Fan & Motor Assembly Optional Features
Larger & Next Larger Fan Motor
(AC Fan Motors Only Sizes 28 to 60)
For applications where higher static air pressures are required, a larger fan and motor assembly size can be tted to
replace the standard assembly and is available on most models.
Electronically Commutated (EC) Fan Motor
Sizes 6 - 60
Backward curved impellers, direct drive centrifugal fan assemblies with integral rotor mounted motor which is statically
and dynamically balanced for quiet operation.
Designed for high corrosion resistance, the impellers are laser welded aluminium with a galvanised rotor and die cast
aluminium EC power module.
EC motors incorporate integrated electronics to convert AC power to DC for efcient and accurate speed control and are
adjustable via the microprocessor display keypad.
The fans offer maximum airow performance while keeping sound levels to a minimum.
The fans are mounted within a oorstand complete with adjustable feet, optional legs and oor tile lip.
(models DF28 - 60 only)
EC motors are DC motors with integrated AC to DC conversion; this gives the exibility of connecting to AC mains with
the efciency and simple speed control of a DC motor. The EC fan offers signicant power reduction in comparison
with equivalent AC fan at both full and modulated fan speeds. The inbuilt EC fan control module allows for fan speed
modulation from 15-100%, a standard AC fans modulating range is typically 40 to 100% of full fan speed.
The EC fan presents superior energy efciency at full and reduced fan speed compared to the equivalent AC fan motor.
Standard voltage regulated (VR) fan speed controllers offer a linear response. By comparison the EC fan is adjusted on
demand via the unit microprocessor with precision, offering substantial energy savings.
The following illustration shows a comparison of the typical power input required by each method.
To Next Page
Loading...
