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6.1 General information
Commissioning
The commissioning process must be carried out by a quali-
fied person. The availability of this person is the responsibili-
ty of the direct supplier of the wastewater lifting system. A test
run with water lasting at least two switching cycles is requi-
red for the commissioning process. During the test run, steps
should be taken to prevent the system running dry. The fol-
lowing need to be tested before, during and after the test run:
a) the electrical cut-out of the wastewater lifting system ac-
cording to the IEC regulations and local regulations;
b) the rotational direction of the motor;
c) the valves (activation, open position, tightness);
d) the switching and setting of the switching levels in the
sump, if not already set by the manufacturer;
e) tightness of the system, fittings and lines;
f) testing of the operating voltage and frequency;
g) function test of the backflow preventers;
h) alarm relay;
i) attachment of the pressure line;
j) motor circuit breaker; tested by temporarily unscrewing two
cut-outs (two-phase run);
k) oil level (if there is an oil chamber);
l) control lamps and counters;
m) function test of the manual pump if one has been instal-
led.
The commissioning process must be documented in writing
during which important data, such as e.g. the setting of the
motor circuit breaker and the data of the operating hour coun-
ter, are recorded. The commissioning process may only be
carried out by qualified persons. The standard DIN 1986, Part
3 must be observed when commissioning lifting systems.
Caution
Before starting the commissioning process, the intake lines
and the pump need to be cleared of solids such as metal,
sand etc.
Before starting the commissioning process, the pump must
be filled with the pumped liquid up to the level of the ven-
ting borehole in the pump casing.
The pump may not suction in any air!
After the whole system and all the extra parts, pipes and el-
ectrical connections have been installed completely and
correctly, the system can be started. All fitted gate valves
must be open.
Before commissioning please ensure that the rated voltage
and current type stipulated for the system correspond to the
rated voltage and current type on site.
Before starting the commissioning process, check the in-
stallation/cables again carefully. Is the protective earth ef-
fective? Have the relevant standards / guidelines been ob-
served, in particular with regard to the explosive area? Do
not start the system if there is any visible damage to the
motor, the switchgear or the cables.
Please always observe the safety instructions in Chapter 1
6. Commissioning
of these instructions.
IMPORTANT
Check all screw connections are tight.
6.2 Pressure discharge pipes
DAs standard, the pressure discharge pipes of the lifting sy-
stem are equipped with a check valve and backflow pre-
venter for each pipe. The backflow preventer must always
be operational (see Fig. 1).
The flap (dotted line) is only opened by the flow of the pump.
Abb. 1
6.3 Description of the function
The system is operational when the POWER-LED shines
and if no malfunction (ALARM-LED) are displayed. As the
level of (dirty) water in the tank rises, the float recognises the
ON level and the pump is switched on. When the pump ope-
rates, the level of water in the tank drops so that the OFF
level is undercut again. After the end of the after-running pe-
riod, the pump is switched off. The float symbols in the dis-
play show when the respective levels have been reached.
If the current running time of the pump exceeds the confi-
gured value of the maximum limit running time, the pump is
switched off. At the same time a malfunction is indicated by
the orange LED and the relay output "Malfunction". The
malfunction (LED and relay) remains saved until the "Alarm"
key is pressed.
The pump(s) can be switched on by pressing the test key
twice.
15
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