MULTIPLO SCREW .....190,0 ÷ 1153,0 kW

MAIN FEATURES
Multifunction chiller
15 models available, for a wide selection opportunity..
Average step of 60kW.
EER up to
COP up to
ESEER up to
Twin-screw compressors.
Double refrigerant circuit.
R134a refrigerant charge.
Shell and tube heat exchangers.
AC axial fans.
Double air circuit.
Electronic expansion valves.
Suitable for indoor 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
Evaporator chilled water outlet temperature: -10÷15°C Ambient temperature: -20÷50°C

WORKING LIMITS IN HEATING MODE
Condenser hot water outlet temperature: 20÷63°C Ambient temperature: -10÷20°C
 

MAIN BENEFITS
Defrosting dynamics control system IDEA®.
Availability of pumping groups.
Availability of partial heat recovery system.
Availability of kit for the reduction of the noise.
Availability of EC fans for a higher efficiency.
Easily of maintenance.

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

 
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.
Compressors compartment.
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 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 200 V2 U04 up to model 530 V2 U08 included.
2-pole 3-phase electric motor with Star / Delta starting from model 580 V2
U10 up to model 1070 V2 U14.
Steps capacity control, 0-50-100% for each compressor.
Crankcase heater.
Terminal box with IP54 enclosure class.
Rubber supports.

EVAPORATOR (for chilled water production) From model 200 V2 U04 up to model 280 V2 U06
Copper brazed plate type with cover plates, plates and connections in AISI 316 stainless steel.
Single circuit on water side and independent circuits, one for each
compressor, on refrigerant side.
Anticondensate insulation made of polyurethane.
Temperature sensors on water inlet and outlet.
Antifreeze heater.

From model 330 V2 U08 up to model 1070 V2 U14
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.

GAS/AIR HEAT EXCHANGER (heat exchanger for exhaustion)
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.
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.
Frame in galvanized steel.
 

CONDENSER (for hot water production)
From model 200 V2 U04 up to model 280 V2 U06
Copper brazed plate type with cover plates, plates and connections in AISI 316 stainless steel.
Single circuit on water side and independent circuits, one for each
compressor, on refrigerant side.
Anticondensate insulation made of polyurethane.
Temperature sensors on water inlet and outlet.
Antifreeze heater.

From model 330 V2 U08 up to model 1070 V2 U14
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.

FANS SECTION
Axial fans with sickle-shaped blades, fan guard and optimized for low noise levels.
AC type electric motor with external rotor and stepless variable speed for condensing pressure control.
IP54 enclosure class.

REFRIGERANT CIRCUIT
Component for each refrigerant circuit:
Electronic expansion valve (one valve for each heat exchanger) that allows high performance and system efficiency thanks to a timely and accurate response to changes in temperature and pressure. The expansion valve is equipped with energy reserve 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.
Service valves.
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.
Check valves.
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 defrosting cycle only when necessary, with consequent energy saving.
Refrigerant circuit with copper tubing with anticondensate insulation of the
suction line.
Plastic capillary hoses for pressure sensors connection.
R134a refrigerant charge.
ELECTRICAL PANEL
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.
Compressor Part-Winding start system from model 200 V2 U04 up to model 530 V2 U08 included.
Compressor Star / Delta start system from model 580 V2 U10 up to model 1070 V2 U14.
Transformer for auxiliary circuit and microprocessor supply.
Ambient temperature sensor.
Panel with machine controls.
Power supply 400/3/50.
 
MULTIPLO SCREW can produce chilled water or hot water with variable loads up to 25% of the nominal.
With request of simultaneous production of hot water and chilled water,
the two compressors can partialize their operation so as to obtain different working conditions as per following table.

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 heat exchangers’ threaded hydraulic connections are available up to a diameter of 3 “ included, and correspond to ISO 228/1 – G M.
The pipes’ 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 supplied as standard with counter flange.
The hydraulic connections with grooved end are supplied as standard with flexible joint and adapter pipe.