MRCOOL Signature Series 4 Ton 14.3 SEER2 R-454B Heat Pump Condenser 208/230V MCAESHS4T4821AA
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The MRCOOL® Signature Series 48k Heat Pump Condenser is a high-capacity, all-season system built to deliver powerful and efficient heating and cooling year-round. With a 14.3 SEER2 and 11.2 EER2 rating, it ensures consistent indoor comfort while helping reduce energy costs.
This model comes pre-charged with R-454B refrigerant, a modern, low-GWP alternative that complies with current environmental standards. It offers reliable performance with a smaller environmental footprint. The factory charge also speeds up installation, reducing labor time for contractors and minimizing hassle for homeowners.
A heavy-duty single-speed scroll compressor sits at the heart of the system, designed to provide steady operation across a wide range of conditions. Inner-groove copper tubing improves heat exchange, boosting system efficiency. Integrated temperature and pressure sensors protect against stress from extreme temperatures, while an intelligent defrost function prevents ice buildup during colder weather.
Despite its large output, the unit operates at a quiet 65 decibels, comparable to a typical dishwasher. A specially designed sound-control top helps reduce operating noise without affecting airflow, making it a good fit for residential areas.
Built for long-term durability, the unit features a steel louver coil guard and wire fan discharge grille to protect internal components from debris and damage.
With compact design, accessible service valves, and a 10-year limited parts warranty and a limited lifetime compressor warranty, the MRCOOL® Signature Series 48k Heat Pump Condenser is a smart investment in year-round comfort and reliability.
Technical Specifications
| Cooling Capacity | 45000 BTU |
| Heating Capacity | 45000 BTU |
| Tonnage | 4 Ton |
| SEER2 | 14.3 |
| EER2 | 11.2 |
| HSPF2 | 7.5 |
| CFM | 4000 |
| Voltage | 208/230 V |
| Phase | 1 |
| Frequency | 60 Hz |
| Max Fuse/Breaker | 50 A |
| Min Circuit Ampacity | 30 A |
| Refrigerant Type | R-454B |
| Refrigerant Volume | 144.6 oz |
| Sound Level | 65 dBA |
| Min Ambient Temp (Cooling) | 59°F |
| Min Ambient Temp (Heating) | 5°F |
| Liquid Line Size | 3/8" |
| Suction Line Size | 3/4" |
| Max Lineset Length | 150 ft |
| Net Dimensions (D×H×W) | 29.14" × 32.875" × 29.14" |
| Net Weight | 223 lbs |
| Gross Dimensions (D×H×W) | 30.3" × 34.8" × 30.3" |
| Gross Weight | 232 lbs |
Certifications
- UL Listed
- CSA Listed
- ETL Listed
- AHRI Certified
Warranty
- 10 Year Parts Warranty
- Limited Lifetime Compressor Warranty
Product Documentation
- MRCOOL Signature Series HP Condenser 4T Installation Manual (PDF)
- MRCOOL Signature Series HP Condenser 4T Warranty Document (PDF)
- MRCOOL Signature Series HP Condenser 4T Brochure (PDF)
- MRCOOL Signature Series HP Condenser 4T AHRI Certification (PDF)
- MRCOOL Signature Series HP Condenser 4T Energy Guide (PDF)
WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.