The internal SPDT snap-action switch is rated for 10 Amps at 125

Blower Management: Governs blower motor delays and inducer fan relay logic for safe heat exchanger cooling

a significant delta-T indicates internal plugging and a loss of system capacity

open-air-over (OAO) design ensures reliable operation in high-ambient exhaust environments

Siemens Building Technology 257-02044 Valve Assembly R-22 The internal SPDT snap-action switchThe Siemens Building Technology 257 02044 Valve Assembly is a contractor grade solution for precise fluid control in commercial HVACR systems. Utilizing the Powermite 599 MT Series architecture, this 2 way normally open valve is engineered for high performance regulation of hot or chilled water in terminal units like convectors and fin tube radiators. The assembly features a 3 4" NPT forged brass body and internal brass trim, ensuring long term