Zingfa QR3-74 hermetic compressor
3 HP three-phase piston compressor for R448A, R449A, R452A and R404A. Also listed as Xingfa QR3-74 and Ankang QR3-74.
- Rated at +7.2 °C evaporating, +54.5 °C condensing
- 9,984 W
- Three-phase
- 3 HP
- POE, 1,500 mL
- R404A
Specifications from the datasheet
Some values that conflict within the manufacturer datasheet are not listed here. Ask TURA for confirmed figures.
General
- Rated refrigerant
- R404A
- Nominal power
- 3 HP
- Displacement
- 74.25 cc
- Oil
- POE, 32 cSt
- Oil charge
- 1,500 mL
- Rated speed
- 2,900 rpm
- IP class
- IP21
Rated performance
- Cooling capacity
- 9,984 W / 34,000 BTU/h
- Rated run current
- 6.7 A
- Sound power
- ≤ 65 dB(A)
- Evaporating temperature
- +7.2 °C
- Condensing temperature
- +54.5 °C
- Suction temperature
- +35 °C
- Liquid subcooling
- 8.3 K
- Ambient temperature
- +35 °C
Electrical
- Motor
- Three-phase
- Motor poles
- 2
- Power supply, 50 Hz
- 380-400 V 3~ 50 Hz
- Power supply, 60 Hz
- 460 V 3~ 60 Hz
- Winding resistance at 25 °C
- 3.4 Ω
- Locked rotor current
- 39 A
- Insulation class
- F
Connections
- Suction
- 1 1/4"-12 UNF
- Discharge
- 1"-14 UNF
- Process tube
- Ø7 ±0.2 (ID), Ø10 (OD)
Operating limits
- Tightness test pressure
- 2.2 MPa
- High side max running pressure
- 3.2 MPa
- Low side max running pressure
- 2 MPa
- Discharge temperature limit
- ≤ 125 °C
- Protection
- Internal motor protector, internal pressure relief
Performance at 50 Hz by duty point
R404A values from the manufacturer datasheet, with 35 °C return gas and 8.3 K subcooling. Rated values above can differ from these tables.
| Evaporating / Condensing | 30 °C | 35 °C | 40 °C | 45 °C | 50 °C | 55 °C | 60 °C |
|---|---|---|---|---|---|---|---|
| −20 °C | 4,682 | 4,427 | No value published | No value published | No value published | No value published | No value published |
| −15 °C | 6,178 | 5,890 | 5,300 | 4,692 | No value published | No value published | No value published |
| −10 °C | 7,921 | 7,583 | 6,894 | 6,189 | 5,830 | 5,102 | No value published |
| −5 °C | 9,956 | 9,550 | 8,728 | 7,891 | 7,467 | 6,612 | 5,753 |
| 0 °C | 12,323 | 11,835 | 10,847 | 9,845 | 9,340 | 8,326 | 7,315 |
| 5 °C | 15,069 | 14,482 | 13,298 | 12,102 | 11,500 | 10,296 | 9,105 |
| 10 °C | 18,240 | 17,540 | 16,132 | 14,713 | 14,002 | 12,582 | 11,190 |
| Evaporating / Condensing | 30 °C | 35 °C | 40 °C | 45 °C | 50 °C | 55 °C | 60 °C |
|---|---|---|---|---|---|---|---|
| −20 °C | 2,194 | 2,215 | No value published | No value published | No value published | No value published | No value published |
| −15 °C | 2,467 | 2,502 | 2,560 | 2,602 | No value published | No value published | No value published |
| −10 °C | 2,743 | 2,788 | 2,868 | 2,935 | 2,964 | 3,010 | No value published |
| −5 °C | 3,032 | 3,083 | 3,179 | 3,266 | 3,305 | 3,376 | 3,434 |
| 0 °C | 3,347 | 3,401 | 3,506 | 3,606 | 3,653 | 3,741 | 3,820 |
| 5 °C | 3,698 | 3,753 | 3,861 | 3,966 | 4,017 | 4,117 | 4,211 |
| 10 °C | 4,098 | 4,150 | 4,254 | 4,359 | 4,412 | 4,516 | 4,618 |