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Description
The Gamma Ultra Series of Mixed-Flow 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. They are available in 9 sizes, extending from 250 to 630mm diameter.
Features
- Robust, lightweight construction.
- Choice of speeds available.
- Compact, low profile design.
- Designed for down flow 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.
- Robust, lightweight construction.
- Choice of speeds available.
- Compact, low profile design.
- Designed for down flow 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.
Motor
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
Testing
Air flow tests based on ISO5801
Noise tests based on ISO13347-3
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Technical Data - GUD638V| Speed [rps] | Avg. dBA @ 3m | kWatts (Input) | Amps | Max.°C | Approx. Weight [kg] |
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| 12 | 48 | 0.86 | 1.85 | 60 | 52 |
Sound Data| Type | 63 | 125 | 250 | 500 | 1K | 2K | 4K | 8K |
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| Inlet | 64 | 68 | 66 | 62 | 65 | 63 | 56 | 52 | | Outlet | 53 | 68 | 70 | 69 | 68 | 64 | 58 | 46 |
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