Cubigel NX23NGa Hermetic Compressor – 3/4 HP, R290, LMBP 1,003 W

Cubigel NX23NGa is a 3/4 HP hermetic reciprocating compressor built for commercial refrigeration appliances operating at sub-zero temperatures, such as freezer cabinets, island freezers and ice cream cabinets. It runs on R290 (propane); with a 23.20 cm³ displacement it delivers 1,003 W (3,422 BTU/h) at ASHRAE LMBP conditions of cooling capacity.

R290 Propane LMBP Compressor: For Freezer Cabinets and Island Freezers

With its X series body, fan-cooled design and CSR (start and run capacitor) motor, the NX23NGa operates in the −40 … 0 °C evaporating range and can be used in both capillary tube and expansion valve systems. Its 220-240 V 50/60 Hz supply range offers wide usability. Propane has a GWP of 3, making it a suitable option for low-charge systems unaffected by F-Gas restrictions.

Key Technical Specifications and Equipment

• Brand / Model: Cubigel NX23NGa · X series
• Refrigerant: R290 (propane) · EN 60335-1 and EN 60335-2-34 explosion safety approved for R290 and R600a
• Application: LMBP (low-medium back pressure) · evaporating −40 … 0 °C
• Displacement: 23.20 cm³ · bore 34.93 mm · stroke 24.20 mm
• Motor: CSR · locked rotor current (LRA) 31.6 A · max. continuous current 8.4 A
• Winding resistance (25 °C): main 2.56 Ω · auxiliary 6.50 Ω
• Power supply: 220-240 V / 50-60 Hz single-phase · operating range 187-255 V
• Cooling: fan-cooled · expansion: capillary tube or expansion valve
• Oil: ISO VG 32 ester, 650 cm³
• Tube inner diameters: service Ø9.7 · suction Ø9.7 · discharge Ø6.5 mm
• Dimensions: height 221 mm · base 217 × 174 mm (257.5 mm with terminal box)
• Mounting holes: 4 × Ø19 (178 × 114.3 mm) · plus 2 × Ø16
• Weight: 16.75 kg · max. ambient temperature 43 °C

Performance (ASHRAE, Condensing +55 °C)

ASHRAE: liquid and ambient 32 °C, suction 32 °C. At CECOMAF conditions (−25 °C, liquid 55 °C): 744 W, 683 W input power, COP 1.09. Capacity decreases as the evaporating temperature drops; choose according to your cabinet's target temperature.

Electrical Equipment (Manufacturer References)

• Start capacitor: 88-108 µF 330 V
• Run capacitor: 16 µF 420 V
• Relay: 2014 180 or QLZ 16.7A (with NTC 15 Ω · pick-up 16.7 A / drop-out 14 A)
• Thermal protector: T0258 (23.5 A · open / close 120 / 52 °C)

• 🔥 R290 is a flammable refrigerant (class A3). Brazing, leak testing and gas charging must follow the rules for flammable refrigerants: a ventilated area, no ignition sources and compliance with charge limits are mandatory. This compressor is for R290 systems only.
• 🔧 When replacing: In the CSR connection the start and run capacitors are used together; compare the old compressor's refrigerant, LMBP class and mounting hole spacing against the dimensional drawing.
• Application limit: This model is LMBP — intended for freezer and low-temperature applications.