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2-step semi-hermetic reciprocating piston compressor 4 to 44 kW 2nd generation
With its 2nd generation 2-step compressors, BITZER is setting new standards in technology and performance for enhanced low temperature applications.
This series is the result of intensive research based upon many years of experience in the construction of exceptionally economical and solid reciprocating piston compressors.
With regard to the changing requirements for using alternative refrigerants, many aspects of these compressors have been further developed and specially optimised for operation with HFCs R404A and R507A.
The experience gained from parts that have been tried and tested of many years was drawn upon in order to offer an exceptionally robust design for a wide range of applications.
The gas flow and service valves have been specially tuned for low temperature operation. In combination with a 2nd generation driving mechanism and motor designed to be as effective as possible, an even better cost effectiveness compared to conventional low temperature systems has been achieved.
Just one model series for chlorine-free HFC refrigerants and CFCs.
Changing over to HFC refrigerants:
• Use a polyolester oil approved by BITZER
• "Y" suffix in the type designation
• Adjust expansion value for intermediate cooling to the HFC refrigerant
Stable valve plate construction: Valves made of impact-resistant valve spring steel
Quiet and low-vibration: 4- and 6-cylinder design with optimised mass balancing
Pressurized oil lubrication: by means of a reversible gear pump
Electrical junction box IP54: Optional IP66
Electronic motor protection: Thermal Monitoring with PTC Sensors
Integrated differential pressure relief valve
Refrigerant injection for intercooling:
• Either with mechanical expansion valve
• or especially for R22 operation with electronically controlled CIC system
Refrigerant subcooler mounted
• Motor protection device with additional functions (INT389)
• Oil sump heating
• Oil differential pressure switch
• Length: 545 mm
• Width: 523 mm
• Height: 790 mm
• Number of Cylinders: 6 pcs
• Type: Halbhermetisch
• Refrigerant: R404A, R507A, R448A/R449A
• Compression Type: Hubkolben
• Starting current (Locked Rotor): 81,0 / 132,0 A
• Supply Voltage: 400/3/50 V/Ph/Hz
• Max. Operating Current: 31,0 A
• Max. Power Consumption: 18.1 Kw
• Flow Volume: 63,50 m3/h HD 31,80 m3/hh
• MD Motor (Nominal): 15 hp (11 kW)
• Discharge Line: 35.0 mm (13/8 inch)
• Suction Line: 42.0 mm (1 5/8 )
• Oil Charge: BSE32
• Option: BSE55 bei R134a, tc > 70oC
• Oil Quantity: 4.75 l
Note 1: The rated power is not identical to the max. motor power. Observe the max. operation current / max. power input when selecting contactors, leads and fuses (�electrical data�). Contactors: Category AC3LP low-pressure stageHP high-pressure stage
Note 2: Motor for part winding, Y/? design as well as other voltages and currents upon request
Note 3: Data for compressors with voltage range 380 .. 420 V (220 .. 240V) based on average value of 400 V (230 V).Conversion factors:380 V (220 V) 0.95420 V (240 V) 1.05
Accessory 1: Control valve for power controller
Accessory 2: Crankcase heater, Beer level regulator
Accessory 3: Liquid Subcooler IQ-Modul, Pressure transducer
Accessory 4: IQ-Modul, Pressure transducer
Accessory 5: Motor protection Pressurised gas temperature sensor
Accessory 6: Oil pressure safety switch, Refrigerator oil
Accessory 7: Option: Refrigerator oil BSE55 with R134a, tc > 70 oC
