AIREDALE DeltaChill - Condenser Fans; Condenser Fan and Motor - AC; Energy Saving Electronically Commutated (EC) Fan Motor; High Airflow EC Fans

Chillers
Introduction
DeltaChill™ Air Cooled and FreeCool
20
Chiller Technical Manual 7267818 V1.13.0_01_2018
Condenser Fan and Motor - AC
Axial fan assemblies with nger proof grille and incorporating external rotor AC motor technology, capable of highly
accurate discreet speed control., Discharges air vertically. The fans offer maximum performance whilst keeping sound
levels to a minimum.
Condenser Fans
High Airow EC Fans
Additional free cooling is available when a high air volume EC Fan is selected.
This option is only available with the Free cool chiller.
Energy saving Electronically Commutated (EC) Fan
Motor
Each 800 mm diameter fan incorporates on board electronics
with AC / DC Conversion and inverter driven DC motor
control to offer unparalleled high efciency levels combined
with smooth step-less speed control and quiet operation.
Sickle blades reduce air turbulence to minimise sound levels
and power consumption whilst maximising performance.
The long bell mouth design provides improved
aerodynamics, up to 10% more air movement, and an extended vertical throw of air to reduce the chance of air re-
circulation. As standard the enclosure is complete with an integral nger proof grille.
The fans offer maximum airow performance while keeping sound levels to a minimum.
A mains EMC lter is tted when the EC fan option is selected with the unit. The lter is design for convenient mains
connection within the bus bar chamber.
The in built EC fan control module allows for fan speed modulation from 15-100%, a standard AC fans modulating range
is typically 40-100% of full fan speed.
The EC fan presents superior energy efciency at full and reduced fan speed compared to the equivalent AC fan motor,
offering efciency savings anywhere between 30 to 100% compared with an AC fan.
Fan speeds are factory set depending on sound level variant.
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.
Fan speed of 60%
Voltage regulated input power required 60%
EC input power required 18%
EC (Electronically Commutated) Fan Speed Control
Voltage Regulated Fan Speed Control
0
20
40
60
80
100
120
0
20
40
60
80
100
120
Fan Speed %
Input Power %