When it comes to reliable and efficient home heating, the Rheem Downflow Gas Furnace is a popular choice among homeowners and HVAC professionals. This comprehensive guide will cover the essential installation requirements for high-altitude installations, troubleshooting the flame sensor, and the key features and benefits of the Rheem Value Series 90 High Efficiency Downflow Gas Furnace.
What are the Installation Requirements for Rheem Downflow Gas Furnace at High Altitudes?
1. Altitude Considerations
- For installations above 2000 ft, the burner orifice size needs to be recalculated and verified to ensure proper combustion, as altitude affects air density and gas heating values.
- For Canadian installations, an optional derate (manifold gas pressure reduction) method may be used, but this is not applicable for U.S. installations.
2. High Altitude Kits
- High altitude kits may be required, which typically include a high altitude pressure switch assembly.
- The correct high altitude kit must be selected based on the furnace model number and input rates.
3. Venting Considerations
- Furnaces must be vented in accordance with the National Fuel Gas Code (NFGC) guidelines and local codes to prevent backdrafting and ensure safe operation.
4. Orifice Selection
- The burner orifice size must be adjusted according to the altitude, as furnaces shipped with specific orifice sizes may need to be adjusted to a smaller size for higher elevations.
- Consult the installation instructions for specific orifice selection and drill size calculations.
5. Compliance with Local Codes
- Always follow National Fuel Gas Code (NFGC) guidelines and local installation codes to ensure compliance and safety.
How to Troubleshoot the Flame Sensor in a Rheem Downflow Gas Furnace?
1. Identify the Issue
- Common issues with the flame sensor include a dirty or corroded sensor, incorrect installation, or a malfunctioning sensor.
- Symptoms may include the furnace not igniting, intermittent operation, or the furnace shutting down frequently.
2. Tools Required
- Multimeter
- Soft brush or cloth
- Replacement flame sensor (if necessary)
3. Step-by-Step Instructions
- Disconnect Power: Ensure the furnace is turned off and the power is disconnected to avoid electrical shock.
- Locate the Flame Sensor: Typically located near the burner assembly.
- Inspect and Clean: Use a soft brush or cloth to clean the flame sensor, ensuring it is free from soot, dust, or corrosion.
- Check Connections: Verify that the flame sensor is properly connected to the control board.
- Test the Sensor: Use a multimeter to check for continuity and proper voltage readings according to the manufacturer’s specifications.
- Replace if Necessary: If the flame sensor is damaged or malfunctioning, replace it with a new one, ensuring it is properly installed and connected.
What are the Key Features and Benefits of the Rheem Value Series 90 High Efficiency Downflow Gas Furnace?
1. Efficiency Ratings
- Up to 92.4% Annual Fuel Utilization Efficiency (AFUE), calculated in accordance with Department of Energy test procedures.
2. Innovative Technology
- Integrated control board managing all operational functions, including hookups for electronic air cleaners.
- Slow-opening gas valve and a specially designed inducer system for quiet operation.
3. Design and Configuration
- Low profile 34-inch design, lighter and easier to handle, with room for optional accessories.
- Top electrical connections, left or right gas and condensate drainage connections on downflow models.
4. Warranty Details
- Limited Lifetime warranty on the heat exchanger.
- Ten-year warranty on conditional parts (registration required).
5. Unique Selling Points
- Certified by CSA (Canadian Standards Association).
- Optional indoor or outdoor combustion air.
- Control board diagnostics for easier troubleshooting.
- Variety of cooling coils and plenums available as optional accessories for air conditioning models.
