BWT P-FI 400 - The Filter Pressure Rises 0.3 Bar or more above that Indicated by the Red Needle of the Pressure Gauge; Winterizing

7.2 The lter pressure rises 0.3 bar or more above that indicated by
the red needle of the pressure gauge
the lter needs to be cleaned
• Stop the pump,
• Check that the prelter is clean (remove any build up of dirt as described previously),
• Switch the multiport valve to «BACKWASH»,
• Turn the motor on,
• Monitor the colour of the water through the transparent section of the drain union
• Caution, there will be a lapse of a few seconds before cleaning starts (water becomes very cloudy),
• As soon as the water in the transparent section of the drain union runs clear, stop the pump,
• Switch the multiport valve to «RINSE»,
• Turn the pump on for 20 to 30 seconds, this is to remove any dirt or debris remaining in the main valve and
settle the sand,
• Stop the pump,
• Switch the multiport valve to «FILTRATION»,
• Turn the pump on.
After backwashing the black needle should re-align with the red needle that marks the lter’s nominal
pressure.
If after one backwash (or even two), the pressure does not drop back to the nominal pressure, call your
installer.
8. WINTERIZING
• Carry out a prolonged backwash of the lter,
• Treat the pool water,
• Stop the pump,
• Switch the multiport valve to «DRAIN»,
• Turn the motor on,
• Lower the water level by approximately 30 cm,
• Empty the lter by opening the lower drain,
• Close all the valves,
• Unscrew the motor drain plugs,
• Disconnect the electrical supply at the switch box,
• Store the motor in a dry place.
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2021/01 - Indice de révision : G - Code : 26650 FILTRATION