Danfoss MTZ22-4VI Compressor

The Danfoss MTZ22-4VI (MTZ22JC4BVE) is a heavy-duty hermetic reciprocating compressor optimized for medium-temperature refrigeration. This 1-cylinder unit operates on a 380-400V/3ph/50Hz and 460V/3ph/60Hz power supply, delivering a cooling capacity of 14,849 BTU/h with R134a (45°F evap/130°F cond) and 12,306 BTU/h with R404A (20°F evap/120°F cond). Designed for field versatility, it features a 1" Rotolock suction (1/2" ODF sleeve) and 1" Rotolock discharge (3/8" ODF sleeve), along with a 3/8" NPT oil equalization port for parallel configurations. Charged with 0.95L of 175PZ polyester oil, the MTZ22-4VI is compatible with a broad range of HFC and HFO refrigerants, including R407C, R407F, R452A, and R513A. Its robust construction supports a maximum operating pressure of 29.4 bar on the high side, making it a reliable standard for walk-in coolers and commercial display cases.

Key Benefits

• Multi-Refrigerant Versatility: Certified for use with R404A, R134a, R407C, R407F, R448A, and R449A, allowing for easy adaptation to various system requirements.
• High Thermal Stability: Specifically designed to handle high suction gas temperatures, reducing the risk of motor burnout in demanding commercial environments.
• Simplified Installation: The Rotolock connection system facilitates faster swap-outs and piping adjustments compared to direct brazed alternatives.
• Internal Protection: Features internal line break overload protection to safeguard the motor against excessive current and temperature spikes.
• Standardized Footprint: Designed to replace common 1-cylinder Maneurop models with minimal modification to mounting brackets or piping.

Common Questions

What oil is required for the Danfoss MTZ22-4VI?
This compressor is pre-charged with 175PZ POE oil. When retrofitting or servicing, always ensure the system is flushed and that only compatible polyester oil is used to maintain lubricant integrity with HFC refrigerants.

Can this compressor replace the MT22-4VI series?
The MTZ series is the POE-charged version of the MT series. While physically identical in dimensions and electrical specs, the MTZ must be used for HFC applications, whereas the older MT used mineral oil for R22. Verify your refrigerant type before installation.

What is the LRA rating for the 460V 3-phase model?
The Locked Rotor Amps (LRA) for this unit is 20A, with a Maximum Continuous Current (MCC) of 6A, ensuring efficient performance within standard 3-phase industrial power parameters.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.