Cubigel B25G Hermetic Compressor – 1/14 HP, R134a, HBP 241 W

Cubigel B25G is a 1/14 HP hermetic reciprocating compressor manufactured for positive-temperature appliances such as water dispensers, can and bottle coolers and small refrigerators. It operates with R134a; with a displacement of 2.6 cm³ it delivers a cooling capacity of 241 W (822 BTU/h) under ASHRAE HBP conditions (220-240 V / 50 Hz).

Compact R134a HBP Compressor: For Water Dispensers, Bottle Coolers and Small Refrigerators

It is one of the smallest models of the B series: 145 mm high and 4.65 kg. It is manufactured within the Huayi group, to which the Cubigel brand belongs. The RSIR motor starts with a PTC starting relay and needs no start capacitor. It can be used in capillary tube and expansion valve systems, with static or fan cooling. According to the manufacturer's data sheet it is also compatible with R1234yf.

Key Technical Specifications and Equipment

• Brand / Model: Cubigel B25G · B series · manufacturer Huayi Compressor
• Refrigerant: R134a · also compatible with R1234yf according to the manufacturer's data sheet
• Application: HBP (high back pressure) · evaporating −15 … +10 °C
• Nominal power: 1/14 HP · ASHRAE 241 W / 822 BTU/h
• Displacement: 2.60 cm³ · bore 17.2 mm · stroke 11.2 mm
• Motor: RSIR (PTC start) · locked rotor current (LRA) 3.2 A · main winding 13.40 Ω · start winding 38.90 Ω (25 °C)
• Power supply: 220-240 V / 50 Hz single-phase · operating range 187-255 V
• Cooling: static or fan cooled · expansion: capillary tube or expansion valve
• Oil: POE 32, 130 cm³
• Tube inner diameters: suction Ø6.1 · service Ø6.1 · discharge Ø5.1 mm
• Dimensions: height 145 mm · base 202 × 130 mm
• Mounting holes: 6 × Ø16 (170 × 70 mm)
• Weight: 4.65 kg · max. ambient temperature 43 °C

Performance (220-240 V / 50 Hz)

Condensing temperature +55 °C in both conditions. ASHRAE: liquid 46 °C, ambient and suction 35 °C · CECOMAF: liquid 55 °C, ambient and suction 32 °C. Capacity decreases as the evaporating temperature drops.

Electrical Equipment (Manufacturer References)

• PTC starting relay: JPQII-22 or QP2-22
• Thermal protector: BT37-120, BT37-120A61D3 or DRB15N61A1 (3.7 A · open/close 120/61 °C)

• 🔧 When replacing: fit the PTC relay and protector according to the RSIR wiring. Compare the old compressor's refrigerant, HBP class and mounting hole spacing with the dimensional drawing.
• Application limit: this model is HBP — for positive-temperature coolers only. It is not used in freezers or freezer compartments (LBP).