Airwell Airflow 2020, Installation And Operating Manual

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5 - AERAULIC CONNECTIONS
Size 200-300 650
A Air exhaust Ø 200 mm Ø 250 mm
B Ambient air return Ø 200 mm Ø 250 mm
C Ambient air distribution Ø 200 mm Ø 250 mm
D Fresh air intake Ø 200 mm Ø 250 mm
5.2 AIR DISTRIBUTION / EXHAUST SYSTEM
5.1 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.
Here are some indications, as a simple checklist to support the installer and the designer of the installation.
•
AIR RENEWALS = 0,5 volumes per hour , max 1 volume per hour ; in the volume are not considered the extraction
rooms (kitchens, bathrooms, etc.)
•
AIR SPEED included between 2 and 3 m/sec (it guarantees the system silence)
•
RETURN AIR in the kitchens / bathrooms / rooms with vapours, unpleasant odours
•
SUPPLY AIR in the living room , bedrooms , studies etc....
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.
•
Thermically insulate the supply ducts to avoid heat losses and condensate.