Converting a DESA CGN181 gas heater from natural gas to propane is a straightforward process, but it requires attention to detail and the use of the correct conversion kit. This comprehensive guide will walk you through the step-by-step process, providing technical specifications and expert insights to ensure a safe and successful conversion.
Gather the Necessary Tools and Materials
To convert your DESA CGN181 gas heater to propane, you will need the following tools and materials:
- Conversion Kit: The PC-DVF36TPSTNA Conversion Kit Natural Gas to Propane LPG is specifically designed for the DESA CGN181 model. This kit includes the following components:
- LPG Gas Pilot Orifice
- LPG Gas Main Burner Orifice
-
LPG Gas Adjustable Regulator
-
Tools:
- Wrench
- Screwdriver
- Pressure gauge
Turn Off the Gas Supply and Remove the Burner Assembly
-
Turn Off the Gas Supply: Before starting the conversion process, turn off the gas supply to the heater and allow it to cool down completely.
-
Remove the Burner Assembly: Unscrew the mounting screws and carefully remove the burner assembly, taking care not to damage any components.
Replace the Orifices
-
Replace the Pilot Orifice: Using the LPG Gas Pilot Orifice from the conversion kit, replace the existing natural gas pilot orifice. The propane orifice will have a smaller diameter to accommodate the higher energy content of propane.
-
Replace the Main Burner Orifice: Similarly, replace the natural gas main burner orifice with the LPG Gas Main Burner Orifice from the conversion kit. The propane orifice will also have a smaller diameter.
-
Tighten the Orifices: Ensure that both the pilot and main burner orifices are tightened securely to prevent any gas leaks.
Install the New Regulator
- Install the LPG Gas Adjustable Regulator: The conversion kit includes an LPG Gas Adjustable Regulator, which is designed to regulate the pressure of the propane gas to match the requirements of the DESA CGN181 heater. Install this regulator according to the manufacturer’s instructions.
Reassemble the Burner Assembly
- Reassemble the Burner Assembly: Carefully reassemble the burner assembly, making sure that all components are securely fastened.
Check for Gas Leaks
- Check for Gas Leaks: Before turning on the gas supply, use a soapy water solution to check for any gas leaks at all the connections. Look for bubbles, which would indicate a leak. If you find any leaks, tighten the connections or replace any faulty components.
Turn On the Gas Supply and Adjust the Pressure
-
Turn On the Gas Supply: Once you have confirmed that there are no gas leaks, turn on the gas supply to the heater.
-
Adjust the Pressure: Use the LPG Gas Adjustable Regulator to adjust the pressure of the propane gas to match the requirements of the DESA CGN181 heater. Refer to the manufacturer’s specifications for the correct pressure range.
Test the Heater
- Test the Heater: After completing the conversion, test the heater to ensure that it is operating correctly and safely. Observe the flame pattern, check for any unusual noises or odors, and monitor the overall performance.
It is important to note that converting a gas heater from natural gas to propane should be done by a qualified professional. If you are not experienced in this type of conversion, it is recommended to hire a professional to ensure the conversion is done safely and correctly.
Technical Specifications
LPG Gas Pilot Orifice
The LPG Gas Pilot Orifice is designed to regulate the flow of propane gas to the pilot light. The orifice size is typically smaller than the natural gas orifice, with a diameter of approximately 0.012 inches (0.30 mm) to account for the higher energy content of propane.
LPG Gas Main Burner Orifice
The LPG Gas Main Burner Orifice is designed to regulate the flow of propane gas to the main burner. The orifice size is typically smaller than the natural gas orifice, with a diameter of approximately 0.035 inches (0.89 mm) to account for the higher energy content of propane.
LPG Gas Adjustable Regulator
The LPG Gas Adjustable Regulator is designed to regulate the pressure of propane gas to match the requirements of the DESA CGN181 heater. The regulator should be adjustable to allow for fine-tuning of the gas pressure, with a typical operating range of 11 to 14 inches of water column (wc) for propane gas.