Filter Backwash Procedure - Pentair Sand Dollar SD40 Guide D'installation Et D'utilisation

Filter Backwash Procedure

1. Stop pump.
2. Be sure the suction and backwash lines are open so that water is free
to come from the pool and flow out the backwash line. Set control
valve to "Backwash" position.
3. STAND CLEAR OF FILTER and start pump.
4. Backwash filter for approximately three (3) minutes or until backwash
water is clean.
5. Stop pump and set valve to "Rinse" position.
6. STAND CLEAR OF FILTER and start pump.
7. Rinse the filter for approximately 30 seconds.
8. Stop pump and set valve to "Filter" position.
9. Be sure the pool return line is open so that water may flow freely from
the filter back to the pool.
10. Open manual air bleeder on filter. STAND CLEAR OF FILTER and
start pump.
11. Close manual air bleeder on filter when a steady stream of water
emerges from the bleeder.
12. The filter has now started its filtering cycle. Be sure the water is
returning to the pool and take note of the filter pressure.
13. The filter pressure in Step 12 above should not exceed the pressure
originally observed on the filter when it was initially started. If after
backwashing, the pressure is 4 to 6 psi above the start condition it will
be necessary to chemically clean the sand bed.
To prevent equipment damage and possible injury,
always switch pump off before changing valve position.
Pump and Sand Filter System Installation and User's Guide
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