MANUAL AFFECTED: TECHNICAL MANUAL EASICOOL DF ...
MANUAL AFFECTED: TECHNICAL MANUAL EASICOOL DF ...
MANUAL AFFECTED: TECHNICAL MANUAL EASICOOL DF ...
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<strong>TECHNICAL</strong> UPDATE<br />
Date: 25/07/2008 Sheet 2 of 24<br />
Indoor Unit<br />
OPTIONAL EXTRAS - ENERGY SAVING<br />
Electronically<br />
Commutated (EC) Fan<br />
Motor<br />
Sizes 6 - 60<br />
Backward curved impellers, direct drive centrifugal fan assemblies with integral<br />
rotor mounted motor which is statically and dynamically balanced for<br />
quiet operation.<br />
Designed for high corrosion resistance, the impellers are laser welded<br />
aluminium with a galvanised rotor and die cast aluminium EC power module.<br />
EC motors incorporate integrated electronics to convert AC power to DC for<br />
efficient and accurate speed control and are adjustable via the microprocessor<br />
display keypad.<br />
The fans offer maximum airflow performance while keeping sound levels to<br />
a minimum.<br />
The fans are mounted within a floorstand complete with adjustable feet, optional<br />
legs and floor tile lip. Height of the floorstand; please specify at order.<br />
EC motors are DC motors with integrated AC to DC conversion; this gives the<br />
flexibility of connecting to AC mains with the efficiency and simple speed control<br />
of a DC motor. The EC fan offers significant power reduction in comparison with<br />
equivalent AC fan at both full and modulated fan speeds. The inbuilt EC fan<br />
control module allows for fan speed modulation from 15-100%, a standard AC<br />
fans modulating range is typically 40-100% of full fan speed.<br />
The EC fan presents superior energy efficiency at full and reduced fan speed<br />
compared to the equivalent AC fan motor.<br />
Standard voltage regulated (VR) fan speed controllers offer a linear response.<br />
By comparison the EC fan is adjusted on demand via the unit microprocessor<br />
with precision, offering substantial energy savings. The following illustration<br />
shows a comparison of the typical power input required by each method.<br />
Input Power<br />
Airflow<br />
Key<br />
EC (Electronically<br />
Commutated) Fan Speed<br />
Control<br />
Voltage Regulated (VR) Fan<br />
Speed Control<br />
Energy Manager Analysis of system energy consumption can be monitored via a dedicated LCD<br />
display. Unit parameters can be adjusted via the unit microprocessor control to<br />
affect energy usage in line with the system need.<br />
CAUTION<br />
If Phase Rotation Protection and an Energy Manager unit are both<br />
required, the Energy Manager will require the addition of a Field Card,<br />
please contact Airedale.
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