Lochinvar & A.O. Smith 100111064 Air Switch
The Lochinvar & A.O. Smith 100111064 Air Switch is a critical safety component designed for precise pressure sensing in high-efficiency boilers and water heaters. Engineered with a 6.0" WC to 5.0" WC set point, this differential pressure switch ensures the combustion blower is moving sufficient air before allowing the ignition sequence to proceed. As a genuine OEM replacement part, it maintains the precise calibration required to prevent nuisance lockouts or unsafe operating conditions. This NS2V-1167-00 switch is frequently utilized in Lochinvar Knight and A.O. Smith Cyclone series, providing the reliable draft inducer proving necessary for high-static applications. For service technicians, this switch offers a direct-fit solution that matches factory electrical specs and pneumatic connections, ensuring the flue gas pressure monitoring remains within the manufacturer's established safety tolerances. Proper HVAC pressure switch troubleshooting often points to this component when the system fails to prove airflow during pre-purge.
Key Benefits for the Contractor:- Precise Calibration: Factory-set at .6" WC to 5.0" WC to ensure accurate combustion air proving across varying vent lengths.
- Direct Compatibility: Replaces part number 100111064 (previously 105151-000) in Lochinvar, A.O. Smith, and State Industries equipment.
- Rugged Construction: Built to withstand the high-temperature environments of commercial mechanical rooms and industrial boiler footprints.
- Simplified Diagnostics: Standardized terminal layout allows for quick pressure switch testing using a digital manometer and multimeter.
What causes a Lochinvar air switch to fail? Failures are typically caused by moisture in the sensing lines, a ruptured internal diaphragm, or carbon buildup in the venting system causing the switch to operate outside its .6/5.0" WC range.
Can I use a universal air switch as a substitute? Using a non-OEM switch is not recommended as the specific pressure switch set points are calibrated to the blower's performance curve and the heat exchanger's static resistance.
How do I verify if the 100111064 is closing? Measure the differential pressure at the switch ports using a manometer while the inducer is running; if the pressure exceeds .6" WC but the circuit remains open, the switch requires replacement.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Product Information
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Description
The Lochinvar & A.O. Smith 100111064 Air Switch is a critical safety component designed for precise pressure sensing in high-efficiency boilers and water heaters. Engineered with a 6.0" WC to 5.0" WC set point, this differential pressure switch ensures the combustion blower is moving sufficient air before allowing the ignition sequence to proceed. As a genuine OEM replacement part, it maintains the precise calibration required to prevent nuisance lockouts or unsafe operating conditions. This NS2V-1167-00 switch is frequently utilized in Lochinvar Knight and A.O. Smith Cyclone series, providing the reliable draft inducer proving necessary for high-static applications. For service technicians, this switch offers a direct-fit solution that matches factory electrical specs and pneumatic connections, ensuring the flue gas pressure monitoring remains within the manufacturer's established safety tolerances. Proper HVAC pressure switch troubleshooting often points to this component when the system fails to prove airflow during pre-purge.
Key Benefits for the Contractor:- Precise Calibration: Factory-set at .6" WC to 5.0" WC to ensure accurate combustion air proving across varying vent lengths.
- Direct Compatibility: Replaces part number 100111064 (previously 105151-000) in Lochinvar, A.O. Smith, and State Industries equipment.
- Rugged Construction: Built to withstand the high-temperature environments of commercial mechanical rooms and industrial boiler footprints.
- Simplified Diagnostics: Standardized terminal layout allows for quick pressure switch testing using a digital manometer and multimeter.
What causes a Lochinvar air switch to fail? Failures are typically caused by moisture in the sensing lines, a ruptured internal diaphragm, or carbon buildup in the venting system causing the switch to operate outside its .6/5.0" WC range.
Can I use a universal air switch as a substitute? Using a non-OEM switch is not recommended as the specific pressure switch set points are calibrated to the blower's performance curve and the heat exchanger's static resistance.
How do I verify if the 100111064 is closing? Measure the differential pressure at the switch ports using a manometer while the inducer is running; if the pressure exceeds .6" WC but the circuit remains open, the switch requires replacement.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
