Ruud RCFY4821STAAMC Cased A-coil 3.5-4 Ton R454B Txv

Product Description

The RUUD RCFY4821STAAMC is a cased multi-position A-coil evaporator designed for residential and light commercial split-system air conditioning and heat pump applications. Rated at 3.5 to 4 nominal tons (48,000 BTU/h), this coil is factory-equipped with a thermostatic expansion valve (TXV) and is charged for use with R454B refrigerant, a low-GWP A2L refrigerant increasingly specified in new installations. The cased enclosure allows for clean, straightforward installation in unconditioned spaces such as attics, mechanical closets, and utility rooms. HVAC technicians install this coil as the indoor heat-exchange component paired with a compatible outdoor condensing unit.

This coil is suited for residential forced-air systems where a multi-position configuration is required. The multi-position design supports upflow, downflow, and horizontal installations, making it adaptable to a range of equipment room layouts and ductwork configurations. At 21 inches wide, it fits common air handler and furnace cabinets sized for 3.5 to 4 ton capacity. The factory-installed TXV provides precise refrigerant metering across varying load conditions, improving system efficiency compared to fixed-orifice alternatives.

Key Features

• Nominal capacity of 3.5 to 4 tons (48,000 BTU/h) for residential and light commercial use
• Compatible with R454B refrigerant, meeting current low-GWP requirements for new equipment
• Factory-installed TXV for accurate refrigerant metering and improved EER performance
• Multi-position configuration supports upflow, downflow, and horizontal installations
• Cased enclosure provides a finished, install-ready assembly for unconditioned space mounting
• 21-inch cabinet width fits standard air handler and furnace platforms in the 3.5 to 4 ton range

Compatibility

Designed as an OEM-style cased evaporator coil for use with split-system air conditioners and heat pumps utilizing R454B refrigerant in the 3.5 to 4 ton capacity range.

Installation Notes

Installation should be performed by a licensed HVAC technician holding an EPA 608 refrigerant handling certification. Disconnect and lock out all electrical power and confirm the refrigerant system is properly recovered before opening any refrigerant connections. R454B is classified as an A2L mildly flammable refrigerant; follow all applicable local codes and manufacturer guidelines regarding ventilation, ignition source control, and leak detection during service. Verify cabinet dimensions and drain pan orientation before final placement to ensure proper condensate drainage per IFGC and local mechanical code requirements.

Technical Specifications

• Nominal Capacity: 48,000 BTU/h (3.5 to 4 Tons)
• Refrigerant: R454B
• Metering Device: TXV (Thermostatic Expansion Valve)
• Configuration: Multi-Position
• Casing: Cased
• Width: 21 inches

Standard Information

• Brand: RUUD
• Manufacturer Part Number: RCFY4821STAAMC