■ Specification
Centrifugal roof fan with horizontal
discharge. Flat design with large
overlaying rain cowl.
■ Casing
Base plate (with inlet cone) and
other parts made of galvanised
steel. Rain cowl and protection
grille made of aluminium. Base
plate with threaded bolt for
connection of intake air accesso-
ries.
■ Impeller
High performance backward
curved centrifugal impeller made
of galvanised steel, dynamically
balanced with the motor unit.
■ Motor
Totally enclosed external rotor
motor with ball bearings, protected
to IP 44. insulated for protection
against moisture. Maintenance free
and radio suppressed.
■ Motor protection
Through built-in thermal contacts
which must be connected to the
motor full protection unit.
Explosion proof models are equip-
ped with thermal motor protection
through built-in PTC thermistor
which is connected to the tripping
unit MSA. Hereby speed control is
allowed where the minimum voltage
must not be less than 115V.