Oase BioMaster 250 Notice D'emploi page 19

Cleaning/replacing the impeller unit
Prerequisite: The unit head is removed
(→ Dismantling the unit head
How to proceed:
U
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,
replace.
4. Fit the impeller unit, place 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 filter foams of the pre-
filter have been cleaned.
Prerequisite: The pre-filter has been removed.
(→ Removing the pre-filter P.8)
How to proceed:
V
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.
)
P.8
- EN -
19