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Operation and Maintenance
Envistar Flex
DSEF191101.05.EN
Continuous product development may give rise to specification changes without notice.
Filter for the Home Concept (code ECF) 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
C
AL - aluminium filter, C - carbon filter, Black Ridge
The aluminium filter is intended for use where the extract air contains grease
particles to avoid grease being sucked into the unit. The filter is a knitted flat-
type filter. The aluminium filter can be cleaned using hot water and a mild
detergent.
The carbon filter (code ELCF) can be used in rotary units (rotary heat exchanger)
to remove odours in the form of organic and odorous gases/vapours. The
carbon filters are fitted to the supply air side.
The carbon filters are Black Ridge filters, constructed as compact and highly
efficient, molecular filters. The filters are designed for one-time use and the filter
is combustible in its entirety.
Lifespan and filter control Carbon filter
The function and lifespan of the carbon filters depends on the volume of air
that passes through and on the molecular density of odorous substances. This
means that the time intervals for filter replacement can vary from unit to unit
depending on operation mode and the volume of odorous substances in the air.
Units delivered with control equipment (code MX) are equipped with the filter
control function – FLC (Filter Lifetime Control). FLC indicates when it is time
to replace the carbon filter. Indication is through an alarm on the hand-held
terminal display.
FLC calculates the volume of air passing through the carbon filters and triggers
the alarm for filter replacement when the preset value has been reached. The
volume of air passing through is measured in mega cubic metres (Mm³). The
function does not take into account the odour content of the air, which means
that the indication should be regarded as a recommendation for checking the
filter function. If no odours pass through, there is no need to replace the filter.
Preset FLC values, as per the table below, are based on max. air flow over 12
months of full-time operation. If required, the value can be lowered in order to: -
change to more frequent filter replacement intervals for max. air flow - retain the
filter replacement interval of 12 months for lower air flows.
To change the value, see separate Climatix control documentation.
