Danfoss MTZ44-4VI Compressor

The Danfoss MTZ44-4VI is a specialized hermetic reciprocating compressor engineered for medium and high temperature refrigeration applications. Operating on a 460V 3-phase power supply at 60Hz, this Maneurop series unit delivers a nominal capacity of 45,200 BTU/hr. Specifically designed for use with R404A, R134a, R407C, and R507A refrigerants, it features a generous 4.41 cubic inch displacement and utilizes 160PZ polyolester (POE) oil to ensure consistent lubrication and internal component longevity. The rotalock connection design simplifies installation and field replacement, making it a preferred choice for commercial walk-in coolers and industrial process chillers. This MTZ series compressor is built with a large internal free volume to mitigate risk during liquid slugging events, while its robust motor protection ensures reliability under demanding duty cycles. For contractors doing a refrigeration compressor replacement, this unit offers the thermal efficiency and mechanical durability required for high-ambient environments.

• Multi-refrigerant compatibility allows for versatile application across various HFC systems.
• Large internal oil reservoir provides superior lubrication and heat dissipation during high-load periods.
• Rotalock valves facilitate faster field piping and easier maintenance compared to brazed connections.
• Low sound power levels ensure the unit meets noise ordinances in commercial urban settings.
• High energy efficiency ratio (EER) reduces operational overhead for end-users in 24/7 cooling applications.

What is the correct oil type for the Danfoss MTZ44-4VI?
This compressor is pre-charged with 160PZ POE oil. When performing a retrofit or oil top-off, ensure the lubricant is compatible with the specific HFC refrigerant being used in the system.

Can this compressor replace an older MT series unit?
Yes, the MTZ series is the direct replacement for the MT series when transitioning from R22 to HFC refrigerants. Ensure that the expansion valve and filter drier are also updated to match the new refrigerant and oil characteristics.

What are the electrical requirements for the 4VI motor code?
The 4VI code signifies a 460V / 3-phase / 60Hz electrical configuration. Verify that the contactor and overcurrent protection are sized correctly for the Max Continuous Current (MCC) rating of this specific model.

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.