Lochinvar & A.O. Smith 100171985 Valve
The Lochinvar & A.O. Smith 100171985 Gas Valve Assembly is a critical combustion control component engineered for precise fuel regulation in high-efficiency commercial water heaters and condensing boilers. Designed to maintain the stoichiometric balance required for optimal thermal efficiency, this natural gas valve utilizes a 24V or 120V solenoid actuator (depending on specific model series) to manage gas flow to the burner assembly. As an OEM direct replacement part, it ensures seamless integration with the factory ignition control module, preventing "flame failure" lockouts and ensuring consistent manifold pressure during the ignition sequence.
For technicians servicing A.O. Smith Cyclone or Lochinvar Knight series units, this assembly features a robust body construction capable of handling the negative pressure requirements of modern power-vented systems. The 100171985 valve is essential for resolving common service issues such as intermittent ignition, gas-to-air ratio imbalances, or failed internal solenoids. Proper installation requires a calibrated manometer to verify inlet and outlet pressures against manufacturer specifications for safe HVACR system operation.
Key Benefits- Ensures precise gas flow regulation for high-efficiency boiler maintenance.
- Supports negative pressure operation common in condensing water heaters.
- Direct OEM compatibility for A.O. Smith and Lochinvar equipment.
- Heavy-duty solenoid construction designed for high-cycle industrial applications.
- Mitigates risks of ignition failure and erratic burner behavior.
Is this valve compatible with LP (Propane) systems?
This specific SKU is configured for natural gas. For propane applications, a dedicated conversion kit or an LP-specific valve assembly must be used to ensure correct orifice sizing and spring tension.
How do I troubleshoot an E421 or ignition lockout on this valve?
Technicians should verify 24V/120V signals at the terminal block during the ignition trial. If voltage is present but no gas flow is detected via manometer at the outlet port, the internal solenoid has likely failed.
Does this assembly include the flange gaskets?
While some kits vary, it is standard practice to inspect and replace all gas valve gaskets and seals during installation to prevent hazardous leaks in the combustion chamber.
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.
Original: $508.53
-65%$508.53
$177.99Lochinvar & A.O. Smith 100171985 Valve
The Lochinvar & A.O. Smith 100171985 Gas Valve Assembly is a critical combustion control component engineered for precise fuel regulation in high-efficiency commercial water heaters and condensing boilers. Designed to maintain the stoichiometric balance required for optimal thermal efficiency, this natural gas valve utilizes a 24V or 120V solenoid actuator (depending on specific model series) to manage gas flow to the burner assembly. As an OEM direct replacement part, it ensures seamless integration with the factory ignition control module, preventing "flame failure" lockouts and ensuring consistent manifold pressure during the ignition sequence.
For technicians servicing A.O. Smith Cyclone or Lochinvar Knight series units, this assembly features a robust body construction capable of handling the negative pressure requirements of modern power-vented systems. The 100171985 valve is essential for resolving common service issues such as intermittent ignition, gas-to-air ratio imbalances, or failed internal solenoids. Proper installation requires a calibrated manometer to verify inlet and outlet pressures against manufacturer specifications for safe HVACR system operation.
Key Benefits- Ensures precise gas flow regulation for high-efficiency boiler maintenance.
- Supports negative pressure operation common in condensing water heaters.
- Direct OEM compatibility for A.O. Smith and Lochinvar equipment.
- Heavy-duty solenoid construction designed for high-cycle industrial applications.
- Mitigates risks of ignition failure and erratic burner behavior.
Is this valve compatible with LP (Propane) systems?
This specific SKU is configured for natural gas. For propane applications, a dedicated conversion kit or an LP-specific valve assembly must be used to ensure correct orifice sizing and spring tension.
How do I troubleshoot an E421 or ignition lockout on this valve?
Technicians should verify 24V/120V signals at the terminal block during the ignition trial. If voltage is present but no gas flow is detected via manometer at the outlet port, the internal solenoid has likely failed.
Does this assembly include the flange gaskets?
While some kits vary, it is standard practice to inspect and replace all gas valve gaskets and seals during installation to prevent hazardous leaks in the combustion chamber.
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.
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Description
The Lochinvar & A.O. Smith 100171985 Gas Valve Assembly is a critical combustion control component engineered for precise fuel regulation in high-efficiency commercial water heaters and condensing boilers. Designed to maintain the stoichiometric balance required for optimal thermal efficiency, this natural gas valve utilizes a 24V or 120V solenoid actuator (depending on specific model series) to manage gas flow to the burner assembly. As an OEM direct replacement part, it ensures seamless integration with the factory ignition control module, preventing "flame failure" lockouts and ensuring consistent manifold pressure during the ignition sequence.
For technicians servicing A.O. Smith Cyclone or Lochinvar Knight series units, this assembly features a robust body construction capable of handling the negative pressure requirements of modern power-vented systems. The 100171985 valve is essential for resolving common service issues such as intermittent ignition, gas-to-air ratio imbalances, or failed internal solenoids. Proper installation requires a calibrated manometer to verify inlet and outlet pressures against manufacturer specifications for safe HVACR system operation.
Key Benefits- Ensures precise gas flow regulation for high-efficiency boiler maintenance.
- Supports negative pressure operation common in condensing water heaters.
- Direct OEM compatibility for A.O. Smith and Lochinvar equipment.
- Heavy-duty solenoid construction designed for high-cycle industrial applications.
- Mitigates risks of ignition failure and erratic burner behavior.
Is this valve compatible with LP (Propane) systems?
This specific SKU is configured for natural gas. For propane applications, a dedicated conversion kit or an LP-specific valve assembly must be used to ensure correct orifice sizing and spring tension.
How do I troubleshoot an E421 or ignition lockout on this valve?
Technicians should verify 24V/120V signals at the terminal block during the ignition trial. If voltage is present but no gas flow is detected via manometer at the outlet port, the internal solenoid has likely failed.
Does this assembly include the flange gaskets?
While some kits vary, it is standard practice to inspect and replace all gas valve gaskets and seals during installation to prevent hazardous leaks in the combustion chamber.
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.
