AmeriWater CW330 Series, Руководство по эксплуатации и установке

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24 6/07
Backwash sequence of operations
Once a backwash has been initiated by any of the above methods, the sequence of events that
follows will always be the same. The sequence is as follows:
1) If a filter is using city water for backwash, the pump goes off. If the filter uses system
water for backwash, the pump will be deactivated until the cycle valves turn , and the pump is
reactivated.
2) On single and multiple tank filters, all service valves (1&2) close at the same time. Event time is 60
seconds.
3) Tank #1 backwash indicator light is illuminated.
4) Tank #1 backwash valves (3&4) open. Backwash duration is 5 minutes.
5) When Tank #1 backwash is complete the indicator light is extinguished.
6) Backwash valves (3&4) close.
7) Steps 3 through 7 are repeated for each additional tank for multi-tank systems.
8) After all tanks have been backwashed, all service valves open. Event time is 60 seconds.
9) The pump returns to run mode and the CW Series Filter returns to service mode.
Aborting the backwash
In certain situations, it may be desirable to abort a backwash. A backwash in progress can be
aborted by pressing and holding the “manual backwash” pushbutton for a period of 10 seconds.
NOTE: If the backwash is being initiated by demand from the differential pressure switch, the
backwash will be delayed only briefly. Demand for a backwash will continue until the
differential pressure is brought below the preset threshold.
Automatic backwash timer
The backwash timer will automatically initiate a backwash at pre-determined intervals. The standard
interval is every 24 hours. This can be changed to a 7-day interval by installing a fuse in the fuse
holder labeled 7 for closed loop systems. Consult your AmeriWater representative for information.
Setting the automatic timer
The 24 hour or 7 day automatic backwash timer can be reset to zero by pressing and releasing the
“manual backwash” pushbutton on the control box 5 times within a 5 second interval. All backwash
indicator lights will flash twice to confirm the change. Thereafter, the CW Series will backwash 24
hours or 7 days from the time you reset the timer, unless a manual or on demand backwash is
initiated.
Note: In the event that electrical power is removed from the control box, the timer cannot continue
counting but will maintain the count it held when power was lost and continue counting when
power is restored. The backwash schedule will be delayed by the amount of time the power was off.
If the backwash time is important, the timer will need to be reset to bring it back on schedule. See
above paragraph for timer resetting instructions.