AERMEC TDA Manual De Instalación, Uso Y Mantenimento página 14

Air flow drops in the filters, due to dirt
The charts to determine the air flow
drops with different filter dirt levels
are shown below. From the left-hand
chart (showing the air flow rate -
m³/h - on the x co-ordinate), locate
the flow rate in question then go up
until you intersect the straight line
corresponding to the unit size. At
this point, by tracing a straight line
1 = CLEAN FILTER
2 = FILTER 25% CLOGGED
3 = FILTER 50% CLOGGED
Selection, installation, use and maintenance manual
parallel to the x co-ordinate axis,
intersect one of the three curves on
the right-hand chart, each showing
the degree of obstruction of the
filter, as below:
curve 1: clean filter
curve 2: filter 25% clogged
curve 3: filter 50% clogged
To determine the corresponding
14
Air conditioning unit -
value of the filter pressure drop,
trace a straight line as far as the x
co-ordinate axis.
1
2
TDA range
3