Daikin 3 Ton 13.4 SEER2 Heat Pump and Multi-Positional Air Handler System | 208/230V 3 Phase - R32 - Single Stage

Reliable Year-Round Comfort with a 3-Ton Commercial Split Heat Pump System for Light Commercial Applications

The Daikin DH4SEA3630 / AMST36BU1300 is a nominal 3-ton split heat pump system designed to provide year-round heating and cooling for suitable ducted applications. Combining the DH4SEA3630 36,000 BTU/h outdoor heat pump with the AMST36BU1300 multi-position indoor air handler, this system features a single-stage Copeland scroll compressor, R-32 refrigerant, and a nine-speed electronically commutated motor (ECM) blower to support dependable comfort and flexible installation. The outdoor unit operates on 208/230V three-phase power, while the indoor air handler operates on 208/230V single-phase power. Final equipment compatibility and matched-system performance should be confirmed using Daikin's approved technical documentation.

Key Benefits

• Energy-Efficient Performance – The DH4SEA3630 has a rated efficiency of 13.4 SEER2 and 12.5 EER2, with a rated HSPF2 of 7.5, helping 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.
• Dependable Cooling Capacity – The outdoor unit offers a nominal 36,000 BTU/h capacity, with a rated cooling capacity of 35,000 BTU/h under specified test conditions.
• Nine-Speed ECM Blower – The AMST36BU1300's direct-drive ECM motor provides multiple airflow settings to accommodate system requirements.
• Flexible Installation – The multi-position air handler supports approved vertical and horizontal installation configurations for adaptable equipment placement.
• Ducted Air Distribution – The indoor air handler connects to a compatible duct system to distribute conditioned air throughout the served space.
• Advanced Compressor Technology – The Copeland scroll compressor and CoreSense technology support dependable operation and compressor protection.
• Refrigerant Flow Control – The indoor air handler features a factory-installed thermal expansion valve (TXV) for refrigerant flow control during heating and cooling operation.
• Service-Friendly Components – Accessible outdoor service valves, gauge ports, and built-in pressure protection features help facilitate system inspection and maintenance.

Reliable Heat Pump Heating for Year-Round Comfort

The Daikin DH4SEA3630 provides nominal 36,000 BTU/h heating capacity, with a rated heating capacity of 36,000 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 DH4SEA3630 has a rated HSPF2 of 7.5, helping provide an efficient alternative to conventional electric resistance heating under appropriate operating conditions. The outdoor unit's specified heating operating range extends from -20°F to 70°F outdoor dry-bulb temperature, subject to the manufacturer's operating requirements and installation conditions. Supplemental electric heat may be provided through a compatible field-installed heater kit where required. Heater selection, wiring, and controls must follow the approved indoor unit documentation.

3-Ton Cooling Performance for Commercial Comfort

The DH4SEA3630 outdoor heat pump delivers nominal 36,000 BTU/h cooling capacity, equivalent to 3 tons, with a rated cooling capacity of 36,000 BTU/h under the manufacturer's specified test conditions. Its single-stage Copeland scroll compressor and enhanced aluminum fin coil with 5 mm diameter copper tubing are designed to support efficient heat transfer and dependable cooling operation. The model has a rated efficiency of 13.4 SEER2 and 12.5 EER2. The specified cooling operating range is 55°F to 125°F outdoor dry-bulb temperature. Actual system performance depends on the matched indoor equipment, installation conditions, airflow, refrigerant charge, and operating environment.

Energy Efficiency and Refrigeration Technology

The DH4SEA3630 combines a high-efficiency Copeland scroll compressor with CoreSense technology and a refrigeration circuit designed for dependable operation. Factory-installed components include a 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. The AMST36BU1300 complements the outdoor unit with a factory-installed TXV, an all-aluminum evaporator coil with coated fin stock, and a nine-speed ECM blower motor. The DH4SEA3630's published ratings are 13.4 SEER2, 12.5 EER2, and 7.5 HSPF2; these values should be distinguished from any separately certified rating for the complete matched equipment combination.

Split-System Design for Flexible Installation

The split-system configuration separates the DH4SEA3630 outdoor heat pump from the AMST36BU1300 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 7/8-inch suction-line connection. Daikin specifies a factory refrigerant charge for 15 feet of tubing, with additional charge adjustments required according to the installation instructions and actual piping length. The AMST36BU1300 features a 17.5-inch-wide cabinet, a nominal 3-ton capacity, and multi-position installation capability. Its R-32-compatible design includes a factory-installed refrigerant sensor. Refrigerant piping, electrical connections, clearances, and equipment matching must comply with the applicable Daikin installation instructions and approved system configuration.

Controls and Indoor Comfort

The system uses compatible heat pump controls and a suitable thermostat selected for the installed equipment configuration. The AMST36BU1300 features a direct-drive, nine-speed ECM blower motor to provide multiple airflow settings for ducted air distribution. Its factory-installed TXV regulates refrigerant flow, while the all-aluminum evaporator coil supports heat transfer during cooling and heat pump operation. Compatible field-installed electric heat kits can provide supplemental heating when required. Thermostat selection, auxiliary heat operation, blower settings, and electrical connections must be verified against the manufacturer's instructions for the exact equipment combination.

Commercial and Ducted Applications

The Daikin DH4SEA3630 / AMST36BU1300 combination provides nominal 3-ton heating and cooling capacity for appropriately sized ducted applications. Potential applications include small offices, retail spaces, and other suitable conditioned areas where the required capacity, electrical supply, ventilation, ductwork, and equipment configuration meet project requirements. The DH4SEA3630 operates on 208/230V three-phase power, with a minimum circuit ampacity of 14.2 A and a maximum overcurrent protection rating of 20 A. The AMST36BU1300 operates on 208/230V single-phase power, with a minimum circuit ampacity of 5.6 A and a maximum overcurrent protection rating of 15 A. These electrical requirements apply to the respective units and must be verified against their nameplates and installation documentation. The proposed pairing should be confirmed as an approved combination before installation.

Serviceability and Maintenance

The DH4SEA3630 includes 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 AMST36BU1300 features a repositionable coil mounting track to accommodate approved installation configurations, along with a factory-installed R-32 sensor 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 verification of refrigerant-system operation by qualified 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 commercial warranty terms. The AMST R-32 air handler series includes a 12-Year Parts Limited Warranty when the applicable online registration requirements are satisfied within 60 days of installation. Warranty eligibility, registration requirements, coverage conditions, and exclusions depend on the specific equipment and applicable warranty documentation. Because the outdoor heat pump and indoor air handler belong to different product categories, confirm the warranty terms and approved equipment compatibility for this specific combination before purchase and installation. Refer to the official Daikin warranty documentation for complete details.

Recommended Accessories

• Compatible Heat Pump Thermostat – Select a thermostat approved for the installed heat pump and indoor air handler configuration.
• Compatible Electric Heat Kit – Select an approved field-installed heater kit for the AMST36BU1300 if supplemental electric heating is required.
• Outdoor Equipment Pad or Mounting Support – Select 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 DH4SEA3630 / AMST36BU1300

Support year-round indoor comfort with the Daikin DH4SEA3630 / AMST36BU1300 split heat pump system. Combining nominal 3-ton heat pump capacity, a single-stage Copeland scroll compressor, 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 when the equipment pairing is verified for the intended application.