Lochinvar & A.O. Smith 100109522 Switch 320788-704 making it a drop-in replacement

making it a drop-in replacement for a wide range of OEM central heating units

while the high-pressure side provides a 10 to 30 bar range with fixed 4 bar differential and manual reset functionality

Designed for heavy-duty thermal output

this model provides the necessary accuracy for stable flame modulation and efficient fuel-to-air ratios in commercial heating and process applications

It features a 4-bolt flanged union design with a 3-1/16" mounting center

Lochinvar & A.O. Smith 100109522 Switch 320788-704 making it a drop-in replacementThe Lochinvar & A. O. Smith 100109522 Pressure Switch is a critical safety component designed for precise pressure monitoring in high efficiency boilers, furnaces, and water heaters. This SPDT pressure switch (Single Pole Double Throw) features a fixed set point, typically calibrated to 0. 95 WC, ensuring that the combustion blower is moving sufficient air before the ignition sequence initiates. As a genuine OEM replacement part, the 100109522 is