Installation - Jung Pumpen MULTICUT Serie Originalbetriebsanleitung

The pump must be protected via an
overload trip. Setting for direct on-line
start = nominal current, and for star-
delta start = nominal current x 0.58.
If the protective device has been trig-
gered, the cause of the malfunction
must be eliminated before switching on
again.
Coil thermostats
ATTENTION! In addition to the overload
trip or protective switch of the motor,
the thermostats integrated in the motor
winding must also be connected. The
thermostats are suitable for 250 V / 1.2
A (cos phi = 0.6) and are labelled 30 and
32 for connection purposes.
For this reason, after the protective
device has been triggered, the mains
cable must be unplugged before rem-
edying the cause of the failure, as oth-
erwise the pump will be automatically
switched on again.
Thermostat connection without ex-
plosion protection
The thermostats are to be connected in
such a way that the motor is switched
off via the control circuit when the re-
sponse temperature is reached. The
motor is switched on again automati-
cally after the winding has cooled down.
Thermostat connection with explo-
sion protection
The thermostats are to be connected in
such a way that the motor is switched
off via the control circuit when the re-
sponse temperature is reached. It must
not be possible for the motor to switch
on again automatically after the winding
has cooled down.
After an automatic cut-out via
the temperature limiters, the
cause of the malfunction must
first be eliminated. Only then may the
motor be switched on again manually.
The restart interlock must be "non-
resetting on power failure", i.e. the lock
must be in place to prevent restarting
even after a power cut (in Europe: Di-
rective 2014/34/EU, Appendix II 1.5, EN
60079-17 Table1, B10).
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.
These special motors are fitted with
PTC thermistors as winding protec-
tors. Voltages of more than 2.5 V may
not be connected to the winding protec-
tion terminals 40 and 41! For explosion
protected pumps, a type-tested tripping
unit that complies with the EU type-
testing requirements is also necessary.
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.
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-
ENGLISH
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.
Explosion protected pumps have a spe-
cial connection point at the cable entry
point.

INSTALLATION

The pump must be installed as shown
in the examples. For installations in ac-
cordance with EN 12056-4, the pressure
pipe must be laid in a loop above the lo-
cal back pressure level and protected
with a back pressure valve.
Example installation with guide rail
system
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.
Level monitoring can be carried out
using various systems. Their specific
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