Johnson Controls is a leading manufacturer of gas furnaces, known for their reliable performance and advanced features. These furnaces are designed to provide efficient and safe heating for residential and commercial spaces. In this comprehensive guide, we will explore the specific safety precautions, common issues that may void the warranty, and a comprehensive maintenance schedule for your Johnson Controls gas furnace.
What are the Specific Safety Precautions for Operating a Johnson Controls Gas Furnace?
1. Approved Fuel Use
- Only use the fuel specified in the instructions, which is typically natural gas or propane (LP) gas.
2. Installation and Location
- Install the furnace in the location and position as specified in the instructions.
- Ensure the furnace is not installed in a residential garage unless it is installed according to specific guidelines.
- Provide adequate combustion and ventilation air to the furnace space.
3. Venting
- Connect the furnace to an approved vent system as specified in the instructions.
- Ensure the combustion products are discharged outdoors.
4. Gas Leaks
- Test for gas leaks as specified in the instructions.
- If you smell gas, follow the emergency procedures immediately.
5. Operational Guidelines
- Ensure the furnace operates within its intended temperature rise range.
- Do not allow the return air temperature to be below 55°F (13°C) for extended periods to prevent condensation and premature heat exchanger failure.
- Never operate the furnace without all access doors installed.
6. Emergency Procedures
- If you smell gas, do not try to light any appliance, touch any electrical switch, or use a phone in the building.
- Leave the building immediately and call your gas supplier or the fire department from a neighbor’s phone.
7. Shutting Off the Furnace
- If you suspect a malfunction, turn off the manual gas valve before turning off the electrical supply to prevent a fire or explosion.
What are the Common Issues That May Void the Warranty?
1. Improper Installation
- Failure to follow the installation instructions can void the warranty. Only a qualified contractor, installer, or service agency should install the product.
2. Maintenance Failures
- Failure to perform regular maintenance, such as cleaning the furnace, ductwork, and components, and replacing air filters, can void the warranty.
3. Unauthorized Modifications
- Any unauthorized modifications, including drilling out gas orifices, can cause misalignment of burner flames, leading to premature heat exchanger burnout, high levels of carbon monoxide, and other hazards, which would void the warranty.
4. Use of Unapproved Fuel
- Burning any unapproved fuel can damage the furnace heat exchanger and void the warranty.
What is the Comprehensive Maintenance Schedule for a Johnson Controls Gas Furnace?
1. Frequency of Inspections
- Inspect the furnace annually before the heating season begins.
2. Specific Tasks
- Combustion Air & Venting: Ensure proper ventilation and combustion air supply.
- Filter Maintenance: Replace air filters regularly, especially after construction is completed if the furnace was used during construction.
- General Inspection: Check for any signs of damage, corrosion, or leaks. Inspect the vent system and ensure it is properly connected and functioning.
- Blower and Igniter: Inspect the blower and igniter for proper operation. Clean or replace as necessary.
3. Recommended Tools and Products
- Use a U-tube manometer or digital equipment to measure gas line and manifold pressures.
- Use a thermometer to read supply and return air temperatures.
- Use flexible tubing and adapters for connecting pressure measuring equipment.
4. Measurements and Calculations
- Measure the gas line and manifold pressures to ensure they are within the specified range.
- Check the supply and return air temperatures to ensure they are within the acceptable range.
5. Preventing Corrosion and Leaks
- Ensure the furnace area is kept clear and free of combustible materials.
- Regularly inspect and clean the furnace, ductwork, and components to prevent corrosion and ensure proper airflow.
