REVERSO SCREW........201 ÷ 1098 kW

MAIN FEATURES
Reversible heat pump.
15 size available, for a wide selection opportunity.
Average step of 60kW.
EER up to 3,00.
COP up to 3,61.
ESEER up to 3,42.
Twin-screw compressors.
R134a refrigerant charge.
Double refrigerant circuit.
Shell and tube heat exchangers.
AC Axial fans.
Double refrigerant circuit.
Suitable for outdoor installation.
 
IDEA® DEFROSTING SYSTEM
“Patented” defrosting system with dynamic reading of working
parameters. Thanks to proprietary software it senses the real
presence of brine on the coil starting defrosting cycles only in that situation. This brings a remarkable energy saving (more than 20-
30% on the average) and a higher working continuity compared with
traditional systems.

WORKING LIMITS IN COOLING MODE
Chilled water outlet temperature: -10÷15°C Ambient temperature: -20÷50°C

WORKING LIMIT IN HEATING MODE (HEAT PUMP)
Hot water outlet temperature: 20÷63°C
Ambient temperature: -10÷20°C
 

MAIN BENEFITS
Units with separated air circuits to grant the continuity of the working mode during the coils defrosting.
Defrosting dynamics control system IDEA®.
Electronic expansion valve.
High COP.
Availability of kit for the reduction and the extreme reduction of the noise.
Availability of pumping groups.
Easily of maintenance.
Components dedicated to the safety of the unity.
 

 
MAIN COMPONENTS
FRAMEWORK
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
Twin screw semi-hermetic compressors with highly efficient screw profile and high peripheral speed, optimized for R134a refrigerant.
Integrated discharge check valve.
Flanged-on oil separator.
Integrated safety relief valve (overpressure inner valve).
Replaceable cartridge oil filter.
Oil flow switch.
Valves for oil filling and discharge.
Oil 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 200 V2 U04 to model 280 V2 U06 included.
2 capacity steps 0-50-100% for each compressor, from model 200 V2 U04 to model 280 V2 U06 included.
2-pole 3-phase electric motor with Star / Delta starting from model 340 V2 U08 to model 1090 V2 14 included.
Stepless capacity control, 50÷100% for each compressor from model 340 V2 U08 to model 1090 V2 14 included.
Crankcase heater.
Terminal box with IP54 enclosure class.
Rubber supports.

PLANT GAS/WATER HEAT EXCHANGER
Single pass type shell and tube evaporator, optimized for R134a refrigerant.
Tubes with a helical rifled internal surface.
Intermediate baffles positioned to ensure optimum speed of the fluid and low pressure drops.
Single circuit on water side and independent circuits, one for each compressor, on refrigerant side.
Shell, header, tube sheets, made of carbon steel, tubes in Cu.
Anticondensate insulation made of polyurethane.
Temperature sensors on water inlet and outlet.
Antifreeze heater.
Hydraulic connections with grooved end arranged for flexible joint (the
 

REFRIGERANT CIRCUIT
Component for each 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.
Energy reserve module for the electronic expansion valve to allow the closure of the valve in the event of lack of power supply.
Reversing valve for refrigeration cycle inversion.
Sight glass.
Filter dryer on liquid line.
Solenoid valves on liquid lines.
Liquid receiver.
Service valves on liquid line.
Service valves on compressor gas discharge.
Double safety valve (only one in function) on high and low pressure side. The system include two safety valves with manual changeover system.
Pressure transducers with indication, control and protection functions, on low and high refrigerant pressure and oil pressure.
High pressure safety switch with manual reset.
Pressure gauge on high and low pressure.
Check valves.
Liquid separator on compressor suction line.
IDEA® defrosting system.
RC Group patented defrosting system based on a dynamic reading of  the evaporating parameters. Through sensors the microprocessor realize the real ice presence on the gas/air heat exchanger and activates the

ELECTRICAL PANEL
In accordance with EN60204-1 norms, suitable for outdoor installation, complete with:
Main switch with door lock safety.
Fuses for each compressor.
Magnetothermic switches for fans.
Fuses for water pumps (if scheduled).
Contactors for each load.
Compressor Part-Winding starting system from model 200 V2 U04 to model 280 V2 U06 included.
Compressor Star / Delta starting system from model 340 V2 U08 to model 1090 V2 14 included.
Transformer for auxiliary circuit and microprocessor supply.
Panel with machine controls.
Summer / Winter working mode selector.
Power supply 400/3/50.
 
flexible joint and the adapter pipe are optional accessories).    CONTROL SYSTEM
MP.COM microprocessor system with graphic display for control and
 
EXHAUSTION GAS/AIR HEAT EXCHANGER
Heat exchanger coil with 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.
Frame in galvanized steel.
Sub-cooling circuit to allow a significant increase in cooling capacity. The
circuit is active only when the heat exchanger operates as an air cooled condenser.
Ambient air temperature sensor.

FANS SECTION
Axial fans with sickle-shaped blades, fan guard and optimized for low noise levels.
External rotor electric motor, AC type with stepless variable speed for condensing pressure control.
IP54 enclosure class.
 
monitor of operating and alarms status. The system includes:
Voltage free contact for remote general alarm.
Main components hour-meter.
Clock card for alarms date and time displaying and storing.
Nonvolatile “Flash” memory for data storage.
Menu with protection password.
LAN connection.

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 (optional accessory).
The hydraulic connections with grooved end are not supplied with flexible joint (optional accessory).