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5.3 Air filters
Filter fouling can be determined by testing the pressure drop.
CIAT's range of AIR air handling units are fitted with pressure tappings.
The various types of filters are shown in section 3.
G2 filter
The cells must be periodically vacuumed. To remove greasy dust, the media may be cleaned with warm water (50°C max.) and detergent.
G4 filter
G4 cells are generally non-regenerative. They must therefore be replaced as often as necessary. During assembly, make sure that the
screen is positioned on the "discharge air" side.
HPS bag filters (F6, F7, F8)
Bag filters last a long time but are non-regenerative. They must be replaced when they are clogged. Check the condition of the fasteners
and gaskets. Bag filters may be fitted in compressible channels or encased in universal frames with gaskets.
High-efficiency and HEP filters (H10-H14)
These come in large-media frames. Follow the assembly and maintenance instructions provided with the cells.
Carbon filters
There is no way to know when breakthrough will occur on a carbon filter.
Its service life depends on how it is used:
- type of impurities to be filtered,
- concentration of these impurities,
- average usage time,
- air flow.
To find out the how long a filter will last under your specific conditions of use,
contact the manufacturer of the filter.
Wear gloves and protective clothing when changing the filters. Place the dirty filters inside bags.
Droplet separator
Depending on the type of extraction, the separator frames can be disassembled as follows:
Side extraction:
1.
Remove the separator's side access panel (4 screws)
2.
pivot the 2 retaining brackets to release the separator (1 at the top, 1 at the
bottom)
3.
pull the separator towards you to remove it from the unit
Frontal extraction:
1.
open the separator's access door (opening handle)
2.
pivot the 2 retaining brackets to release the separator frames
(1 at the top, 1 at the bottom)
3.
detach the frame from its runner in the direction of the air flow (removal via a recess in the runner)
4.
if the separator is made up of several frames, slide the second one to position it opposite the recess and detach it, etc.
When refitting, remember to lock the frames using the retaining brackets.
Compressible track
Universal frames
Frame
Frontal
extraction
Side
extraction
Retaining
bracket
