一、Product Overview
The HRP series is a hermetic fixed-speed scroll compressor platform specifically developed by Danfoss under the H-Series for R407C refrigerant. As an environmentally friendly alternative to R22, R407C has an Ozone Depletion Potential (ODP) of zero. Its working pressure is approximately 10–15% higher than that of R22, imposing different requirements on motor insulation, sealing structures, and lubrication systems compared to R22 platforms. The HRP series is designed from the ground up to match the heat transfer and pressure characteristics of R407C.
The series covers displacements from 46.2 to 81.0 cm³/rev, with a nominal horsepower range of 3.4 to 6.0 HP and cooling capacities from approximately 10.0 kW to 14.5 kW (at 50Hz operating conditions). It is compatible with 3-phase 380-415V/50Hz and 460V/60Hz power supplies. It serves as a direct upgrade option for replacing R22 solutions in small and medium-sized commercial air conditioning, heat pump, and process cooling systems.
| Feature Dimension | Description |
| Brand | Danfoss |
| Technology Type | Hermetic flexible scroll, fixed-speed |
| Power Range | 3.4 HP – 6.0 HP |
| Displacement Range | 46.2 – 81.0 cm³/rev |
| Refrigerant | R407C |
| Lubricant | PVE Ester Oil |
| Power Supply | 3φ, 380-415V/50Hz, 460V/60Hz |
| Core Positioning | R407C eco-friendly platform; direct upgrade replacement for R22 systems |
二、Model Specifications Table
| Model | Displ. (cm³/rev) | Nominal HP | Cooling Capacity 50Hz (kW) | Input Power (kW) | COP | MCC (A) | LRA (A) | Oil Charge (L) | Net Weight (kg) |
| HRP034T4 | 46.2 | 3.4 | ~10.0 | — | — | 9.5 | 45 | 1.06 | 31 |
| HRP038T4 | 52.5 | 3.8 | ~11.2 | — | — | — | — | 1.06 | 31 |
| HRP040T4 | 54.4 | 4.0 | ~11.8 | — | — | — | — | 1.06 | 31 |
| HRP042T4 | 57.2 | 4.2 | ~12.2 | — | — | 10 | 45 | 1.06 | 31 |
| HRP045T4 | 61.5 | 4.5 | ~12.7 | — | — | — | 50 | 1.33 | 31 |
| HRP047T4 | 64.1 | 4.7 | ~13.1 | — | — | — | — | 1.33 | 31 |
| HRP048T4 | 64.4 | 4.8 | ~13.3 | — | — | — | — | 1.57 | 37 |
| HRP051T4 | 68.8 | 5.0 | ~13.7 | — | — | 13 | 60 | 1.57 | 37 |
| HRP054T4 | 72.9 | 5.4 | 12.57 | 3.97 | 3.17 | 12.5 | 60 | 1.57 | 37 |
| HRP058T4 | 78.2 | 5.8 | ~14.0 | — | — | — | 70 | 1.57 | 37 |
| HRP060T4 | 81.0 | 6.0 | ~14.5 | — | — | 26 | 123 | 1.57 | 37 |
Note: HRP034T4 displacement 46.21 cm³, MCC 9.5 A. HRP042T4 MCC 10 A, LRA 45 A. HRP045T4 LRA 50 A. HRP051T4 MCC 13 A, LRA 60 A, displacement 68.83 cm³. HRP054T4 cooling capacity 12,570 W, input power 3.97 kW, COP 3.17, MCC 12.5 A. HRP060T4 MCC 26 A, LRA 123 A. Maximum working pressure for the entire series: 31.1 bar on the high-pressure side, 26.2 bar on the low-pressure side. IP protection rating: IP22. Speed at 50Hz: 2900 rpm, at 60Hz: 3500 rpm. Suction pipe connection: 7/8 inch, discharge pipe connection: 1/2 inch, ODF brazing connections. Certifications include CE, UL, UKCA.
三、Feature
The HRP series features structural designs specifically matched to the physical properties of R407C. The compressor utilizes Danfoss' flexible scroll compression principle; the orbiting and stationary scrolls are precision-machined from high-strength alloy cast iron, with mating clearances controlled through heat treatment and lapping processes to maintain stable axial and radial sealing even under high-temperature, high-differential pressure conditions. The motor section uses an insulation system resistant to R407C; the stator windings undergo vacuum varnish impregnation to cope with the higher discharge pressure and motor temperature rise associated with R407C. The shell is an integrally cast structure: HRP034 to HRP045 have an outer diameter of 165 mm, while HRP048 to HRP060 have an outer diameter of 184 mm, with integrated vibration-damping mounting feet at the base. The suction and discharge ports use standard ODF brazing tubes (suction 7/8 inch, discharge 1/2 inch) for direct connection to common piping systems.
