For larger units (models 1500–2000)

The Allanson 2721-631A Ignition Transformer is a heavy-duty power source engineered specifically for ABC and Sunray burners

ensuring seamless integration into existing pneumatic control systems with minimal field adjustment

Constructed with a standard 48 NEMA frame size and a durable sleeve bearing system

For technicians servicing systems with non-corrosive refrigerants like R-404A or R-507

Browning BK47H Sheave 323269-701 For larger units (models 1500–2000)The Browning BK47H Sheave is a precision engineered single groove cast iron pulley designed for heavy duty power transmission in HVACR blower assemblies and industrial fan drives. With a 4. 45" outside diameter and a 4. 1" pitch diameter for B belts, this BK cast iron sheave utilizes H Series bushings to ensure a secure, slip free concentric fit on the shaft. Engineered for versatility, the Browning BK47H is compatible with 4L, 5L, A, and B section