Heavy Duty Axial Roof Unit
- Robust, heavy duty construction.
- New Generation downflow supply air units can also be supplied.
- Adjustable pitch impellers provide performances to suit a wide range of applications.
- Impellers can be GRP, aluminium, nylon or anti-static to suit the application, GRP is standard.
- Shutters are a standard component for the RVE and RSS models and are an optional extra for the RDE units.
- Can be mounted at angles up to 30°.
- All standard motors are speed-controllable using variable speed drives.
- Can be used for free intake and ducted applications.
- Multi-speed motors, as well as motors to meet Ex d, Ex e, Ex nA and Ex tD standards can be supplied.
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The heavy duty New Generation Series of axial roof units has been designed for a wide range of free intake and ducted applications. These exhaust fans are suitable for a wide range of commercial and industrial applications for handling clean air through to smoke-spill. There are 9 sizes in the series extending from 315 to 1250mm diameter.
- Product Overview
Features and Benefits
The New Generation RSS Series of smoke-spill fans has been fully tested to meet the air performance and high temperature requirements of Standards AS/NZS1668.1:1998 and AS4429:1999.
Discharge Damper Fail-open Latching
An additional requirement of AS/NZS1668.1:1998 with respect to un-sprinklered buildings (300°C for 30mins) requires dampers to fail-open during smoke spill operation. The fail-open discharge damper latches come in two forms; the first being a manual release type requiring manual closing after the fan has been run. The second design, an electro-mechanical type permits the shutter latch to release and close automatically after the fan stops. For advice on smoke-spill wiring requirements refer to AS/ NZS1668.1:1998.
Mushroom cowls limit water ingress in a range of weather conditions.
Thermistors can be provided on all motors except when standards specifically exclude their use.
All units tested to BS848:Part 1, 1980 (airside performance) and BS848:Part 2, 1985 (sound performance).
Accurate selections, including comprehensive Noise Data, can be obtained from your local Elta Fans office or from our Product Selection Program. Refer to Elta Fans for performances at speeds other than shown. When shutters are fitted ensure the roof unit is mounted with the shutter spindle pointing down the roof. When shutters are fitted to the RDE models derate the performance by 15-20%. Where prevailing winds are high we recommend the fitting of Magloks®. For capacities greater than shown for the New Generation Series refer to the HC and SS series.
Galvanised steel bases; cowls/wind bands are of plastic, fibreglass or galvanised steel. The RVE and RSS models are all steel construction. Impeller blades can be GRP, aluminium, nylon or anti-static to suit the application. GRP is standard.
The fans are built with squirrel cage induction motors with sealed for life ball bearings. Motors to suit a wide range of voltages and frequencies can be supplied. Motors with 2-speed windings, or to meet Ex d, Ex e, Ex nA and Ex tD Standards, can be supplied. When fans are required for non-standard air applications this must be nominated at the time of enquiry.
Speed controllable using variable speed drives.
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