四、Advantage
1. Native R407C compatibility, no oil change required. The HRP series is factory-charged with PVE ester oil, perfectly matched to R407C in terms of chemical stability and lubricating performance. For projects transitioning from R22 to R407C systems, the HRP series offers a plug-and-play replacement solution, eliminating the need to purchase POE oil separately or modify the lubrication system.
2. Fine displacement gradient covering the complete 3.4 to 6 HP range. Eleven models increment progressively from 46.2 cm³/rev to 81.0 cm³/rev, covering cooling capacities from approximately 10.0 kW to 14.5 kW. From HRP034T4 to HRP060T4, they form a continuous ladder, allowing precise matching based on actual cooling demands during system design, avoiding energy efficiency waste from "oversized" configurations.
3. Unified shell platform reduces system integration costs. HRP034 to HRP045 share a 165 mm outer diameter shell; HRP048 to HRP060 share a 184 mm outer diameter shell. Multiple displacement options are available within the same shell, with consistent mounting bases and interface positions, reducing the variety of outdoor unit casings and simplifying product line management.
4. Built-in multi-protection for high reliability. The entire series comes standard with a built-in motor overload protection module, coordinated with system-level high/low-pressure protection interfaces (requires external pressure switch interlock) for automatic shutdown under abnormal conditions such as overheating, overload, and abnormal high/low pressure. The compact shell and standardized interfaces reduce piping complexity and minimize potential leak points.
五、Benefit (Customer Value)
For equipment manufacturers, the native R407C compatibility of the HRP series means there is no need to design separate lubrication systems or purchase special oils when developing products for markets with environmental regulations—direct upgrades from R22 solutions are possible. The unified 165 mm / 184 mm shell platform allows a single outdoor unit model to cover multiple cooling capacities from 3.4 HP to 6 HP, reducing R&D and testing costs. For engineering integrators, the fine displacement gradient of the 11 models enables more precise system selection, avoiding efficiency losses caused by being forced to choose an oversized compressor due to insufficient capacity options. For end users, the zero-ODP characteristic of R407C systems meets environmental compliance requirements, while the low vibration and low noise operation of scroll compressors is well-suited for the acoustic environment of commercial spaces.
六、Application Scenarios
✅ Small and medium-sized commercial air conditioning units, air-cooled water chillers
✅ Heat pump heating and hot water systems
✅ Process cooling and constant temperature & humidity equipment
✅ R407C air conditioning systems for supermarkets, hotels, and office buildings
✅ Environmental upgrade projects replacing R22 systems
七、Frequently Asked Questions (FAQ)
Q1: What is the difference between the HRP series and the HLM/HCM series?
The HRP series uses R407C refrigerant and PVE ester oil; the HLM/HCM series uses R22 refrigerant and Alkylbenzene oil. While their shell platforms are similar, the internal scroll profiles, motor insulation classes, and lubrication systems differ. HRP cannot be directly charged with R22, and vice versa. Select the corresponding series based on the refrigerant specified in the system design.
Q2: Can the HRP series directly replace compressors in R22 systems?
Cooling capacity matching is only a basic prerequisite. Switching from an R22 system to an R407C system requires simultaneous confirmation of lubricant compatibility (R407C must use POE or PVE oil), system piping cleanliness (mineral oil residue from R22 systems will contaminate R407C systems), and whether expansion valves and drier filters need replacement. While the HRP compressor itself is adapted for R407C, system-level retrofitting must be evaluated as a whole.
Q3: What is the energy efficiency coefficient of the HRP054T4?
The HRP054T4 has a nominal rating of 5.4 HP, a cooling capacity of 12,570 W (42,880 Btu/h), an input power of 3.97 kW, and an energy efficiency coefficient (COP) of 3.17 W/W. The MCC is 12.5 A.
Q4: What is the locked rotor current (LRA) of the HRP series?
The Locked Rotor Current (LRA) varies by model: HRP034T4 is 45 A, HRP042T4 is 45 A, HRP045T4 is 50 A, HRP051T4 is 60 A, HRP058T4 is 70 A, and HRP060T4 is 123 A. During selection, ensure that the power supply circuit and protection switch capacity meet the starting current requirements.
If you need model parameter tables, wholesale quotations, and technical consultations, please feel free to contact us!
三、Feature
