Midea MRC Heat Pump Rooftop Unit 7.5-30 Ton Vapor Compression HVAC System
Thermodynamic engineering meets real-world demands with dual-mode climate control architecture for commercial applications.
Product Overview
The Midea MRC Heat Pump Rooftop Unit represents a mature vapor compression system designed for dual-mode heating and cooling operation in commercial applications. This thermodynamic system employs a scroll compressor-based vapor compression cycle with electronic expansion valve metering for reliable year-round climate control.
In cooling mode, the refrigeration circuit transfers heat from the indoor air stream to the outdoor environment through the condensing coil. In heating mode, a reversing valve redirects refrigerant flow, extracting thermal energy from ambient air and delivering it to the conditioned space - achieving heating coefficients of performance significantly higher than resistance heating alternatives.
The system achieves EER ratings of 10.2-11.3 Btu/h*W through optimized component matching, precise refrigerant charge management, and heat exchanger geometry designed to minimize approach temperatures.
Key Technical Features
Scroll Compression Architecture
Employs scroll compressors from international manufacturers (Copeland, Hitachi, Danfoss) with interleaved spiral elements for continuous compression. This technology generates minimal pressure pulsations, reducing vibration and acoustic emissions while maintaining efficiency across variable load conditions.
Heat Exchange Architecture
Features optimized heat exchanger geometry with multi-circuit tube-in-fin construction and staggered louvered fins. The indoor coil maintains uniform surface temperatures while the outdoor coil utilizes larger tube diameters and enhanced fin geometries for higher air-side temperature differences.
Electronic Expansion Valve Metering
Utilizes electronic expansion valves with stepper motor control for precise refrigerant flow management. The system implements adaptive superheat algorithms to optimize performance across varying load conditions and ambient temperatures.
Dual-Mode Reversing Valve System
Four-way valve assembly enables heat pump capability by redirecting refrigerant flow between cooling and heating cycles. Validated for reliable operation across thousands of mode transition cycles.
Enhanced Corrosion Protection
Multi-layer protection system includes G90 galvanized steel structural enclosure, enhanced chemical conversion coatings on heat exchanger coils, and dual-sided conformal coating on printed circuit boards for extended service life in demanding environments.
Operating Envelope Engineering
Operates across cooling envelope of 10°C to 46°C and heating envelope of -9°C to 24°C. Component selection and control strategies are calibrated for specific pressure-temperature relationships within these operational ranges.
Factory Quality Assurance
Every unit undergoes 100% factory run testing including complete refrigerant circuit operation, compressor current verification, airflow measurement, and control system functional testing under ISO 9001, ISO 14001, and OHSAS 18001 certified management processes.
Applications
- Commercial Office Buildings - Multi-floor complexes requiring simultaneous heating and cooling
- Retail Commercial Spaces - Large-format retail with variable occupancy-driven load profiles
- Warehouse & Distribution Facilities - Climate control for temperature-sensitive storage
- Hospitality Properties - Hotels and resorts requiring reliable year-round climate control
- Educational Campuses - Schools and universities with diverse building types
- Healthcare Facilities - Climate stability for patient care areas and medical equipment
- Light Industrial Manufacturing - Process temperature control and ambient climate management
- Mixed-Use Developments - Properties combining retail, office, and residential functions
Certifications & Standards
- ISO 9001:2015 - Quality Management System
- ISO 14001:2015 - Environmental Management System
- OHSAS 18001:2007 - Occupational Health and Safety Management System
- 500-Hour Salt Spray Test (ASTM B117) - Accelerated corrosion testing
- G90 Galvanized Steel (ASTM-A-653) - Material specification compliance
- 100% Factory Run Testing Protocol - Comprehensive operational testing
Technical Specifications
| Model |
Nominal Ton |
Cooling Capacity |
Power Input |
EER |
Heating Capacity |
| MRC-075HWN1-R(C) |
7.5 RT |
89,000 Btu/h (26.0 kW) |
7.9 kW |
11.3 |
103,000 Btu/h |
| MRC-100HWN1-R(C) |
10 RT |
120,000 Btu/h (35.0 kW) |
10.7 kW |
11.2 |
137,000 Btu/h |
| MRC-125HWN1-R(C) |
12.5 RT |
150,000 Btu/h (44.0 kW) |
13.3 kW |
11.3 |
154,000 Btu/h |
| MRC-150HWN1-R(C) |
15 RT |
180,000 Btu/h (53.0 kW) |
16.7 kW |
10.8 |
191,000 Btu/h |
| MRC-175HWN1-R(C) |
17.5 RT |
208,000 Btu/h (61.0 kW) |
19.1 kW |
10.9 |
218,000 Btu/h |
| MRC-200HWN1-R(C) |
20 RT |
240,000 Btu/h (70.0 kW) |
22.6 kW |
10.6 |
260,000 Btu/h |
| MRC-250HWN1-R(C) |
25 RT |
300,000 Btu/h (88.0 kW) |
28.9 kW |
10.4 |
330,000 Btu/h |
| MRC-300HWN1-R(C) |
30 RT |
335,000 Btu/h (98.0 kW) |
32.8 kW |
10.2 |
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Engineering Specifications
Power Supply: 380-415V 3N~ 50Hz
Compressor Type: Scroll (Copeland/Hitachi/Danfoss)
Refrigeration Cycle: Vapor compression with EEV metering
Heat Exchange: Multi-circuit tube-in-fin coils
Cooling Operating Range: 10°C to 46°C ambient
Heating Operating Range: -9°C to 24°C ambient
Refrigerant: R410A (factory charged)
Corrosion Protection: G90 steel, enhanced coil coating, dual PCB coating
Testing Protocol: 100% factory run test
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