Lochinvar & A.O. Smith 100109856 Valve

The Lochinvar and A.O. Smith 100109856 is a sophisticated Smart Valve SV9570A2161183082-4 designed for precise gas flow control in high-efficiency commercial water heaters and boilers. This Honeywell SV9570 series valve integrates the ignition control and gas regulation into a single unit, facilitating a direct ignition system that eliminates the need for a standing pilot. Operating on a 24VAC control circuit, it manages the ignition sequence and main burner operation while ensuring safety via internal pressure regulation and redundant solenoids. Technicians should note the 1/2" NPT inlet and outlet connections, which are standard for many Lochinvar Knight and A.O. Smith Cyclone models. When diagnosing HVAC gas valve troubleshooting issues, this component provides reliable feedback to the integrated control board, ensuring consistent combustion efficiency and thermal performance. It is essential to verify the specific suffix on the SV9570 model number to ensure exact electrical and pressure specifications match the OEM requirements of the appliance.

• Integrated Ignition Logic: Combines gas regulation and ignition control into one direct ignition valve, reducing wiring complexity and potential failure points.
• Broad OEM Compatibility: Serves as a direct replacement part for several Lochinvar boiler parts and A.O. Smith commercial water heater configurations.
• Precision Regulation: Maintains consistent manifold pressure to optimize gas burner performance and fuel efficiency under varying load conditions.
• Safety Redundancy: Features dual internal valves to meet strict safety standards for commercial gas-fired equipment.

Is the 100109856 compatible with LP or Natural Gas?
This valve is typically configured for Natural Gas but may be converted using the manufacturer-specified orifice and spring kit. Always check the appliance data plate before installation.

Does this unit replace the older SV9501 series?
The SV9570 is a specific Honeywell Smart Valve iteration. While similar in appearance, internal logic and electrical ratings differ; always use the specific 100109856 part number for compatibility.

What are the common symptoms of a failing SV9570A valve?
Common indicators include failure to open after the ignition trial, intermittent flame loss, or physical damage to the integrated wiring harness connectors.

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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.