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Cabinet
is designed for horizontal (CRHx) or vertical (CRVx) air exhaust. The fan base is made of galvanized steel sheet, the brackets, grille and screws are also electroplated. The fan shroud and casing are made of Al sheet metal. The fan motor is mounted in the air stream. The fan is protected by a grille against the ingress of foreign bodies.
Iris wheel
The fan is radial with backward curved blades. It is made of aluminium sheet and is statically and dynamically balanced.
Square box
with a revision switch, it is located on the base (CRHx) or housing (CRVx) of the fan. For single-phase fans, the terminal block also contains a start-up capacitor. The protection rating is IP55.
Motor
It is asynchronous with shorted resistance armature, with external rotor. The motors are fitted with a thermal fuse as standard. Windings are in tropicalisation treatment with class F insulation. IP54 protection.
Speed control
is carried out by changing the voltage by electronic or transformer regulators, three-phase types also by frequency converters.
Rotation direction
is only possible in one direction, as indicated by the arrow on the fan housing. The opposite direction of rotation can cause motor overload, and the fan will also experience increased noise.
Mounting
The fan is mounted horizontally using the accessories (with the motor axis vertical).
Noise
emitted by the fan is given in the tables.
Instructions
Fans are suitable for general air handling applications.
