Pentair JUNG PUMPEN US EX Serie Instructions De Service page 9

must be eliminated before switching on
again.
Potential equalisation
To comply with EN 60079-14 and EN
1127-1, an additional potential equa-
lisation must be installed for facilities
with protective earth conductors in TN/
TT networks in areas subject to explosi-
on hazards. Explosion-protected pumps
have a connection facility for this at
the cable entry point. In Germany, for
example, the design must be in ac-
cordance with VDE 0100, Part 540 (from
the Association of German Electrical
Engineers).
According to a statement made by the
German inspection authority TÜV Nord
in March 2008, it is not necessary to
provide any additional potential equa-
lisation on site for Jung Pumpen con-
crete and plastic pump chambers in Ex
zones 1 or 2.
Exception: If conductive parts such as
a corrugated tube cable protection or a
metal pressure pipe lead to the pump
chamber connection from outside. In
these cases, an electrically conducti-
ve connection must be made with the
housing of the pump(s). For reasons
of corrosion protection, stainless steel
should be used for this connection.
Rotational direction
Applies only for three-phase pumps.
The rotational direction must be che-
cked before installation! If the rotati-
onal 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.
Coil thermostats
ATTENTION! In addition to the overload
trip and/or the motor protection switch,
the thermostats incorporated in the
motor windings must 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.
The thermostats are to be connected in
such a way that the motor is switched
off via the control circuit when the res-
ponse 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 94/9/EC, 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. Alterna-
ting 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 frequen-
cy 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 motors are fitted with PTC ther-
mistors as winding protectors. Voltages
> 2.5 volt must not be applied to termi-
nals 40 and 41 of the winding protec-
tors! For explosion protected pumps, a
type-tested tripping unit that complies
with the EC type-testing requirements
is also necessary.
INSTALLATION
The pump must be installed as shown
in the examples. For installations in
accordance with DIN EN 12056-4, the
pressure pipe must be laid in a loop
above the local backflow level and pro-
tected with a backflow prevention valve.
The minimum flow rate of 0.7 m/s in the
piping must be adhered to.
ENGLISH
In accordance with the explosi-
on protection laws and regula-
tions, these pumps should ne-
ver be allowed to run dry or to operate in
"snore" mode. The pump must switch
off when the water level sinks to the up-
per edge of the pump housing, at the
very latest (see drawings). This shut-
down must be implemented via a sepa-
rate switching circuit. Dry running for
servicing or inspection 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.
The pump housing can be permanently
vented if necessary by drilling a 6 mm
hole in the pressure pipe above the
pressure outlet.
ATTENTION! If the pump is faulty, part
of the contents of the oil reservoir could
escape into the pumped media.
Dimensions of chamber
Single unit with pump base: 40 x 40 cm
Single unit with guide rail: 40 x 60 cm
Duplex unit: 60 x 60 cm
Example of installation with guide rail
Installation: Fix the coupling base firm-
ly to the floor of the collection chamber
using wall 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 onto the guide rail
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.
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