The RSS Series of axial roof units are fitted with adjustable pitch impellers enabling a wide performance range to be obtained from any one unit. They are designed for exhaust applications, handling clean or toxic fumes through to smoke spill. Construction Galvanised steel cowl. Impeller blades are aluminium. Shutters are fitted as a standard on these units; ensure that the flap hinge points down the slope. Motors Type - squirrel cage induction motor. Electricity supply - 415V, three-phase, 50 Hz. Bearings - ball. Motors are selected to suit the application and motors with 2- speed windings can be provided. Motors complying with EN12101-3:2002 Standards can be fitted on request. Refer to AMS for full details. Refer to Reference Information p.J-2/3 for details on motors. Testing Air flow testing: - 500-1000mm diameter - BS848:Part 1,1980 1250-1800mm diameter - ISO5801:1997 Noise testing, all sizes to BS848:Part 2, 1985 |