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The black plug must be removed for the pressure side installation (see Figure 110).
6.4 Duct connection
The air conditioning work must be executed tension and torsion free.
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To prevent structure-borne sound transmission is an intermediary flexible connector recom-
mended with at least 140 mm width. It shall be installed unstrained between the duct and the
AHU.
Ensure proper performance of the AHU by avoiding of excessive pressure drops in the duct. To
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minimize the noise, the basic rules of the duct construction and acoustic design shall be ob-
served.
Figure 109: Pressure side execution
Figure 110: Pressure side installation: remove the black closing plug
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