete loosening when changing the
filter or a loose hexagon socket screw can damage the flameproof enclosure by damag-
ing the flameproof joint and thus lead to an explosion.
▸
Loosen and tighten the hexagon socket screw completely.
▸
Replace damaged hexagon socket screws.
WARNING: Danger of burns on hot components which are in the process gas
The temperature of the probe filter head and all parts in the process gas is 150 °C to
800 °C (302 °F to 1472 °F) during operation. Directly touching the parts for
disassembly or maintenance causes serious burns!
▸
Use heat protection gloves when removing the probe.
▸
Switch the electronics supply voltage off before removing the probe.
▸
Place the probe in a safe, protected area after removal and wait until the probe
temperature has cooled down to the ambient temperature.
Note:
Probes in the Ex-D protection tube contain a filter made of sintered metal, which is
welded to the filter flange.