Description
Rheem-Ruud SP20117 Vacuum Switch — Low NOx Blower
The Rheem-Ruud SP20117 is an OEM replacement vacuum switch designed specifically for Low NOx blower applications in Rheem and Ruud heating systems. This critical safety component monitors negative pressure (vacuum) generated by the inducer blower assembly, ensuring proper venting and combustion conditions are established before the ignition sequence proceeds.
Key Features
- OEM Rheem-Ruud replacement part — direct fit for compatible models
- Engineered for Low NOx furnace and heating system applications
- Monitors inducer blower vacuum to verify safe venting conditions
- Prevents ignition if adequate draft pressure is not achieved
- Helps maintain system efficiency and combustion safety
- Durable construction for long-term, reliable operation
Application
The SP20117 vacuum switch is a safety device used in Rheem and Ruud Low NOx furnaces and heating appliances. It works in conjunction with the inducer blower to confirm that the flue venting path is clear and that sufficient negative pressure exists prior to allowing the burner to fire. This safeguard protects against incomplete combustion and potential carbon monoxide hazards.
Installation Notes
- Intended for use by qualified HVAC technicians
- Verify compatibility with your specific Rheem or Ruud model before installation
- Consult the equipment service manual for proper wiring and pressure tubing connections
- Always follow local codes and manufacturer guidelines during installation
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