Description:
The Gamma Series of centrifugal roof units has been 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. 

Features:

• Robust, lightweight construction.
• Choice of speeds available.
• Compact, low profile design.
• Designed for vertical exhaust applications.
• Twin vertical discharge fan also available. Provides 100% standby capacity.
• Shutters are standard on twin fan units and 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.
• Supply air units can be supplied

Construction

• Cowls are UV-stabilised plastic.
• Impellers are backward-curved centrifugal design and can be plastic, steel or aluminium.
• Steel components have a corrosion resistant finish.
• Bird-mesh guards are fitted as standard to both downflow and vertical exhaust models.

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 (except CE316)
• Most three-phase units are fitted with 2-speed star/delta design motors

Internal Thermal Protection

• Thermal protection is supplied as standard on all motors.

Testing

• Air flow tests to ISO5801:2007
• Noise tests to BS848:Part 2, 1985

Technical Data:

• m3/h: 2311
• L/sec: 642
• Nom. Speed r/s: 23
• Inlet: Yes
• Average dB(A) at 3m (Low Air Flow): 52
• Average dB(A) at 3m (High Air Flow): 51
• CE.. 1ph (kW): 0.28kW
• CE.. 1ph (Amps*): 1.25Amps
• CE.. 3ph (kW): 0.19kW
• CE.. 3ph (Amps*): 0.51Amps

Dimensions:

• A: 400mm
• B: 500mm
• C: 75mm
• D: ø640mm
• E: 417mm

Accessories:

• Run-on Timers & Speed Controllers
• A range of upstands are available. 

*Includes high performance backward curved centrifugal impeller
*Amperages shown are a guide only, refer to our Sales Department for accurate figures at time of order