TM 10-4610-232-12
BACKWASH STEP 2: AIR/WATER BACKWASH
RAW WATER PUMP ON.
AUTO VALVES SWITCH AS SHOWN.
AIR ON.
HYPOCHLORITE PUMP ON.
VALVE V14 ADJUSTED BY OPERATOR TO GIVE 30 GPM (114 LPM).
CYCLE TAKES APPROXIMATELY 1-1/2 MINUTES.
PURPOSE: DURING THIS STAGE, AIR AND 30 GPM (114 LPM) OF WATER ARE
BREAKING UP THE PACKED MEDIA BEDS. ALSO, CHLORINE IS BEING INJECTED TO
KILL BACTERIA.
Figure 1-11. Backwash Cycle (Sheet 2 of 10)
(MODEL WTA-060 ONLY)
Change 12 1-17
