Vents VPVO Series User Manual page 9

Mounting in case of no ductwork upstream of the fan
If the ductwork is not available at the fan inlet, the inlet cone VK-VO must
be installed to improve aerodynamic parameters of the air flow.
Mounting in case of no ductwork downstream of the fan
If the axial fan is the terminal device of the ventilation system (i.e. there
is no downstream ducting), the unit must be equipped with a diffuser to
reduce the air flow velocity and the fan dynamic pressure. Reduction of
the air discharge velocity results in a significant reduction of shock losses
which are proportional to the square of velocity decrement.
Installation of a downstream contractor is not recommended.
Installation near bends
To install the fan directly downstream of a bend (elbow) use a curved section with a large bending radius or an array of internal guide vanes.
• When installing the fan in an air duct, connection to the air ducts is made by means of flanges.
• The O-VO carriers are used for mounting the fans to the floor, walls or ceiling. The carriers are fixed to the ceiling by means of the threaded expansion
anchors and mounting studs. Fix threaded expansion anchors to attach the carriers to the floor or to the wall.
• The carriers and the fasteners are not included in the delivery set and are available as specially ordered accessories. Selection of the fasteners must be
based on material of a mounting surface and the fan weight. For details, please refer to the Technical data. The fastener selection must be performed
by a qualified technician.
After installing the unit, you need to make sure that the fan impeller rotates freely.
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Obstructed space installation
To ensure normal operation of the fan in an obstructed space make sure
to provide for a sufficient distance between the inlet and outlet flanges
and the floor, walls, bulky equipment and obstacles.
H ≥ D H ≥ D
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