168 / 416
GAMMA SERIES
ROOF MOUNTED FANS
D
© FANTECH
2016
D-22
Refer to page
J-2
for more information on this product.
BACKDRAFT DAMPER LOSSES
HOW TO ORDER
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.
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
O
Robust, lightweight construction.
O
Choice of speeds available.
O
Compact, low profile design.
O
Designed for down flow or vertical discharge applications.
O
Twin vertical discharge fan also available. Provides 100%
standby capacity.
O
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.
O
Can be mounted at angle up to 30°.
O
Most 3-phase motors are 2-speed star/delta design.
O
Supply air units can be supplied, see pages
D-32/33
for
selection data.
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
See page
O-2/3
for details on these 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
Wiring Diagram
See page
N-8
, diagram
ER 1, 2, 4, 5.