I. Series Overview
The ZPD/ZPDT series are hermetically sealed scroll compressors from Copeland featuring Copeland Scroll Digital™ technology. They are widely used in commercial air conditioning, water chillers, Variable Refrigerant Flow (VRF) systems, and refrigeration systems. This series uses environmentally friendly R410A refrigerant and achieves 10%–100% stepless capacity modulation through Digital Scroll technology, covering a power range from 3 HP to 8 HP. It is the ideal choice for commercial projects demanding precise temperature control and high seasonal energy efficiency.
| Series | Technical Features | Main Applications |
| ZPD Series | Digital Scroll technology, single unit, 10%-100% stepless modulation, R410A | Split AC, rooftop units, unitary systems, water chillers |
| ZPDT Series | Digital Scroll Tandem unit, 10%-100% stepless modulation, R410A | Large commercial AC, VRF systems, refrigeration units |
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Common Characteristics: The entire series adopts Copeland Scroll Digital™ technology. By controlling the axial separation and re-engagement of the scroll wraps via a solenoid valve, it achieves 10%–100% stepless capacity modulation. Compared to traditional variable frequency (inverter) technology, Digital Scroll requires no Variable Frequency Drive (VFD), resulting in a simpler system structure and zero electromagnetic interference (EMI) issues.
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Core Differences: The ZPD series consists of single-unit Digital Scroll compressors, covering 3–8 HP. The ZPDT series comprises Digital Scroll Tandem units, consisting of one Digital Scroll compressor and one fixed-speed scroll compressor connected in parallel, delivering a wider cooling capacity range and more flexible capacity modulation.
II. Comprehensive Parameter Comparison Table
(1) ZPD Series — Single-Unit Digital Scroll Compressors
| No. | Model | Nominal HP | Disp. (m³/h) | Disp. (cc/rev) | Power Supply | Refrigerant | Cooling Capacity (W) | Input Power (W) | Current (A) | Weight (kg) |
| 1 | ZPD34KSE-TFM-522 | 3.0 | 5.7 | — | 3φ 380-420V/50Hz | R410A | — | — | 7.0 | 30.9 |
| 2 | ZPD42KSE-TFM-522 | 4.0 | — | — | 3φ 380-420V/50Hz | R410A | — | — | — | — |
| 3 | ZPD51KCE-TFD-* | 4.5 | — | — | 3φ 380-420V/50Hz | R410A | — | — | — | — |
| 4 | ZPD54KSE-TFM-522 | 5.0 | 8.9 | — | 3φ 380-420V/50Hz | R410A | — | — | — | 34.7 |
| 5 | ZPD61KCE-TFD-433 | 5.1 | 10.1 | 58.1 | 3φ 380-420V/50Hz | R410A | 14,800 | 4,930 | 8.5 | 40.3 |
| 6 | ZPD61KCE-TFD-496 | 5.1 | 10.1 | 58.1 | 3φ 380-420V/50Hz | R410A | 14,800 | 4,930 | 8.5 | 40.3 |
| 7 | ZPD61KCE-TFD-522 | 5.1 | 10.1 | 58.1 | 3φ 380-420V/50Hz | R410A | 14,800 | 4,930 | 8.5 | 40.3 |
| 8 | ZPD72KCE-TFD-433 | 6.0 | — | 67.1 | 3φ 380-420V/50Hz | R410A | 17,100 | 5,750 | 9.8 | — |
| 9 | ZPD72KCE-TFD-496 | 6.0 | — | 67.1 | 3φ 380-420V/50Hz | R410A | 17,100 | 5,750 | 9.8 | — |
| 10 | ZPD83KCE-TFD-422 | 8.0 | — | — | 3φ 380-420V/50Hz | R410A | — | — | 16.5 | — |
Notes:
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Power supply for the entire series: 3φ, 380-420V/50Hz; some models are compatible with 460V/60Hz.
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The suffixes for ZPD61KCE (-433, -496, -522) primarily differ in piping connection specifications and electrical configurations; their core performance parameters are identical.
