5
ENGLISH
If there is a blockage in the pump, the overload protection may
be triggered. After rectifying the fault the "reset" button on the
motor protection plug must be pressed to switch the pump on
again. Pumps which are operated with a separate level control
have the overload protection in the level control.
Rotational direction
The rotational direction must be checked before installation! If
the rotational 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 direc-
tion is wrong, 2 phases of the supply cable must be swapped
over.
CAUTION!
The start-up jolt can be very forceful.
INSTALLATION
The pump must be installed as shown in the examples. For in-
stallations 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.
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 and OFF
switching heights of pumps without built-in level control are
variable by the use of a separate level control.
Permanent venting of the ring housing 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 collect-
ing chamber 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.
NOTICE!
NOTICE!
If the pump is malfunctioning, part of the contents of
the oil reservoir could escape into the pumping medium.
Dimensions of sump
Single installation with pump base: 40 x 50 cm
Single installation with guide rail system: 40 x 70 cm
Duplex installation: 70 x 70 cm
Example of installationwith guide rail system for pumping sta-
tions at a permanent location.
Installation:
Fix the coupling base firmly to the floor of the col
-
lection 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.
Example of installation with pump base
NOTICE!
NOTICE!
The floats of the level control and alarm system are
installed so that they are freely movable but not under the in-
let. 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 vertically
and with a foot strainer. In the case of pumps without a stand-
ard 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 en-
sure 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 reason, 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 deposits
to a large extent if you carry out a small modification. This re
-
duces the performance of the pump only insignificantly.
