For proper mechanical rotation and alignment

making it a standard inventory item for technicians servicing residential heating systems

allowing technicians to replace the power head without draining the loop or using specialized tools

Remote Flame Sensing: Dedicated circuitry for remote flame sense ensures reliable combustion monitoring in demanding burner configurations

Key Benefits Interchangeable Accuracy: Verified ±2% NIST traceable calibration provides reliable performance without the need for on-site calibration tools

Johnson Controls W42AA-1 Humidistat 323269-701 For proper mechanical rotation andThe Johnson Controls W42AA 1 Humidistat is a heavy duty, 3 wire humidity controller designed for precision management of both humidifying and dehumidifying equipment. Engineered with a stable 150 strand human hair sensing element, this unit provides superior sensitivity and long term accuracy compared to synthetic alternatives. It operates on line voltage (120 240 VAC) or low voltage circuits, utilizing a Single Pole Double Throw (SPDT) snap acting