mundoclima Aerotherm BCC 200 CONNECT Manuel D'installation, D'utilisation Et D'entretien page 121

Aeraulic design criteria
The dimensioning and the correct execution of the aeraulic
connections are critical to ensure the unit operating and an
appropriate level of quietness in the served area.
Pressure loss in the duct will reduce the air flow, which can
cause a reduction in efficiency of the unit.
Air duct connection

If the duct outlets for the outdoor air inlet and exhaust are
outside of coverage, must end with a 90 ° bend downward, to
prevent entry of water from the air inlet.
To perform the ductings:
 Connect the ductings fixing them to the connections with the
special hookings to the circular flanges.
 The duct weight should not lie on the connection flanges.
 Put antivibration joints between ducts and units.
 The connection to the flanges and among the different duct
sections must guarantee the air seal, avoiding air dispersions
in supply and return that penalize the overall efficiency of the
installation.
 Limit the pressure drops by optimizing the path, the type and
the number of curves and branches.
 Use curves of large radius.
 For unit air outlet with duct, when unit operating, condensate
will be generated aroud outside of duct.
 Thermically insulate the supply ducts to avoid heat losses and
condensate.
7 AERAULIC CONN ECTIONS
N ote
Unit attacks 200
Unit attacks 300
R - External air return
M - Air supply