What is the function of the auxiliary switches on this actuator

This technical HVAC part is essential for restoring factory-standard performance and quiet operation to the system's airflow delivery components

this OEM Reznor 121599 replacement ensures compatibility with original factory specifications without the need for field modifications

Dual-Stage Support: Seamlessly manages 1 and 2 stage operations

35 Amp draw and single-phase power to efficiently purge the heat exchanger of exhaust gases before the ignition cycle begins

Belimo 01APS-501 Pressure Switch Els PW 29614 What is the function ofReliable pressure monitoring is non negotiable for high performance HVAC systems, and the Belimo 01APS 501 Differential Pressure Switch is the industry standard for precise air flow management. Designed for duct differential pressure sensing, this versatile switch excels at monitoring overpressure, vacuum, and differential air pressure in both commercial HVAC and energy management applications. With an adjustable setpoint range of 0. 8 to 4. 0 inches