How To Load The Media Filter - Nobel FCD 05 Instruction Manual

4.5.

How to load the media filter

The media filter must be loaded inside the vessel afterthat the placing of the filter is
completed or in the case the media have to be replaced.
• Open both the side man-holes
• Check that the filter nozzles are correctly fixed and not damaged.
• Load the supplied quartz-sand (2-3 mm size for FCD and FFD filters, 1-2 mm size for FACD
filters) into the vessel, through the lower man-hole, until the sand covers completely the filter-
nozzles. Make a flat surface of the sand using a wooden tool, in order to avoid any damage
to the coating of the vessel.
• Close the man-hole, after checking the integrity and correct position of the gasket, by
tightening the nuts.
• Load the rest of supplied media filter into the vessel, through the upper man-hole (or through
the upper head, see components drawing). The media filter are shipped separately; check
that the shipped and available quantity complies exactly with the quantity listed in the Weight
Table (see § 3.5 pag. 7).
Filtering media must be loaded, one after the other one, and according to the following order:
◊ quartz sand 2÷3 mm (only for filters FCD and FFD)
◊ quartz sand 1÷2 mm (only for filters FCD and FACD)
◊ quartz sand 0.4÷0.7 mm (only for filters FCD)
◊ anthracite (only for filters FCD)
◊ activated carbon (only for filters FACD)
Take care to make a flat surface of each layer of sand, before load the next one.
(For FFD filters only : after loaded the quartz sand 2÷3 mm, load 3 bags of quartz sand
0.8÷2 mm and 2 bags of PL, alternately (one bag of quartz-sand then one of PL, and so on).
NB: The alternating loading is required in order to mix the two kind of media (quartz-
sand 0.8÷1.2 and PL) supplied; the mixing will be properly completed by featuring
the first backwashing .
• After completed the loading, close the upper man-hole (or upper head), after checking the
integrity and correct position of the gasket, by tightening the nuts
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s.r.l.Milano - ITALY
INSTRUCTIONS MANUAL AUTOMATIC FILTERS
FCD-FACD-FFD /DT /DP /DT-DUAL /DP-DUAL
Page 10 of 23 r.4
fcd-dp_mi-r4.doc –