Zingfa QL62 Hermetic Compressor – 3 HP, R404A, LBP, Single-Phase 220 V, 2,708 W

Zingfa QL62 (QL-62) is a 3 HP hermetic reciprocating compressor manufactured for commercial refrigeration systems operating at minus temperatures, such as frozen storage cold rooms, freezer cabinets and deep freezers. It runs on R404A; with its 62.7 cm³ displacement it delivers a cooling capacity of 2,708 W (9,240 BTU/h) at −23.3 °C evaporating / +54.5 °C condensing (LBP) conditions. As it is supplied with 220-240 V single-phase power, it can be used in premises without a three-phase supply.

R404A 3 HP LBP Single-Phase Reciprocating Compressor: For Frozen Storage Cold Rooms

The QL series, manufactured by Zhejiang Ankang (Xingfa), is designed for low back pressure (LBP) applications; it operates in the −40 … −10 °C evaporating range. The 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 QL62 · manufacturer Zhejiang Ankang (Xingfa)
• Refrigerant: R404A
• Application: LBP (low back pressure) · evaporating −40 … −10 °C · condensing +30 … +60 °C
• Displacement: 62.7 cm³ · speed ≥2,860 rpm
• Motor: single-phase, 2 pole · locked rotor current (LRA) 74 A · rated running current 11.1 A · winding resistance main 0.68 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

Rated Performance

−23.3 °C evaporating / +54.5 °C condensing (suction gas 32 °C, subcooling 22.2 K, ambient 32 °C): 2,708 W (9,240 BTU/h) cooling capacity, 1,800 W input power, COP 1.5. Capacity decreases as the evaporating temperature drops; make your selection according to your cabinet target 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 must not be run without a refrigerant charge or under vacuum. The refrigerant charge must be made from a 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 running and at least 3 minutes between stop and start are recommended. The system must have pressure, temperature and overcurrent protection; tilt must not exceed 15° during operation.