Since this is a normally closed (NC) switch

Reduced Wiring Costs: Internal power logic eliminates the requirement for additional 24V transformers to trigger the coil

Optimized Airflow Dynamics: Maintains the critical seal required for proper static pressure and safe exhaust of combustion gases

Precise Adjustment: Dual scales allow for independent setting of high and low trip points to safeguard compressors against loss of charge or excessive discharge pressure

Allanson Transformers 421-BT636 Transformer Els PW 17895 Since this is a normallyThe Allanson 421 BT636 is a heavy duty universal ignition transformer designed for reliable spark ignition in industrial and residential oil burners. Engineered with a 120Vac supply voltage and a 10,000Vac secondary voltage at 23mA, this unit ensures a consistent high voltage arc for efficient combustion. Featuring a mid point ground configuration, it provides stable electrical performance and reduced electromagnetic interference. As a direct