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The range of hermetic inverter reciprocating compressors Danfoss VTZ was designed for different applications in medium and high evaporating temperature refrigeration systems.  Models with continuously variable capacity control from 1800 to 5400 rpm avoid oversizing and too frequent switching-on of systems thanks to automatic adaptation to the current load in commercial air conditioning units, chillers and rooftops. Compressors are adapted to work on R134a, R407C, R404A refrigerants with capacity range from 12.1 to 68.5 m³/h. They are characterized by a low noise level during part load operation, lower installation costs due to a lower number of elements.  The frequency converter is an accessory for the compressor.

The range of hermetic inverter reciprocating compressors Danfoss VTZ was designed for different applications in medium and high evaporating temperature refrigeration systems.  Models with continuously variable capacity control from 1800 to 5400 rpm avoid oversizing and too frequent switching-on of systems thanks to automatic adaptation to the current load in commercial air conditioning units, chillers and rooftops. Compressors are adapted to work on R134a, R407C, R404A refrigerants with capacity range from 12.1 to 68.5 m³/h. They are characterized by a low noise level during part load operation, lower installation costs due to a lower number of elements.  The frequency converter is an accessory for the compressor.

Applications:

  • high and medium evaporating temperatures
    • R134a from -15 °C to 15 °C
    • R404A from -30 °C to 5 °C
    • R407C from -15 °C do 15 °C
  • Packaged air conditioning
  • Rooftops
  • Chillers
  • Close controls
  • Heat pumps
  • Data centers

VTZ series features:

  • displacement from 12,1 m³/h to 68,5 m³/h
  • cooling capacity:
    • from 4.40 kW to 29.01 kW (for te=-10 ºC, tc=45 ºC, SH=10K, SC=0K, R404A, 5400 rpm)
    • from 1.69 kW to 9.10 kW (for te=-10 ºC, tc=45 ºC, SH=10K, SC=0K, R404A, 1800 rpm)
  • filled with polyester oil
  • cooling with vapors of suction gas

Capacity regulation from 1800 rpm to 5400 rpm, adapts motorspeed to varying load continuously, quickly and smoothly. Tight temperature control ±0.3 °C.

VTZ inverter compressors are characterized by lower noise level during part-load operation, high COP for energy saving and lower installation costs due to fewer components.

Standard equipment:

  • only in sets compressors + converter
  • rubber vibration absorbers
  • oil sight glass
  • oil equalization

Optional equipment:

  • crankcase heater
  • belt type heater
  • Rotalock valves
  • soft-start kit

VTZ series advantages:

  • Capacity modulation from 1800 r/min to 5400 r/min
  • Tight temperature control ±3 °C
  • Pre-qualified compressor and drive package
  • Drive protection
  • Advanced energy efficiency cuts the electric bill and easily meets the energy standards
  • Lower noise level during part-load operations
  • Reduces the size of needed power back up systems
  • Reduces installation costs with elimination of components

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