Trane WHJ300A4S00103T Rooftop Heat Pump 25 Ton 460V

Product Description

The TRANE WHJ300A4S00103T is a commercial packaged rooftop heat pump unit rated at 25 nominal tons of cooling and heating capacity. Designed for rooftop installation on commercial structures, the unit operates on 460-volt, 3-phase power, making it suitable for light commercial and heavy commercial building applications. The WHJ300A4S00103T uses R-410A refrigerant and delivers both heating and cooling from a single self-contained cabinet. Licensed commercial HVAC technicians handle installation, startup, and service. The unit consolidates all refrigeration, air handling, and heat pump components into one rooftop assembly, simplifying mechanical room requirements and roof penetration planning.

The WHJ300A4S00103T is engineered for commercial rooftop applications where a single packaged unit must handle the full heating and cooling load of a large commercial space. Typical installations include retail buildings, warehouses, office complexes, and light industrial facilities. At 25 tons, the unit addresses substantial cooling and heating demands without requiring a split system or separate air handler. The 460-volt, 3-phase electrical supply requirement means a properly rated commercial electrical service disconnect and branch circuit must be in place prior to installation.

Key Features

• 25-ton nominal capacity for large commercial cooling and heating loads
• Heat pump operation provides both heating and cooling from one packaged cabinet
• 460-volt, 3-phase power supply for commercial electrical infrastructure
• R-410A refrigerant system with no ozone-depleting chlorine compounds
• Self-contained rooftop design eliminates need for a separate indoor air handler

Compatibility

Designed as an OEM packaged rooftop heat pump unit for commercial HVAC applications requiring 25-ton capacity at 460-volt, 3-phase power.

Installation Notes

Installation must be performed by a licensed commercial HVAC technician holding the appropriate EPA Section 608 certification for R-410A refrigerant handling. Disconnect and lock out all electrical power before servicing the unit. The rooftop curb adapter and structural roof support must be verified to meet local building code and the unit manufacturer weight specifications before mounting. Startup commissioning should follow applicable IFGC and local mechanical code requirements, and all electrical work must conform to NEC standards for commercial equipment.

Technical Specifications

• Unit Type: Heat Pump
• Cooling Capacity: 25 tons (nominal)
• Voltage: 460 volts, 3-phase
• Refrigerant: R-410A

Standard Information

• Brand: TRANE
• Manufacturer Part Number: WHJ300A4S00103T