12 Servicing
12.5 Cleaning the strainer
WARNING
Risk of injury through emitted pumped liquid.
Pumped liquids can be hot, poisonous, combustible and caustic.
► Wear personal protective clothing during all the work. Ensure face protection.
► Collect any discharging pumped liquid safely and dispose of it in an environmentally compatible
manner in accordance with the applicable local regulations.
► If work on the blocked part of the pump station takes longer, monitor the filling level of the strainer
housing and catch the leakage.
WARNING
Risk of injury through emitted pumped liquid when working on the pump station without previ-
ous pressure relief.
► Open the screw plug of the vent hole by a max. of 2 rotations in order to reduce the internal pres-
sure in the housing.
6
7
8
9
5
4
3
1
2
Fig. 25: Cleaning the strainer
1.
Switch over the lever of the reversing valve
8
in order to shut off the respective side
2.
Open the screw plug of the vent hole
6
by a max. of 2 rotations in order to reduce the internal
pressure in the housing.
3.
Open the cap nuts
2
and remove the strainer cover
1
.
4.
Remove the conical spring
3
and the strainer insert
4
from the strainer chamber.
5.
Clean the strainer insert, for example by washing it in a solvent.
6.
Reinsert the strainer insert and conical spring.
7.
Place the strainer cover on the stud screws
5
, tighten the cap nuts
2
.
8.
Retighten the screw plug of the vent hole
6
.
9.
Bring the level of the reversing valve
8
to the desired position.
42
OID 02en-GB Edition 2019-11
Operating instructions
