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Bitzer 4CES-6Y-20D ECOLINE Semi-hermetic Reciprocating Compressor

The Bitzer 4CES-6Y-20D is a premier ECOLINE series semi-hermetic reciprocating compressor engineered for high-efficiency commercial refrigeration and air conditioning. Combining robust German engineering with versatile refrigerant compatibility, this 6 HP compressor is the ideal choice for cold rooms, blast freezers, and industrial chilling systems.
1. Technical Specifications 
Parameter Specification Details 
Brand & SeriesBITZER ECOLINE Series
Compressor Model4CES-6Y-20D (Motor Version 2)
Nominal Motor Power6 HP / 4.4 kW
Number of Cylinders4
Displacement @ 50Hz (1450 RPM)32.48 m³/h
Displacement @ 60Hz (1750 RPM)39.20 m³/h
Voltage Options (3 Phase)220V-240V D / 380V-420V Y (50Hz)
Compatible RefrigerantsR404A, R134a, R407F, R448A, R449A, R507A
Standard Oil Charge2.0 dm³ / BSE32 (POE Oil)
Net Weight91 kg
Pipe ConnectionsSuction: 28 mm (1 1/8") / Discharge: 22 mm (7/8")
2. Cooling Capacity Performance 
Refrigerant Evaporating Temp Condensing Temp Cooling Capacity Power Input 
R404A-10 °C45 °C16.72 kW7.51 kW
R404A-25 °C45 °C9.15 kW5.92 kW
R134a-10 °C45 °C10.23 kW4.10 kW


Module 1: General & Mechanical Data
Technical ParameterSpecification Details
Brand / ManufacturerBITZER (Germany)
Series DesignationECOLINE Series
Model Code4CES-6Y-20D (Motor Version 2)
Number of Cylinders4 (Four-cylinder design)
Bore x Stroke55 mm x 39.3 mm
Displacement @ 50 Hz (1450 RPM)32.48 m³/h
Displacement @ 60 Hz (1750 RPM)39.20 m³/h
Net Weight91.0 kg
Gross Weight (with packaging)96.5 kg
Module 2: Electrical & Motor Data
Electrical FeatureSpecification Details
Nominal Motor Power6.0 HP / 4.4 kW
Power Supply (50 Hz)220V - 240V Delta / 380V - 420V Star (3 Phase)
Power Supply (60 Hz)265V - 290V Delta / 440V - 480V Star (3 Phase)
Max. Operating Current30.8 A (at 230V) / 17.7 A (at 400V)
Locked Rotor Current (LRA)142.0 A (at 230V) / 82.0 A (at 400V)
Motor Protection ModuleSE-B1 (Standard built-in)
Enclosure Protection ClassIP66 (Dustproof & Waterproof)
Module 3: Connection & Refrigeration Data
Operational FeatureSpecification Details
Suction Line Connection (SL)Size: 28 mm (1 1/8") ODS
Discharge Line Connection (DL)Size: 22 mm (7/8") ODS
Oil Charge Amount2.0 dm³ (Liters)
Standard Lubricant TypeBSE32 (Polyolester / POE Oil)
Compatible RefrigerantsHFC / HFO (R404A, R134a, R407F, R448A, R449A, R507A)
Max. Allowable Pressure (LP/HP)19 bar / 32 bar
Module 4: Performance Chart (Standard Cooling Capacity)
RefrigerantEvaporating TempCondensing TempCooling CapacityPower Input
R404A-10 °C45 °C16.72 kW7.51 kW
R404A-25 °C45 °C9.15 kW5.92 kW
R134a-10 °C45 °C10.23 kW4.10 kW
R134a5 °C50 °C16.34 kW4.96 kW
Module 5: Scope of Delivery & Options
Component StatusItem Description
Standard DeliverySuction & Discharge Shut-off Valves, Oil Sight Glass, Protective Nitrogen Charge, Vibration Dampers Kit.
Optional AccessoriesCrankcase Heater (0..120 W PTC), CRII Capacity Control (100%-50%), Discharge Gas Temp Sensor, Oil Level Switch (OLC-K1), Additional Fan.

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