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Cleaning/replacing the foam filter of the pre-filter
Prerequisite
• The pre-filter has been removed. (→ Removing the
pre-filter)
How to proceed:
T
1. Press in the engagement hooks on the pre-filter and
pull off the housing.
2. Remove the pre-filter pipe and foam filters.
– BioMaster 250: 4 foam filters.
– BioMaster 350: 5 foam filters.
– BioMaster 600: 6 foam filters.
3. Rinse the foam filters in warm water. If necessary,
replace the foam filters.
4. Assemble the pre-filter in the reverse order.
Cleaning/replacing the filter media
U
Filter media on delivery:
a
Foam filter 30 ppi
b
Foam filter 20 ppi
c
Hel-X bio-elements, always place them contained
in the bag into the strainer casing
Prerequisite
• The unit head is removed. (→ Dismantling the unit
head)
How to proceed:
U
1. Remove all filter baskets.
2. Clean the filter baskets and container.
3. Rinse the filter media in warm water. If necessary,
replace the filter media.
4. Place the parts into the container in the reverse or-
der.
– Carefully fit the filter baskets in the bottom re-
cess in the container. Correctly position the pre-
filter.
5. Reassemble the unit in the reverse order.
Cleaning/replacing the impeller unit
Prerequisite
• The unit head is removed. (→ Dismantling the unit
head)
How to proceed:
V
1. Turn the pump lid counter-clockwise (bayonet lock)
and remove.
2. Remove the impeller unit and clean. If necessary, re-
place.
3. Fit the impeller unit, replace the pump lid and lock
(turn clockwise).
– Ensure that the two rubber bearings are correctly
seated.
4. Reassemble the unit in the reverse order.
Cleaning the valve box of the pre-filter
The valve box only has to be cleaned if venting does
not function even though the foam filters of the pre-
filter have been cleaned.
Prerequisite
• The pre-filter has been removed. (→ Removing the
pre-filter)
How to proceed:
W
1. Undo the fasteners and pull off the valve box.
– If necessary, carefully lift the fasteners using a
screwdriver.
2. Remove the valve seal and both valve flaps. Clean
all parts.
3. Assemble the valve box in the reverse order.
– Ensure that the fitted valve flaps can be easily
moved.
– Note: Ensure that the opening in the valve seal is
precisely aligned to the opening in the suction
chamber.
Cleaning the suction chamber of the pre-filter
The suction chamber only has to be cleaned if venting
does not function even though the foam filters and
valve box of the pre-filter have been cleaned.
Prerequisite
• The pre-filter has been removed. (→ Removing the
pre-filter)
C A U T I O N
There is a strong spring in the suction chamber that
can act like a projectile.
Risk of injury due to parts flying around
• When opening the suction button, do not point it at
persons.
• Firmly hold the suction button.
How to proceed:
X
1. Press in the engagement hooks, hold and turn the
locking ring counter-clockwise (bayonet lock).
2. Carefully lift the suction button until the tension of
the spring is relieved.
3. Remove the suction button and spring.
4. Clean the suction chamber.
5. Assemble the suction chamber in the reverse order.
- EN -
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