Because this is a mechanical clock

By utilizing this OEM humidifier valve

this Watts 174A-3/4-30 valve is factory-set to trip at 30 PSI

Durable Material Construction: Synthetic EPDM diaphragm resists thermal degradation in steam and hot water applications

Specifically listed for York model B1SP090E02025B

Indeeco 1007182 Transformer 319847-401 Because this is a mechanicalThe Indeeco 1007182 Transformer is an industrial grade step down control transformer engineered for high demand HVACR and automation environments. Designed to convert a 480V primary voltage to a stable 24V secondary output, this 20VA power rated component is essential for driving low voltage control circuits, including thermostats, relays, and motor starters. Its rugged construction is built to withstand the harsh conditions of mechanical rooms and