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The Trane WSK090A4S is a 7.5 ton commercial heat pump packaged unit designed to provide reliable heating and cooling for light commercial applications. Combining 81,000 Btu/h of high-temperature heat pump heating capacity with 88,000 Btu/h of AHRI net cooling capacity, this all-in-one rooftop system helps deliver year-round comfort while simplifying equipment placement with a single self-contained outdoor unit.
The integrated all-electric heat pump heating system provides 81,000 Btu/h of high-temperature heating capacity and 45,000 Btu/h of low-temperature heating capacity to help maintain comfortable indoor temperatures during colder weather. The WSK090A4S combines heating and cooling capabilities in one packaged rooftop system, providing year-round temperature control from a single outdoor unit.
The WSK090A4S provides 90,000 Btu/h of gross cooling capacity and 88,000 Btu/h of AHRI net cooling capacity. The unit has a rated EER of 11.0 and an IEER of 14.1. This combination of cooling capacity and commercial efficiency is designed to support dependable comfort during warm-weather operation.
With a rated EER of 11.0 and an IEER of 14.1, the WSK090A4S is designed to provide efficient commercial cooling performance across varying operating conditions. The unit uses R-454B refrigerant and a packaged heat pump configuration to provide all-electric heating and cooling from a single rooftop system. The unit has a nominal and AHRI-rated airflow of 3,000 CFM.
The packaged rooftop configuration combines the heat pump, cooling system, compressors, coils, fan, controls, and air-handling components into a single outdoor unit, helping simplify equipment placement and preserve valuable indoor space. The WSK090A4S features a convertible airflow configuration to provide installation flexibility for commercial rooftop applications.
The Trane WSK090A4S uses the Symbio 700 unit controller to provide advanced equipment control, configuration, status monitoring, alarms, and service capabilities. The controller includes a 2-inch x 16-inch onboard LCD display, while available communication options include BACnet, Modbus, and Air-Fi wireless communication for building automation integration. Symbio 700 also supports single-zone and true multiple-zone VAV capabilities on applicable Precedent configurations.
The Trane WSK090A4S is designed for commercial applications requiring integrated all-electric heating and cooling. Its 7.5 ton capacity, 3,000 CFM AHRI-rated airflow, convertible airflow configuration, and self-contained rooftop design make it well suited for commercial spaces requiring dependable year-round temperature control.
The WSK090A4S incorporates service-oriented features designed to simplify routine maintenance and equipment servicing. Hinged control-panel access, color-coded wiring, keyed connectors, toolless coil guards, and direct-drive fans help simplify service while eliminating routine fan-belt adjustment and replacement. The Symbio Service & Installation app provides additional configuration, setup, status, alarm, and troubleshooting capabilities.
The Trane WSK090A4S includes a 3-year limited warranty on parts, coils, and controls and a 5-year limited warranty on compressors. Warranty terms, conditions, and coverage are subject to the applicable Trane commercial warranty documentation.
Experience reliable year-round commercial comfort with the Trane WSK090A4S. Combining 81,000 Btu/h of high-temperature heat pump heating capacity and 88,000 Btu/h of AHRI net cooling capacity in one self-contained rooftop heat pump system.
For years, Trane has been committed to delivering reliable, high-quality, and affordable heating and cooling solutions. Backed by Trane’s legacy of engineering excellence, RunTru products are designed and built to provide dependable indoor comfort for homeowners. With a focus on durability and performance, Trane has earned the trust of HVAC professionals across North America, offering practical and cost-effective solutions without compromising on quality. Shop all Trane products.
