designed for use in commercial ducted exhaust applications. These compact and low profile units are fitted with birdmesh to prevent the entry of birds and vermin into the ducting or building. They are available in 9 sizes, extending from 250 to 630mm diameter. Typical Applications Exhaust air from a wide range of commercial applications such as factories, warehouses and workshops, change rooms, bulk goods retail outlets and assembly halls. Features • Robust, lightweight construction. • Choice of speeds available. • Compact, low profile design. • Designed for downflow or vertical exhaust applications. • Shutters are an optional extra for single fan units. The pressure loss across the shutter has to be added to the system pressure before making selections. • Can be mounted at angle up to 30°. • Most 3-phase motors are 2-speed star/delta design. Construction Cowls are UV-stabilised plastic. Impellers are Mixed-Flow design and made from high performance injection moulded composite material. Steel components have a corrosion resistant finish. Bird-mesh guards are fitted as standard to both downflow and vertical exhaust models. Internal Thermal Protection Thermal protection is supplied as standard on all motors. Testing Air flow tests based on ISO5801 Noise tests based on ISO13347-3 Motors Type - external rotor, squirrel cage induction motor Electricity supply - 230V, single and 415V, three-phase, 50Hz Bearings - sealed-for-life, ball Speed-controllable using electronic or auto-transformer controllers Most three-phase units are fitted with 2-speed star/delta design motors See page 0-2/3 for details on these motors BACKDRAFT DAMPER LOSSES gv - Volume Flow, m3/s Refer to page J-2 for more information on this product. Wiring Diagram See page N-8, diagram ER 1, 2, 4, 5. D- 3 phase I E-1 phase \ 25, 28, 31,35, 40, 45, 50, 56 or 63 - Fan dia. in cm -Fan speed, no. of poles- Approx. Approx. weight volume kg. m3 ROOF MOUNTED FANS © FANTECH 2020

GAMMA ULTRA SERIES TECHNICAL DATA Model GUE...D/V GUD...D/V 254.** Nom. Max Speed Operating r/s Temp. oC 15 60 638. 12 60 Inlet Outlet Inlet Outlet Inlet Outlet Inlet Outlet Inlet Outlet Inlet Outlet Inlet Outlet Inlet Outlet Inlet Outlet Inlet Outlet Inlet Outlet Inlet Outlet Inlet Outlet Inlet Outlet Inlet Outlet Inlet Outlet Inlet Outlet Inlet Outlet Inlet Outlet Inlet Outlet Inlet Outlet Inlet Outlet All motors except 254 and 284 are two speed ** Available in single phase only * Amperages shown are a guide only, refer to our Sales Department for accurate figures at time of order. ROOF MOUNTED...

SUGGESTED SPECIFICATION Downflow Exhaust Series The roof ventilators shall be of the Gamma Ultra Series downflow exhaust type as designed and manufactured by Fantech Pty. Ltd. and be of the model numbers shown on the schedule/drawings. Impellers shall be made from high performance injection moulded composite material. They shall be Mixed-Flow design and driven by speed-controllable external rotor motors with integral thermal overload protection. The cowl shall be of the downflow exhaust design and formed from plastic and/or fibreglass. Steel components are corrosion protected. All performance...

Gamma Ultra Series.qxd GAMMA ULTRA SERIES Extenal Rotor 4 pole 23 r/s Extenal Rotor 6 pole 15 r/s All performance data shall be for a complete assembled unit based on ISO5801 for air flow and ISO13347-3 for noise. The roof ventilators shall be of the Gamma Ultra Series vertical exhaust type as designed and manufactured by Fantech Pty. Ltd. and be of the model numbers shown on the schedule/drawing. The windband shall be of the vertical exhaust design and formed from plastic. Steel components shall be corrosion protected. Vertical Exhaust Series Impellers shall be made from high performance injection...