Seite 77
15.1.2 Checking/replacing the mains
water filter
The mains water filter must be checked
monthly for contamination and replaced
when necessary. Colouring of the originally
white water filter indicates contamination. hin.
Contamination results in an increased resist-
ance to flow. This lowers the supply pressure
to the pump. An excessively low supply
pressure can lead to switch-off of the high-
pressure nozzle system (dry run protection).
Replacing the water filter:
»
Set the control switch on the control
cabinet of the high-pressure nozzle
system to „0“.
»
Close the supply water stopcock
upstream of the water filter.
»
Relieve the line pressure (press red
button on the water filter cover).
»
Open the filter housing by hand. The
thread may be damaged if pliers are
used.
»
Clean the filter housing.
»
Replace the filter cartridge (if neces-
sary).
»
Screw the filter housing into the seat
by hand
Do not pinch the sealing ring.
»
Open the supply water stopcock.
»
The unit is now ready for restart by
pushing the control switch to the „I“
position.
15.1.3 Flushing the mains water sys-
tem
»
Set the control switch on the control
cabinet of the high-pressure nozzle
system to „0“.
»
Close the fresh water water stop-
cock upstream of the water filter.
»
Remove the connector for the fresh
water supply to the pump group.
»
Open the fresh water stopcock and
flush the water line until the water
appears to be free of contamination.
»
Close the fresh water stopcock.
»
Reconnect the fresh water supply to
the pump group.
»
Open the fresh water stopcock.
»
The unit is now ready for restart by
pushing the control switch to the „I“
position.
4
3
2
1
(1) Venting button
(2) Filter cartridge (inboard)
(3) Filter housing
(4) Holding of filter housing
Please note