System Clean Valve Positions.
Clean/flush tank outlet valve (1) - open.
All other automatic valves - closed.
Shutdown. When the ROWPU is shut down and drained, open all manually operated automatic valves to allow complete
Partial Manual Operation of Automatic Valves During Backwash of Media Filter. Use this procedure to manually operate one
or two automatic valves according to the following sequence. (Refer to Figures 1-11 and 2-2).
The manually operated automatic valve(s) must be properly opened or closed at the same
time as the automatic valves cycle.
Backwash step 1, drain down after pushing INITIATE (8) on main control panel (approximately one minute).
Clean/flush outlet valve V5 (1) - closed.
Media filter inlet valve V16 (2) - open.
Backwash inlet valve V15 (3) - closed.
Backwash outlet valve V17 (4) - closed.
Media filter outlet valve V35 (5) - open.
Media filter flush valve V36 (6) - open.
Air backwash valve V22 (7) - closed.
2-158.4 Change 12