Pentair JUNG U3 K Instructions De Service page 12

ENGLISH
ELECTRICAL CONNECTION
Only qualified electricians may carry
out electrical works to the pump or
the controls.
Before carrying out any works: dis-
connect the pump and the controls
from the mains and take steps to en-
sure that no one else can reconnect them to
the power supply.
The relevant standards (such as EN stand-
ards), country-specific regulations (such as
VDE in Germany), and the regulations of the lo-
cal power supply companies must be observed.
ATTENTION! Never put the mains plug or a
free lead end in water! If water gets into the
plug, this can cause malfunctions and damage.
Observe the operating voltage (see the type
plate)!
The pump is provided with a winding ther-
mostat. In case of unacceptably high tem-
peratures it switches off the pump to protect
it against possible damage. Unacceptably high
temperatures may result e.g. from dry running
or mechanical or electrical overload.
The pump is switched on again auto-
matically after cooling down - risk of
injury! For this reason, always dis-
connect the device from the mains before rem-
edying the fault! In order to do this, unplug
from the mains supply or remove the pre-fuses
of the pump controls!
Alternating and three-phase current circuit
diagrams
12 12
Rotational direction
Applies only for three-phase pumps. The rota-
tional direction must be checked before instal-
lation! If the rotational direction is correct, the
start-up jolt should be counter-clockwise. If
the rotational direction is wrong, 2 phases of
the supply cable must be swapped over, be-
cause a wrong direction of rotation results in
an overload of the pump.
INSTALLATION
The pump must be installed as shown in the
examples. For installations in accordance with
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
rubber flap supplied (U3 and U5) is for mobile
operation only.
A correspondingly larger diameter pipe should
be used for longer pressure pipelines to avoid
pipe friction losses.
In contrast to pumps with built-in level control,
the ON an OFF switching heights of pumps
without built-in level control are variable by the
use of a separate level controller. Our ready to
connect level controls can be installed without
specific electrotechnical skills.
Permanent venting may be necessary if the
pump runs dry from time to time (pressure
outlet surfaced). This can occur for example
if the residual water in the collecting chamber
evaporates or if the pump runs in "snore" mode
during the test run.
To vent the pump housing the attached elbow
must be drilled at the marked location to pro-
vide a 6 mm drill-hole.
ATTENTION! If the pump is malfunctioning,
part of the contents of the oil reservoir could
escape into the pumping medium.
Dimensions of chamber
Single installation with pump base: 40 x 40 cm
Single installation with guide rail system:
40 x 50 cm and Duplex installation: 50 x 50 cm