Vents VPQ 710, User Manual, Page: 10 / 20

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VDO
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Fan installation with no upstream ducting
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.
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
D
H ≥ D
H
≥
D
D
Fan installation with no downstream ducting
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.
The fan should not be equipped with a downstream contractor.
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.
• In-duct installation requires flanges to attach the fan to the ductwork.
• 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. While choosing fasteners
consider the material of the mounting surface as well as the weigh of the fan, refer to the “Technical data” section. Fasteners for unit mounting
should be selected by the service technician.
After installing the unit, you need to make sure that the fan impeller rotates freely.