Sand cylinder function: 1. Filtration function—FILTER normal filtration. 2. Backwashing function—BACKWASH backwashing, discharges the dirt accumulated in the sand tank. 3. Positive flushing function—RINSE discharges the residual dirt in the water pipe after backwashing.
4. Drainage function—WASTE drains water directly without going through sand tank circulation. 5. Recirculation function—RECIRCULATE is directly discharged back into the pool by the water pump without going through the sand tank circulation. 6. Closing function—CLOSED closes the sand tank.
Backwash process: 1. Confirm that the relevant water pumps that need to backwash the sand tank have stopped running. 2. Adjust the multi-way valve on the filter sand tank to the backwash state (BACKWASH). 3. Confirm that the relevant valves on the pipeline are open.
4. First run the water pump; check and observe the clear water mirror on the sand tank until the water is clean; then turn off the water pump. 5. Confirm that the backwashing has been completed; confirm that the water pump is turned off; adjust the multi-way valve on the filter sand tank to positive flushing (RINSE); confirm that the relevant valves on the pipeline are in the correct position; turn on the water pump, check and observe the clean water on the sand tank mirror until the water comes out clean; then turn off the pump. 6. Adjust the multi-way valve on the filter sand tank to the filter state (FILTER), and the sand tank is cleaned.
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