Lochinvar & A.O. Smith 100208504 Relay

The Lochinvar & A.O. Smith 100208504 Relay is a critical 24V control component designed for high-performance integration within Copper-Fin CB/CW 497-747 boiler and water heater systems. As a direct OEM replacement relay, this unit is technically identical to the RLY2424 and RLY2424K, ensuring a seamless drop-in fit for technicians servicing commercial heating equipment. Engineered for heavy-duty HVAC system management, this 24 volt relay manages low-voltage signals to command essential subsystems like primary pumps and igniters, preventing electrical overloads that can compromise board logic. By maintaining precise switching cycles, the 100208504 optimizes the energy profile of the unit and stabilizes the firing sequence. Transitioning to this genuine Lochinvar relay prevents the communication errors often seen with generic 24V alternatives, providing the reliability required in high-demand mechanical rooms.

• Universal Compatibility: Validated for the full range of Copper-Fin CB/CW 497 - 747 models, ensuring exact electrical matching.
• OEM Specifications: Exact replacement for RLY2424 and RLY2424K, eliminating the need for field wiring modifications.
• System Protection: Acts as a robust buffer between the control board and high-draw components to reduce the risk of board failure.
• Efficient Switching: Provides high-cycle 24V switching performance to maintain consistent igniter and pump operation.

Common Questions

Is the 100208504 relay interchangeable with the RLY2424?
Yes, the 100208504 is the current OEM part number and is technically identical to the RLY2424 and RLY2424K. It functions as a direct substitute without requiring additional hardware.

What are the symptoms of a failing 24V relay in Copper-Fin boilers?
Technicians typically observe intermittent pump operation or failed ignition sequences. If the control board sends 24V but the component downstream does not engage, the relay contacts are likely pitted or stuck.

Can I use this relay for pump control on a 100208504 application?
While this is a general-purpose 24V relay, always verify your specific wiring diagram. This part is frequently used for pump and igniter circuit management across the 497-747 series.

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.