Danfoss MTZ18-4VI Compressor

The Danfoss MTZ18-4VI is a specialized hermetic reciprocating compressor engineered for medium and high evaporating temperature applications. Operating on 460V 3-Phase power at 60Hz, this 1.5HP unit is pre-charged with polyolester (POE) oil (160PZ), making it ready for HFC refrigerants including R404A, R134a, R407C, and R507A. As part of the Maneurop MTZ series, it features a high-torque motor and a large internal free volume that provides superior protection against liquid slugging. The 100% suction-gas cooled motor ensures consistent thermal management without requiring additional cooling fans, even in demanding environments. This Danfoss MTZ18-4VI 460V model utilizes a circular valve design for high volumetric efficiency and is equipped with a 1-inch Rotolock suction connection and 1-inch Rotolock discharge. Technical pros value the integrated oil sight glass and 3/8-inch NPT oil equalization port, which simplify parallel manifolding and oil level monitoring during routine maintenance. Whether you are performing a Danfoss MTZ18-4VI replacement for a Trane or Tecumseh unit or installing a new system, this compressor delivers reliable 18,000 BTU/h cooling capacity (rating dependent on refrigerant) with rugged, industrial-grade durability.

• Multi-Refrigerant Compatibility: Fully optimized for R404A, R134a, and R407C, allowing for versatile field applications and inventory reduction.
• Slug Resistance: Large internal shell volume provides a significant safety buffer against liquid refrigerant returning to the compressor.
• Efficient Motor Cooling: The 100% gas-cooled motor design allows for acoustic insulation jackets to be used without the risk of overheating.
• Simple Installation: Standard Rotolock connections and ODF sweat sleeves streamline the brazing process and reduce leak points.
• Maintenance Ready: Factory-installed oil sight glass and equalization port facilitate quick inspections and multi-compressor configurations.

What oil is used in the Danfoss MTZ18-4VI?
This model is factory-charged with 160PZ polyolester (POE) oil, specifically intended for use with HFC refrigerants. If you are replacing an older MT series (mineral oil) unit, ensuring oil compatibility is critical.

Is this compressor a direct replacement for other brands?
Yes, the MTZ18-4VI is frequently used as a drop-in replacement for equivalent 1.5HP 460V reciprocating models from manufacturers like Trane and Tecumseh, provided the electrical and piping specifications align.

Does it require a crankcase heater?
While the large internal volume resists liquid hammering, a crankcase heater is highly recommended for systems where the compressor is located in cold ambient conditions to prevent refrigerant migration during the off-cycle.

Danfoss MTZ18-4VI 460V 3Ph 1.5HP Recip Compressor Truck Only; Please Contact Us For the Freight Charge.

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.