RESIN WASHING
When the fill solenoid (3) is powered electrically, plain water circulates through the resin reservoir (10),
passing through the fill circuit until it reaches the bottom of the sump. In effect, the water follows the same
path described in “Water Fill Circuit” (page 14).
At the same time, the motor (18) is actioned in the drain direction, and drains off the water as it arrives.
The reset solenoid (13), too, is actioned to reset the reservoir, thus ensuring that the volumetric control
reservoir (12) is drained of any residual water remaining after this phase.
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