Visible moisture or steam escaping near the bellows base

because this is a wrot copper pressure fitting rated for 700 PSI

What is the maximum amperage for the 24V circuit

Its internal inherent protection and internal pressure relief (IPR) valve safeguard the motor against thermal overload and high-pressure differentials

For smaller residential vent applications

MARS 61323 Contactor Visible moisture or steam escapingFor service technicians requiring a reliable 277V switching solution, the MARS 61323 Contactor is a professional grade 1 pole definite purpose contactor designed for high cycle environments. This unit features a 30A inductive FLA rating (40A resistive) and is the direct replacement for C301NU50 and Furnas Centurion 2000 Class 45 series. Engineered for HVACR applications including refrigeration racks, commercial air conditioning, and electric heat, it