Daikin 4 Ton 14.3 SEER2 Air Conditioner and Multi-Positional Air Handler System | 460V 3 Phase - R32 - Single Stage

Reliable 4-Ton Commercial Cooling with a Daikin Split System Air Conditioner for Light Commercial Applications

The Daikin DC3SEA4840 / AMST48CU1300 is a nominal 4-ton split air conditioner system designed to provide ducted cooling for suitable light commercial applications and other compatible spaces. Combining the DC3SEA4840 outdoor condensing unit with the AMST48CU1300 multi-position, multi-speed air handler, this system features single-stage scroll compressor technology, a direct-drive electronically commutated motor (ECM) blower, and R-32 refrigerant technology. The DC3SEA4840 outdoor unit is designed for 460V electrical service, while the AMST48CU1300 air handler uses a compatible indoor electrical supply. The split system configuration offers installation flexibility, and the air handler's multiple blower settings support airflow adjustment according to ductwork and system requirements. Final cooling capacity and efficiency ratings should be confirmed using the manufacturer's approved equipment combination data.

Key Benefits

• Nominal 4-Ton Cooling Capacity – Provides 48,000 BTU/h of nominal outdoor cooling capacity for appropriately sized ducted applications.
• Single-Stage Scroll Compressor – Provides established compressor technology for dependable cooling operation during warm-weather conditions.
• 9-Speed ECM Blower Motor – Offers multiple airflow settings to accommodate ductwork requirements and system commissioning needs.
• 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.
• R-32 Refrigerant Technology – Uses R-32 refrigerant technology with a compatible air handler designed for A2L refrigerant applications.
• 460V Outdoor Electrical Configuration – Supports compatible commercial electrical installations requiring 460V power.
• Service-Friendly Components – Includes a factory-installed outdoor filter drier, accessible service valve gauge ports, and tool-less air handler filter access to support routine maintenance.

4-Ton Cooling Capacity for Commercial Comfort

The Daikin DC3SEA4840 / AMST48CU1300 combines a nominal 48,000 BTU/h outdoor air conditioner with an indoor air handler designed for compatible ducted cooling applications. The DC3SEA4840 uses a single-stage scroll compressor and R-32 refrigerant to provide cooling during warm-weather operation. The outdoor unit is nominally rated at 4 tons, and the AMST48CU1300 air handler is also classified in the nominal 4-ton capacity range. Actual system capacity depends on the approved indoor and outdoor equipment combination, indoor and outdoor operating conditions, airflow settings, refrigerant charge, and installation quality. Confirm the rated capacity for the exact pairing using the applicable manufacturer or AHRI performance data.

Single-Stage Scroll Compressor and Cooling Performance

The DC3SEA4840 outdoor condensing unit features a high-efficiency scroll compressor and advanced Copeland® CoreSense™ Technology. Daikin's DC3SEA commercial air conditioner series offers nominal cooling capacities from 36,000 to 60,000 BTU/h and published efficiency ratings up to 13.4 SEER2 and 11.2 EER2, depending on the rated equipment combination. The DC3SEA4840 incorporates 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 refrigeration-system service and dependable cooling operation when the equipment is properly installed and maintained.

Cooling Efficiency with Single-Stage Operation

The DC3SEA4840 uses single-stage compressor operation. The exact SEER2 and EER2 ratings for the DC3SEA4840 paired with the AMST48CU1300 must be confirmed using the applicable manufacturer or AHRI-certified combination data. These standardized ratings provide a basis for comparing cooling efficiency under defined test conditions. Actual energy consumption depends on building characteristics, outdoor temperatures, thermostat settings, operating schedules, duct design, airflow, and equipment maintenance. The AMST48CU1300 air handler features a direct-drive, 9-speed ECM blower motor, allowing airflow settings to be selected according to the system's installation requirements.

