Initial Backwash Media Lifted Into Control Head - Clean Water Systems 7500 Installation & Start?Up Manual

7500 Sediment Filter Installation & Startup Guide

Initial Backwash Media Lifted Into Control Head

Sometimes, when doing the Initial Backwash, the media gets lifted up into the control head.
You can tell this happened because you will have little or no flow, either going out to drain
while in the backwash positon, or when in the service positon.
To remove media from a control head, do the following:
1) Put the Inlet Bypass in the Closed position.
2) From the Service Mode, initiate a manual regeneration, by pressing and holding the regen
button (button on far left).
3) The valve will advance to the BW (backwash) position, and start counting down. Press the
Regen button again, and wait for the valve to advance and stop at the Rapid Rinse (RR) position.
4) With the valve in the RR position, open and close the Inlet Bypass valve several times. After
the third or fourth time, leave it in the open position and check the drain line- do you have a
good solid flow? 90% of the time, the answer is yes, but sometimes, even after opening and
closing the valve many times, you still don't have good flow... But, in either case (good or no
flow), continue...
5) With the Inlet Valve OFF, Advance the valve back to Service position again, and again press
and hold the Regen button, we are putting the valve back to the Backwash position.
6) Open the Inlet valve just enough so you can hear the water passing thru the valve- you
should notice a corresponding slow flow out of the drain line. After a minute, if there are no air
bubbles present, open the valve about another quarter inch- again, you should see a
corresponding increase in the flow... And you will continue until the valve is full open.
IMPORTANT:
Any time that you are in the Backwash or Rapid Rinse position, you may need to unplug the
power- this will hold the valve in its current position, so it doesn't 'time out' and go to the next
position. When you plug the valve back in, after a minute it will return to where it was when
you unplugged it (i.e. 2:32 remaining in BW). Understand, it is not possible to jam media into
the head while in Rapid Rinse, or Service, just in the Backwash, when the flow direction is
reversed.
What you are trying to accomplish, after you have pushed the media back in to the tank in the
Rapid Rinse position, is to get the Inlet valve all the way open in the Backwash position, without
it jamming media back in the head, and this is the part where you have to go slow, open up the
Inlet valve a little bit at a time and let it run for a few minutes- this is why you may have to
unplug it- and then, once you have done that, finally, do one more backwash, starting with the
Inlet valve open, just as it will be when it does it automatically at night. Once it does that
successfully, you are done.
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