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Filtral 3000: Opening the filter housing and cleaning the different filters (Fig. C, D)
Unscrew the stepped hose adapter (16) prior to removing the bend (12). Pull the clamps on both sides of the bottom
strainer casing (2) to the side and lift off the top strainer casing (1). Remove the foam filter (3) and the UVC clarifying
unit including pump (20), and the fine foam filters (22), bio surface elements (23) and the gravel bag (24).
Clean the bottom strainer casing (2) and the top strainer casing (1) with clear water using a brush. Wash out foam fil-
ters (3, 22), bio-surface elements (23) and the gravel bag (24) under running water. Do not use chemical cleaning
agents as they would kill the micro-organisms in the different filter media. At the beginning, this entails a reduced filter
capacity.
Filtral 6000/9000: Opening the filter housing and cleaning the different filters (Fig. C, D)
Unscrew the stepped hose adapter (16) prior to removing the bend (12). Pull the clamps on both sides of the bottom
strainer casing (2) to the side and lift off the top strainer casing (1). Remove the UVC clarifying unit including
pump (20), foam filters (3, 22), bio surface elements (23) and gravel bags (24). When the aeration stone (25) is con-
nected, put it to the side. Clean the bottom strainer casing (2) and the top strainer casing (1) with clear water using a
brush. Wash out foam filters (3, 22), bio-surface elements (23) and gravel bags (24) under running water. Do not use
chemical cleaning agents as they would kill the micro-organisms in the different filter media. At the beginning, this en-
tails a reduced filter capacity.
Unscrew pump (28) from the UVC water housing (26). Unscrew the pump lid (27) counter-clockwise (bayonet closure)
and remove rotor (29). Clean all components using clean water and a brush. After cleaning the pump, reassemble in
the reverse order.
Opening and cleaning the UVC water housing (Fig. G, H)
NOTE
For safety reasons, the UVC lamp can only be switched on when the unit head has been correctly fitted into the casing.
The UVC water housing (26) is fastened to the unit head (31) by means of a bayonet closure. Press on the engage-
ment lug (30) at the unit head (31), turn the UVC water housing (26) counter-clockwise and carefully pull it off the unit
head (31). Clean the UVC water housing (26) under running water. Check the quartz glass (33) for damage and clean
its outer face with a moist cloth.
Note:
For an optimum filter performance, we recommend to replace the UVC lamp after approx. 8000 operating hours.
Refer to 'Replace UVC lamp'.
Closing the UVC water housing (Fig. M-O):
Check the O ring (37) at the unit head (31) for damage. Place the O ring (37) on the recess at the unit head (31), then
carefully push the UVC water housing (26) on the unit head (31) by applying medium pressure. While doing so, slightly
turn the UVC water housing (26) to ensure that the tenons (39) and the grooves (40) of the bayonet closure intermesh.
Turn the UVC water housing (26) clockwise against the stop and allow to engage.
Filtral 3000: Assembly of the unit (Fig. P-R)
Bolt the pump (28) to the UVC water housing (26) using the union nut. Insert fine foam filter (22) in the bottom strainer
casing (2), place the bio surface elements (23) and the gravel bag (24) in the bottom strainer casing (2). Insert the UVC
clarifying unit including the pump (20). Insert the foam filter (3). Attach the top strainer casing (1) and press it onto the
bottom strainer casing (2) until the clamps engage in the bottom strainer casing.
Important:
Guide the connection ca-
ble (7) through the cable opening at the bottom strainer casing (2) and clip with the cable kink protection in the bottom
strainer casing (37).
Filtral 6000/9000: Assembly of the unit (Fig. P-R)
Bolt the pump (28) to the UVC water housing (26) using the union nut. Place the bio surface element (23) and gravel
bags (24) in the bottom strainer casing (2). Place the aeration stone (25) between the gravel bags (24). Ensure that the
hose is not kinked. Place the foam filters (3, 22) in the bottom strainer casing (2). Insert the UVC clarifying unit includ-
ing the pump (20). Attach the top strainer casing (1) and press it onto the bottom strainer casing (2) until the clamps
engage in the bottom strainer casing.
Important:
Lead the connection cable (7) through the cable opening in the bot-
tom strainer casing (2) and route the cable such that pinching is avoided.
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