10 Operation
10.3 During operation
ATTENTION
Leak in the pressure gauge through permanently opened pressure gauge shut-off valve.
► Close the pressure gauge shut-off valve immediately after completing reading.
1.
Open the pressure gauge shut-off valve.
2.
Read the operating pressure and close the pressure gauge shut-off valve.
10.3.2
Activating the reversing valve
Personnel qualification:
o
Trained personnel
1
Fig. 10: Reversing valve lever
Fig. 11: Positions of the reversing valvel
Notice
The reversing valve can be operated during operation.
1.
Turn the lever
1
to the left.
ð
The left-hand strainer and the left-hand pump are connected with the pipe system.
2.
Turn the lever
1
to the right.
ð
The right-hand strainer and the right-hand pump are connected with the pipe system.
3.
Turn the lever
1
into the middle position.
ð
Both strainers and both pumps are connected with the pipe system.
Notice
The reversing valve seals mechanically and therefore has a low amount of leakage.
10.3.3
Adjusting the overflow valve
Personnel qualification:
o
Fitter
Aids:
o
Hexagon key
Notice
The opening pressure of the overflow valve is set to 110% of the differential pressure in the factory.
1
2
Fig. 12: Adjusting the overflow valve
1
Screw plug
2
Adjusting screw
Operating instructions
OID 06en-GB Edition 2019-11
23
