Trane 5TWX5042A1000A 3.5 Ton 42,000 BTU 15 SEER2 Split System Heat Pump Outdoor Unit w/ WeatherGuard Top- R454B

Trane 5TWX5042A1000A – 42,000 BTU 3.5 Ton 15 SEER2 Single-Stage Split System Heat Pump

Deliver dependable year-round comfort with the Trane 5TWX5042A1000A , a 3.5-ton single-stage split system heat pump engineered for efficient residential heating and cooling performance. As part of Trane’s 5TWX50 series heat pump platform , this R-454B system combines a Climatuff® scroll compressor, Spine Fin™ all-aluminum outdoor coil, and durable weather-resistant cabinet construction to provide reliable operation and long-term comfort.

Single-Stage Climatuff® Scroll Compressor Performance
The 5TWX5042A1000A utilizes a Climatuff® single-stage scroll compressor (1 – 1 configuration) designed for dependable heating and cooling operation. The compressor includes internal over-temperature and pressure protection along with a centrifugal oil pump design to support smooth startup, low vibration, and reliable long-term performance.

3.5 Ton Heating & Cooling Capacity Platform
Model nomenclature identifies this system as a 3.5-ton heat pump (42 = 42,000 BTU nominal capacity) operating on 208/230V, 1-phase, 60 Hz electrical service . The unit is certified under the AHRI Unitary Air-Conditioner Equipment Certification Program (Standard 210/240) and rated for sound performance according to AHRI Standard 270 .

Direct-Drive Outdoor Fan System
The outdoor fan assembly features a 27.5-inch propeller blade driven by a direct-drive single-speed motor (1/3 HP) operating at approximately 850 RPM . The fan produces approximately 4,992 CFM airflow at 0.0 in. w.g. , supporting efficient condenser heat rejection and system performance during heating and cooling operation.

Spine Fin™ All-Aluminum Outdoor Coil
The condenser coil incorporates Trane’s patented Spine Fin™ all-aluminum coil design with 2 rows at 24 fins per inch and 30.8 sq. ft. of face area . This design enhances heat transfer efficiency while providing corrosion resistance and durability. The coil is protected on all four sides by louvered cabinet panels designed to maintain airflow and safeguard the coil in outdoor installations.

R-454B Refrigerant & Charging Specifications
The 5TWX5042A1000A utilizes R-454B refrigerant with an approximate factory charge of 7 lb, 14 oz . Standard line sizes include 7/8" O.D. gas and 5/16" O.D. liquid connections , and the system uses a thermal expansion valve (TXV) refrigerant control with a 10°F subcooling charging specification .

Quiet Operation with AHRI-Rated Sound Performance
The 5TWX5042A heat pump carries a 72 dB(A) A-weighted sound power level rating under AHRI Standard 270 test conditions, supporting controlled outdoor sound levels suitable for residential environments.

Durable Cabinet Construction for Outdoor Installation
The cabinet is constructed of heavy-gauge galvanized steel with a weather-resistant powder paint finish . Panels are tested through 1,000 hours of salt-spray exposure , ensuring corrosion resistance and long-term durability in outdoor environments.

Operating Range & Low Ambient Cooling Options
As manufactured, the system provides cooling capacity down to 55°F outdoor ambient . Optional evaporator defrost controls and low ambient kits can extend cooling operation to 40°F, 30°F (with TXV), or as low as 20°F when equipped with the appropriate Trane low ambient accessories.

Engineered for Reliable Residential Heating and Cooling
Ideal for medium to larger homes and residential HVAC systems, the Trane 5TWX5042A1000A heat pump delivers dependable 3.5-ton single-stage heating and cooling performance , durable Spine Fin™ coil technology, and efficient R-454B refrigerant operation in a robust split system platform built for consistent comfort and long-term reliability.