Airedale LogiCool FreeCool 40kW - Manual (Page 13)

Chillers LOGICOOL
™
Chillers
13
Technical Manual : 6521355 V1.8.0 07/2014
Design Features & Information
DIGITAL SCROLL COMPRESSORS
Control & Monitoring The systems superheat is controlled by a dedicated microprocessor and digital
compressor performance is monitored via the AireTronix controller display.
CAUTION The digital scroll compressor is always operating at either 100% or 0% mass flow.
When inspecting the refrigerant system with gauges, this is evident by pulsing of
the system pressures. Therefore, all pressure measurements MUST be taken when
the digital scroll compressor is compressing refrigerant (solenoid de-energised).
ELECTRONICALLY
COMMUTATED (EC)
FAN MOTOR OPTION 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 offers significant 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 0-100%, a standard ac fans modulating range is typically 40-100% of full
fan speed.
The EC fan offers superior energy efficiency at full and reduced fan speed compared to
the equivalent ac fan motor.
PIPEWORK DESIGN The unit refrigeration piping has been specifically designed to ensure the absolute
minimum pressure loss. Sizing and layout of pipes is such that good oil circulation is
achieved and neither performance nor efficiency is compromised.