Installation site requirements
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AHUs must be installed on a level and stable foundation.
The maximum tolerance to the
horizontal is s = 0.5 % (slope).
Fig. 4: Maximum incline
This corresponds to a maximum
inclination angle of α = 0.3°.
Fig. 5: Maximum inclination angle
The frames of the casing connection
must be parallel to each other.
Irregularities must be compensated by
appropriate supports (e.g., sheet metal
strips).
Fig. 6: Compensating unevenness
The foundation must meet the on-site requirements for statics, acoustics, and
professional water drainage (e.g., pan drain). Install AHU at a sufficient height to the
floor to ensure the required siphon height (see chapter "Condensate, drain and
overflow lines", page 33).
The natural frequency of the support structure, especially in case of steel structures,
must have sufficient distance to the excitation frequency of rotating components (e.g.,
fans, motors, pumps, compressors).
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