If using the 12A49 vent limiter

The S1-025-41319-000 is an auto-reset safety switch

Whether you are performing a routine overhaul or correcting a mechanical failure

and White-Rodgers

For contractors performing maintenance or emergency repairs

Maxitrol TD214B Selector Switch Refrigerant If using the 12A49 ventThe Maxitrol TD214B is a high performance dual remote temperature selector engineered for direct fired make up air systems. Designed for industrial and commercial heating processes, this selector allows for seamless switching between two critical temperature ranges: a lower range of 55F to 90F (typically for spray mode or standard environmental control) and a higher range of 120F to 170F (optimized for bake mode or dry cycles). This Selectra Series 14