Daikin 3 Ton 13.4 SEER2 Air Conditioner and Multi-Positional Air Handler System | 460V 3 Phase - R32 - Single Stage

Efficient 3-Ton Commercial Split Air Conditioner for Light Commercial Applications with R-32 Refrigerant

The Daikin DC3SEA3640 / AMST36CU1300 is a nominal 3-ton commercial split air conditioner system designed to provide dependable ducted cooling for suitable light commercial applications. Combining the DC3SEA3640 outdoor condensing unit with the AMST36CU1300 multi-position, multi-speed air handler, this system delivers a rated cooling capacity of 34,200 BTU/h in the manufacturer's published rated combination. With efficiency ratings of 13.4 SEER2 and 11.2 EER2, single-stage scroll compressor technology, and R-32 refrigerant, the system offers flexible installation options and service-friendly features. The outdoor unit requires a 460V, three-phase electrical supply, making it suitable for compatible commercial electrical installations.

Key Benefits

• 13.4 SEER2 Energy Efficiency – Provides a published seasonal cooling efficiency rating to help evaluate energy performance for commercial cooling applications.
• 3-Ton Nominal Cooling Capacity – Delivers 34,200 BTU/h of rated cooling capacity in the manufacturer's published rated combination.
• Multi-Speed ECM Blower Motor – The air handler's direct-drive, 9-speed electronically commutated motor provides airflow adjustment flexibility for different ductwork configurations.
• Multi-Position Air Handler – Supports upflow, downflow, and horizontal installation configurations to accommodate different building layouts.
• Flexible Split System Installation – Separates the outdoor condensing unit from the indoor air handler to provide flexibility in equipment placement.
• High-Efficiency Scroll Compressor – Incorporates scroll compressor technology and Copeland® CoreSense™ Technology for dependable cooling operation.
• R-32 Refrigerant Technology – Uses R-32 refrigerant in the matched system configuration, with a factory-installed refrigerant sensor in the air handler.
• Service-Friendly Construction – Includes a factory-installed filter drier, accessible outdoor service valve gauge ports, and tool-less air handler filter access to support routine maintenance.

Rated Cooling Capacity for Commercial Comfort

The Daikin DC3SEA3640 / AMST36CU1300 split system provides a nominal 3-ton cooling solution with a published rated cooling capacity of 34,200 BTU/h for the manufacturer's rated combination. The outdoor unit uses a single-stage scroll compressor and R-32 refrigerant to support cooling during warm-weather operation. Its published cooling operating range is 55°F to 115°F outdoor dry-bulb temperature. Actual cooling performance depends on the approved equipment combination, indoor and outdoor operating conditions, airflow settings, refrigerant charge, and installation quality.

High-Efficiency Scroll Compressor and Cooling Performance

The DC3SEA3640 outdoor condensing unit features a high-efficiency scroll compressor and advanced Copeland® CoreSense™ Technology. The published rated combination achieves 11.2 EER2 and 13.4 SEER2 under the manufacturer's specified rating conditions. Additional outdoor unit features include a factory-installed filter drier, sweat-connection service valves with accessible gauge ports, a high-pressure switch, an enclosed contactor, and extended-life capacitors. These components support routine service procedures and dependable cooling operation when the system is correctly installed and maintained.

13.4 SEER2 Efficiency with Single-Stage Operation

The DC3SEA3640 uses single-stage compressor operation and is rated at 13.4 SEER2 and 11.2 EER2 in the manufacturer's published rated combination. SEER2 and EER2 provide standardized measures for comparing cooling efficiency under defined test conditions. Actual energy consumption depends on building characteristics, operating schedules, outdoor temperatures, thermostat settings, duct design, and equipment maintenance. The matched AMST36CU1300 air handler features a direct-drive, 9-speed ECM blower motor, allowing airflow settings to be adjusted according to system requirements and the manufacturer's installation instructions.

