Pentair Jung Pumpen MultiCut 08/2 ME/1 Instructions De Service page 10

ENGLISH
Operation with frequency converter
Frequency converters may only be used
for controlling the frequency of special
models of three-phase pumps. Alter-
nating current pumps are unsuitable as
a rule.
ATTENTION! For physical reasons,
pumps may not be operated at a higher
frequency than that shown on the type
plate. If the frequency increases beyond
the value on the type plate, the power
input increases and the motor is then
overloaded.
For special models of three-phase
pumps that are designed for frequency
converter operation, the motor type
shown on the type plate is labelled with
an additional "K" (e.g. D90-2/75 CK).
These pumps also have a sticker on
the end of the cable that indicates their
suitability for use with a frequency con-
verter.
Explosion protected pumps
These motors are fitted with PTC ther-
mistors as winding protectors. Voltages
of more than 2.5 V may not be connected
to the winding protection terminals 40
and 41! For explosion protected pumps,
a type-tested tripping unit that complies
with the EC type-testing requirements
is also necessary.
Potential equalisation
To comply with EN 60079-14 and EN
1127-1, an additional equipotential
bonding must be installed for facilities
with protective earth conductors in TN/
TT networks in areas subject to explo-
sion hazards. In Germany, for example,
the design must be in accordance with
VDE 0100, Part 540 (Association of Ger-
man Electrical Engineers).
No additional potential equalisation
is required on site for JUNG PUMPEN
concrete or plastic chambers in explo-
sion zones 1 and 2 (statement made by
TÜV Nord (Technical Inspection Agency)
in March 2008).
Exception: if conductive parts, such as
cable protection sleeves made of cor-
rugated pipe or a pressure pipe made
of metal, are connected to the chamber
from the outside. In this case, an elec-
trically conductive connection must be
made between the conductive parts and
the housing of the pump(s). For corro-
sion protection reasons, the connection
should be made using stainless steel.
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Explosion protected pumps have a spe-
cial connection point at the cable entry
point.
Rotational direction
Not applicable for alternating current
pumps. The rotational direction must
be checked before installation! If the ro-
tational direction is correct, the start-up
jolt should be in the opposite direction
to the rotational direction arrow on the
motor housing. The wrong rotational
direction is also indicated if the pump
performs inadequately when installed,
or if loud noises can be heard during
operation. If the rotational direction
is wrong, 2 phases of the supply cable
must be swapped over.
The start-up jolt can be very
forceful.
INSTALLATION
The pump must be installed as shown
in the examples. For installations in
accordance with DIN EN 12056-2, the
pressure pipe must be laid in a loop
above the local back pressure level and
protected with a back pressure valve.
Dimensions of chamber
Single installation with pump base:
40 x 40 cm
Single installation with guide rail sys-
tem: 40 x 65 cm
Duplex installation: 85 x 65 cm
Example installation with guide rail
system for pumping stations at a per-
manent location.
Assembly: Fix the coupling base firmly
to the floor of the collection chamber
using plugs and then mount the guide
rails. Next, install the pressure pipe
including the necessary fittings, such
as the non-return valve and shut-off
valves.
Finally, fit the pump with the screwed-
on coupling catch on to the guide rails
and lower it into place using a chain
fixed to the shackle.
A fixing facility for lifting gear should be
provided above the chamber opening at
a sufficient height.
Example of installation with pump
base or retrofitting or mobile operation.
Assembly: The submersible pump is fit-
ted with a 90° connection and then low-
ered into the chamber or collecting pit
using a chain. For short-term use, the
pump can also be put into operation us-
ing a suitable plug.
Level monitoring can be carried out
using various systems. Their specific
characteristics and requirements can
be found in the relevant operating man-
uals.
In accordance with the explo-
sion protection laws and regu-
lations, JUNG
should never be allowed to run dry or to
operate in "snore" mode.
The pump must switch off when the wa-
ter level sinks to the upper edge of the
pump housing (x in the illustration), at
the very latest. This shut-down must be
implemented via a separate switching
circuit. Dry running for servicing or in-
spection purposes may only take place
outside the potentially explosive area.
A correspondingly larger diameter pipe
should be used for longer pressure
pipelines to avoid pipe friction losses.
Rising pressure pipes must be protect-
ed from frost! A chamber cover must be
selected that is suitable for the intended
use and has the required load-bearing
capacity.
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 en-
sure that for every pumping operation
the hose is completely empty before the
Ex-pumps