9
ENGLISH
The overload protection (only for D and
DS) must be set to the nominal current
of the pump (see type plate) + 10%. If
the motor protection plug or the level
control require to be opened in order to
reset or set the overload protection, this
must only be done by a qualified electri-
cian!
Disconnect the device or the
pump from the power supply
before opening!
If there is a blockage in the pump, the
overload protection may be triggered.
After rectifying the fault the "reset" but-
ton on the motor protection plug must
be pressed to switch the pump on again.
Pumps which are operated with a sepa-
rate level control have the overload pro-
tection in the level control.
Rotational direction
The rotational direction must be
checked before installation! If the rota-
tional 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 12056-4, the
pressure pipe must be laid in a loop
above the local backflow level and pro-
tected with a backflow prevention valve.
A correspondingly larger diameter pipe
should be used for longer pressure
pipelines to avoid pipe friction losses.
In contrast to pumps with built-in lev-
el control, the ON and OFF switching
heights of pumps without built-in level
control are variable by the use of a sep-
arate level control.
Permanent venting of the ring housing
may be necessary if the pump runs dry
from time to time (pressure outlet sur-
faced). This can occur for example if the
residual water in the collecting cham-
ber evaporates or if the pump runs in
“snore” mode during the test run.
To vent the pump housing on pumps US
151, US 251 and US 253 the pressure
pipe must be drilled above the pressure
outlet to provide a 6 mm drill-hole. On
all other pumps, the M8 hexagon socket
screw under the (brass) oil screw must
be removed.
Attention!
If the pump is malfunction-
ing, part of the contents of the oil res-
ervoir could escape into the pumping
medium.
Dimensions of sump
Single installation with pump base: 40
x 50 cm
Single installation with guide rail sys-
tem: 40 x 70 cm
Duplex installation: 70 x 70 cm
Example of installation
with guide rail
system for pumping stations at a per-
manent location.
Installation:
Fix the coupling base firm-
ly to the floor of the collection chamber
using wall plugs and then mount the
guide rail. 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 handle.
ON
OFF
ALARM
US 62, US 73
265
150
> 385
US 102, US 103 295
180
> 415
US 75
260
145
> 380
US 105
290
175
> 410
US 155
315
200
> 435
US 152 and 153 320
205
> 440
US 151 and 251 > 270 > 120 > 370
US 253
> 270 > 120 > 370
Example of installation
with pump base
Attention!
The floats of the level control
and alarm system are installed so that
they are freely movable but not under
the inlet. Please observe the minimum
distances. The controls must only be
installed in a dry and well ventilated
room!
Mobile operation
For safety reasons, mobile operation is
only allowed with a foot strainer. In the
case of pumps without a standard foot
strainer, a separate foot strainer must
be ordered and fitted under the pump in
place of the three base feet.
If a hose is used as a pressure line,
care must be taken to ensure that for
every pumping operation the hose is
completely empty before the pump is
submersed. Any residual liquid would
obstruct the ventilation of the pump
housing and therefore also hinder the
pumping operation. For the same rea-
son, the pump would not operate if
it was switched on before being sub-
mersed.
Flushing device
(not applicable for US 151 and US 251).
The pump can keep the intake section at
the bottom of the chamber clear of de-
posits to a large extent if you carry out
a small modification. This reduces the
performance of the pump only insignifi-
cantly.
This modifi-
cation is car-
ried out as
f o l l o w s :
Detach the
foot strainer
or the 3 base
feet and re-
move the cov-
er. Carefully
drill a hole
