The Johnson Controls T-4752-206 is a high-volume output pneumatic heating-cooling thermostat engineered for precise temperature regulation in commercial HVAC systems

The HVAC control board is 18-30Vac rated and monitors thermostat demands across all modes—heat

Failure is often caused by a restricted vent pipe

Standard McDonnell & Miller probe rods are often field-cut by technicians to match the specific low-water cutoff point of the vessel

917166C is the direct replacement for 917166B

York S1-025-30867-001 Transformer Freon The Johnson Controls T-4752-206 isThe York S1 025 30867 001 Transformer is a heavy duty step down component engineered for industrial and commercial HVAC applications requiring precise voltage regulation. This genuine OEM part features a multi tap 460 575V primary input and a stable 230V secondary output, rated at 165VA. Designed to handle high demand electrical loads, it ensures that your system's control circuits and auxiliary components receive consistent power, preventing