Hearth & Home Technologies 842-4940
Hearth & Home Technologies 842-4940 Pilot Assembly
User Manual
Product Overview
The Hearth & Home Technologies Part #842-4940 is a complete replacement pilot assembly designed for Quadra-Fire and Heat N Glo gas stoves. This essential component ensures reliable ignition and operation of your gas appliance.
It includes all necessary parts for a comprehensive replacement:
- Thermocouple
- Thermopile
- Electrode with wire
- Pilot bracket
- Pilot hood
- Natural Gas (NG) and Propane (LP) injector orifices
This assembly is compatible with various models, including:
- Quadra-Fire Gas Stoves: Columbia Bay Free Standing (December 2003 and later), Columbia Bay Free Standing-B, Hudson Bay Free Standing, Topaz
- Heat N Glo Gas Stoves: Mission Bay, Tiara II-B, Tiara II-AL-C
Always refer to your specific appliance's owner's manual for exact part number verification and compatibility.
Components of the Pilot Assembly
Figure 1: Overview of the 842-4940 pilot assembly, showing the main bracket, pilot hood, and various wires including the thermocouple, thermopile, and electrode wire. The assembly is designed for gas stove ignition systems.
Figure 2: A closer look at the pilot assembly's top section, highlighting the thermocouple (thicker metal rod) and thermopile (multiple thin wires bundled), which are crucial for flame sensing and generating millivolts for the gas valve.
Figure 3: The pilot assembly with its various wires and tubes, including the spark electrode wire and the gas supply tube. Note the small orifices included for Natural Gas (NG) and Liquid Propane (LP) conversion.
Figure 4: A detailed perspective of the pilot assembly's base, showing the mounting bracket and the connection points for the thermocouple, thermopile, and electrode. This view emphasizes the robust construction of the components.
Installation and Setup
Safety First: Before attempting any installation or maintenance, ensure your gas appliance is completely shut off and disconnected from its gas supply. Allow the appliance to cool down if it has been in operation. It is recommended that installation be performed by a qualified technician.
Gas Type Conversion (NG to LP or LP to NG)
This pilot assembly comes pre-set for Natural Gas (NG) operation. If your appliance uses Liquid Propane (LP), you must change the injector orifice. The package includes a .35 LP orifice (part #200-2630) for this conversion.
- Locate the existing NG orifice on the pilot assembly. It is typically a small brass fitting.
- Carefully remove the NG orifice using an appropriate wrench or tool.
- Install the provided .35 LP orifice (part #200-2630) into the pilot assembly. Ensure it is securely tightened to prevent gas leaks.
- Verify all connections are tight and secure before restoring gas supply.
General Installation Steps
- Access the existing pilot assembly within your gas stove. This may require removing panels or grates.
- Carefully disconnect the thermocouple, thermopile, and electrode wires from the gas valve and ignition module. Note their original positions for correct re-connection.
- Unscrew or unclip the old pilot assembly from its mounting bracket.
- Mount the new 842-4940 pilot assembly in the same location and orientation as the old one.
- Reconnect the thermocouple, thermopile, and electrode wires to their respective terminals on the gas valve and ignition module. Ensure connections are clean and secure.
- Once installed, perform a leak test on all gas connections using a gas leak detection solution.
- Restore gas supply and test the pilot ignition and main burner operation according to your appliance's owner's manual.
Operating Instructions
The pilot assembly is a critical component of your gas stove's ignition system. Its proper function ensures safe and reliable operation.
Pilot Ignition
After installation and gas supply restoration, follow your gas stove's specific instructions for lighting the pilot. This typically involves:
- Turning the gas control knob to the "Pilot" position.
- Pressing and holding the knob to allow gas to flow to the pilot.
- Activating the igniter (either a push-button piezo igniter or a manual lighter) to spark the pilot flame.
- Continuing to hold the knob for a specified duration (e.g., 30-60 seconds) to allow the thermocouple/thermopile to heat up and generate enough voltage to hold the gas valve open.
- Releasing the knob. The pilot flame should remain lit. If it extinguishes, repeat the process.
Main Burner Operation
Once the pilot is lit, you can turn the gas control knob to the "On" position to ignite the main burner. The pilot flame will ignite the gas flowing to the main burner.
Maintenance
Regular inspection of your pilot assembly can help ensure its longevity and safe operation. It is recommended to have your gas appliance inspected annually by a qualified service technician.
- Pilot Flame Inspection: Observe the pilot flame. It should be strong, steady, and blue, with a small yellow tip. A weak, flickering, or entirely yellow flame may indicate a dirty orifice or other issues.
- Cleaning: Periodically, gently clean any dust or debris from the pilot hood and around the thermocouple/thermopile using a soft brush or compressed air. Ensure the pilot orifice is clear.
- Wire Connections: Check that all electrical connections (thermocouple, thermopile, electrode) are secure and free from corrosion.
- Component Wear: Over time, components like the thermocouple and thermopile can wear out, leading to intermittent pilot outages. If issues persist after cleaning, replacement may be necessary.
Troubleshooting
If you experience issues with your pilot assembly, consider the following common troubleshooting steps. Always ensure gas supply is on and other appliance components are functioning correctly before troubleshooting the pilot assembly.
| Problem | Possible Cause | Solution |
|---|---|---|
| Pilot will not light or stay lit. |
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| Pilot lights but main burner does not ignite. |
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| Pilot flame is yellow or sooty. |
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If problems persist after attempting these steps, it is strongly recommended to contact a certified gas appliance technician for diagnosis and repair.
Specifications
| Attribute | Detail |
|---|---|
| Part Number | 842-4940 |
| Compatibility | Quadra-Fire and Heat N Glo Gas Stoves (specific models listed in Product Overview) |
| Gas Type | Natural Gas (NG) or Liquid Propane (LP) - includes LP orifice for conversion |
| Included Components | Thermocouple, Thermopile, Electrode with wire, Pilot bracket, Pilot hood, NG and LP injector orifices |
| Item Weight | 1.2 pounds |
| Package Dimensions | 10.9 x 5.4 x 1.5 inches |
| Manufacturer | Hearth & Home Technologies |
| Date First Available | August 11, 2015 |
Warranty and Support
As a replacement part, the 842-4940 pilot assembly is manufactured to high standards by Hearth & Home Technologies. Specific warranty details for replacement parts may vary and are typically covered under the original appliance's warranty or a limited parts warranty from the manufacturer or seller.
For detailed warranty information or technical support, please refer to the documentation provided with your original Quadra-Fire or Heat N Glo gas stove, or contact Hearth & Home Technologies directly through their official website or customer service channels. When contacting support, please have your appliance model number and the pilot assembly part number (842-4940) ready.
Note: Use of non-original or generic parts may void your appliance's warranty. This product is an original Hearth & Home Technologies part.