PYXIS CLA.....R410A....108 ÷ 876 kW

MAIN FEATURES
Air cooled liquid chiller in A class energy efficiency.
31 models available, for a wide selection opportunity.
Average step of 25kW.
EER up to 3,21.
ESEER up to 4,69.
Latest generation scroll compressors.
R410A Refrigerant charge.
Units with one, two, three or four refrigerant circuits.
Plate type or shell and tube heat exchangers.
AC Axial fans.
Electronic expansion valve.
Units with one, two, three or four air circuits.
Modular construction
Suitable for outdoor installation.

MAIN BENEFITS
Two compressors for each refrigerant circuit to reach high efficiency.
Units with one, two, three or four refrigerant circuits.
Microchannel condensing coils in aluminium.
Low refrigerant charge.
High EER and ESEER. A Class energy efficiency.
Availability of kit for the reduction and the extreme reduction of the noise.
Availability of pumping groups with low, medium, high discharge head.
Availability of total or partial heat recovery system.
Availability of EC fans with available external static pressure.
Extremely easily of maintenance.
Complete set of components dedicated to the safety of the unity.
Eurovent Certification.
 
MICROCHANNEL CONDENSING COILS
The coil weight is only 50% compared to traditional copper pipes and aluminium fins of the same capacity. The reduced air resistance of the micro-channel coils allows to drastically reduce the fans motors electric energy consumption. At the same performances conditions, the micro- channels condensers require up-to less than 75% refrigerant when compared to the traditional heat exchangers.

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

A CLASS ENERGY EFFICIENCY
The best and most accurate components applied to the chillers.

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

 
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
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.
Rubber supports.

EVAPORATOR
Up to model 430 P4 D VT4 included:
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, factory assembled, for machines size “W”.
Water flow switch for water flow control, not installed but supplied in kit, for machine size “VT”.
Hydraulic connections with grooved end. Flexible joint not supplied (optional accessory).
Antifreeze heater for machine size.

From model 455 P6 T VT5 included:
Shell and tube evaporator optimized for R410A refrigerant.
Tubes with a helical rifled internal surface.
Intermediate baffles positioned to ensure optimum speed of the fluid and low pressure drops.
Refrigerant/Hydraulic circuit: o Water side:
Single circuit o Refrigerant side
Three circuits from 455 P6 T VT5 model to 646 P6 T VT6 model, both included (T version)
Four circuits for the remaining models (Q version)
Shell, header, tube sheets, made of carbon steel, tubes in Cu.
Anticondensate insulation made of polyurethane.
Temperature sensors on water inlet and outlet.
Water flow switch for water flow control, not installed but supplied in kit.
Hydraulic connections with grooved end. Flexible joint not supplied (optional accessory).
Antifreeze heater.

CONDENSING COIL
Microchannel condensing coil in aluminium and they are perfectly suitable for the civil and industrial applications cooling, while the protection function of the oxide layer allows an optimum resistance to corrosion also in case of aggressive ambient conditions.
Extremely light construction. The coil weight is only 50% compared to traditional copper pipes and aluminium fins of the same capacity.
Low air side pressure drop and consequentially drastic reduction of the fans
motors electric energy consumption.
High heat exchange efficiency.
Reduced internal volume capable of reducing the total refrigerant charge. At the same performances conditions, the micro-channels condensers require up-to less than 75% refrigerant when compared to the traditional heat exchangers.
Frame in painted galvanized steel.
 

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

REFRIGERANT CIRCUIT
Components for each refrigerant circuit:
Electronic expansion valve. The valve 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 and gas discharge.
Safety valve on high and 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

ELECTRICAL PANEL
In accordance with EN60204-1 norms, suitable for outdoor installation, complete with:
Main switch with door lock safety.
Fuses for compressors.
Magnetothermic switch for each fan and water pump (if scheduled).
Contactors for each load.
Transformer for auxiliary circuit and microprocessor supply.
Panel with machine controls.
Power supply:
400/3/50+N for machine size “WL e WH”;
400/3/50 for machine size “VT”.

CONTROL SYSTEM
MP.COM microprocessor system with graphic symbol 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 not supplied with counter flange.
The hydraulic connections with grooved end are not supplied with flexible joint (optional accessory).