(2) ZPDT Series — Digital Scroll Tandem Units
| No. | Model | Composition | Cooling Capacity Range (BTU) | Power Supply | Refrigerant | EER |
| 1 | ZPDT12M | 1 Digital + 1 Fixed-speed | — | 3φ 380-420V/50Hz | R410A | — |
| 2 | ZPDT14M | 1 Digital + 1 Fixed-speed | — | 3φ 380-420V/50Hz | R410A | — |
| 3 | ZPDT16M | 1 Digital + 1 Fixed-speed | — | 3φ 380-420V/50Hz | R410A | — |
| 4 | ZPDT18M | 1 Digital + 1 Fixed-speed | 147,000–219,000 | 3φ 380-420V/50Hz | R410A | ≤10.85 |
| 5 | ZPDT21M | 1 Digital + 1 Fixed-speed | — | 3φ 380-420V/50Hz | R410A | — |
| 6 | ZPDT24M | 1 Digital + 1 Fixed-speed | — | 3φ 380-420V/50Hz | R410A | — |
| 7 | ZPDT27M | 1 Digital + 1 Fixed-speed | 270,000 | 3φ 380-420V/50Hz | R410A | — |
| 8 | ZPDT31M | 1 Digital + 1 Fixed-speed | — | 3φ 380-420V/50Hz | R410A | — |
| 9 | ZPDT36M | 1 Digital + 1 Fixed-speed | 364,000 | 3φ 380-420V/50Hz | R410A | — |
Notes:
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The ZPDT series consists of Digital Scroll Tandem units, formed by connecting one Digital Scroll compressor and one fixed-speed scroll compressor in parallel via a manifold.
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The numbers in the model names (12/14/16/18/21/24/27/31/36) represent the cooling capacity class; the larger the number, the stronger the cooling capaci
III. Detailed Analysis of Model-Specific Advantages
(1) ZPD Series — Single-Unit Digital Scroll Compressors
ZPD34KSE-TFM-522 (3 HP) — Entry-Level Choice for Small Commercial Digital Scroll
The ZPD34KSE-TFM-522 is the entry-level model in the ZPD series, with a displacement of 5.7 m³/h, maximum operating current of 7.0 A, and weight of 30.9 kg. The power supply is 3-phase 380-420V/50Hz. This model uses R410A refrigerant and is positioned for High Back Pressure (HBP) applications.
As the lowest power model in the ZPD series, the ZPD34KSE-TFM-522, with its moderate 3 HP power and Digital Scroll technology, provides an entry-level solution with precise temperature control and high energy efficiency for small commercial air conditioning, unitary systems, and light commercial refrigeration equipment. Its Digital Scroll technology achieves 10%-100% stepless capacity modulation, effectively avoiding the frequent start-stop cycles of traditional fixed-speed compressors and significantly improving part-load operating efficiency.
ZPD42KSE-TFM-522 (4 HP) — Choice for Medium Commercial Digital Scroll
The ZPD42KSE-TFM-522 is the 4 HP model in the ZPD series, positioned for High Back Pressure (HBP) applications. It uses R410A refrigerant and a 3-phase 380-420V/50Hz power supply. Under conditions of -15°C evaporation / +40°C condensation, the cooling capacity is approximately 4.44 kW.
Compared to the ZPD34KSE, the cooling capacity is increased by approximately 33%. For medium commercial air conditioning, unitary systems, and rooftop units requiring 4 HP class Digital Scroll cooling capacity, the ZPD42KSE-TFM-522 provides more ample cooling reserves while maintaining the core advantages of Digital Scroll technology: precise temperature control and high part-load efficiency.
ZPD51KCE-TFD (4.5 HP) — Upgrade Choice for Higher Capacity
The ZPD51KCE-TFD is the 4.5 HP model in the ZPD series, positioned between the ZPD42KSE and ZPD54KSE. For application scenarios requiring greater capacity than 4 HP but not yet reaching the 5 HP level, the ZPD51KCE-TFD provides a precise capacity matching solution, avoiding the dilemma of "4 HP is not enough, 5 HP is a waste."
ZPD54KSE-TFM-522 (5 HP) — Mainstream Choice for 5 HP Class Digital Scroll
The ZPD54KSE-TFM-522 is the standard 5 HP model in the ZPD series, with a displacement of 8.9 m³/h and a weight of 34.7 kg. It is positioned for High Back Pressure (HBP) applications and uses R410A refrigerant.
