Pentair JUNG PUMPEN MULTISTREAM 150/4 C3 Instructions De Service page 11

garding accident prevention. Lifting
gear must be checked regularly by an
expert in accordance with the legal reg-
ulations.
Motors in the Ex-range con-
form to the "flameproof enclo-
sures" ignition protection cat-
egory. 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 "OEL". In
order to check the mechanical seal,
the oil, including any residue, must be
drained from the oil reservoir and col-
lected in a clean measuring container.
∙ If the oil is contaminated with water
(milky), an oil change must be car-
ried out. Check again after a further
300 operating 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 con-
trol 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 cor-
respondingly shorter intervals.
Use HLP hydraulic mineral oil, viscosity
class 22 to 46, e.g. Mobil DTE 22, DTE
24, DTE 25, to replace the oil in the oil
reservoir.
The quantity of oil required is 7000 cm³.
ATTENTION! The oil reservoir may only
be filled with the specified quantity of
oil. Overfilling will result in the pump
being rendered inoperable.
Cleaning
To clean the impeller and the spiral
housing, simply remove the 4 hexago-
nal screws and lift the motor unit off the
spiral housing
Worn impellers can have sharp
edges.
ATTENTION! If the wrong screws are
unscrewed, the oil will run out of the oil
reservoir.
Tightening torque M for A2 screw ma-
A
terials
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
for M 16 M = 160 Nm
A
for M 24 M = 350 Nm
A
Checking the pump unit
The housing screws for the pump, and
the connecting and fixing 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
between the impeller face and the wear
plate must be checked for wear by an
expert and replaced if necessary. Nomi-
nal dimension: 0.5 - 0.8 mm.
Adjust the impeller gap
1. Block the impeller.
2. Loosen both the central impeller
screw and the three setscrews.
3. Loosen the impeller by knocking it
gently with a hammer.
4. Tighten the impeller screw until it is
"hand tight".
5. Adjust the impeller gap by pulling
the impeller down to the nominal
dimension 0.5 - 0.8 mm.
ENGLISH
6. Block the impeller again and tighten
the impeller screw to 350 Nm.
7. Check the gap adjustment. Then
tighten the three setscrews to a
tightening torque of 5 Nm.
The maximum adjustment possible is 3
mm
Replace the wear plate
1. Loosen the four cylinder head
screws on the wear plate on the
lower pump case.
2. Take out the old wear plate with the
seal.
3. Clean the wear plate seat and insert
the new wear plate with a new seal.
4. Tighten the four cylinder head
screws again.
5. After this, readjust the impeller gap
again.
Replacing the impeller
Worn impellers can have sharp
edges.
1. Remove the 8 hexagonal screws
and lift the motor unit off the spiral
housing.
2. Block the impeller.
3. Loosen the central impeller screw
located in the impeller hub.
4. Loosen the impeller by knocking it
gently with a hammer and then slide
it off the shaft with the compression
piece.
5. Clean all the parts of the impeller
mounting.
6. Unscrew the three setscrews from
the compression piece.
7. Grease the shaft cover on the inside.
ATTENTION! Do not use grease con-
taining graphite, (e.g. "Molykote").
8. Slide the compression piece into the
impeller and assemble all parts of
the impeller mounting.
9. Slide the new impeller over the pre-
assembled impeller mounting onto
the shaft and tighten the impeller
screw until it is "hand tight".
10. Mount the motor unit on the ring
housing; the cable entry point is op-
posite the discharge branch.
11. Set the gap dimension to 0.5 - 0.8
mm and then tighten the impeller
screw to 350 Nm.
12. Finally, screw the three setscrews
tight to 5 Nm.
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