Parallel Rack Semi Hermetic Condensing Unit 4NES-20Y-PR
Multi-compressor parallel rack design with built-in redundancy—if one compressor requires service, the others maintain cooling for uninterrupted cold storage operation.
30600W @ -25°C
Cooling Capacity
R22/R404a/R507
Refrigerant
380V/3PH/50Hz
Power Supply
Product Introduction
The 4NES-20Y-PR is a premium Semi Hermetic Condensing Unit engineered by KUB Refrigeration Equipment Co., Ltd, designed to deliver exceptional cooling performance for commercial and industrial cold storage applications. This unit integrates a high-efficiency semi hermetic reciprocating compressor with a perfectly matched air-cooled condenser, providing a compact yet powerful refrigeration solution.
Manufactured in Shanghai, China, with over 20 years of refrigeration engineering expertise, the 4NES-20Y-PR combines advanced compressor technology with robust construction to ensure long-term reliable operation. Every unit undergoes rigorous factory testing including pressure tests, electrical safety checks, and performance validation before shipment.
Features & Characteristics
- High-Efficiency Semi Hermetic Compressor: Serviceable reciprocating design with precision-machined components for extended service life and easy field maintenance.
- Optimized Condenser Design: High-efficiency finned tube condenser with large-diameter axial fans delivers superior heat rejection and stable condensing pressure.
- Multi-Layer Safety Protection: Integrated controller with phase loss/sequence protection, high/low pressure cutouts, oil pressure safety switch, and motor overload protection.
- Wide Refrigerant Compatibility: Engineered to operate with multiple refrigerants, providing flexibility for different regional requirements and application needs.
- Low Vibration Operation: Optimized mass balance design with vibration isolation mounts ensures quiet, stable operation suitable for various installation environments.
- Factory Pre-Charged & Tested: Pre-wired control panel, pre-piped connections, and comprehensive factory testing minimize on-site installation time.
- Weather-Resistant Construction: Durable powder-coated steel frame and weather-protected electrical enclosure suitable for indoor and sheltered outdoor installation.
- Energy-Efficient Motor: High-efficiency motor with broadband characteristics delivers optimal performance at both full-load and part-load conditions.
Why Choose KUB?
- 20+ Years of Expertise: KUB has specialized in refrigeration equipment manufacturing since 2000, serving customers in over 30 countries worldwide.
- Rigorous Quality Control: Every unit undergoes comprehensive factory testing including pressure tests, electrical safety verification, and full-load performance runs.
- Global Certifications: Our products meet CE standards and comply with international refrigeration safety and performance requirements.
- One-Year Comprehensive Warranty: Full coverage on manufacturing defects with responsive after-sales support and readily available spare parts.
- Customization Capability: Our engineering team can customize units to meet specific voltage, refrigerant, and application requirements.
- Competitive Value: Factory-direct pricing with premium component quality delivers exceptional return on investment for cold storage operators.
- Fast Global Shipping: Efficient logistics network ensures timely delivery to ports worldwide with professional export packaging.
Technical Specifications
| Parameter | Specification |
|---|
| Model | 4NES-20Y-PR |
| Configuration | 3-Compressor Parallel Rack |
| Compressors | 4NES-14Y * 2 + 4PES-12Y * 1 |
| Total Horsepower | 20HP |
| Individual HP | 12HP * 2 + 12HP * 1 |
| Power Supply | 380V/3PH/50Hz |
| Evaporating Temp Range | -25°C to +5°C |
| Cooling Capacity @ -25°C | 30600W |
| Cooling Capacity @ -15°C | 42880W |
| Refrigerant | R22 / R404a / R507 |
| Condenser | Air Cooled, 4 * 400mm Axial Fans |
| Capacity Control | Staged (33%/66%/100% via compressor cycling) |
| Control System | Microprocessor with LCD Display |
| Oil Management | Individual Oil Separators + Common Reservoir |
| Suction Header | 54mm (2-1/8") |
| Liquid Header | 28mm (1-1/8") |
| Net Weight | 520kg |
| Dimensions (L*W*H) | 2200 * 1100 * 1600mm |
| Certification | CE |
| Warranty | 1 Year |
Applications
Designed for large cold storage warehouses, food processing and distribution centers, supermarket rack systems, industrial plants with 24/7 cooling demands, and any facility requiring scalable, redundant refrigeration with zero tolerance for downtime.
Frequently Asked Questions
Q: How does the redundancy feature work?
A: The rack has 3 independent compressors on a common frame. If one compressor requires maintenance, the remaining 2 continue operating at reduced capacity, ensuring your cold storage stays cold while repairs are made.
Q: How is capacity controlled?
A: The microprocessor controller stages compressors on/off based on suction pressure. At low load, only 1 compressor runs (33%). As load increases, additional compressors start automatically (66%, then 100%).
Q: Can additional compressors be added later?
A: The rack frame and piping headers can accommodate additional compressor positions. Contact our engineering team for expansion possibilities based on your specific rack configuration.
Q: Is the rack factory assembled and tested?
A: Yes, every parallel rack is fully assembled, piped, wired, pressure-tested, and run-tested under load at our factory before shipment. This minimizes on-site installation time and commissioning risk.
Q: What maintenance is required?
A: Routine maintenance includes oil level checks, filter-drier replacement, condenser coil cleaning, and electrical connection inspection. We provide a comprehensive maintenance schedule and spare parts list with each unit.
Packaging & Shipping
- Packaging: Export-standard plywood case/pallet with moisture-proof wrapping and reinforced corner protection.
- Shipping Port: Shanghai/Ningbo, China
- Delivery Time: 15-25 working days after order confirmation, depending on configuration and quantity.
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