Pentair Jung Pumpen Multistream Series Instruction Manual page 5

and has the required load-bearing capacity.
If necessary, the pump housing can be ventilated by unscrew-
ing the "Luft" sealing screw. A flushing pipe, available as an ac-
cessory, can be installed to minimise deposits and the forma-
tion of floating layers in the chamber.
If the pump is malfunctioning, part of the contents of the oil
reservoir could escape into the pumping medium.
Not Ex-pumps. If a hose is used as a pressure line, care must
be taken to ensure that for every pumping operation the hose
is completely empty before the pump is submersed. Any resid-
ual liquid would obstruct the ventilation of the pump housing
and therefore also hinder the pumping operation.
This situation can also occur if the pump runs dry, pumps down
to a lower lever than that shown in the installation drawing, or
runs in "snore" mode during the daily test run.
In these cases, the pump housing must be ventilated by un-
screwing the "Luft" sealing screw.
SERVICING
Maintenance and inspection of this product must be carried
out in accordance with EN 12056-4 and EN 60074-19.
To ensure continued reliability of service, we recommend that
you take out a service contract.
WARNING!
Before carrying out any works: disconnect the pump and the
controls from the mains and take steps to ensure that it cannot
be emergized again.
WARNING!
Check the mains cable for signs of mechanical and chemical
damage. Damaged or kinked cables must be replaced.
NOTICE! When using a chain to lift the pump, please observe
the relevant national regulations regarding accident preventi-
on. Lifting gear must be checked regularly by an expert in ac-
cordance with the legal regulations.
NOTICE! Motors in the Ex-range conform to the "flameproof
enclosures" ignition protection category. Maintenance works
that affect the explosion protection may only be carried out by
authorised specialists or by the manufacturer. When carrying
out repairs, all areas next to flameproof gaps must be checked
for damages and, if necessary, replaced by genuine parts.
Oil check
The drain plug is labelled "Öl". In order to check the mechanical
seal, the oil, including any residue, must be drained from the oil
reservoir and collected in a clean measuring container.
• If the oil is contaminated with water (milky), an oil change
must be carried out. Check again after a further 300 operat-
ing hours, but at the very latest after 6 months!
• However, if the oil is contaminated with both water and
pollutants, then not only the oil must be replaced, but the
mechanical seal as well.
For monitoring the oil reservoir, it is also possible to retrofit the
electrode of our "DKG" or "DKG-Ex" seal leak control device in
place of the "DKG" sealing screw.
Changing the oil
To ensure operational liability, the first oil change should be
carried out after 300 operating hours, with further oil changes
carried out after every 1000 operating hours.
If the number of operating hours is very low, an oil change
should still be carried out at least once a year.
If wastewater with strongly abrasive constituents is being
pumped, the oil changes should be carried out at correspond-
ingly shorter intervals.
Use HLP hydraulic mineral oil, viscosity class 22 to 46, e.g. Mo-
bil DTE 22, DTE 24, DTE 25, to replace the oil in the oil reservoir.
The quantity of oil required is 1000 cm³, except for A1 and B1
pumps, which must be filled with 800 cm³.
The oil reservoir may only be filled with the specified quantity
of oil. Overfilling will result in the pump being rendered inoper-
able.
Cleaning
To clean the impeller and the spiral housing, simply remove the
4 hexagonal screws and lift the motor unit off the spiral hous-
ing
CAUTION!
Worn impellers can have sharp edges.
NOTICE! If the wrong screws are unscrewed, the oil will run out
of the oil reservoir.
Tightening torque M for A2 screw materials
A
for M 6 M = 8 Nm
A
for M 8 M = 20 Nm
A
for M 10 M = 40 Nm
A
for M 12 M = 70 Nm
A
Checking the pump unit
The housing screws for the pump, and the connecting and fix-
ing screws of the installation must be checked to ensure they
are fixed securely. They should be tightened if necessary.
If the pump performance decreases, or if increasingly loud
noises can be heard during operation, the gap dimension be-
tween the impeller face and the wear plate must be checked
for wear by an expert and replaced if necessary. Nominal di-
mension: 0.5 - 0.8 mm.
ENGLISH
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