48" AGF 910101-001049 / 01.2020
Page 15 of 21
Maintenance
1.
General Inspection
In order to check the proper operation of the filter, initiate a self-cleaning cycle: check that the backwash valves open and
close properly and verify that by the end of the process, clear water flow out of the drain.
2.
Periodic Inspection
1.
Check for leaks from the connections and fittings. If you found any leaks, fix them and re-secure the connections if
required.
2.
Start a manual backwash cycle and complete it.
3.
When the filter is not in use for a long period of time, it needs be drained after having been disinfected, and left in a
dry environment until reuse.
4.
In environments where freezing conditions occur, open all filter covers and totally drain the water out of the filtration
system. When the filter is drained, close the upper covers.
3.
Annual Inspection
1.
Once a year, stop the filter’s operation, drain it, close all the valves and release any pressure.
2.
Open the filter's upper service port and visually inspect the media position. If media level is below the initial line, re-
check the flow control valve on the drain manifold to see that the media is not washed out.
Otherwise, make sure
that the distribution nozzles are not damaged.
3.
If needed, complete the missing amount of media up to the required level as described on page 14.
4.
Close the service port, restart the system and perform several backwash cycles before returning the system to regular
operation.
4.
Replacing the Media
1.
The media is replaced depending on a few parameters and the specific media type. Consult your local dealer and/or
the manufacturer if a replacement is needed.
2.
Close all the valves and verify that no pressure remains in the filter tank.
3.
Open the top service port cover.
4.
Open the 3” plug on the lower cover, or start the pump (if installed), and drain all the water and sand from the filter.
Remove the lower cover for faster draining. Do not use sharp tools to help remove the sand as distribution nozzles
can be damaged.
5.
Rinse and clean the inside of the filter tank.
6.
Check the distribution nozzles.
7.
Close the 3” plug and reinstall the lower cover (make sure threads and sealing areas are free of media particles).
8.
Fill the tank with water until all the filter nozzles are covered and add the new media as described on page 14.
9.
Open all the valves for normal operation, and readjust the flow control valve on the drain manifold. See instructions
on page 11 for further instructions.
