Supervision
The fan must not be operated unattended as long as it conveys substances
whose reactions are unknown or if unexpected reactions are anticipated.
If supervision must be withdrawn for operational reasons, this must be reported to
the safety officer and the system must be secured in such a way that no
unauthorized intervention can be carried out. The safety officer must decide on
issues regarding supervision.
6.2 Putting out of operation
An internal process instruction must regulate the work to be carried out as well as the preparatory work for
putting back into operation (e.g. cleaning).
7 Maintenance, repair, cleaning
7.1 Preparation
The „safety position“ is defined as follows:
- The drive must be currentless and the main switch secured against switching on,
- The fan impeller can be manually rotated,
- Fan must be flushed with fresh air and be condensate-free,
- Fan must be at room temperature,
- Personal protective equipment must be available and it must be worn. (Use of protective gloves
because of sharp edges, ear protectors if necessary).
- A sign, e.g. „Under-repair“, must be attached to the system,
- The safety devices may be removed,
- The work to be carried out must not be done under time pressure,
- The general and specific regulations on accident prevention as well as the EKAS guidelines
(Switzerland) must be observed,
- The safety officer must be informed about the nature and course of the work,
If the intake and delivery ducts of the fan are dismounted for a longer period of time, the openings must be
closed off.
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