Daikin 4 Ton 14.3 SEER2 Heat Pump and Multi-Positional Air Handler System | 208/230V 3 Phase - R32 - Single Stage

Reliable Year-Round Comfort with a 4-Ton Commercial Split Heat Pump System for Light Commercial Applications

The Daikin DH4SEA4830 / AMST48CU1300 is a nominal 4-ton split heat pump system designed to provide year-round heating and cooling for suitable ducted applications. Combining the DH4SEA4830 outdoor heat pump with the AMST48CU1300 multi-position indoor air handler, this system features a high-efficiency Copeland scroll compressor, R-32 refrigerant, and a nine-speed electronically commutated motor (ECM) blower. The outdoor unit operates on 208/230V, three-phase power, while the indoor air handler operates on 208/230V, single-phase power. Designed for flexible installation and ducted air distribution, this equipment combination supports commercial comfort when properly selected, installed, and commissioned according to Daikin's technical requirements.

Key Benefits

• Energy-Efficient Performance – The DH4SEA4830 has published ratings of 14.3 SEER2, 12.5 EER2, and 7.8 HSPF2 to support efficient heating and cooling operation.
• Year-Round Heat Pump Heating – Reversible heat pump technology provides heating and cooling through one outdoor unit, reducing the need for separate primary heating and cooling equipment.
• 4-Ton Cooling Capacity – The outdoor unit provides a rated cooling capacity of 48,000 BTU/h under specified test conditions to serve appropriately sized applications.
• Nine-Speed ECM Blower – The AMST48CU1300 features a direct-drive, nine-speed ECM blower motor that provides multiple airflow settings for ducted applications.
• Multi-Position Installation – The indoor air handler supports approved horizontal and vertical configurations for flexible equipment placement.
• Ducted Air Distribution – The indoor air handler connects to compatible ductwork to distribute conditioned air throughout the served space.
• Copeland Scroll Compressor – The outdoor unit incorporates scroll compressor technology and CoreSense technology to support dependable operation and compressor protection.
• Factory-Installed TXV – The indoor air handler's thermal expansion valve helps regulate refrigerant flow during heating and cooling operation.
• Service-Friendly Design – Accessible refrigerant service valves, gauge ports, and integrated pressure switches help facilitate inspection and maintenance.

Heat Pump Heating for Year-Round Comfort

The Daikin DH4SEA4830 provides a rated heating capacity of 48,000 BTU/h under specified test conditions. Its single-stage Copeland scroll compressor supports reversible heat pump operation, transferring heat into the indoor space during heating mode. The outdoor unit has a published HSPF2 rating of 7.8, supporting efficient heating under appropriate operating conditions. Its specified outdoor heating operating range extends from -20°F to 70°F, subject to the manufacturer's operating requirements and installation conditions. Supplemental electric heat may be provided through a compatible field-installed heater kit for the AMST48CU1300 when required. Heater-kit compatibility, electrical requirements, airflow settings, and auxiliary heat controls must be verified against Daikin's installation documentation.

4-Ton Cooling Performance for Commercial Comfort

The DH4SEA4830 outdoor heat pump delivers a rated cooling capacity of 48,000 BTU/h under specified test conditions. Its high-efficiency Copeland scroll compressor and enhanced aluminum fin coil with 7 mm diameter copper tubing are designed to support heat transfer and dependable cooling operation. The outdoor unit has published efficiency ratings of 14.3 SEER2 and 12.5 EER2. Its specified cooling operating range is 55°F to 125°F outdoor dry-bulb temperature. Actual cooling capacity and efficiency depend on the matched indoor equipment, indoor airflow, installation conditions, refrigerant charge, and operating environment.

Energy Efficiency and Refrigeration Technology

The DH4SEA4830 incorporates a high-efficiency Copeland scroll compressor and advanced CoreSense technology. Standard outdoor-unit components include a factory-installed bi-flow liquid-line filter drier, suction-line accumulator, compressor crankcase heater, high-capacity muffler, and high- and low-pressure switches. Time-delay technology supports reliable defrost operation during heating. The outdoor unit uses R-32 refrigerant and is factory charged for 15 feet of refrigerant tubing, with additional charge adjustments required according to actual piping length and the manufacturer's installation instructions. The AMST48CU1300 complements the outdoor unit with a factory-installed thermal expansion valve, an all-aluminum evaporator coil with high-performance coated fin stock, and a direct-drive, nine-speed ECM blower motor. These components support refrigerant management, heat transfer, and flexible indoor airflow.

