Lochinvar & A.O. Smith 100208495 Panel Mount

The Lochinvar & A.O. Smith 100208495 Relay Board Panel Mount is a critical electrical control component designed for high-demand hydronic and domestic hot water systems. Running on a standard 24Vac coil, this panel-mount relay provides reliable switching for essential peripheral hardware, including system pumps, fans, and auxiliary blowers. Rated for heavy-duty cycling, the 100208495 ensures precise voltage distribution, preventing intermittent signal loss that can lead to unexpected lockout or short-cycling. This OEM part is a direct, engineered replacement for legacy part numbers RLY2105 and RLY2105K, maintaining exact footprint and terminal alignment for a seamless swap. For technicians servicing Lochinvar Power-Fin boilers (models PB/PF 1501-2001) or A.O. Smith Cyclone water heaters, this board is the industry-standard solution for restoring reliable communication between the primary control module and high-voltage line loads. Its robust architecture is built to withstand the thermal stress and electrical noise common in commercial mechanical rooms.

• Direct OEM Compatibility: Specifically engineered to replace RLY2105 and RLY2105K without wiring modifications.
• High-Performance Switching: Designed to manage 24Vac control signals to activate higher-voltage system components like circulation pumps and draft inducers.
• Panel Mount Durability: Solid-state construction minimizes mechanical wear, ensuring a longer service life in high-cycle commercial HVACR applications.
• System Safety: Enhances energy efficiency and ensures the safety of the ignition sequence by maintaining stable electrical feedback to the main processor.

Is the 100208495 compatible with older RLY2105 units?
Yes, the 100208495 is the current manufacturer-designated replacement for the RLY2105 and RLY2105K relay boards, featuring identical technical specifications and mounting points.

What systems typically use this relay board?
This part is frequently found in Lochinvar Power-Fin heating boilers (1501-2001) and various A.O. Smith commercial water heating models that utilize 24Vac control logic.

Can I install this board myself?
Due to the technical requirements for testing and calibration, professional installation by a licensed HVAC technician or electrical contractor is required to ensure safe and correct operation.

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.