Enhanced Thermal Management: The Nema 1 enclosure features integrated fan cooling to maintain internal component integrity under high-load conditions

Integrated Safety: Includes a high-grade inlet filtered screen and an automatic pilot safety valve to protect internal components from debris and gas interruptions

Technicians can usually jump the "Test" pins to force a manual defrost cycle

reducing downtime during routine system inspections

such as flame sensing

Lochinvar & A.O. Smith 100166241 Pressure Switch 320734-701 Enhanced Thermal Management: The NemaThe Lochinvar and A. O. Smith 100166241 Pressure Switch is a critical safety component designed for precise combustion air monitoring in high efficiency water heaters and boilers. This SPDT (Single Pole Double Throw) switch is factory calibrated to a . 21" WC (water column) set point, ensuring the inducer fan generates sufficient static pressure before allowing the ignition sequence to proceed. Engineered as a direct OEM replacement part, it replaces