5 HP is one of the most mainstream power ratings in the commercial air conditioning sector. With this "golden power" positioning, the ZPD54KSE-TFM-522 has become one of the most demanded models in the market. It is ideal for medium commercial air conditioning, rooftop units, unitary systems, and water chillers requiring standard 5 HP Digital Scroll cooling capacity.
ZPD61KCE-TFD-433 / -496 / -522 (5.1 HP) — High-Efficiency Mainstream for 5.1 HP Class
The ZPD61KCE series is the core mainstream model in the ZPD product line, with a nominal rating of 5.1 HP, displacement of 10.1 m³/h (58.1 cc/rev), cooling capacity of 14,800 W (50,500 BTU/h), input power of 4,930 W, current of 8.5 A, and weight of 40.3 kg. The power supply is 3-phase 380-420V/50Hz.
The three suffixes (-433, -496, -522) have completely identical core performance parameters; the main differences lie in piping connection specifications and electrical configurations to accommodate the matching requirements of different brands and models of equipment.
This model is equipped with Copeland Digital Scroll™ axial and radial compliance technology, ensuring excellent reliability and high efficiency. The energy output can be adjusted down to 10% of the nominal cooling capacity, meeting multiple requirements for precise temperature and humidity control, comfort, and energy saving.
For 5.1 HP class applications such as split air conditioners, rooftop units, unitary systems, water chillers, VRF multi-split systems, and process cooling, the ZPD61KCE series, with its 10%-100% stepless modulation, high part-load efficiency, and simple and reliable control method, becomes the ideal choice for projects pursuing precise temperature control and high seasonal energy efficiency. Fewer start-stop cycles extend compressor life, and the fixed-speed design makes system oil return control simpler.
ZPD72KCE-TFD-433 / -496 (6 HP) — High-Capacity Choice for 6 HP Class Digital Scroll
The ZPD72KCE series is the 6 HP high-capacity model in the ZPD product line, with a displacement of 67.1 cc/rev, cooling capacity of 17,100 W (58,500 BTU/h), input power of 5,750 W, current of 9.8 A, and COP energy efficiency ratio of 2.99 W/W. The power supply is 3-phase 380-420V/50Hz.
Compared to the ZPD61KCE, the cooling capacity is increased by approximately 15.5%, with a significant enhancement in cooling capability. For large commercial air conditioning, rooftop units, and water chillers requiring greater 6 HP class cooling capacity, the ZPD72KCE series provides ample cooling reserves with its 67.1 cc/rev displacement and powerful 17.1 kW cooling capacity. This model is widely used in high-load environments such as commercial refrigeration units, water chillers, and HVAC systems.
ZPD83KCE-TFD-422 (8 HP) — Maximum Power Choice in the ZPD Series
The ZPD83KCE-TFD-422 is the most powerful model in the ZPD series, with a nominal rating of 8 HP and a maximum operating current of 16.5 A. The power supply is 3-phase 380-420V/50Hz. This model is positioned for High Back Pressure (HBP) applications.
As the top product of the ZPD series, the ZPD83KCE-TFD-422, with its maximum 8 HP power, is specifically built for large commercial scenarios with the highest cooling demands. It is suitable for ultra-large cooling demand scenarios such as large commercial air conditioning, rooftop units, water chillers, and industrial cooling. Its Digital Scroll technology ensures that while delivering large cooling output, it can still achieve 10%-100% precise capacity modulation, meeting the precise temperature control and energy-saving needs of large spaces.
(2) ZPDT Series — Digital Scroll Tandem Units
The ZPDT series consists of Copeland Digital Scroll Tandem units, formed by connecting one Digital Scroll compressor and one fixed-speed scroll compressor in parallel via a manifold. This series is positioned for medium and low-temperature commercial refrigeration scenarios, specifically designed for modern supermarkets, cold chain logistics, and catering service facilities pursuing ultimate energy efficiency, long service life, and the lowest total cost of ownership.
Core Technical Features
Features:
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Digital Scroll Tandem Structure: One Digital Scroll compressor + one fixed-speed scroll compressor in parallel.
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Stepless Capacity Modulation: Controls the axial separation of the scroll wraps through a PWM solenoid valve to achieve 10%-100% stepless modulation.
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Axial Compliance Technology: Copeland's patented axial compliance design ensures reliability and high efficiency.
