14 Maintenance
User qualification: Technical personnel and service - see
Ä ‘Qualification
of personnel’ on page 12
WARNING!
It is mandatory that you read the safety information and
specifications in the "Storage, Transport and Unpacking"
chapter prior to shipping the pump.
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 pressure
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.
Third-party spare parts for the pumps may result in prob‐
lems when pumping.
–
Only use original spare parts.
–
Use the correct spare parts kits - see order no. in
‘Service’ menu. If in doubt, refer to the ordering
information in the Appendix.
Interval Maintenance work Personnel
Quarterly*
n Check the pump hose for damage** - refer to "Repair".
n Clean running surface in dosing head and rotor rollers.
n Check that the hydraulic lines are fixed firmly to the liquid end.
n Check the leak-tightness of the entire liquid end.
n Remove the hose rupture sensor (option) and test with water.
n Check that the flow is correct: Press
[Priming]
to allow the pump to
prime briefly.
n Check that the electrical connectors are intact.
n Check the integrity of the housing.
Technical personnel
* Under normal loading (approx. 30% of continuous operation).
Under heavy-duty loading (e.g. continuous operation): Shorter intervals.
** With feed chemicals that put particular pressure on the pump hose, e.g.
those containing abrasive additives or oxidation agents, check the pump
hose more frequently.
Determining the service life of the pump hose
When starting to pump, regularly check the pump hose
for wear - do this several times a day if necessary. The
service life and thus the replacement interval for the
pump hose can be derived from the collected information
and experience.
The service life of the pump hose is between approx. 600 and 1200 oper‐
ating hours.
Expected service life of the pump hose
Maintenance
83
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