Figure 2-77. Complete Manual Media Filter Backwash
Backwash step 1, drain down after pushing INITIATE (2) on main control panel (approximately one minute).
Clean/flush outlet valve V5 (3) - closed.
Media filter inlet valve V16 (4) - open.
Backwash inlet valve V15 (5) - closed.
Backwash outlet valve V17 (6) - closed.
Media filter outlet valve V35 (7) - open.
Media filter flush valve V36 (8) - open.
Air backwash valve V22 (9) - closed.
Open media filter upper drain valve V25 (11).
Open media filter vent valve V19 (10) if draining stops.
Close vent and drain valve (10 and 11) when no longer draining.
Change 12 2-161