EC Motor
Sizes 6 - 26
(Direct Drive)
Units utilise a double inlet, forward curved, direct drive centrifugal fan with integral shaft mounted EC motor which is
statically and dynamically balanced for quiet operation. Impellers and casings are galvanised for protection against
corrosion. The integral motor runs in sealed for life, lubricated bearings and features automatic thermal overload
protection.
Fan speed, airow and external static pressure are controlled by the use of a 0-10 Volts signal via the microprocessor
display keypad which offers easy on site adjustment.
Adjustable by increments of 1% within + / - 10% of the set point.
Sizes 6 - 17
Units have a single fan and motor assembly.
Sizes 20 - 26
Units have 2 fan and motor assemblies.
Sizes 28 - 60
(Belt & Pulley) Double inlet forward curved centrifugal fan(s) with galvanised impellers and casing.
Mild steel fan shaft with lifetime lubricated ball bearings.
Fan and drive assembly design is based on a minimum of 25,000 hours life expectancy.
Each fan assembly is separately driven by a high efciency air cooled AC motor through a pulley and ‘V’ belt drive. The
complete motor assembly is mounted on a fully adjustable platform for belt tensioning. Motor specication conforms to
Efciency Class 1(IE2).
With integrated plummer block bearings (4kW motors only).
Sizes 28 - 45
Units have a single fan and motor assembly.
Sizes 50 - 60
Units have 2 fan and motor assemblies.
Large AC fan motor options available on most sizes, refer to Mechanical Data.
Energy efcient Electronically Commutated (EC) fans are also available.
Airow Switch
An adjustable differential pressure switch activates a visual alarm at the status panel and breaks the power supply in the
event of a fan or motor failure.
Filters
Pleated disposable panel lters in a rigid frame. Conform to BS EN 779-G4.
Access and removal from unit front.
As standard the microprocessor provides an alarm following a preset run time limit being exceeded.
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