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R410A Environmentally Friendly Refrigerant.
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3-phase 380-420V/50Hz Power Supply.
Advantages:
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Ultra-High Part-Load Efficiency: Precisely matches the load, obtaining extremely high IPLV/NPLV values, significantly reducing actual operating energy consumption.
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Zero Unloading Energy Loss: No energy loss from the VFD at low speeds during part-load operation.
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Soft Start/Stop: Digital modulation provides a soft start, eliminating high inrush current and reducing stress on electrical and mechanical components.
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Wide Operating Range: Maintains high efficiency over a wide range of evaporation and condensation temperatures.
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Low Noise: Smooth and continuous scroll operation reduces cycling start-stops, making the system run quieter.
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Low Voltage Sensitivity: Digital modulation technology is less sensitive to voltage fluctuations than standard VFDs.
Benefits:
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Significant Energy Savings: Greatly reduces the annual operating electricity costs of the refrigeration system.
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Precise Temperature Control: 10%-100% smooth modulation results in minimal temperature fluctuations, enhancing the freshness quality and storage safety of food and pharmaceuticals.
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Extended Equipment Life: Fewer start-stop cycles reduce mechanical wear.
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Easy Installation: No complex VFD board required, high reliability, and minimal harmonic interference to the power grid.
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Low Starting Current: Starts in an unloaded state, minimizing impact on the power grid.
Power Class Description of Each Model
The ZPDT series covers cooling capacity classes from 12 to 36 HP:
| Model | Cooling Capacity Class | Typical Application Scenarios |
| ZPDT12M / 14M / 16M | 12–16 Class | Small/medium supermarket freezers, small cold rooms |
| ZPDT18M | 18 Class | Medium commercial AC, refrigeration units, 147,000–219,000 BTU |
| ZPDT21M / 24M | 21–24 Class | Large supermarket cold chains, medium cold rooms |
| ZPDT27M | 27 Class | Large commercial refrigeration, 270,000 BTU |
| ZPDT31M | 31 Class | Extra-large commercial refrigeration |
| ZPDT36M | 36 Class | Ultra-large commercial refrigeration, 364,000 BTU |
IV. Series-Wide Common Advantages
Features:
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Copeland Scroll Digital™ Technology: Controls the axial separation and re-engagement of the scroll wraps via a solenoid valve to achieve 10%–100% stepless capacity modulation.
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Hermetically Sealed Scroll Structure: Fewer parts, low vibration, low noise.
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R410A Environmentally Friendly Refrigerant: ODP is 0, highly efficient and eco-friendly.
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3-phase 380-420V/50Hz Power Supply: Compatible with 460V/60Hz.
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Axial and Radial Compliance Technology: Ensures excellent reliability and high efficiency.
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POE Ester Oil: The entire series uses ester oil for lubrication.
Advantages:
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Wide Capacity Modulation Range (10%-100%): Quickly responds to load changes, optimizes precise temperature control and comfort.
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High-Efficiency Operation Under Part-Load Conditions: Compared to traditional fixed-speed compressors, part-load energy efficiency is significantly improved.
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Fewer Start-Stop Cycles: Reduces mechanical wear and extends compressor life.
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Fixed-Speed Design: Makes system oil return control simpler.
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Simple and Reliable Control Method: No complex VFD board required, no electromagnetic interference issues.
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Easy to Install, Debug, and Maintain.
Benefits:
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Precise Temperature Control: 10%-100% stepless modulation meets precise temperature and humidity control requirements.
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Significant Energy Savings: High-efficiency part-load operation greatly reduces operating electricity costs.
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High Reliability: Original Copeland quality, compliant scroll design ensures long-term trouble-free operation.
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Easy Installation: Simple system structure, no complex electronic components required.
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Low Maintenance Cost: Fewer start-stop cycles and a simple control system reduce maintenance difficulty.
