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The matching rule of Duct Fresh Air.
Duct fresh air unit Connection method
Quantity of
duct fresh
air
Outdoor unit selection
Quantity of
outdoor unit
AD482MPERA
Fresh air unit only 2 10HP 1
Together with general
indoor units
1 Minimum outdoor capacity 18HP. Min. 18HP
AD722MPERA
Fresh air unit only 1 8HP 1
Together with general
indoor units
1 Minimum outdoor capacity 18HP. Min. 28HP
AD962MPERA
Fresh air unit only 1 10HP 1
Together with general
indoor units
1 Minimum outdoor capacity 18HP. Min. 36HP
The matching rule of mixed connection of Duct Fresh Air and general indoor units in one system.
■ Because the return air of Duct Air Fresh is from outside, in which the temperature difference is higher than normal
indoor air return type, in order to ensure the cooling/ heating effect, the matching must simultaneously satisfy the
following two conditions:
1. C*80%≤A+B≤C*100% (80% total outdoor capacity ≤ total indoor capacity ≤ 100% total outdoor capacity)
2. A≤C*30% (the fresh air capacity ≤ 30% total outdoor capacity)
■ When in mixed installation
Only one Duct Fresh Air can be connected in one system.
Not recommend to install more than one Fresh Air Units in one outdoor system
(either modular or combination system)
Notes:
Location of Duct Fresh Air Installation:
■ Compared to general indoor units, the sound pressure level of Duct Fresh Air units is larger, so it is not
recommended to install Duct Fresh Air at locations as Hall, ofce building, etc, where numbers of persons will
stay.
■ It is recommended to install Duct Fresh Air units at places insensitive to sound pressure level.
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