Panasonic CU-HM48BAHU INTERIOS 4 Ton Outdoor Heat Pump

Product Description

The Panasonic INTERIOS CU-HM48BAHU is a 4-ton class outdoor extreme-heat heat pump designed for hybrid heating and cooling applications. It is engineered to work with compatible INTERIOS A-coil indoor units and a new or existing furnace to provide whole-home heating and cooling. The system uses R454B refrigerant and is designed for cold-climate operation down to -22°F (-30°C).

When paired with the CS-HM60BAAU4 A-coil, the CU-HM48BAHU provides a rated cooling capacity of 45,000 BTU/h and a rated heating capacity of 38,000 BTU/h, with operation across a broad temperature range. The outdoor unit features electronic expansion valve control, a rotary compressor, built-in A2L refrigerant sensing, and a base pan designed to support extreme cold-weather operation.

Key Features

• 4-ton class outdoor heat pump for INTERIOS hybrid heating and cooling systems
• Compatible with the CS-HM60BAAU4 INTERIOS A-coil
• 45,000 BTU/h rated cooling capacity when paired with CS-HM60BAAU4
• 38,000 BTU/h rated heating capacity when paired with CS-HM60BAAU4
• Heating capacity of up to 46,000 BTU/h at maximum operating conditions
• Cold-climate heating operation down to -22°F (-30°C)
• R454B refrigerant
• ENERGY STAR Cold Climate system platform
• Rotary compressor
• Electronic expansion valve for refrigerant control
• A2L refrigerant sensor included
• Built-in base pan for cold-weather operation
• Multi-position hybrid A-coil system compatibility
• Maximum piping length up to 246 ft
• Maximum indoor-to-outdoor height difference of 98 ft
• Outdoor airflow up to 3,002 CFM
• Outdoor noise level of approximately 64 dBA

Performance Specifications

• Model: CU-HM48BAHU
• System Type: Hybrid A-Coil Extreme Heat Pump
• Nominal Capacity: 4 Ton Class
• Compatible A-Coil: CS-HM60BAAU4
• Cooling Capacity with CS-HM60BAAU4: 15,500–45,000–47,000 BTU/h (Min/Rated/Max)
• Heating Capacity with CS-HM60BAAU4: 11,500–38,000–46,000 BTU/h (Min/Rated/Max)
• SEER2: 15.8
• EER2: 10.7
• HSPF2 Region IV: 9.4
• HSPF2 Region V: 7.9
• COP: 3.30
• Heating Capacity at 5°F: 42,000 BTU/h
• COP at 5°F: Approximately 1.85
• Refrigerant: R454B

Electrical Specifications

• Outdoor Power Supply: 208/230V, 1 Phase, 60Hz
• Indoor/A-Coil Power: 24V, 1 Phase, 60Hz
• Cooling Input Power: 1,020–3,364–4,520 W (Min/Rated/Max)
• Heating Input Power: 800–3,375–4,540 W (Min/Rated/Max)
• Minimum Circuit Ampacity: 29.0 A
• Maximum Fuse: 30 A
• Outdoor Fan Motor RLA: 2.4 A

Refrigeration & Piping

• Refrigerant: R454B
• Factory Refrigerant Charge: 126.99 oz
• Liquid Pipe: 3/8 in
• Gas Pipe: 3/4 in
• Connection Type: Flared
• Maximum Piping Length: 246 ft
• Maximum Height Difference: 98 ft
• Maximum Pre-Charged Piping Length: 24.6 ft
• Additional Refrigerant: 0.7 oz/ft

Operating Conditions

• Cooling Operating Range: -22°F to 122°F (-30°C to 50°C)
• Heating Operating Range: -22°F to 75°F (-30°C to 24°C)
• Cold Climate Operation: Down to -22°F (-30°C)

Outdoor Unit Specifications

• Outdoor Unit: CU-HM48BAHU
• Dimensions (H × W × D): 38-3/8 × 38-19/32 × 16-5/16 in
• Dimensions (H × W × D): Approximately 975 × 980 × 415 mm
• Outdoor Unit Net Weight: 204 lb
• Outdoor Unit Gross/Carton Weight: 235 lb
• Outdoor Carton Dimensions: 42-5/8 × 45-1/8 × 19-3/4 in
• Outdoor Airflow: 3,002 CFM
• Outdoor Noise Level: 64 dBA

Compatible Indoor Units

• CS-HM60BAAU4
• CS-HM60BAMU3

Hybrid Heating Application

The CU-HM48BAHU is designed for a central ducted hybrid dual-fuel configuration. The heat pump provides heating during cold conditions and cooling during warmer conditions, while the connected furnace can provide supplemental whole-home heating when outdoor temperatures reach extreme cold conditions. Panasonic's INTERIOS hybrid platform is designed for continuous operation down to -22°F (-30°C).

Refrigerant & Safety

The system uses R454B refrigerant and incorporates an A2L refrigerant sensor. Panasonic specifies R454B for the INTERIOS platform and identifies the A-coil system as a cold-climate hybrid heat pump solution with built-in features for installation and service.