Danfoss MT144-4VI Compressor

The Danfoss MT144-4VI is a heavy-duty R22 reciprocating compressor engineered for medium and high evaporating temperature applications in commercial refrigeration and HVAC systems. Part of the Maneurop MT series, this 4-cylinder unit features a displacement of 14.78 cu.in/rev and delivers a nominal capacity of 140,697 Btu/h under standard rating conditions (45°F SST / 130°F SCT). This compressor is designed for 460V 3-phase 60Hz or 380-400V 50Hz power supplies and utilizes mineral oil (160P) for internal lubrication. Built with a large internal free volume to mitigate the risk of liquid slugging, the Maneurop MT144 series is known for its ruggedness in demanding environments. Connections include a 1 3/4" Rotolock suction with 1 1/8" ODF sleeve and 1 1/4" Rotolock discharge with 3/4" ODF sleeve, alongside a 3/8" NPT oil equalization port for parallel compressor rack configurations. This industrial HVAC compressor is a standard choice for contractors looking for high-capacity refrigeration reliability and drop-in compatibility for legacy R22 systems.

Key Benefits

• Durability: 100% suction gas-cooled motor and large internal volume provide superior resistance to liquid slugging and high ambient temperatures.
• Versatility: Dual-frequency motor allows for operation on both 50Hz and 60Hz power grids, ideal for diverse regional power requirements.
• Efficiency: High torque motor and precision valve plates ensure consistent BTU/h performance and low energy consumption in medium-to-high temp cycles.
• Simplified Installation: Features standard Rotolock fittings and an oil equalization port to streamline field replacement or manifolding.

Common Questions

What oil should be used with the MT144-4VI?
This specific model is designed for R22 refrigerant and must use mineral oil (160P). If converting to an HFC refrigerant, a complete oil flush and transition to POE (MTZ series equivalent) may be necessary.

Can I use this compressor in a parallel manifold configuration?
Yes, the MT144-4VI includes a 3/8" NPT oil equalization connection, making it suitable for multi-compressor racks where maintaining consistent oil levels across the bank is critical.

Does this unit come with an internal motor protection?
Yes, it features internal line break protection to safeguard against motor burnout caused by overcurrent or excessive temperatures.

This item must ship via truck. Please contact us for freight quote.

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.