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B. Preparing the filter for cartridge disassembly:
1.
Disconnect the filter form the process water system by closing the upstream
(the entry point of unfiltered water to the
filter)
and downstream
(the exit point of clean water from the filter)
manual valves.
2.
Drain the filter housing by manually opening the drainage butterfly valve located at the lower side of the filter
body.
3.
Make sure that Piston#40 is pushed out of the cartridge to ensure that the spray nozzles are not within the
cassette package limits:
i.
Remove the plug from the flange of the tail assembly.
ii.
Insert a clean and straight 4.5 meter 0.5” pipe or rod
(the Tune-up rod)
through the opened connection.
iii.
Using the rod push the piston all the way in.
iv.
Remove the rod out of the filter and reassemble the plug.
4.
Lock the Index Piston in its “out” position: