the HH11AZ070 provides essential safety shutdowns in the event of flame failure or ignition delay

a reading of "open" or visible hairline cracks on the silicon carbide element indicates a failed component requiring immediate replacement to restore burner sequence operation

Common Questions: What is the primary application for the 36H33-412

5 ohms) to verify electrical integrity

Downsizing horsepower in a condenser application will lead to overheating and premature failure due to insufficient torque for the fan blade pitch

Lochinvar & A.O. Smith 100277772 Pressure Switch 321894-709 the HH11AZ070 provides essential safetyThe Lochinvar & A. O. Smith 100277772 Pressure Switch is a critical safety component engineered for high altitude applications in Crest FBN and FBL heating boilers. This F9 high altitude air pressure switch is factory calibrated with a 4. 1 in WC set point to monitor combustion chamber pressure accurately in thinned atmospheres. It serves as a proving switch, ensuring the combustion air blower provides sufficient flow for a clean, safe burn before the