Embraco NEU6212GK Refrigerator Motor (Hermetic Compressor) – 3/8 HP, R404A, MBP, 1,433 W / 4,890 BTU/h, 220-240 V

Embraco NEU6212GK (also searched for on the market as NEU 6212 GK and 6212 GK) is a hermetic reciprocating refrigerator motor (compressor) operating with R404A. According to the Embraco data sheet it is designed for MBP (medium temperature) applications and operates in the −20 … +10 °C evaporating temperature range. With a displacement of 8.77 cm³ it delivers 1,433 W (4,890 BTU/h) cooling capacity at the ASHRAE rating point (+7.2 °C evaporating / +54 °C condensing); power input is 631 W and efficiency is 2.27 W/W. Its single-phase CSIR motor runs on a 220-240 V / 50 Hz mains supply. It is used in commercial refrigerated cabinets, display cabinets and similar medium temperature refrigeration systems.

Important: The Embraco data sheet specifies the cooling method of this compressor as fan and requires an air flow of 520 m³/h. The compressor must not be installed without providing a fan blowing air over it.

Hermetic Compressor Operating with R404A in MBP (Medium Temperature) Systems

The system can operate with a capillary tube or an expansion valve. Since the motor type is CSIR, a start capacitor and a current relay are used at start-up; the Embraco data sheet specifies a 53-64 µF 330 V start capacitor, a current relay and a 3/4 inch external overload protector. The terminal cover, rubber grommets, bushes, terminal plate and overload protector bracket are supplied with the compressor. The mains voltage must be in the 198-254 V range at 50 Hz; the locked rotor current (LRA) is 19 A.

The compressor oil is POE (polyolester) ISO 22 type and the factory charge is 350 ml ±15 ml. The maximum refrigerant charge that can be put into the system is 350 g according to Embraco. The compressor is supplied pressurised with dry air; the body weighs 10.9 kg.

Technical Specifications (Embraco Official Data Sheet)

• Brand / Model: Embraco NEU6212GK · Embraco code 958HA51M1AJ
• Type: hermetic reciprocating (on-off) · single-phase CSIR motor · HST high starting torque
• Application / Refrigerant: MBP (medium temperature) · R404A
• Evaporating Temperature Range: −20 … +10 °C
• Power Class: 3/8 HP (Embraco European catalogue commercial class: 1/2 HP)
• Cooling Capacity: 1,433 W (4,890 BTU/h) · ASHRAE: +7.2 °C evaporating / +54 °C condensing, 35 °C return gas, 8.3 K subcooling, 35 °C ambient, fan-cooled
• Power Input / Current / Efficiency: 631 W · 3.75 A · 2.27 W/W (at rating point)
• Displacement: 8.77 cm³ · bore 26.5 mm · stroke 15.92 mm
• Electrical: 220-240 V / 50 Hz (operating range 198-254 V) · LRA 19 A · start winding 27.04 Ω, run winding 4.87 Ω (25 °C) · maximum motor temperature 130 °C
• Electrical Components (data sheet): start capacitor 53-64 µF 330 V · current relay · 3/4 inch external overload protector
• Oil: POE (polyolester) ISO 22 · 350 ml ±15 ml
• Cooling Method: fan-cooled · 520 m³/h air flow
• Expansion Device: capillary tube or expansion valve
• Maximum Refrigerant Charge: 350 g
• Free Internal Volume: 2.1 cm³
• Weight: 10.9 kg
• Approvals: CE · VDE · CCC · EAC

Dimensions, Connections and Installation Notes

• Overall Dimensions: height 200 mm · body width 199 mm · width including connections 241 mm · depth 162 mm
• Base Plate: European type · width 203 mm · mounting holes Ø16 mm (6 pcs) · hole centre spacing 170 mm and 178 mm (horizontal), 70 mm and 100 mm (vertical)
• Suction Connection: copper, inside diameter 8.10-8.20 mm (corresponds to 5/16 inch tube) · 42° angled
• Discharge Connection: copper, inside diameter 6.10-6.20 mm (corresponds to 1/4 inch tube) · straight
• Service (Process) Connection: copper, inside diameter 6.10-6.20 mm · 42° angled

Capacity Table (Embraco Performance Curve, 220 V / 50 Hz)

Values are measured under ASHRAE conditions (35 °C return gas, 8.3 K subcooling, 35 °C ambient, fan-cooled) with a tolerance of ±5%.

Technician Tips

• Do not neglect the fan: the compressor is designed to be fan-cooled; Embraco requires an air flow of 520 m³/h. Direct the air flow of the condenser fan over the compressor body as well.
• Stay within the operating envelope: the evaporating temperature must be in the −20 … +10 °C range. Embraco considers use of the unit outside its specified operating range to be outside the scope of coverage.
• Do not exceed the charge quantity: the amount of R404A put into the system must not exceed 350 g; for systems requiring a larger charge, a compressor of the next capacity up should be selected.
• Take care with POE oil: the compressor contains POE (polyolester) ISO 22 oil. POE oil absorbs moisture quickly; open the compressor immediately before installation, evacuate the system thoroughly and replace the filter drier to avoid the risk of blockage.
• Wire the electrical connection correctly: the CSIR motor operates with a start capacitor (53-64 µF 330 V), current relay and 3/4 inch external overload protector. Keep the mains voltage in the 198-254 V range; the locked rotor current is 19 A.
• Select tube diameters according to the connections: suction inside diameter 8.10-8.20 mm (5/16 inch), discharge and service inside diameter 6.10-6.20 mm (1/4 inch), copper.

Technical document: Embraco NEU6212GK technical data sheet (PDF, English)