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Operation and Maintenance Instructions
Envistar Top 04-21
DSET.181201.00.EN
Continuous product development may give rise to specification changes without notice.
6.2 Filter
Filter (code ATEF)
The air filters in an air handling unit are designed to prevent dust
and other impurities from entering the building. They should also
protect sensitive components inside the unit, e.g. water coils and
heat exchangers, from exposure to impurities.
The dust separation efficiency varies considerably between
various filter types. The dust collecting efficiency also varies
substantially.
It is therefore important to use filters of the same quality and
capacity when you change them.
According to guidelines for hygienic design VDI 6022 Part 1: The
supply air filter must be class ePM1-50% (F7) or have a greater
filtration efficiency.
The filters are designed for one-time use. If they become
fouled, the unit will lose capacity. The filters should therefore be
changed if the pressure drop across them exceeds the specified
final pressure drop.
It is important to stop the unit before changing filters to prevent
dust from coming loose and being drawn into the unit. The inside surfaces of the
filter sections should therefore also be cleaned when the filters are changed.
Filter for the Home Concept (code ATET-08) version
The filter cabinet is an optional extra for the Home Concept version and can be
used for
• aluminium filter on the extract air side
• carbon filter on the supply air side
Filter
AL
C
AL - aluminium filter, C - carbon filter, Black Ridge
