Inspection
The operator and his agents must inspect the backwater closure monthly.
The following work steps must thereby be taken:
Repeatedly close and open the emergency closure with the manual lock to achieve free movement.
The emergency closure must be open after the inspection is completed!
Note:
Maintenance
A qualified technician must maintain the backwater closure semi-annually.
No backwater may be present at the time of maintenance work.
Note:
Inspection and maintenance
4.
6.
3.
5.
1
5
4
2
3
The following work steps must be taken:
see checklist page 7
• removal the cover screw connection (1)
• remove cover (2) with seal and (or) manual
locking
• remove closure (3)
• removal dirt and accumulations
• cleaning of parts and test the seals
• assembling the parts
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