Airedale EasiCool 6kW 64kW - Manual (Page 12)

EasiCool™ Precision Air Conditioning
Head Pressure Control - Intelligent Modulation
(X Models)
The system is fitted with a voltage regulating fan speed controller which allows set point adjustment and system
monitoring via the indoor unit microprocessor controller.
A pressure transducer is fitted to the liquid line which in turn feeds back the head pressure to the microprocessor. The
condenser fan speed can then modulate via the controller to provide optimum control under varying ambient conditions.
The head pressure can be monitored via the display keypad.
Units fitted with thermostatic expansion valves (TEV) have the head pressure factory set to 26 Barg (377 psig).
Units fitted with optional electronic expansion valves (EEV) have the head pressure factory set to 22 Barg (319 psig).
The head pressure can be monitored via the display keypad.
Low Noise Feature for Condenser Fan
(X Models)
Specifically designed for night time operation as optimum low noise levels are achieved with reduced ambient
temperature and room loads, this feature is also ideal for residential and other outdoor noise critical applications.
Initiated by setting the microprocessor programmable time clock, the head pressure set point changes from the standard
26 barg (377 psig) (TEV) or 22 barg (319 psig) (optional EEV) to 34 barg (493 psig), reducing the outdoor unit fan speed
and corresponding operating sound levels.
This feature is enabled by the inclusion of an optional clock card within the microprocessor.
Head Pressure Control -Intelligent Modulation
(WX Models)
A 3 way regulating valve, electronically actuated via the microprocessor, utilises a liquid line pressure transducer to
measure and adjust head pressure. The valve will allow cooling water to flow to the condenser, to bypass the condenser,
or to allow water flow to both condenser and by-pass line in order to maintain correct refrigerant head pressure.
The head pressure can be monitored via the display keypad.
12
Introduction
EasiCool Technical Manual 7525389 V1.1.0_02_2013