FRIGO SCREW K. .... R134a ..... 186 ÷ 655 kW

MAIN FEATURES
Water cooled liquid chiller.
13 models available, for a wide selection opportunity.
Average step of 35kW.
EER up to 4,76.
ESEER up to 5,53.
Single screw compressor.
R134a Refrigerant charge.
Electronic expansion valve.
Plate type heat exchangers.
Suitable for indoor installation.

MAIN BENEFITS
High ESEER.
Availability of kit for the reduction of the noise.
Reduced footprint.
Easily of maintenance.
Eurovent Certification.
 
HEAVY DUTY APPLICATIONS
The machines are particularly suitable for installation in marine applications.

INDOOR INSTALLATION
The machines are designed for indoor installation.

ELECTRONIC EXPANSION VALVE
The electronic expansion valves are synonymous of an higher energy efficiency and stability of the system.

WORKING LIMITS IN COOLING MODE
Evaporator chilled water outlet temperature: -10÷15°C Condenser outlet water temperature: 19÷63°C
 
Colour: RAL 9002

COMPRESSOR
Twin screw semi-hermetic compressor with highly efficient screw profile and high peripheral speed, optimized for R134a refrigerant.
Integrated discharge check valve.
Flanged-on oil separator.
Integrated overpressure valve.
Replaceable cartridge type oil filter.
Oil flow switch.
Valves for oil filling and discharge.
Sight glass
Electronic protection device that includes:
Electric motor thermal protection via internal winding temperature sensors.
Phase sequence electronic relay
Sensor on refrigerant discharge for temperature monitoring,
2-pole 3-phase electric motor with Part-Winding starting from model 190 V1 up to model 270 V1 included.
2-pole 3-phase electric motor with Star / Delta starting for all other machines.
Stepless capacity control, 50÷100% for each compressor.
Crankcase heater.
Terminal box with IP54 enclosure class.
Rubber supports.

EVAPORATOR
Copper brazed plate type with cover plates, plates and connections in AISI 316 stainless steel.
Anticondensate insulation made of polyurethane.
Temperature sensors on water inlet and outlet.
From model 360 V1 up to model 660 V1 the unit is equipped with two evaporators. The parallel of the hydraulic circuit is at Customer care.
Threaded hydraulic connections or with grooved end arranged for flexible joint (the flexible joint and the adapter pipe are optional accessories).

CONDENSER
Copper brazed plate type with cover plates, plates and connections in AISI 316 stainless steel.
Anticondensate insulation made of polyurethane.
From model 360 V1 up to model 660 V1 the unit is equipped with two condensers. The parallel of the hydraulic circuit is at Customer care.
Threaded hydraulic connections or with grooved end arranged for flexible joint (the flexible joint and the adapter pipe are optional accessories).

REFRIGERANT CIRCUIT
Electronic expansion valve that allows high performance and system efficiency thanks to a timely and accurate response to changes in temperature and pressure.
Sight glass.
Filter dryer on liquid line.
Service valves on liquid line.
Service valves on gas discharge.
Safety valve on low pressure side.
Safety valve on high pressure side.
Pressure transducers with indication, control and protection functions, on low and high refrigerant pressure.
High pressure safety switch with manual reset.
Refrigerant circuit with copper tubing with anticondensate insulation of the suction line.
Plastic capillary hoses for pressure sensors connection.
R134a refrigerant charge.
 
Fuses for compressor.
Contactors for compressor (2 contactors for Part-Winding start system – 3 contactors for Star / Delta start system).
Compressor Part-Winding start system from model 190 V1 up to model 270
V1 included.
Compressor Star / Delta start system for all other machines.
Transformer for auxiliary circuit and microprocessor supply.
Panel with machine controls.
Power supply: 400/3/50.

CONTROL SYSTEM
MP.COM microprocessor system with graphic display for control and monitor of operating and alarms status. The system includes:
Voltage free contact for remote general alarm.
Main components hour-meter.
Integrated “Data logger” function for the recording of events and alarms.
Nonvolatile “Flash” memory for data storage.
Menu with protection password.

HYDRAULIC CONNECTIONS OF HEAT EXCHANGERS
Heat exchangers threaded hydraulic connections ISO 228/1 – G M, available up to a diameter of 3” included.
Pipes threaded hydraulic connections ISO 7/1 – R, available up to a diameter of 3” included.
The hydraulic connections with flange (FL) are not supplied with counter flange.
The hydraulic connections with grooved end are not supplied with flexible
joint (optional accessory).