Gamma Downflow Series – CD456D
Performance Curve - CD456D
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. They are available in 12 sizes, extending from
192 to 710mm diameter.
Features Robust, lightweight construction.
Choice of speeds available.
Compact, low profile design.
Designed for down flow 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.
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 (except CE316)
Most three-phase units are fitted with 2-speed star/delta design motors
Internal Protection
Thermal protection is supplied as standard on all motors.
Testing
Air flow tests to ISO5801:2007
Noise tests to BS848:Part 2, 1985
Suggested Specification
The Gamma Series of centrifugal roof ventilators shall be the downflow exhaust type as designed and manufactured by Fantech Pty. Ltd.
Impellers shall be backward-curved centrifugal design and driven by
speed-controllable external rotor
motors with integral thermal protection.
The cowl shall be of the downflow exhaust design and formed from plastic and/or fibreglass. Steel components are corrosion protected.
All models shall be fully tested as a complete assembled unit to ISO5801:2007 for air flow and BS848:Part 2, 1985 for noise.Technical Data - CD456D
| Speed [rps] | Avg. dBA @ 3m | kWatts (Input) | Amps | Max.°C | Approx. Weight [kg] |
|---|
| 15 | 46 | 0.44 | 1.2 | 0 | 38 |
Sound Data
| Type | 63 | 125 | 250 | 500 | 1K | 2K | 4K | 8K |
|---|
| Inlet | 77 | 76 | 67 | 64 | 59 | 57 | 55 | 51 |
Dimensions
| A | B | C | D | E | F | G |
|---|
| 620 | 720 | 75 | 908 | 890 | 530 | 540 |
*All dimensions in mm, unless otherwise stated
Wiring Diagram
Diagram shown is for single-speed only.
For 2-speed and special motors, contact Fantech for details.
Ancillaries
