Design features
Wolter roof fan units are suitable for mounting on different roof types.
As the motor is out of the air stream, RVH series fans can be operated at
temperatures of up to 120°C (80°C if speed-controlled motors are used,
50°C for sizes RVH 800 and above.)
Casing
Discharge and motor cowl are made of salt-water proof aluminium. The base plate with its integrated inlet cone is made of galvanised sheet steel.
Impeller
The backward-curved impellers are made of aluminium and are balanced statically and dynamically according to G 6.3 of (DIN ISO 1940).
Motors
Standard IEC motor in frame type IMB5, protection class IP55, 1~23 0V/50Hz or 3~400V/50Hz, insulation class F. Motors of fans up to size 500 are suitable for transformer-type speed control.
Electrical Connection
The motor terminal box is easily accessible after removal of the fan cowl. The motor has to be connected according to the provided wiring diagram in accordance with locally applicable regulations.
