Unit Description Aircooled Series R HelicalRotary Liquid Chiller Model

unit description air-cooled series r helical-rotary liquid chiller model rtac 120 to 400 (400 to 1500 kw –

Unit
Description

Air-cooled Series R Helical-Rotary Liquid Chiller
Model RTAC 120 to 400
(400 to 1500 kW – 50 Hz)

RLC-PRG002-E4
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CG-PRGXXX-E4
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Chiller description
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R134a refrigerant
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Two refrigerant circuits
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Able to unload down to 15% of full load
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Semi-hermetic horizontal helical rotary compressor(s)
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One shell and tube evaporator of falling film type
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Electronic expansion valves
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One water inlet connection and one water outlet connection
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One single main power supply for all the chiller
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Microprocessor based control with user interface
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Rated and certified in accordance with Eurovent standards
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Compliant with EC requirements for machinery, electromagnetic and
Pressure Equipment Directive or with national legislations.
Construction characteristics
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Entirely painted – must withstand 500 hours minimum in a
salt-spray fog test
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Weatherproof electrical panels
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Entire coil protected for shipment and rigging
Compressor characteristics
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Semi-hermetic horizontal helical-rotary type
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Direct drive – maximum speed of screw : 3000 RPM at 50 Hz
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Two rotors in the same horizontal plane
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Suction gas-cooled motor
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Oil lubrication by refrigerant pressure differential between HP
and LP
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Continuous load control by slide valve actuated by oil pressure
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Star-delta starter
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Integrated oil filter
Evaporator characteristics
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Shell and tube – Falling film type
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Freeze protection by trace heater
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Grooved pipes water connections for Victaulic couplings
Condenser
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Aluminium slit fins mechanically bonded to copper tubes
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Circuiting including subcooling
Fans
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Fan blades in composite material
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Class F, IP55 motor
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Motor with permanently lubricated ball bearings
Refrigerant circuit
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Two refrigerant circuits - with one or two manifolded compressors
on each
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Per circuit :
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Liquid line shut-off valve
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Replaceable core filter dryer
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Electronic expansion valve
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Charging valve
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Discharge and oil line check valves
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Full operating charge of R134a refrigerant and oil
Electrical panel
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Fully mounted and wired in factory
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Weatherproof
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Full opening access doors
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Lockable through-the-door disconnect switch
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One star-delta closed transition starter per compressor fully
factory-mounted and wired
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One single main power supply for the complete chiller (power and
control)
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Primary and secondary fused control power transformer
Control system
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Microprocessor based – Proportional and Integral type
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User interface displaying full messages in clear language
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Access to all control and safety parameters through different
menus
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Ensures :
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Load control
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Fault detection
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Start-up of compressors and fans
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Diagnostic and supervision
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Takes corrective actions to prevent shutdown due to abnormal high
and low pressure and overcurrent
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Possibility of direct interconnection with a building management
system using LonTalk™ open communication protocol
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