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3.4 Vertical level switch
For pumps with vertical level switch, the difference in
level between start and stop is not adjustable. The
start/stop levels are shown in fig. 10.
Fig. 10
* For KP 350 the distance between the bottom of the
suction strainer and the lowest level of the level
switch is 110 mm.
4. Operation and maintenance
Under normal operating conditions, the pump is
maintenance-free.
If the pump has been used for liquids other than
clean water, it should be flushed through with clean
water immediately after use.
As a precaution, the suction strainer must
always be fitted to the pump during opera-
tion.
Never dismantle the pump unless the elec-
tricity supply has been switched off.
During dismantling, caution should be ex-
ercised as there will be access to sharp
edges, etc. which may cut.
4.1 Cleaning the pump
If the pump does not deliver a sufficient quantity of
water because of sediment, dismantle and clean the
pump.
The dismantling of the pump is carried out as fol-
lows:
1. Disconnect the electricity supply.
2. Allow the pump to drain.
3. Carefully loosen the suction strainer by inserting
a screwdriver in the recess between the outer
casing and the strainer and pressing it hard. Re-
peat the procedure until the strainer is free and
can be removed, see fig. 11.
Start
80 mm
Stop
(110 mm*)
100 mm
Fig. 11
4. Clean the suction strainer and refit it.
If the pump still does not deliver a sufficient quantity
of water, dismantle the pump as follows:
1. Disconnect the electricity supply.
2. Turn the pump housing 90° counter-clockwise us-
ing a screwdriver, see the arrow on the pump
housing. Pull off the housing, see fig. 12.
Fig. 12
Pump housing
3. Clean and flush the pump with water to remove
possible impurities between the motor and the
outer casing. Clean the impeller, see fig. 13.
7
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