Airedale TurboChill FreeCool 200kW - 1830kW - Manual (Page 31)

31 Chiller Technical Manual 7525355 V1.1.0_04_2013
Introduction
Chillers TurboChill™ Air Cooled and FreeCool
Unit Remote ON/OFF
Disables / Enables the unit remotely.
Compressor Anti Cycle Control
Automatic via the Microprocessor.
Compressor Load Limit
This feature limits the condensing pressure to 15 Barg by unloading the compressor.
Suction Pressure Limiting
Limits the evaporating pressure by unloading at the minimum pressure set-point, which is, adjustable depending on
system glycol content.
Supply Temperature Limiting
Based upon the freezing point of the water/ glycol solution, the unit operation is limited to a 2°C differential. Cooling is
reduced as the temperature approaches the freezing point (below this differential).
Pump(s) Remote ON/OFF
Disables / Enables the pump(s) remotely.
Evaporator Differential Pressure Sensor
Shall facilitate low flow limiting and pressure drop monitoring via the microprocessor.
Remote Setback Temperature Set-point Switch
A setback set-point for supply water temperature shall be selected to suit summer / winter conditions or night setback.
Remote Set-point Adjust
Shall allow the chilled water set-point to be adjusted via an external 0-10V signal.
Compressor Hours Run
Displays hours run of each compressor.
Interactive Head Pressure Setpoint Management
The combination of variable speed compressor, EC fan and interactive control logic allows fans to be slowed down to
give the optimum head pressure setpoint in relation to combined power draw of compressor and fans.
The fan speed shall automatically modulate to achieve the best energy balance for all normal operating conditions.
Reducing the head pressure setpoint decreases the compressor input power at the expense of the fan input power.
Compressor Reduced Start Delay
Compressor fast start functionality shall be avaliable for application that require minimum downtime following 3 phase
power failure. This is subject to a compressor UPS being fitted onto the L4 permanent supply. Please contact Airedale.
Password Protection
The control system integrity shall be maintained by restricting access with a password PIN number.
IMPORTANT:
To change the PIN number; please contact Airedale at time of order with the preferred 4 digit number.