7800 Carbon Filter Installation & Startup Guide
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Rev 120215
2.5 Cubic Foot Model: 10 GPM recommended
31.
The next cycle is the Rinse cycle and this runs for 6 to 8 minutes. After the backwash, the 7800
will automatically advance to the rinse cycle.
32.
After the Carbon filter has gone through the backwash and rinse, press and hold the Manual
Regen button for three seconds and repeat the backwash and rinse. This is the same procedure
that needs to be done each time you add Carbon media in the future, that is, the Carbon media
must be thoroughly backwashed and rinsed.
Troubleshooting the 7800 Carbon Filter
One problem that may occur is if you do not have enough backwash flow rate to properly clean the
Carbon filter. You can verify the backwash flow rate by running the drain line into a bucket and timing it
when the 7800 is in Cycle 1 or backwash. A 1.0 or 1.5 cubic foot system should have 5 gallons per
minute and a 2.5 cubic foot system should have 10 gallons per minute of backwash.
In some cases, the 7800 may not be programmed correctly. See the 7800 service manual for instructions
on how to access the master programming.
How To Remove Media From 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.
