Structural Design - SystemAir Aj8 Montage- Und Betriebsanleitung

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STRUCTURAL DESIGN

The AJR or AJ8 fan is a directly operated axial fan, the motor of which is seated directly in the airstream. The direction
of air intake is over the motor.
The external casing of the fan forms an elongated housing made of hot-dip galvanized sheet steel that has a pressed-
on flange with bore holes. The fan has silencers on both the inlet and pressure sides. The silencers are equipped with
retracted nozzles and safety guards and made of galvanized steel. The acoustic insulation around the entire fan unit is
non-flammable in accordance with DIN 4102 as described in Council Directive 97/69 EC. The silencer mounted on the
pressure side is equipped with a cross-shaped air baffle for stabilization of the air current. For optimal guidance of the
air current, a deflector made of galvanized sheet steel (delivered separately) is available as an accessory for installation
on the pressure side silencer.
Mounting brackets made of galvanized sheet steel are installed on the fan at the factory.
Model
With model AJR, the fan unit can be removed for maintenance purposes without disassembling the entire device. To do
this, remove the two tensioning fasteners on the side of the fan.
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In the standard versions, the fans are equipped with three-phase motors (400 V, 50 Hz) with built-in PTC
resistors. The electric motor has IP 55 protection and isolation class F, while the smoke extracting fans have IP
54 protection and isolation class H. The two-speed version is available with a motor with tapped winding
(Dahlander motor).
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The motor with impeller is fastened to a rugged supporting structure made of electro-deposition-galvanized sheet
steel.
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The axial fan is made of a cast aluminum alloy and is equipped with molded blades and an efficient hub ratio.
The hub design permits infinite adjustment of the blade angle when the impeller is halted. The components are
dynamically balanced in accordance with ISO 1940 T1, Class G 6.3.
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The electrical connection is made through a terminal box installed on the outside of the housing. Standard
version: polypropylene; protection rating: IP 65. The smoke-extracting fan (B) is made of cast aluminum alloy
with IP 65 protection.
Main Components of Jet Fan with Accessories
Status: 14.10.2008
AJ8: Octagonal version
AJR: Round version
Systemair GmbH, Seehöfer Str. 45, 97944 Windischbuch
Phone: +49 (0) 7930/ 92 72 0, Fax: +49 (0) 7930/ 92 72 92
E-mail: info@systemair.de, Internet: www.systemair.com
Jet Fans (e)
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