The York S1-324-40880-002 is a professional-grade

Field-Service Design: Includes a built-in after-hours override button for manual occupancy triggering and an accessible data port for diagnostic tool connection

it allows technicians to fine-tune CFM delivery for precise temperature control and system balancing

extending the service life of the HVAC contactor

The high-pressure range of up to 425 psi is typically sufficient for many R-410A applications

Lochinvar & A.O. Smith 100108729 Pilot 321894-709 The York S1-324-40880-002 is aThe Lochinvar & A. O. Smith 100108729 Pilot is a precision engineered LP pilot assembly (model PB 5S) designed specifically for liquid propane fired water heaters and boilers. As a genuine OEM replacement part, it ensures direct compatibility with A. O. Smith GCV, XCV, and Lochinvar residential units where a stable pilot flame is critical for safe ignition. This pilot burner assembly includes the requisite orifice calibrated for LP gas pressure, a