V. Quick Selection Guide by Application Scenario
| Application Scenario | Recommended Model | HP | Key Advantage |
| Small commercial AC / Unitary system | ZPD34KSE-TFM-522 | 3 HP | Entry-level Digital Scroll, 10%-100% modulation |
| Medium commercial AC / Rooftop unit | ZPD42KSE-TFM-522 | 4 HP | Precise 4 HP match, high part-load efficiency |
| Medium commercial AC | ZPD51KCE-TFD | 4.5 HP | Between 4-5 HP, precise matching |
| Standard 5 HP commercial AC / Chiller | ZPD54KSE-TFM-522 | 5 HP | "Golden power" 5 HP, highest market demand |
| 5.1 HP Split AC / Rooftop / Chiller | ZPD61KCE-TFD-433 | 5.1 HP | 14.8kW capacity, high COP, mainstream choice |
| 5.1 HP Equipment Matching (Interface diff) | ZPD61KCE-TFD-496 | 5.1 HP | Same performance as -433, different interface config |
| 5.1 HP Equipment Matching (Interface diff) | ZPD61KCE-TFD-522 | 5.1 HP | Same performance as -433, different interface config |
| 6 HP Large commercial AC / Chiller | ZPD72KCE-TFD-433 | 6 HP | 17.1kW capacity, high-capacity upgrade |
| 6 HP Large commercial (Interface diff) | ZPD72KCE-TFD-496 | 6 HP | Same performance as -433, different interface config |
| 8 HP Large commercial AC / Industrial cooling | ZPD83KCE-TFD-422 | 8 HP | Maximum power in ZPD series, flagship choice |
| Small/medium supermarket freezer / Small cold room | ZPDT12M/14M/16M | 12-16 Class | Digital Tandem, precise temp control |
| Medium commercial AC / Refrigeration unit | ZPDT18M | 18 Class | 147-219k BTU, EER ≤10.85 |
| Large supermarket cold chain / Medium cold room | ZPDT21M/24M | 21-24 Class | Large capacity Tandem, high IPLV |
| Large commercial refrigeration | ZPDT27M | 27 Class | 270k BTU, extra-large capacity |
| Extra-large commercial refrigeration | ZPDT31M | 31 Class | Ultra-large capacity |
| Ultra-large commercial refrigeration | ZPDT36M | 36 Class | 364k BTU, maximum capacity in ZPDT |
Quick Selection Steps:
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Determine Structure First: For single units, choose the ZPD series; for Tandem units, choose the ZPDT series.
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Determine HP: In the ZPD series: 3HP → ZPD34, 4HP → ZPD42, 4.5HP → ZPD51, 5HP → ZPD54, 5.1HP → ZPD61, 6HP → ZPD72, 8HP → ZPD83.
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Determine Suffix: Different suffixes for ZPD61/ZPD72 (-433/-496/-522) have the same performance but different interface configurations; select based on equipment matching requirements.
VI. Frequently Asked Questions (FAQ)
Q1: What is the difference between the ZPD series and the ZPDT series?
A: The ZPD series consists of single-unit Digital Scroll compressors that operate independently, covering 3–8 HP. The ZPDT series consists of Digital Scroll Tandem units, formed by connecting one Digital Scroll compressor and one fixed-speed scroll compressor in parallel, covering 12–36 classes of cooling capacity, suitable for commercial scenarios with larger cooling demands.
Q2: What are the differences between the suffixes -433, -496, and -522 for ZPD61KCE-TFD?
A: The three suffixes have completely identical core performance parameters (all are 5.1 HP, 14,800W cooling capacity, 58.1 cc/rev displacement). The main differences lie in piping connection specifications and electrical configurations to accommodate the matching requirements of different brands and models of equipment. Please determine the suffix based on the original equipment interface specifications when selecting.
Q3: What is the capacity modulation range of ZPD series compressors?
A: The ZPD series adopts Copeland Scroll Digital™ technology, with a capacity modulation range of 10%–100%, enabling stepless capacity modulation. The energy output can be adjusted down to 10% of the nominal cooling capacity, meeting multiple requirements for precise temperature and humidity control, comfort, and energy saving.
Q4: What are the advantages of the ZPD series compared to inverter compressors?
A: The ZPD series Digital Scroll technology has the following advantages over inverter technology:
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No VFD Required: Simpler system structure, no electromagnetic interference issues.
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Fixed-Speed Design: System oil return control is simpler.
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Soft Start Feature: Starts in an unloaded state, low starting current, minimal impact on the power grid.
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Low Voltage Sensitivity: Less sensitive to voltage fluctuations than standard VFDs.
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High Part-Load Efficiency: Maintains high-efficiency operation within the 10%-100% range.
