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Characteristic ventilation curves
The following diagrams show the Air
Flow/external static pressure ( in the
mouth ) of the TDA units.
These curves are referred to a 3-row
cooling coil unit.
For units with different coils and/
450
400
350
300
250
200
150
100
50
0
400
FLOW RATE
GA grille
SR anti-freeze damper
Mixing chamber 2 Damp. with SM filter
FAF filter (*)
4R coil
3R direct expansion coil
BP after-heating coil
BR electric coil
PM supply plenum
GM supply grille
(*) 0% dirt
(**) Not significant
Selection, installation, use and maintenance manual
or with an after-heating coil and/or
other accessories, it is necessary to
reduce the effective static pressure
of the pressure drop relating to the
above-mentioned components to
their specific air flow values.
TDA 09-3R
500
600
Portata / Air Flow [m
m³/h
400
Pa
-6
Pa
(**)
Pa
-7
Pa
-6
Pa
-3
Pa
1
Pa
-2
Pa
(**)
Pa
(**)
Pa
(**)
The values of these air flow drops can
be obtained from the tables beneath
the charts.
700
3
/h]
500
600
-9
-12
(**)
(**)
-11
-15
-10
-13
-5
-6
2
2
-3
-4
(**)
(**)
(**)
(**)
(**)
(**)
9
TDA range
Air conditioning unit -
800
700
800
-16
-20
(**)
(**)
-19
-25
-18
-23
-9
-11
3
4
-5
-7
(**)
(**)
(**)
(**)
(**)
(**)
900
900
-25
(**)
-31
-28
-13
5
-9
(**)
(**)
(**)
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