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screwed in against the stop. Note: Because of a built in safety switch, the lamp will only light up when the installation of
the UVC unit is completed.
Assemble the filter housing (A1)
Insert the water outlet (1 ¼") with the large seal into the hole from outside, push the second large seal on the water
outlet from inside, then screw fit the large bracket on the water outlet such that it points upward. Connect the small
sealing to the water inlet (¾") in the hole, then screw fit the small bracket to the water inlet from inside such that it
points downward. Place the coarse foam filter (blue) and the fine foam filter (grey) in the filter centre. Fill in the lava
rocks on the inlet side and the bio surface elements on the outlet side. Press the filter lid including the UVC unit onto
the filter housing.
Connect hoses (A3)
Use approx. 50 cm of the supplied hose to connect the UVC outlet to the filter water inlet. Connect the UVC inlet to the
filter pump outlet.
Installation (B)
Position the flow-through filter at a place which cannot be flooded and as horizontal as possible at least 2 m from the
pond edge on a firm and level ground above the pond water level. The outlet position must be a maximum of 1m above
the pond surface. Do not expose the unit to direct sun radiation. Ensure direct access to the lid to be able to carry out
work at the unit. Place the filter pump in the pond as horizontal as possible on a firm, sludge free ground so that it is
completely in the water, at a maximum depth of 2 m below the water level.
Attention! Never operate the unit without water flowing through!
Start-up (C)
Adhere to the safety information given above! Connect the filter pump power plug (C1) and wait until the flow-through
filter is filled with water. Connect the power plug of the UVC lamp (C2), the blue control lamp is lit. Note: After a new
installation, the unit only reaches its full biological cleaning effect after a few weeks. The full effect on bacteria is only
reached as from an operating temperature of + 10°C. Note: In the event of overheating, the installed temperature
monitor switches the UVC lamp off automatically, the lamp automatically switches on again once cooled down. Dis-
connect the power plug to switch the units off (C3, C4).
Maintenance and cleaning
Attention! Prior to starting maintenance work, always disconnect the power plugs of the UVC pre-clarifying
unit and of the filter pump (C3, C4)!
Adhere to the safety information given above! Check and clean the water outlet into the pond at regular intervals. We
recommend to clean the filters at regular intervals (e.g. every four weeks), however, at the lastest when cloudy or dirty
water from the water outlet returns to the garden pond. Never use chemical cleaning agents. Fit a dirt drain hose to the
filter outlet.
Cleaning the filters (D)
Remove all hoses, the filter lid including the UVC unit, as well as the foam filters and clean them under running water
by compressing them vigorously. Gently rinse the lava rocks and the bio surface elements with clean water (not under
running water). Completely empty the filter housing and clean under running water. Reassembly the filters in the
reverse order, start the filter pump first (C1), then connect the power plug of the UVC pre-clarifying unit (C2).
Clean the quartz tube of the UVC pre-clarifying unit (E)
Disconnect the power plug of the UVC pre-clarifying unit and of the filter pump (C3, C4) and protect from unintentional
switching on again. Turn head of the UVC unit counter-clockwise against the stop and gently pull off, turn off the
clamping screw of the UVC unit counter-clockwise, then pull the quartz glass including the O ring to the front with a
slight turning motion, remove the O ring from the quartz glass, clean and check the O ring for damage. Clean the
quartz glass outer face with a moist cloth and check for damage.
Replacing the UVC lamp (E3)
Change the UVC lamp after approx. 6,000 operating hours. Pull out and replace the UVC lamp.
Important! Only use lamps the designation and rating of which match the information on the type plate.
Check components for damage and replace, if necessary. Check the O ring at the unit head for damage, then reas-
sembly the UVC unit in the reverse order. Restart the filter pump first (C1), then connect the power plug of the UVC
pre-clarifying unit (C2).
Cleaning the filter pump (F)
Take pump out of the water, unscrew the stepped hose connection including the O ring from the connection thread,
actuate the engagement hook of the filter housing, open the filter housing and remove the pump. Turn off the pump
housing, remove the impeller. Clean the pump housing, the impeller and the filter housing using clear water and a
brush. After cleaning, fit the unit in the reverse order.
Storage/Over-wintering
Put the unit out of operation at water temperatures below 8 °C or, at the latest, when freezing temperatures are to be
expected. Drain and thoroughly clean the flow-through filter, check for damage. Remove, clean, dry and store all filters
in a frost-free environment. Store the filter pump submerged or filled in a frost-free environment. Do not immerse the
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