Replacing The Membrane - ProMinent Makro/ 5 Operating Instructions Manual

Repairs
12.1

Replacing the membrane

38
WARNING!
Risk of injury from the fan impeller
The fan impeller beneath motor's fan cowling can
cause severe injuries while it is turning.
– The pump must only be connected to the mains
voltage with the fan cowling closed.
CAUTION!
Warning of feed chemical spraying around
Feed chemical can spray out of the hydraulic compo‐
nents if they are manipulated or opened due to pres‐
sure in the liquid end and adjacent parts of the system.
– Disconnect the pump from the mains power supply
and ensure that it cannot be switched on again by
unauthorised persons.
– Depressurise the system before commencing any
work on hydraulic parts.
WARNING!
Observe the safety notes at the beginning of the
chapter.
1. Flush the suction line, discharge lines and liquid end (activate
flushing equipment or immerse suction lance in a suitable
medium and pump for a while (consider the effect of the
medium on your system first!)) or proceed, as described
below.
2. Set the stroke length to 0 % stroke with the pump running.
3. Switch off the pump.
4. Secure the pump to prevent it being switched back on.
5. If the liquid end has not been flushed according to the above
processes, then protect yourself against the feed chemical -
protective clothing, safety glasses, ... .
After dismantling immediately place parts that have been
wetting with the medium in a trough with a suitable medium
for flushing, in dangerous media were used flush and rinse
thoroughly.
6. Unscrew the hydraulic connectors on the discharge and suc‐
tion side.