Oase BioMaster 250, Operating Instructions Manual

Page: 26 / 204

- EN -
26 BioMaster 250/350/600, BioMaster Thermo 250/350/600/850
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. Turn the casing until the locking hooks are pushed
in, then pull off the casing.
2. Remove the pre-filter pipe and foam filters.
–
BioMaster 250: 4 foam filters.
–
BioMaster 350: 5 foam filters.
–
BioMaster 600: 6 foam filters
–
BioMaster 850: 7 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.
–
Ensure that the locking hooks lock in place in the
casing.
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. Use water to flush the filter media from the aquar-
ium.
–
If necessary, replace the filter media. Rinse the
new filter media thoroughly with warm tap water
prior to its first use.
4. Insert the parts in 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.
–
Ensure that the filter cover is positioned on the
foam filter in the top filter basket.
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. Pull off the venting element.
2. Turn the pump lid counter-clockwise (bayonet lock)
and remove.
3. Remove the impeller unit and clean. If necessary, re-
place.
4. Fit the impeller unit, replace the pump lid and lock
(turn clockwise).
–
Ensure that the two rubber bearings are correctly
seated.
5. 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.