Resideo AT72D1089 Transformer R-407C whereas 2AK sheaves are smaller

whereas 2AK sheaves are smaller and designed primarily for A-section belts

The CWLE rotation (Clockwise Lead End) and 5/16" x 2

you can increase or decrease the pitch diameter to meet exact system static pressure requirements

using a genuine Trane HVAC part is critical for maintaining the factory-specified airflow and RPM required to meet system SEER ratings

Resideo AT72D1089 Transformer R-407C whereas 2AK sheaves are smallerThe Resideo AT72D1089 Transformer is a professional grade solution for technicians requiring a reliable 120V to 24V step down for HVAC control circuits. Engineered with a 40VA power rating, this unit is built to manage the electrical load of 24VAC thermostats, gas valves, and multi zone relays. The hardware features a 4"x4" plate mount design and a NEMA Type D enclosure, ensuring compliance with NEC Class 2 (not wet) and Class 3 (wet) requirements.