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8. System start-up process
General:
For regular maintenance and service works, it should be noted that the membrane station can be pulled
out of the tank even, when full with water.
The electric pump cables should be measured to ensure that the entire membrane station can be
extracted without first having to disconnect the wiring from the controller. The blower and clear water
hose should be installed with quick detachable connections, so that simple removal of the membrane
station is possible. This facilitates easy maintenance and service works.
Leak tightness test:
Attention:
The water tightness of all screw fixings is particularly important so that none of the contaminated
water contaminates the clear water. Furthermore, any wastewater which accidently enters through
poorly tightened screw fittings is sent to the membranes hollow fibres which may cause clogging of
the fibres. Therefore, a water tightness test must be performed before the start-up process.
Suggestion: Before connecting the blower hose to the aeration pipe, it should be connected to the ¾"
connection on top of the back flushing tank in order to pressurize the membrane station with pressure
(0.2bar). (The required adapter (3/4" IG x Ø25 sleeve) is included in scope of delivery.)
Then the blower is started in test mode. The membrane station is then immersed in tank water up to
the mid line of the back flushing tank. If no bubbles can be seen in the water then all screw
connections are water tight and the assembly can be finally installed.
! Note: run the test for 5 minutes!
Blower and clear water connection
The ready to install membrane station is set up in the tank.
Blower and membrane station are connected to each other via a
flexible hose (Ø26mm internal).
(Note: The central connection is simply left open when using the
system without aeration.)
The clear water hose is connected to the back flushing tank and
then led to the clear water tank.
(Respect decline from clear water tank down to the tank with the
membrane station to be able to fill in cleaning liquid for chemical
cleaning later.
Fig.: Blower hose connection
