Durastar Multi-Zone Heat Pump Outdoor Unit

Key Information

This installation manual is designed for professionals and covers a range of Durastar outdoor unit models, including the DRA3U18M2A, DRA3H18M2A, DRA4U28M2A, DRA4H28M2A, DRA5U36M2A, DRA5H36M2A, DRA6U48M2A, DRA6H48M2A, DRA6U60M2A, and DRA6H55M2A, all utilizing R-454B refrigerant and operating on 208/230V, 1ph, 60 Hz power.

The document emphasizes safety, detailing warnings and cautions related to electrical hazards, refrigerant handling (specifically A2L), and proper installation practices. It includes sections on:

• Important Safety Precautions
• Specification Overview
• Operating Temperatures
• Installation Steps
• Refrigerant Piping Connections
• System Evacuation
• Troubleshooting
• Wiring Diagrams

Safety First

Durastar prioritizes user safety. The manual highlights the importance of qualified personnel performing installations and maintenance. Key safety points include:

• Always disconnect power before servicing.
• Never bypass safety features.
• Handle refrigerants with extreme care, following all regulations for A2L refrigerants.
• Ensure proper ventilation during installation and operation.

For further assistance or warranty service, Durastar customer service can be reached via email at QUESTIONS@DURASTAR.COM or by phone at 1-888-320-0706. More information and product guides are available at DURASTAR.COM.

Technical Details

The manual provides detailed specifications for each model, including BTUH capacity, pipe sizes, net weight, and outdoor unit dimensions. It also outlines the required room height and minimum room area based on refrigerant charge, adhering to R454B UL guidelines.

Specific sections address the calculation of releasable charge (MREL) for various indoor units and line set lengths, as well as the function of safety shut-off valves.