the contacts should be normally open (no continuity)

Optimized Flow Dynamics: Differential Cv ratings accommodate specific pressure drops across mixing ports for system stability

This provides a critical safety interlock against dry-firing conditions in boiler vessels

Field Calibration: Allows for precise adjustments to the throttling range and setpoint to match specific zone requirements

Is the AV-813 compatible with VB-7xxx or VB-9xxx valves

York S1-026-33079-700 Control R-410A the contacts should be normallyThe York S1 026 33079 700 Control is a critical OEM replacement part designed for precision furnace and air handler management. This dual purpose York transformer and primary control serves as the electrical backbone of the ignition and blower sequences, converting line voltage to the steady 24V signal required for sensitive logic boards and safety circuits. Built for HVAC voltage regulation, the S1 026 33079 700 mitigates the risk of component