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Maintenance work:
Interval
Maintenance work
Quarterly*
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After approx. 5,000
Change hydraulic oil - refer to "Changing hydraulic oil" in this
operating hours
chapter.
Check whether the seals of the overpressure signalling system are
OK and in case of doubt, replace.
Check the effectiveness of the protective temperature limiter for the
heating cartridge.
Arrange for immediate rectification of any outwardly apparent
damage or corrosion on parts of the housing and on connecting
parts of the heating cartridge or protective temperature limiter by the
manufacturer using original spare parts.
After approx. 10,000
Diaphragm change - refer to "Diaphragm change" in the chapter
operating hours **
"Repair".
ATEX pump only: Special maintenance work - refer to the safety
information for ATEX pumps.
ATEX pump only: Check the seals of the EDS 4448 pressure
switch at regular intervals (depending on the climatic conditions
and the feed chemical) in respect of their serviceability and
replace if necessary.
Check that the metering lines are fixed firmly to the liquid end.
Check that the suction valve and discharge valve are fitted
tightly.
Check whether the diaphragm rupture sensor stops the pump or
generates an alarm after it is triggered, see the chapter
"Repairs".
Check for firm seating of the diaphragm rupture sensor.
Check whether the overpressure signalling triggers when an
overpressure exists.
Check the secure seating of the overpressure signaller.
Check the secure seating of the pressure limitation valve (50
Nm).
With the pump running, check whether bubbles rise in the
window of the bleed valve.
Check that the flow is correct: Allow the pump to prime briefly.
Check the tightness of the entire liquid end - particularly around
the leakage hole!
Check that the electrical connections are intact.
Check that the dosing head screws are tight.
Check the firm, clean electrical connection of the earthing wires.
Check the oil level.
* Under normal loading (approx. 30 % of continuous operation)
Under heavy loading (e.g. continuous operation): Shorter intervals.
** under normal loading. With very unfavourable metering parameters:
Shorter intervals.
WARNING!
In the area at risk from explosion: stop the pump immediately
and rectify these peculiarities.
Maintenance
Personnel
Technical personnel
Instructed personnel
Technical personnel
Technical personnel
Customer Service
department
Technical personnel
41
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