I. Positioning
The Large-Capacity Group is Copeland's ZB series product line of scroll compressors designed for 9–13 HP medium-high temperature refrigeration applications. Covering four capacity grades—ZB66, ZB76, ZB88, and ZB95—it offers dual oil options: KQ (mineral oil/R22) and KQE (POE ester oil/R404A/R134a). This group features large cooling capacity starting from 9 HP, a large 3.25L oil charge, and an advanced ASTP protection system as its core characteristics, making it the core power choice for large cold storage, food processing refrigeration, cold chain logistics transfer warehouses, industrial refrigeration equipment, and other scenarios.
| Feature Dimension | Description |
| Power Range | 9.0 HP – 13.0 HP |
| Refrigerant | R22 (KQ) / R404A, R507, R134a (KQE) |
| Power Supply | 3-Phase 380-420V/50Hz (compatible with 460V/60Hz) |
| Application Condition | Medium-high temp refrigeration, evaporation temp -25℃ to +15℃ |
| Core Positioning | Mainstream for large cold storage, high cooling capacity, high reliability |
II. Full Series Parameter Comparison Table
Note: 50Hz operating condition. Cooling capacity based on R404A/R507 (KQE) or R22 (KQ).
| No. | Model | Nominal HP | Displacement (m³/h) | Displacement (cc/rev) | Oil Charge (L) | Oil Type | Net Weight (kg) |
| 1 | ZB66KQ | 9.0 | 25.7 | 142.9 | 3.25 | Mineral | 59 |
| 2 | ZB66KQE | 9.0 | 25.7 | 142.9 | 3.25 | POE | 59 |
| 3 | ZB76KQ | 10.0 | 28.8 | 167.1 | 3.25 | Mineral | 62 |
| 4 | ZB76KQE | 10.0 | 28.8 | 167.1 | 3.25 | POE | 62 |
| 5 | ZB88KQ | 12.0 | 33.2 | 190.9 | 3.25 | Mineral | 62 |
| 6 | ZB95KQ | 13.0 | 36.4 | 209.1 | 3.3 | Mineral | 62 |
Additional Model Notes: -
ZB66KQE-TFD: Displacement 142.9 cc/rev, oil charge 3.25 L, net weight 59 kg. Compatible with R134a/R404A/R507.
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ZB76KQE-TFD: Displacement 167.1 cc/rev, oil charge 3.25 L, net weight 62 kg.
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ZB88KQ-TFD: Displacement 190.9 cc/rev, oil charge 3.25 L, net weight 62 kg.
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ZB95KQ-TFD: Displacement 209.1 cc/rev, oil charge 3.3 L, net weight 62 kg. Locked rotor current 133-140A, max running current 28.2A.
Motor Protection Configuration (KQE Series): ZB66KQE, ZB76KQE, ZB88KQ, and ZB95KQ are all equipped with ASTP (Advanced Scroll Temperature Protection) discharge temperature protection device. This device installs a temperature-sensing quick-acting disc inside the scroll compressor, which activates when the discharge temperature overheats to protect the compressor.
⚠️ Important Note: The ZB58KQ and above series do NOT have a built-in Internal Pressure Relief (IPR) valve. For safe operation, a high-pressure switch with a set pressure not exceeding 30 bar (gauge pressure) MUST be installed in the system for all applications.
III. Detailed Explanation
Feature – Technical Characteristics
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The Large-Capacity Group adopts Copeland's ASTP (Advanced Scroll Temperature Protection) system. When discharge overheating occurs, the ASTP's temperature-sensing quick-acting disc separates the scrolls upon reaching the set temperature, stopping suction and discharge. The motor protector then trips to prevent compressor damage.
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ASTP reset typically takes a long time, potentially over 1 hour, depending on the internal heat of the compressor and heat dissipation efficiency.
Advantage – Technical Advantages
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The core advantages of this group are its large 3.25–3.3L oil charge and large displacement of 142.9–209.1 cc/rev, ensuring lubrication reliability and cooling output stability during long-term continuous operation in large cold storage.
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The upper main bearing and drive bearing use DU bearings made of porous bronze + PTFE (Polytetrafluoroethylene) coating, allowing extended operation even under less-than-ideal lubrication conditions with minimal friction coefficient.
Benefit – User Benefits
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For applications such as large cold storage, food processing refrigeration, cold chain logistics transfer warehouses, and industrial refrigeration equipment, this group ensures safety and reliability during long-term continuous operation through its complete 9–13 HP power coverage and ASTP protection system.
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The large oil charge reduces lubrication oil change frequency and maintenance costs. The compact 59–62 kg design significantly reduces weight compared to semi-hermetic compressors of the same cooling capacity, lowering equipment integration difficulty.
IV. Application Quick Selection Guide
| Application Scenario | Recommended Model | HP | Refrigerant |
| Large cold storage (50–100m³) | ZB66KQE | 9.0 | R404A/R134a |
| Food processing refrigeration rooms | ZB76KQE | 10.0 | R404A/R507 |
| Cold chain logistics transfer warehouses | ZB88KQ | 12.0 | R22 |
| Industrial refrigeration equipment | ZB95KQ | 13.0 | R22 |
Why Choose Copeland ZB Large-Capacity Group for Your Next Project?
Unlike standard compressors, the ZB66–ZB95 series is engineered for demanding, continuous-operation environments. With advanced ASTP protection technology and a large 3.25L oil reservoir, you get unmatched reliability and lower maintenance costs.
Ready to upgrade your cold chain equipment? Contact us today for a competitive quote and lead time. Let's power your refrigeration systems with the industry's most trusted scroll technology.
Additional Model Notes: 
Why Choose Copeland ZB Large-Capacity Group for Your Next Project?
