You can do so by installing a gravel layer at the bottom of the shaft. An optional immersion pump
with a float switch that is connected to a canal or drain additionally protects your filter system from
rising water inside the shaft.
- Ensure sufficient natural ventilation of the shaft to prevent condensation.
- Design the size of the filter shaft so that you can carry out work on the filter system.
Description of the filter system
Modes of the filter system
Your filter system has several modes. They are indicated by numbers on the valve head.
1. Filter
2. Rinse
3. Circulate
4. Backflush
5. Closed
6. Drain
7. Winter
The individual modes are described below.
FILTER
Use this mode as the basic setting of your filter system.
The sucked-in pool water flows into the filter vessel through the top and flows through the filter medium.
Dirt is filtered out in the process and the water is returned to the pool afterwards.
RINSE
Let the pump run for 20 to 30 seconds in this mode right after backwashing, refilling the quartz filter
sand or after initial start-up.
The water is guided into the top part of the filter vessel and the valve head is rinsed. The water drains
via the dirt line. The valve head is cleaned this way.
RECIRCULATE
Run this mode after treating the water with chemicals.
The water is guided directly from the valve head to the pool without flowing through the filter. The filter
medium does not come into contact with the applied chemicals this way.
BACKFLUSH
Let the pump run in this mode for at most 2 minutes if starting it up for the first time or after filling the
unit with new quartz filter sand, or if the manometer shows 0.3 to 0.6 bar above the normal operating
pressure, to clean the filter and the quartz filter sand.
The water is guided into the bottom part of the filter vessel and flows through the entire filter.
Accumulated dirt is knocked loose and flushed out via the backflush line.
CLOSED
- Never switch on the pump in this mode!
Use this mode to clean the prefilter (if available) or checking the system for leaks and sealing the
affected spots.
The water flow in the pump and in the filter is blocked. Make sure that feed and drain hoses are filled
with water and might have to be closed off with shut-off valves or plugs.
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NOTICE!