Split System Design for Flexible Installation

The split system configuration separates the DC3SEA3640 outdoor condensing unit from the AMST36CU1300 indoor air handler, allowing the equipment to be positioned according to the building layout and installation requirements. The outdoor unit is factory charged for 15 feet of refrigerant tubing and features 3/8-inch liquid and 3/4-inch suction service valve connections. The published maximum total refrigerant piping length is 200 feet, with a maximum vertical separation of 79 feet. The air handler supports upflow, downflow, and horizontal installation configurations. Refrigerant line sizing, additional refrigerant charge, piping limits, and equipment clearances must be verified against the applicable Daikin installation instructions before installation.

Airflow, Controls & Indoor Comfort

The AMST36CU1300 air handler features a direct-drive, 9-speed ECM blower motor, an all-aluminum evaporator coil with high-performance coated fin stock, and a factory-installed thermal expansion valve for compatible cooling applications. The multi-speed blower provides flexibility when adjusting airflow to suit the installed ductwork and system requirements. The air handler also incorporates a factory-installed R-32 refrigerant sensor. Compatible thermostat and control equipment must be selected according to the system configuration and manufacturer's requirements. Proper airflow setup, refrigerant charging, and thermostat configuration help support reliable cooling performance.

Commercial Applications and Installation Flexibility

The Daikin DC3SEA3640 / AMST36CU1300 is designed for suitable ducted cooling applications in light commercial environments and other compatible spaces. Potential applications include appropriately sized offices, retail spaces, and similar buildings requiring centralized ducted air conditioning. The separate indoor and outdoor components provide flexibility for equipment placement, while the multi-position air handler accommodates different installation orientations. The outdoor unit's 460V, three-phase power requirement should be confirmed against the building's available electrical supply before equipment selection. Final system sizing should be based on a professional cooling-load calculation and the manufacturer's approved equipment combination.

Service & Maintenance Features

The DC3SEA3640 outdoor unit includes a factory-installed filter drier, sweat-connection service valves with accessible gauge ports, an enclosed contactor, a high-pressure switch, and extended-life capacitors. Its removable grille-style top, steel louver coil guard, and top and side maintenance access support inspection and servicing. The AMST36CU1300 air handler features tool-less filter access and a coil mounting track to facilitate service procedures. Routine maintenance should include air filter inspection and replacement as needed, indoor and outdoor coil cleaning, condensate drainage checks, electrical connection inspection, and verification of refrigerant charge and airflow by qualified service personnel.

Warranty

The Daikin DC3SEA commercial air conditioner series includes a 5-Year Parts Limited Warranty. Online registration must be completed within 60 days of installation to receive the 5-Year Parts Limited Warranty where registration is required by applicable law. The AMST R-32 air handler warranty must be verified separately against the applicable manufacturer warranty documentation. Coverage, registration requirements, eligibility, limitations, and exclusions vary by product and jurisdiction. Review the current Daikin warranty documents for the DC3SEA3640 and AMST36CU1300 to confirm the applicable coverage for each component.

Recommended Accessories

• Compatible Thermostat or Commercial Control – Select a thermostat compatible with the single-stage cooling system and the installed air handler configuration.
• Outdoor Equipment Pad – Provides a suitable support surface for the outdoor condensing unit where ground-level installation is used.
• Electrical Disconnect – Select an appropriately rated disconnect based on the DC3SEA3640 nameplate, 460V three-phase electrical requirements, and applicable electrical codes.
• Refrigerant Line Set – Select compatible refrigerant piping with 3/8-inch liquid and 3/4-inch suction connections, sized and installed according to Daikin requirements.
• Electric Heater Kit – Select a compatible Daikin AMST electric heater kit if supplemental electric heat is required, subject to approved kit compatibility, electrical requirements, and minimum airflow requirements.

Dependable Commercial Cooling with the Daikin DC3SEA3640 / AMST36CU1300

Experience dependable ducted cooling with the Daikin DC3SEA3640 / AMST36CU1300 split system air conditioner. Combining a nominal 3-ton outdoor condensing unit with a multi-position, 9-speed ECM air handler, this system provides a rated cooling capacity of 34,200 BTU/h, published efficiency ratings of 13.4 SEER2 and 11.2 EER2, R-32 refrigerant technology, and flexible installation configurations for compatible light commercial applications.