Split-System Design for Flexible Installation

The split-system configuration separates the DH4SEA4830 outdoor heat pump from the AMST48CU1300 indoor air handler, providing flexibility in equipment placement and duct routing. The outdoor unit features sweat-connection refrigerant service valves with accessible gauge ports, a 3/8-inch liquid-line connection, and a 1-1/8-inch suction-line connection. It is factory charged for 15 feet of refrigerant tubing, with additional refrigerant charge determined according to the installation instructions and actual piping length. The AMST48CU1300 features a 21-inch-wide cabinet, a 21-inch cabinet depth, and a nominal 4-ton capacity. Its multi-position design supports approved horizontal and vertical installations. Refrigerant piping, electrical connections, installation clearances, and equipment matching must comply with the applicable Daikin installation instructions.

Controls and Indoor Comfort

The system requires compatible heat pump controls and a suitable thermostat selected for the installed equipment configuration. The AMST48CU1300 features a direct-drive, nine-speed ECM blower motor that provides multiple airflow settings for ducted air distribution. Its factory-installed thermal expansion valve regulates refrigerant flow, while the all-aluminum evaporator coil supports heat transfer during cooling and heat pump operation. Compatible field-installed electric heat kits are available for supplemental heating where required. Thermostat selection, blower settings, auxiliary heat operation, heater-kit compatibility, and system wiring must be verified against the manufacturer's instructions for the approved equipment combination.

Commercial and Ducted Applications

The Daikin DH4SEA4830 / AMST48CU1300 provides a nominal 4-ton heating and cooling solution for appropriately sized ducted applications. Potential applications include small offices, retail spaces, and other suitable commercial or light commercial areas where equipment capacity, duct design, electrical supply, and installation requirements meet project specifications. The DH4SEA4830 operates on 208/230V, 60 Hz, three-phase power, with a minimum circuit ampacity of 16.5 A and a maximum overcurrent protection rating of 25 A. The AMST48CU1300 operates on a separate 208/230V, single-phase electrical supply, with a minimum circuit ampacity of 7.1 A and a maximum overcurrent protection rating of 15 A. Each unit must be connected according to its own nameplate and installation instructions. Proper system sizing, duct design, airflow configuration, and installation by qualified HVAC professionals are essential for reliable operation.

Serviceability and Maintenance

The DH4SEA4830 includes refrigerant service valves with accessible gauge ports, high- and low-pressure switches, a factory-installed liquid-line filter drier, and a suction-line accumulator to support refrigeration-system protection and servicing. Its compressor crankcase heater and time-delay defrost technology provide additional operational safeguards. The outdoor unit features a removable grille-style top, a rust-resistant steel louvered coil guard, and service access to internal components. The AMST48CU1300 features a repositionable coil mounting track, tool-less filter access, a factory-installed TXV, and an all-aluminum evaporator coil. Its factory-installed R-32 refrigerant sensor is designed for the service life of the coil. Routine maintenance should include inspection and cleaning of air filters and coils, condensate drainage checks, inspection of electrical connections, and refrigerant-system checks by qualified HVAC personnel in accordance with Daikin's maintenance recommendations.

Warranty

The Daikin DH4SEA commercial heat pump series includes a 5-Year Parts Limited Warranty under the applicable warranty terms. The AMST R-32 air handler series offers a 12-Year Parts Limited Warranty when the applicable online registration requirements are satisfied within 60 days of installation. Warranty eligibility, registration requirements, coverage duration, and exclusions depend on the applicable product warranty certificate and installation conditions. Confirm warranty coverage for both models and verify that the equipment combination meets manufacturer requirements before purchase and installation. Refer to Daikin's official warranty documentation for complete terms and conditions.

Recommended Accessories

• Compatible Heat Pump Thermostat – Select a thermostat approved for the verified heat pump and indoor air handler configuration.
• Compatible Electric Heat Kit – Select a heater kit specifically approved for the AMST48CU1300 if supplemental electric heating is required.
• Outdoor Equipment Pad or Mounting Support – Choose a support suitable for the outdoor unit's dimensions, weight, and installation location.
• Electrical Disconnect and Overcurrent Protection – Select components according to each unit's nameplate, installation instructions, and applicable electrical codes.
• Refrigerant Line Set and Duct Transitions – Size and select components according to the approved equipment combination, refrigerant piping requirements, and site-specific duct design.

Dependable Heating and Cooling with the Daikin DH4SEA4830 / AMST48CU1300

Support year-round indoor comfort with the Daikin DH4SEA4830 / AMST48CU1300 split heat pump system. Combining a nominal 4-ton outdoor heat pump, Copeland scroll compressor technology, R-32 refrigerant, and a multi-position indoor air handler with nine-speed ECM airflow, this system offers a flexible ducted heating and cooling solution for suitable commercial applications.