Zingfa QR3-124 Hermetic Compressor – 6 HP, R404A, Three-Phase 380 V, 16,650 W

Zingfa QR3-124 is a 6 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 124.4 cm³ displacement it delivers a cooling capacity of 16,650 W (56,810 BTU/h) at +7.2 °C evaporating / +54.5 °C condensing conditions. It is supplied with 380-400 V three-phase power; no capacitor or relay is required.

R404A 6 HP Three-Phase Reciprocating Compressor: For Plus-Temperature Cold Rooms and Commercial Coolers

The QR3 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. 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 QR3-124 · manufacturer Zhejiang Ankang (Xingfa)
• Refrigerant: R404A
• Application: M/HBP (medium/high back pressure) · evaporating −30 … +10 °C · condensing +30 … +60 °C
• Displacement: 124.4 cm³ · speed 2,900 rpm
• Motor: 3 phase, 2 pole · locked rotor current (LRA) 70 A · rated running current 10.6 A · winding resistance 2.2 Ω (25 °C) · insulation class F
• Power supply: 380-400 V / 3~ / 50 Hz (460 V / 3~ / 60 Hz) · no capacitor or relay required
• Protection: internal motor overload protector · internal pressure relief valve
• Oil: POE, ISO VG 32, 2,000 ml · oil level sight glass
• Connections: suction 1 3/4"-12 UNF · discharge 1 1/4"-12 UNF (rotalock) · service (process) tube Ø7 mm
• Dimensions: height 398 mm · base 320 × 225 mm
• Mounting: 4 holes (190.5 × 190.5 mm) · with 4 rubber grommets
• Weight: 48 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

+7.2 °C evaporating / +54.5 °C condensing (suction gas 35 °C, subcooling 8.3 K, ambient 35 °C): 16,650 W (56,810 BTU/h) cooling capacity, 6,800 W input power, COP 2.45. Capacity decreases as the evaporating temperature drops; make your selection according to your cabinet target temperature.

• ⚡ Three-phase connection: The compressor must not be run in the reverse direction for long periods; the phase sequence and the phase protection relay must be checked. The system must have pressure, temperature, oil return, overcurrent and phase failure protection.
• 🔧 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. Tilt must not exceed 15° during operation.