Table of Contents
Advertisement
7800 Greensand Filter Installation & Startup Guide
the backwash. However it is normal for some small amount of fines to come out during the
backwash, although you do not want to see a large amount of media coming out, which would
mean you have very high water pressure, or the drain flow control for the 7800 is missing.
33. If possible verify that the backwash flow rate. You can easily run the drain hose to a bucket and
using a watch verify the flow rate in gallons per minute. For example, if the backwash fills a 5
gallon bucket in 30 seconds, you have 10 gallons per minute or 10 GPM. An adequate
backwash is critical to properly clean the Greensand media and prevent it from cementing
together.
1.0 Cubic Foot Model: 5 GPM recommended
1.5 Cubic Foot Model: 5 GPM recommended
2.0 Cubic Foot Model: 8 GPM recommended
2.5 Cubic Foot Model: 10 GPM recommended
3.0 Cubic Foot Model: 12 GPM recommended
34. 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.
35. After the Greensand 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 Greensand media in the future, that is, the Greensand
media must be thoroughly backwashed and rinsed.
Page 13
www.cleanwaterstore.com
Rev 120214
Advertisement
Table of Contents
