Danfoss MTZ28-4VI Compressor

The Danfoss MTZ28-4VI is a specialized Maneurop reciprocating compressor designed for medium to high evaporating temperature applications in commercial refrigeration. Engineered for versatility, the Danfoss MTZ28JE4AVE is compatible with a broad range of HFC and HFO refrigerants, including R134a, R404A, R407C, and R407F. Operating on a 380-400V/3Ph/50Hz and 460V/3Ph/60Hz power supply, this unit provides a nominal capacity of 19,276 Btu/h with R134a and 15,986 Btu/h with R404A/R507A under standard ARI conditions. The 175PZ polyolester oil charge ensures optimal lubrication for high-torque performance and internal motor protection. Professionals often choose this three-phase refrigeration compressor for its robust circular valve design and large internal volume, which manages liquid slugging effectively. With its 1" Rotolock suction and discharge connections, featuring 1/2" and 3/8" ODF sweat sleeves respectively, it facilitates seamless integration into existing HVACR systems requiring high reliability and efficient thermal management.

• Multi-Refrigerant Compatibility: Approved for use with R404A, R407C, R134A, R407F, and several low-GWP blends, allowing for easier retrofitting and inventory management.
• Enhanced Durability: Features an internal pressure relief valve and large internal free volume to protect against high-pressure discharge and liquid refrigerant return.
• Flexible Installation: Equipped with standard 1" Rotolock connections and a 3/8" NPT oil equalization port, simplifying parallel piping and multi-compressor rack configurations.
• High-Torque Performance: The 3-phase motor design provides reliable starting under high load conditions and includes internal overload protection for electrical safety.

What is the correct oil type for the MTZ series?
The MTZ series specifically requires 175PZ polyester oil (POE). Unlike the MT series, which uses mineral oil, the POE oil in this unit is mandatory for HFC refrigerant compatibility.

Can the MTZ28-4VI be used in both 50Hz and 60Hz environments?
Yes, this dual-frequency compressor is rated for 380-400V at 50Hz and 460V at 60Hz, making it suitable for a wide variety of industrial and commercial power grids.

What are the connection sizes for this model?
It utilizes 1" Rotolock fittings for both suction and discharge. Included with the unit are a 1/2" ODF suction sleeve and a 3/8" ODF discharge sleeve for sweat-type installation.

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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.