Lochinvar & A.O. Smith 100276822 Cutoff

The Lochinvar & A.O. Smith 100276822 Cutoff is a critical safety component designed for high-efficiency hydronic systems, including the Lochinvar FT series and AQUAS Low NOx pool heaters. This low water cutoff utilizes a sophisticated electronic probe to monitor boiler water levels in real-time, providing an essential defense against dry firing. Operating on a 24V circuit, the 100276822 features a dual auto/manual reset configuration, allowing technicians to tailor the safety response to specific site requirements. If the water level drops below the probe's threshold, the unit immediately interrupts the burner circuit to prevent catastrophic heat exchanger damage. Built for seamless integration as an OEM replacement part, this LWCO device ensures your commercial water heater or residential boiler maintains compliance with stringent safety standards while minimizing downtime caused by erratic level sensing. Its lightweight, 0.26 lb design allows for straightforward installation in tight control cabinets, making it a standard inventory item for service contractors maintaining A.O. Smith and Lochinvar equipment.

• Dry Fire Prevention: Actively monitors water presence to protect heat exchangers from cracked sections and thermal stress.
• Dual Reset Modes: Offers flexibility with auto/manual reset functionality to meet diverse local mechanical codes.
• OEM Compatibility: Precision-engineered for a direct fit in Lochinvar boilers and A.O. Smith water heaters, ensuring electrical and signal consistency.
• Low Voltage Operation: Standard 24V Low Water Cutoff interface integrates easily with existing 24VAC control transformers.

Is the 100276822 compatible with all Lochinvar FT series models?
Yes, this part is the designated low water cutoff for the FT series and several AQUAS pool heating units. Always verify the specific series on the data plate.

Does this unit come with the probe or is it just the controller?
This SKU typically includes the electronic control assembly. For systems requiring a new sensor, ensure the low water cutoff probe (often part 100309672) is inspected for scale buildup and replaced if necessary.

Can I bypass the manual reset if my code requires automatic restart?
The 100276822 is designed with a switchable or dual-function logic to allow for automatic reset or manual reset depending on the wiring and configuration selected during installation.

This item is not eligible for free shipping.

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.