Airedale SmartCool 11-233kW - Manual (Page 193)

Precision Air Conditioning SmartCool
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Precision Air Conditioning
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Installation, Maintenance and Commissioning Manual :6877419 02/2013
Optional Extras - Energy Saving
Electronically Commutated
(EC) Fan Motor Shall incorporate external EC rotor motor technology to provide highly accurate
discreet speed control. The fans offer maximum air flow performance while
keeping sound levels to a minimum.
Each fan shall incorporate electronically commutated DC motor control using
semi-conductor modules responding to a signal from the Airedale indoor unit.
EC motors are DC motors with integrated AC to DC conversion; this gives the
flexibility of connecting to AC mains with the efficiency and simple speed control
of a DC motor. The EC fan shall offer significant power reduction in comparison
with equivalent AC fan at both full and modulated fan speeds. The inbuilt EC fan
control module shall allow for fan speed modulation from 0-100%, the
modulating range of a standard AC fan is typically 40-100% of full fan speed.
Optional Extras – General
Short Case Axial Fans Short case axial fans shall be supplied for indoor installations where discharge air
requires to be ducted to an outdoor location. The fans shall meet duty plus nominal
75Pa of external static pressure.
Head pressure control shall be maintained by a modulating fan speed controller fitted
to the outdoor unit. The controller shall be rated to IP54 for outdoor use and operate
accurately in ambient temperatures down to a minimum of -20°C.
Corrosion Resistant Coated
Coils For aggressive atmospheres a corrosion resistant coating shall be applied to the
aluminium fins.
Shut Off Valves Where unit isolation for easier maintenance is required, shut off valves shall be
supplied loose for on site fitment.
Coil Guards Protective mesh guards can be fitted to each of the outer coils to protect against
damage.
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