Danfoss NTZ271A4LR1B Hermetic Reciprocating Compressor (120F0242) | 10 HP | 27,400 BTU/h LBP Low Temperature | R404A | 271 cm³ | 400V 3-Phase

The Danfoss Maneurop NTZ271A4LR1B is a hermetic reciprocating compressor (Danfoss code: 120F0242) designed for low temperature (LBP) commercial refrigeration applications such as freezers, blast freezing, low temperature cold rooms and low temperature display cabinets. With its four-cylinder design, 271 cm³ displacement and 10 HP power, it delivers 27,400 BTU/h (8,030 W) cooling capacity with R404A at the ASHRAE LBP condition (evaporating -31.7°C / condensing +40.6°C). It operates with R404A, R507A and R452A; it is charged with POE oil.

Low Temperature (LBP) Maneurop NTZ Reciprocating Compressor — 10 HP / 27,400 BTU/h

The Maneurop NTZ series is the low temperature sibling of the MTZ (medium temperature) and is designed to operate at evaporating temperatures down to -35°C. The NTZ271 is the largest model in the series: it comes with four cylinders, internal thermal motor protection and rotalock suction and discharge connections. The same compressor is listed by Danfoss under code 120F0242 in single packaging and 120F0243 in industrial packaging.

Key Technical Features and Equipment

• Nominal Capacity: 10 HP (10 horsepower) / 27,400 BTU/h (8,030 W) — R404A, ASHRAE LBP (te -31.7°C / tc +40.6°C), 50 Hz.
• Low Temperature (LBP): Freezer, blast freezing, low temperature cold room and display applications.
• Four-Cylinder Reciprocating Design: 271 cm³ displacement, 47.3 m³/h (50 Hz).
• Refrigerant Compatibility: R404A, R507A, R452A.
• Rotalock Connection: Suction 1 3/4 inch, discharge 1 1/4 inch.

Technical Specifications

• Brand / Model: Danfoss Maneurop / NTZ271A4LR1B (NTZ271-4)
• Danfoss Codes: 120F0242 (single packaging) · 120F0243 (industrial packaging), same compressor
• Type: Hermetic reciprocating, 4 cylinders, low temperature (LBP)
• Nominal Power: 10 HP (10 horsepower)
• Cooling Capacity (R404A, 50 Hz): 27,400 BTU/h (8,030 W) @ te -31.7°C / tc +40.6°C · 35,240 BTU/h (10,330 W) @ te -23.3°C / tc +48.9°C
• Power Input (50 Hz): 6.29 kW · 10.53 A (te -31.7°C / tc +40.6°C)
• Displacement: 271 cm³ · 47.3 m³/h (50 Hz, 2900 rpm) · 57.0 m³/h (60 Hz, 3500 rpm)
• Compatible Refrigerants: R404A, R507A, R452A
• Power Supply: 400V / 3-phase / 50 Hz and 460V / 3-phase / 60 Hz (50 Hz operating range 340-460 V)
• Current: MCC 27 A · LRA (locked rotor) 96 A · maximum operating current 19.5 A
• Motor Protection: Internal thermal (internal overload)
• Electrical Connection: Screw terminal 10-32 UNF, IP54 (with cable gland)
• Oil: POE 175PZ, 3.9 L
• Connections: Suction 1 3/4 inch rotalock (1 1/8 inch tube), discharge 1 1/4 inch rotalock (3/4 inch tube); oil equalisation 3/8 inch flare; low pressure service port (Schrader). Compatible rotalock valves: V02 (suction) / V04 (discharge).
• Crankcase Heater: The housing has a mounting location for a PTC crankcase heater
• Box Contents: Suction and discharge brazing sleeves, rotalock nuts and gaskets
• Dimensions: Height 519 mm, diameter 352 mm
• Weight: Net 64 kg (gross 67.5 kg)
• Pressure Limits: High pressure side max. 28.5 bar · low pressure side max. 22.6 bar
• Start Limit: Maximum 12 starts per hour
• Maximum Refrigerant Charge: 10 kg
• Approvals: CE, UKCA

Technician Tips

• Braze the rotalock connections and tubes under nitrogen to prevent internal oxidation.
• In low temperature applications, select the correct refrigerant (R404A/R507A/R452A) and a suitable expansion device.
• POE oil absorbs moisture; evacuate the system thoroughly before commissioning (moisture = acid + winding failure).
• Set the thermostat differential and short-cycle protection so that the limit of 12 starts per hour is not exceeded.
• The stated capacity is at the ASHRAE LBP condition (te -31.7°C / tc +40.6°C); confirm the actual capacity for your own evaporating/condensing temperatures with Danfoss Coolselector.