Zingfa QR58 Hermetic Compressor – 2.5 HP, R404A, Single Phase 220 V, 7,967 W

Zingfa QR58 (QR-58) is a 2.5 HP hermetic reciprocating compressor manufactured for commercial refrigeration systems operating at plus temperatures, such as cold rooms, fruit and vegetable stores, beverage and display coolers. It runs on R404A; with its 58.2 cm³ cylinder volume it delivers 7,967 W (27,183 BTU/h) cooling capacity at +7.2 °C evaporating / +54.5 °C condensing. Since it is supplied with 220-240 V single phase, it can be used in businesses without a three-phase line.

2.5 HP Single Phase Reciprocating Compressor on R404A: For Plus-Temperature Cold Rooms and Commercial Coolers

The QR series, manufactured by Zhejiang Ankang (Xingfa), is designed for medium and high back pressure (M/HBP) applications; it operates in the −30 … +10 °C evaporating range. Its CSR motor starts with a start and run capacitor and a potential relay; it is protected by an internal motor overload protector and an internal pressure relief valve. It has threaded (rotalock) suction and discharge connections, an oil level sight glass and a crankcase heater connection.

Key Technical Specifications and Equipment

• Brand / Model: Zingfa QR58 · manufacturer Zhejiang Ankang (Xingfa)
• Refrigerant: R404A
• Application: M/HBP (medium/high back pressure) · evaporating −30 … +10 °C · condensing +30 … +60 °C
• Cylinder volume: 58.2 cm³ · speed 2,900 rpm
• Motor: single phase, 2-pole · locked rotor current (LRA) 70 A · rated running current 13.5 A · winding resistance main 0.69 Ω / auxiliary 2.68 Ω (25 °C) · insulation class F
• Power supply: 220-240 V ~ 50 Hz (208-230 V ~ 60 Hz)
• Protection: internal motor overload protector · internal pressure relief valve
• Oil: POE, ISO VG 32, 1,500 ml · oil level sight glass
• Connections: suction 1 1/4"-12 UNF · discharge 1"-14 UNF (rotalock) · service (process) tube Ø7 mm
• Dimensions: height 365 mm · base 244 × 198 mm
• Mounting: 4 holes (190.5 × 190.5 mm) · with 4 rubber grommets
• Weight: 34 kg (including oil) · noise ≤ 65 dB(A) · protection class IP21
• Pressure limits: high side max. 3.2 MPa · low side max. 2.0 MPa · discharge temperature ≤ 125 °C

Nominal Performance

+7.2 °C evaporating / +54.5 °C condensing (suction gas 35 °C, subcooling 8.3 K, ambient 35 °C): 7,967 W (27,183 BTU/h) cooling capacity, 3,080 W input power, COP 2.59. Capacity decreases as the evaporating temperature falls; make your selection according to your target cabinet temperature.

Electrical Equipment (Manufacturer References)

• Start capacitor: 156-186 µF 330 V
• Run capacitor: 35 µF
• Relay: potential relay 4G3D

• 🔧 Commissioning: The system is not evacuated with the compressor; the compressor is not run without a refrigerant charge or under vacuum. Refrigerant charging must be done from the remote charging point, not from the suction/discharge line close to the compressor. Installation must be completed within 15 minutes after the connection plugs are removed.
• 🌡️ Crankcase heater: A crankcase heater (45 W) is recommended to prevent refrigerant migration during standstill; it must be energised 12 hours before the first start or after a long standstill. Liquid return must be prevented by maintaining suction line superheat.
• ⏱️ Operating pattern: To maintain the oil level, at least 10 minutes of continuous operation and at least 3 minutes of waiting between stop-start cycles are recommended. The tilt must not exceed 15° during operation.