UNICO...... R410A ..... 20 ÷ 260 kW

MAIN FEATURES
Air cooled liquid chiller.
29 models available, for a wide selection opportunity.
Average step of 10kW.
EER up to 3,22.
ESEER up to 4,18.
Scroll compressors.
R410A Refrigerant charge.
Single or double refrigerant circuit.
Plate type heat exchangers.
EC Axial fans.
Single air circuit.
Suitable for outdoor installation.
 
FANS WITH BRUSHLESS TYPE EC MOTOR
The fans electric motors are the brushless type with built-in electronic commutation system (EC) which yield high energy savings during operation in reduced air flow.
These electric motors are ensuring high performances, minimum energy
consumption and total absence of electromagnetic noise

WORKING LIMITS IN COOLING MODE
Chilled water outlet temperature: -12÷20°C Ambient temperature: -10÷45°C
 

MAIN BENEFITS
Units with two scroll compressors for each refrigerant circuit to reach a high efficiency.
Units with one or two refrigerant circuits.
High EER and ESEER.
Availability of kit for the reduction and the extreme reduction of the noise.
Availability of pumping groups.
Availability of total or partial heat recovery system.
EC Axial fans for a high efficiency.
Easily of maintenance.
Components dedicated to the safety of the unity.
Eurovent Certification.
 
Base, self supporting frame and paneling in steel plate with protective surfaces treatment in compliance with UNI ISO 9227/ASTMB117 and ISO 7253, and painted with epoxy powders.
Colour: RAL 9002

COMPRESSORS
Orbiting spiral (SCROLL) hermetic compressors with spiral profile optimized for R410A refrigerant.
ON / OFF capacity control (0 / 100% each compressor).
2-pole 3-phase electric motor with direct on line starting.
Phase sequence electronic relay.
Crankcase heater.
Electric motor thermal protection via internal winding temperature sensors.
Terminal box with IP54 enclosure class.
Rubber supports.

EVAPORATOR
Copper brazed plate type with cover plates, plates and connections in AISI 316 stainless steel:
With single refrigerant circuit for S version machines.
With double refrigerant circuit for D version machines.
Anticondensate insulation made of polyurethane.
Temperature sensors on water inlet and outlet.
Differential water pressure switch for water flow control.
Antifreeze heater.

CONDENSING COIL
Heat exchanger coil with internally corrugated copper tubes and high efficiency aluminium fins, specifically developed to provide high heat transfer and lower pressure drops. The combination of two factors, special tubes and fins, allow to optimally combine the following aspects:
Maximum capacity relative to the size of the exchanger.
Minimum charge of refrigerant.
Reduction of the air flow required for the heat exchange.
Sub-cooling circuit to allow a significant increase in cooling capacity.
Frame in galvanized steel.

FANS SECTION
Axial fans with sickle-shaped blades, fan guard and optimized for low noise levels.
Brushless type synchronous EC motor with integrated electronic commutated system and continuous variation of the rotation speed. The motor rotation control is obtained with the EC system (Electronic
Commutation) that manage the motor according to the 0÷10V proportional
signal coming from the microprocessor control.
Maintenance-free bearings
IP54 enclosure class.

REFRIGERANT CIRCUIT
Components for each refrigerant circuit:
Thermostatic expansion valve.
Electronic expansion valve for models 197 P2 S and 230 P3 S.
The valve allows high performance and system efficiency thanks to a
timely and accurate response to changes in temperature and pressure. The electronic expansion valve exclude the installation of the electromagnetic valve on liquid line.
Sight glass.
Electromagnetic valve on liquid line. The electromagnetic valve is not installed when the electronic expansion valve is present.
Filter dryer on liquid line.
Service valves on liquid line and gas discharge.
Safety valve on low 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.
R410A refrigerant charge.
 
In accordance with EN60204-1 norms, suitable for outdoor installation, complete with:
Main switch with door lock safety.
Magnetothermic switch or fuses for each compressor.
Magnetothermic switches for fans or water pumps (if scheduled).
Contactors for each load.
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.
Nonvolatile “Flash” memory for data storage.
Menu with protection password.
LAN connection.

HYDRAULIC CONNECTIONS OF HEAT EXCHANGERS
The threaded hydraulic connections are available up to a diameter of 3 “ included, and correspond to ISO 7/1 - R.
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).