Filter sand tank flushing and backwashing

1. Check the filter function before starting the machine* - Before starting the machine, the multi-way valve of the filter sand tank should be adjusted to the filter (Filter) state; * - Check whether the corresponding valves on the pipeline are in the correct state; * - Check the hair collector Whether it is blocked, if it is blocked, it must be cleaned first; check whether there is air in it, if there is air, the air must be discharged first; * - Check whether the lid is tight and airtight, if there is air leakage, The lid of the tank must be tightened to make it airtight; * - Check whether the liquid medicine tube of each dosing system is normal and unblocked, whether there is still liquid medicine in the medicine barrel, and whether the valve on the mouth of the dosing device is opened to ensure dosing The system is in the state of preparation; * - Check whether there is air accumulated in the main return water pipeline, if there is, it must be eliminated through the drain valve; Start sequence* - Turn on one water pump motor first; after the water pump motors are running normally, turn them on in turn Water pump, backup pump does not need to be turned on; * - Check after starting: Record the index of the pressure gauge on the filter to check whether backwashing is necessary; check the operation of the water pump to see if it is running smoothly without noise; check whether the dosing systems are operating normally; go to the swimming pool to visually check whether the water outlets of each water injection port are normal. 2. Check the backwashing function of the filter before starting up* - If the reading of the pressure gauge on the sand filter tank is higher than 2.5kg/cm2 or above, it is necessary to backwash the sand filter tank immediately; * - Confirm that the sand tank needs to be backwashed *-Adjust the multi-way valve on the sand filter tank to the backwash state; *-Confirm that the relevant valves on the pipeline are in the correct position; Backwash sequence*-Run the water pump first; check and observe Clean the water mirror on the sand tank until the water is clean; then turn off the water pump. Note: If it is impossible to check the backwash water, the duration of each backwash is preferably 2-3 minutes.

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