Pentair JUNG PUMPEN US EX Serie Instructions De Service page 10

ENGLISH
Example of installation with pump
base:
Installation: The submersible pump is
fitted with a 90° connection and then lo-
wered into the chamber or collecting pit
using a chain.
Level monitoring can be carried out
using various systems. Their specific
characteristics and requirements can
be found in the relevant operating ma-
nuals.
SERVICING
We recommend that you service the
equipment in accordance with EN
12056-4 and EN 60079-19.
To ensure continued reliability of ser-
vice, we recommend that you take out a
service contract.
Before carrying out any work:
disconnect the pump and the
control unit from the mains and
take action to ensure that no one else
can reconnect them to the power supply.
Check the rubber hose for me-
chanical or chemical damage.
Damaged or kinked hoses
must be replaced.
When using a chain to lift the
pump, please observe the rele-
vant national regulations re-
garding accident prevention. Lifting
gear must be checked regularly by an
expert in accordance with the legal re-
gulations.
Oil check
The oil reservoir is sealed on the out-
side with a brass screw. In order to
check the mechanical seal, the oil, in-
cluding any residue, must be drained
10
from the oil reservoir and collected 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-Ex" seal leak control device
in place of the brass screw on the oil
reservoir.
Changing the oil
To ensure operational reliability, 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 corre-
spondingly shorter intervals.
Use HLP hydraulic mineral oil, viscosity
class 22 to 46, e.g. Nuto from ESSO or
DTE 22, DTE 24, or DTE 25 from Mobil,
to replace the oil in the oil reservoir.
The filling quantity of oil required is 390
cm³.
ATTENTION! The oil reservoir must only
be filled with the specified quantity of
oil. Overfilling will result in the pump
being rendered inoperable.
Cleaning
To clean the impeller in the event of
an obstacle or blockage, the hexagon
socket screws on the underside of the
pump must be removed, any base feet
fitted must be taken off and the cover
must be lifted off the pump housing.
The impeller can then be removed.
Worn impellers can have sharp
edges.
Tightening torque M for A2 screw ma-
A
terials for M 6 is M = 8 Nm
A
Quick tips for remedying
faults
Pump does not work
∙ Check mains current (do not use a
pin gauge)
∙ Fuse faulty = may be too weak (please
refer to the section entitled Electrical
connection)
∙ Mains supply cable damaged = repair
to be carried out by manufacturer
only
Pump runs but does not pump
∙ Empty the pressure pipe or hose to
allow the non-return valve to open
and the air to escape from the pump
housing.
Impeller jammed
∙ Solids and fibrous matter have be-
come lodged in the pump housing =
clean
Decreased pumping performance
∙ Pump housing obstructed = clean
∙ Impeller worn = replace
∙ Wrong direction of rotation for a
three-phase current = ask a qualified
electrician to change 2 phases of the
supply line