Bitzer Semi-Hermetic Compressor 4NES-20Y - 4NES20Y

Bitzer Semi-Hermetic Compressor 4NES-20Y

Part Number: 4NES20Y

Bitzer Semi-Hermetic Compressor 4NES-20Y

Part Number: 4NES20Y
Bitzer

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  • BITZER ECOLINE SEMI HERMETIC COMPRESSOR SERIES

     

    The new BITZER ECOLINE series offers highly efficient all-purpose compressors which meet the challenging demands of modern refrigeration systems. 

    The ECOLINE series has now been extended to all models and the optimisation package has been developed further for universal use with different refrigerants – at the same time extending the operating ranges. 

    The refrigerants include: R134a, R404A, R407A, R407C, R407F, R513A, R22, R449A, R507A, R450A, R1234yf, R1234ze.

    The compressors are already designed for operation with "Low-GWP" HFO refrigerants and HFO-/HFC blends.   

    The coefficient of performance (COP) of the new ECOLINE models has been improved by an average of 6% up to a maximum of 12% compared with preceding series. 

    This is not achieved with a single component, but by optimising the valve plates, reducing flow losses and discharge gas pulsation as well as specially adapted highly efficient motors with broad band characteristics. 

    Each ECOLINE is compatible with its predecessor compressor.  These predecessor compressors can be substituted without the need for modifying the system. 

    Whereas many of the major internal components have been redesigned, the outer shape has remained virtually unchanged: the same outer dimensions, unchanged mounting points, valve and sensor positions, connections for oil and gas equalisation, as well as for oil level regulators. 

    Motor version 2 covers the classic refrigeration applications – medium and low temperature refrigeration – with one single product. In many cases it can thus replace a predecessor compressor with motor version 1. 

    For supermarket applications with R134a, a version with specially adapted motor is available for the ECOLINE models CE4, BE5 and BE6 – motor version 3 – in addition to motor version 2. 

    Motor version 3 has been specially designed for the pressure levels of R134a and focuses on applications in the medium temperature refrigeration range in modern systems. 

    For compressors with motor version 3, the standard motor can be operated with a frequency inverter up to 70 Hz (for mains voltage 400V/3/50Hz). 

     

    Extended application range:

    ● R134a up to tc = 85°C 

    ● R404A and R507A up to tc = 62°C 

     

    Energy efficient high cooling capacity and minimum energy requirement: 

    ● Highly efficient working valves 

    ● Minimum clearance volume 

    ● Efficient, large-volume motor 

    ● Reduced flow losses at low condensing temperatures 

     

    Wear resistant drive gear: 

    ● Surface hardened eccentric shaft and crankshaft 

    ● Low friction bearings and aluminium pistons 

    ● Hard chrome plated piston rings 

     

    Quiet with low vibration:

    ● Optimized mass balance 

    ● Low discharge gas pulsations due to special cylinder head design 

     

    Minimum space requirement:

    ● Very compact design 

     

    Robust: 

    ● Solid valve plate design 

    ● Valves made of impact resistant spring steel 

    ● Wear resistant drive gear 

     

    Efficient capacity control: 

    ● Cylinder shut-off or VSD capacity control possible 

    ● Cylinder shut-off possible from 18 m3/h displacement (50 Hz) on   

    – 4 cylinder compressor: 50%   

    – 6 cylinder compressor: 66% / 33%   

    – 8 cylinder compressor: 75% / 50% 

    ● CRII cylinder heads allow for stepless capacity control from 100% to 10% when fitted to all cylinder banks of 4 and 6 cylinder compressors (solenoid valves, coils and CRII system controller required eg. Bitzer CM-RC-01).

    ● Tandem compressors from 22,7 m3/h to 303 m3/h (50 Hz) 

    ● Approved parallel operation 

    ● VSD capacity control from 25 to 70 Hz – subject to conditions

     

  • General Specifications
    Motor Version1
    Displacement5632 m³/Hr
    Motor SeriesCE4
    Number of Cylinders4
    Capacity Control50%
    Suction Line Connection1-5/8 "
    Discharge Line Connection1-1/8 "
    Weight150 kg
    Oil Charge2.6 L
    Oil TypeBSE-32 Ester Oil
    Electrical Specifications
    Voltage380-420 / 3 / 50 Hz
    Motor TypePWS
    Max Operating Amps33.2 amps
    Crankcase Heater0 - 120 watt 230 volt PTC Self Regulating Crankcase Heater
  • bitzer_semi_ce4

    Units Dimensions (mm)
    A658
    B303
    C385
    D367
    D1162
    E256
    F48
    G110
    H173
    J582
    K56
    L342
    1High pressure connection (HP)
    2Discharge gas temperature sensor (HP) or CIC sensor
    3Low pressure connection (LP)
    4CIC System: spray nozzle (LP)
    5Oil fill plug
    6Oil drain
    7Oil filter (magnetic screw)
    8Oil return (oil separator)
    9AGas equalisation (parallel operation)
    9BOil equalisation (parallel operation)
    10Crankcase heater
    11Oil pressure connection +
    12Oil pressure connection -
    16Connection for oil monitoring (oil sensor or differential oil pressure switch “Delta-P”)
    21Connection for oil service valve
  • R134A
    Cond Temp (°C)Evaporating Temperature (°C)
    -20-15-10-5051015
    60Capacity (w)69809450124601607020400254503145038400
    Input (w)50406000702080809130101301105011840
    70Capacity (w)5330735098201281016390206002560031400
    Input (w)48805910704082509490107301192013030
    80Capacity (w)51707100945012280156301957024150
    Input (w)5570679081309540109901243013840

    Note:

    400v / 3 / 50Hz , 20 Deg Return Gas, no Sub-Cooling
    4 cylinder models supplied with one cylinder head prepared for capacity control (standard feature)
    Require additional cooling &/or return vapour limitations.
    R404A
    Cond Temp (°C)Evaporating Temperature (°C)
    -40-35-30-25-20-15-10-505
    30Capacity (w)8100110801471019080243003040037600460005570067000
    Input (w)49905900686078308760962010380110001145011680
    40Capacity (w)635088601194015660201002540031550388004720056900
    Input (w)500060307140829094501058011640126001342014060
    50Capacity (w)47406780931012380160702045025650317003870046800
    Input (w)5020613073608670100301139012720139901516016190

    Note:

    400v / 3 / 50Hz , 20 Deg Return Gas, no Sub-Cooling
    4 cylinder models supplied with one cylinder head prepared for capacity control (standard feature)
    Require additional cooling &/or return vapour limitations.
    R507
    Cond Temp (°C)Evaporating Temperature (°C)
    -40-35-30-25-20-15-10-505
    30Capacity (w)8100110801471019080243003040037600460005570067000
    Input (w)49905900686078308760962010380110001145011680
    40Capacity (w)635088601194015660201002540031550388004720056900
    Input (w)500060307140829094501058011640126001342014060
    50Capacity (w)47406780931012380160702045025650317003870046800
    Input (w)5020613073608670100301139012720139901516016190

    Note:

    400v / 3 / 50Hz , 20 Deg Return Gas, no Sub-Cooling
    4 cylinder models supplied with one cylinder head prepared for capacity control (standard feature)
    Require additional cooling &/or return vapour limitations.

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