Lochinvar & A.O. Smith 100109896 Dual Control

The Lochinvar & A.O. Smith 100109896 Dual Control (previously 1102R) is a high-performance immersion thermostat designed for precise temperature regulation in commercial water heating systems. This dual-action aquastat features a manual reset safety limit and an adjustable operating control, ensuring consistent thermal management in Lochinvar copper-fin boilers and A.O. Smith heavy-duty water heaters. Engineered for 120V/240V applications, the 100109896 offers reliable SPST switching logic to prevent overheating and dry-fire conditions. Its rugged sensing bulb provides rapid thermal response times, maintaining system setpoints within tight tolerances even under high-demand cycles. For technicians servicing commercial HVAC systems, this OEM replacement part ensures seamless mechanical compatibility and electrical alignment with factory wiring harnesses. Replacing a worn 100103730 control or 1102R unit with this genuine component restores the integrity of the limit string, preventing nuisance lockouts and ensuring optimal combustion cycles across various liquid-phase heating applications.

• Dual-Function Integration: Combines adjustable operating control and high-limit safety in a single housing to simplify field wiring.
• OEM Compatibility: Exact-fit replacement for A.O. Smith 100109896 and Lochinvar 1102R, maintaining UL/CSA listing integrity.
• Manual Reset Safety: Hard-limit protection prevents equipment damage by requiring manual intervention after a high-temperature excursion.
• Industrial-Grade Construction: Built to withstand the harsh ambient temperatures of demanding mechanical rooms and boiler skids.

What is the temperature range for the operating control?
The adjustable operating control typically ranges from 100°F to 240°F, though technicians should verify specific setpoints based on the water heater or boiler model requirements.

Does this unit replace the old 1102R model?
Yes, the 100109896 is the direct superseding part number for the legacy 1102R dual control used in many older commercial installations.

Can this be used for both gas-fired and electric commercial heaters?
This immersion control is utilized across various fuel types where a sensing bulb can be inserted into a well to monitor fluid temperature.

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.