15
7.1.3 Checking and cleaning the shredder
device (DRS)
Disassemble the shredder device and suction cover
and clean and perform an inspection. Next, install the
shredder device according to:
1 Position the impeller with the cutter head on the
pump shaft.
2 Secure the impeller.
3 Turn back the adjusting screws of the suction
cover up to the flange to ensure they no longer
protrude.
4 Install the suction cover in the pump housing.
5 Press the suction cover until the flange is on the
impeller everywhere.
6 Tighten the adjusting screws until the impeller is
just turning freely (gap = 0.3mm +/- 0.1mm).
7 Tighten the fastening bolts tightly.
ATTENTION
Again check whether the impeller can
turn freely.
7.2 Taking out of operation for a
long interval
Turn the impeller every three months. This will
prevent seals from sticking.
Protect the pump against freezing if there is a risk of
frost. Proceed as follows:
1. Close all globe valves.
2. Remove the pump from the drain.
3. Make sure the pump is cleaned correctly by
spraying with a powerful water jet.
4. Store the pump in a dry and frost-proof location.
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