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 Features
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- The MDB Series of duct mounted centrifugal fans is suitable for supply or exhaust from applications ranging from residential, through commercial, to industrial.
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 Construction
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- Aluminium extruded tubular frame incorporating 4 removable pre-galvanised panels for multi-directional airflow.
- Acoustically lined inner skin for optimum noise reduction.
- Backward curved centrifugal impellers.
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 Motors
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- Type - direct-driven external rotor.
- Electricity supply - single or three-phase to suit a wide range of voltages and frequencies.
- Bearings - sealed-for-life ball.
- External rotor motors are fully speed-controllable using electronic or auto-transformer controllers.
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Internal Thermal Protection
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- Manual - reset type are fitted as standard to external rotor motors.
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Testing
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- Air flow tests to BS848 : Part 1, 1980 and AMCA 210-85.
- Noise data tests to BS848 : Part 2, 1985.
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Special Features
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- Most three-phase external rotor motors are 2-speed star/delta design.
- Fan units are light in weight and can be mounted at any angle.
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 Dimensions
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Diminsions, mm |
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| Model MDB |
A |
B |
Kg |
| 350 |
500 |
500 |
30 |
| 400 |
670 |
670 |
36 |
| 450 |
670 |
670 |
50 |
| 500 |
670 |
670 |
58 |
| 560 |
800 |
800 |
80 |
| 630 |
800 |
800 |
105 |
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 Suggested Specifications
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- The MDB Centrifugal Fans shall be as designed and manufactured by Elta SA and be of the model numbers shown on the schedule/drawings.
- The backward-curved centrifugal impellers shall be driven by external rotor motors.
- All models shall be fully tested to BS848 : Part 1, 1980 for air flow and BS848:Part 2, 1985 for noise
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 Technical Data
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 Performance
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Note
Performance curves shown are based on nominal speeds. As motor speeds may vary from one manufacturer to another and from one motor type to anaother, it is possible actual fan speeds may differ and, thereby, the performance of the fan.
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 Ancillaries
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 Auto Cad
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Pdf
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