Casing
Constructed from self-supporting corrosion-resistant extruded Aluminium section, assembled with aluminium corners and 25mm thick double skinned removable panels, manufactured from pre-galvanised steel, in-filled with a non-flammable mineral wool, 60kg/m3, thereby minimising breakout noise.
Motors
Three phase multi-voltage IP55 TEFC Foot / Flange mounted IEC frame motors, wound for either (Delta) 230V/3Ph/50Hz or (Star) at 400V/3Ph/50Hz connection, suitable for speed control when used with the Eltadrive VSD range of frequency inverter controls.
Impellers
Impeller shall be a high efficiency backward curved EN-AW 5754 aluminium with a non-overloading power characteristic, dynamically balanced to G6.3 according to ISO1940 part 1.
Control
Units shall be suitable for use with Variable frequency drive.
Design
The unit shall be designed and manufactured with procedures as defined in BS EN ISO 9001. Airside performance shall be tested to ISO 5801 and BS ISO 13347-1 for sound performance.