Oase ProfiClear Premium TF-XL, Operating Instructions Manual

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4.1.2 Gravity fed system
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The correct installation and constant water level in the pond are important prerequisites for en-
suring optimum and fault-free operation of the gravity fed system.
Making a filter pit:
• Excavate a pit of sufficient dimensions to accommodate the filter system.
• Align the base slab horizontally.
•
Secure the walls of the pit from falling in (with masonry or concrete).
•
Ensure that the pit is protected from flooding. Provide a rain water drain.
Installing the filter system:
• Determine the max. water level for the pond.
• The base slab supporting the filter system must be 680 mm below the max. water level (max.
tolerance: -20 mm).
• Keeping the water level constant:
• A constant water level in the pond is necessary for operating the gravity fed system. Toler-
ances of up to -20 mm from the max. water level are permitted.
– If the max. water level in the pond is exceeded, water flows out of the drum filter module
via the dirt channel until the max. water level is reached again.
– If the water level goes below the max. water level by more than 20 mm, it is not possible to
achieve optimum or fault-free operation.
•
Recommendation: ProfiClear Guard automatically refills the pond with water, if the water
level drops below the permissible level.
4.2 Connecting the drum filter
4.2.1 Information regarding pipes
• Use suitable pipes.
• Do not use any right-angled bends. Bends with a maximum angle of 45° are very efficient.
•
Glue plastic pipes to ensure a permanent and reliable joint or use socket joints with clips to
stop them from coming apart.
• Standing water in pipes can freeze when there is a hard frost and cause pipes to burst. For
this reason, lay the pipes and hoses with a gradient (50 mm/m) to ensure that they can run
empty.
•
For gravity fed systems, it must be possible to shut off the supply from the pond and the
return to the pond for maintenance and repair work. For this reason, install suitable slide
valves.
•
In the case of the gravity fed system, the sum of the losses in the supply line must not ex-
ceed 7 mbar (7 cm).
– Otherwise the water level in the filter system will go below the minimum water level during
operation. Optimum, fault-free operation will no longer be possible.