Goodman LPM-06

Goodman LPM-06 LP Conversion Kit User Manual

For 2-Stage Gas Furnaces

Introduction

The Goodman LPM-06 LP Conversion Kit is designed to convert compatible 2-stage natural gas furnaces to operate on liquid propane (LP) gas. This kit includes the necessary components to safely and effectively modify your furnace's gas valve for LP fuel. Proper installation is critical for safe and efficient operation.

This manual provides essential information regarding the installation, operation, maintenance, and troubleshooting of the conversion kit. Please read all instructions carefully before proceeding with installation or use.

Safety Information

WARNING: Improper installation, adjustment, alteration, service, or maintenance can cause property damage, personal injury, or loss of life. Installation and service must be performed by a qualified installer, service agency, or the gas supplier.

  • Always turn off the main gas supply and electrical power to the furnace before beginning any installation or service.
  • Verify that the furnace model is compatible with the LPM-06 conversion kit.
  • Ensure all gas connections are properly sealed and tested for leaks after installation.
  • Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.
  • Follow all local codes and regulations for gas appliance installation.

Keep this manual in a safe place for future reference.

Package Contents

The Goodman LPM-06 LP Conversion Kit typically includes the following components:

  • LP Orifices (quantity may vary based on furnace model, typically 3-6)
  • Regulator Springs (for various gas valve models)
  • Instruction Sheet specific to the kit

Please verify all components are present and undamaged before beginning installation.

Setup and Installation

Professional installation is strongly recommended for this product due to the inherent risks associated with gas appliances.

  1. Preparation:
    • Turn off the main gas supply to the furnace.
    • Disconnect electrical power to the furnace at the circuit breaker.
    • Allow the furnace to cool completely if it has been operating.
    • Locate the furnace's gas valve and identify the natural gas orifices and regulator.
  2. Accessing Components:
    • Remove any access panels or covers required to reach the gas valve and burner assembly.
    • Carefully disconnect the gas line from the gas valve, being prepared for residual gas.
  3. Orifice Replacement:
    • Remove the existing natural gas orifices from the burner manifold.
    • Install the new LP orifices provided in the kit. Ensure they are securely tightened to prevent leaks. Refer to the furnace manufacturer's instructions for specific torque values.
  4. Regulator Spring Conversion:
    • Locate the pressure regulator on the gas valve.
    • Carefully remove the cap and replace the natural gas regulator spring with the appropriate LP spring from the kit. The kit may include springs for various gas valve models (e.g., Honeywell VR9205Q). Select the correct spring for your specific valve.
    • Replace the cap and ensure it is tightened properly.
  5. Reassembly and Leak Testing:
    • Reconnect the gas line to the gas valve.
    • Turn on the main gas supply.
    • Apply a leak detection solution (soap and water mixture) to all gas connections. Bubbles indicate a leak. If a leak is detected, turn off the gas supply immediately and tighten the connection. Re-test until no leaks are present.
    • Restore electrical power to the furnace.
  6. Combustion Adjustment:
    • After conversion, the furnace's combustion may need adjustment to ensure proper air-to-fuel ratio for LP gas. This typically involves adjusting the manifold pressure.
    • This step requires specialized tools and expertise. Consult the furnace manufacturer's service manual and use a manometer to set the correct manifold pressure for LP gas.

After successful conversion and adjustment, replace all access panels and covers.

Goodman LPM-06 LP Conversion Kit components

Image: The Goodman LPM-06 LP Conversion Kit, showing various components such as orifices and springs used for converting a natural gas furnace to propane.

Operating Instructions

Once the Goodman LPM-06 LP Conversion Kit has been correctly installed and the furnace has been adjusted for LP gas, the operation of your 2-stage gas furnace will remain largely the same as before the conversion.

  • Ensure the LP gas supply is open and the furnace's electrical power is on.
  • Set your thermostat to the desired heating mode and temperature.
  • The furnace will cycle on and off as needed to maintain the set temperature.
  • Listen for normal ignition and burner operation. Any unusual noises or smells should be investigated immediately.

Refer to your specific furnace's user manual for detailed operating instructions.

Maintenance

Regular maintenance is essential for the safe and efficient operation of your LP-converted furnace. While the LPM-06 kit itself requires no specific maintenance, the furnace it is installed in does.

  • Annual Professional Inspection: Have a qualified HVAC technician inspect and service your furnace annually. This includes checking gas pressure, burner operation, heat exchanger integrity, and overall system performance.
  • Filter Replacement: Regularly check and replace or clean the furnace air filter according to the furnace manufacturer's recommendations.
  • Ventilation: Ensure that the furnace area is clear of obstructions and has adequate ventilation.
  • Carbon Monoxide Detector: Install and regularly test carbon monoxide detectors in your home, especially near the furnace.
  • Gas Leak Checks: Periodically check gas connections for leaks using a soap and water solution, especially if you suspect a gas odor.

Troubleshooting

If your furnace is not operating correctly after the LP conversion, consider the following common issues:

Problem Possible Cause Solution
Furnace does not ignite or cycles off quickly. Incorrect LP manifold pressure, clogged LP orifice, gas supply issue, or improper regulator spring installation. Verify LP gas supply is open. Recheck orifice and regulator spring installation. Have a qualified technician check and adjust manifold pressure.
Smell of gas. Gas leak at connections or within the furnace. IMMEDIATELY turn off gas supply and electrical power. Ventilate the area. Do not operate any electrical switches. Contact a qualified technician or your gas supplier.
Poor heating performance or unusual flame. Incorrect manifold pressure, incorrect orifices, or other furnace issues. Contact a qualified technician to inspect and adjust the furnace's combustion.

For any issues beyond basic troubleshooting, contact a qualified HVAC professional.

Specifications

  • Model: LPM-06
  • Product Type: LP Conversion Kit
  • Compatibility: 2-Stage Gas Furnaces (Goodman and compatible models)
  • Fuel Type (After Conversion): Liquid Propane (LP)
  • Material: Brass (for orifices and certain components)
  • Item Weight: Approximately 0.15 Pounds
  • Manufacturer: Goodman
  • UPC: 076335104393, 783321956958
  • ASIN: B00PM93ZAQ

Warranty and Support

For specific warranty information regarding the Goodman LPM-06 LP Conversion Kit, please refer to the documentation included with your purchase or visit the official Goodman website. Warranty terms typically cover manufacturing defects.

For technical support, installation assistance, or to locate a qualified service technician, please contact Goodman customer service or visit their official support channels. Always provide your product model number (LPM-06) and furnace model number when seeking support.

Goodman is a registered trademark of Goodman Manufacturing Company, L.P.