Split System Design for Flexible Installation

The split system configuration separates the DC3SEA4840 outdoor condensing unit from the AMST48CU1300 indoor air handler, allowing equipment placement to be adapted to the building layout. Daikin's published DC3SEA4840 specifications identify a 3/8-inch liquid line and a 1-1/8-inch suction line for the designated refrigerant line-set configuration, with a 3/8-inch liquid service valve and a 7/8-inch suction service valve. The unit is factory charged for 15 feet of 3/8-inch liquid line, and the refrigerant charge must be adjusted according to the manufacturer's instructions. The AMST48CU1300 supports upflow, downflow, and horizontal installation configurations. Verify line-set requirements, adapters, additional charge, allowable piping lengths, vertical separation, clearances, and approved equipment compatibility before installation.

Airflow, Controls & Indoor Comfort

The AMST48CU1300 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. Its multi-speed blower provides flexibility when adjusting airflow to suit the installed ductwork and system requirements. The AMST R-32 series also incorporates a factory-installed refrigerant sensor designed for the lifespan of the coil. Compatible thermostat and control equipment must be selected according to the approved system configuration and manufacturer's requirements. Proper airflow adjustment, refrigerant charging, and thermostat setup are important for achieving reliable cooling performance.

Commercial Applications and Installation Flexibility

The Daikin DC3SEA4840 / AMST48CU1300 is intended for suitable ducted cooling applications where the equipment combination, electrical supply, airflow requirements, and rated performance meet project specifications. Potential applications include appropriately sized offices, retail spaces, and other light commercial environments requiring centralized ducted air conditioning. The separate indoor and outdoor components provide flexibility for equipment placement, while the AMST48CU1300's multi-position cabinet accommodates different installation orientations. The DC3SEA4840 requires 460V electrical service, with the outdoor unit's phase and frequency requirements verified against its nameplate. Confirm the indoor air handler's electrical requirements separately and ensure that both supplies are compatible with the building's electrical provisions.

Service & Maintenance Features

The DC3SEA4840 outdoor unit includes a factory-installed filter drier, sweat-connection service valves with accessible gauge ports, a high-pressure switch, an enclosed contactor, and extended-life capacitors. The outdoor cabinet features a coil guard and access provisions to support routine inspection and servicing. The AMST48CU1300 air handler features tool-less filter access and a coil mounting track for repositioning during service. 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. All refrigeration-system servicing must follow Daikin's applicable R-32 safety and installation requirements.

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 AMST48CU1300 air handler warranty must be confirmed separately using the applicable Daikin warranty documentation. Coverage, registration requirements, eligibility, limitations, and exclusions vary by product and jurisdiction. Review the current Daikin warranty documents for both models to confirm applicable coverage and conditions.

Recommended Accessories

• Compatible Thermostat or Commercial Control – Select a thermostat compatible with the single-stage cooling system and approved indoor and outdoor equipment combination.
• 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 for the DC3SEA4840 outdoor unit and AMST48CU1300 indoor air handler, based on each equipment nameplate and applicable electrical codes.
• Refrigerant Line Set – Select compatible refrigerant piping with the required 3/8-inch liquid and 1-1/8-inch suction line sizes, accounting for the outdoor unit's service valve connections and any required field-supplied adapter.
• Electric Heater Kit – Select a compatible Daikin AMST48CU1300 electric heater kit if supplemental electric heat is required. Confirm approved kit compatibility, electrical requirements, and minimum airflow requirements before selection.

Dependable Commercial Cooling with the Daikin DC3SEA4840 / AMST48CU1300

Experience dependable ducted cooling with the Daikin DC3SEA4840 / AMST48CU1300 split system air conditioner. Combining a nominal 4-ton outdoor condensing unit with a multi-position, 9-speed ECM air handler, this configuration offers single-stage scroll compressor technology, R-32 refrigerant, flexible installation options, and service-friendly components for compatible light commercial applications. Confirm the approved equipment pairing, electrical requirements, and certified system performance ratings to ensure the selected configuration meets the project's cooling and installation requirements.