14 FILTER INSTALLATION AND USER GUIDE BARRIE • ONTARIO • CANADA 705.733.8900 WWW.EXCALIBURWATER.COM 3) CONTROL VALVE 3.1) Control Valve Functions and Cycles Service Operation: - This is the normal cycle when inlet water flows downwards and get filtered after passing through the Ozone gas and Zentec Media. Backwash Cycle: - In this cycle water flows in reverse (upward) direction to the drain line which expands the media. The backward flowing water washes away the collected iron and other metals. Draw/Ozone Cycle: - In this cycle ozone gas is siphoned in the mineral tank and water slowly flows through the drain line SERVICE DRAW / OZONE BACKWASH
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