Danfoss MTZ80-4VI Compressor

The Danfoss MTZ80-4VI is a heavy-duty 7 HP reciprocating compressor engineered for medium-to-high evaporating temperature applications featuring R134a, R404A, R407c, or R507A refrigerants. Operating on a 460V / 3-phase / 60Hz electrical configuration, this Maneurop displacement unit utilizes 160PZ polyolester lubricant, making it a reliable drop-in solution for refrigeration systems requiring high resilience against liquid slugging. With a displacement of 135.78 cm³/rev and a suction thermal insulation design, it maintains consistent BTU/hr capacity across variable load demands. The MTZ80HP4AVE internal design minimizes vibration through its high-torque motor and robust suction muffler, ensuring reliable performance in demanding commercial walk-in coolers or industrial process chillers. For technicians performing retrofits, ensure the suction line matches the 1-3/4" Rotolock connection to maintain optimal mass flow rates without excessive pressure drops.

Key Benefits for Technicians

• Broad Refrigerant Compatibility: Optimized for HFCs like R404A and R134a, providing versatile application utility across multiple cooling systems.
• Mechanical Durability: Large internal volume and oil sump protect the hardware against liquid floodback incidents, a common failure point in refrigeration.
• Quiet Operation: Internal motor suspension and precision-balanced components reduce harmonic resonance and mechanical wear.
• Seamless Integration: Standard Rotolock valves and mounting footprint facilitate rapid field replacement for existing Maneurop installations.
• Thermal Protection: Internal overload protection guards the three-phase motor against phase loss and excessive heat buildup.

Common Installation Questions

Is the MTZ80-4VI compatible with older R22 systems?
No, this model is designed for HFC refrigerants and uses POE oil. For R22 applications, the MT series is the appropriate mechanical equivalent due to its mineral oil compatibility.

What is the proper oil level for this compressor?
The oil level should be visible between 1/4 and 3/4 of the sight glass under operating conditions. Always check the crankcase heater function before commissioning to prevent oil dilution.

What are the wiring requirements for a 460V 3-phase installation?
Ensure the contactor and breakers are rated for the Maximum Continuous Current (MCC). Always verify phase rotation to prevent the compressor from running in reverse, which can cause lubrication failure.

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.