Modine 3H0346700012 Conversion Kit

When you are tasked with a fuel conversion on a Modine unit heater, the Modine 3H0346700012 NAT TO LP Conversion Kit is the essential OEM component for a safe and professional transition. This kit is the direct engineering replacement for the legacy 3H034670-12 part number, ensuring seamless HVAC unit heater fuel conversion without the need for field modifications or generic workarounds. Designed specifically for Modine heating systems, it allows technicians to convert natural gas equipment to liquid propane while maintaining precise manifold gas pressure and combustion efficiency at standard elevations (0–2,000 feet).

As a seasoned contractor, you know that Modine replacement parts must align perfectly with the existing gas train. This gas heater propane conversion kit includes the calibrated LP gas orifices, a high-quality regulator conversion spring, and the required rating plate labels to ensure the unit remains compliant with local codes. How to convert a Modine heater to propane? Simply follow the included technical instructions to swap the burner orifices and adjust the gas valve regulator to the specified W.C. (water column) for liquid propane operation. This is not a universal kit; it is a dedicated solution for professionals demanding reliability and heater manifold pressure adjustment accuracy.

• Direct OEM Replacement: Engineered specifically to supersede the obsolete 3H034670-12, ensuring a high-tolerance fit for Modine unit heater conversion projects.
• Complete Gas Train Solution: Includes all necessary liquid propane orifices and spring kits to modify the regulator for stable fuel delivery.
• Combustion Integrity: Maintains the original equipment's performance specifications by providing the exact orifice drill size required for LP BTU ratings.
• Regulatory Compliance: Comes with mandatory conversion rating plate labels to reflect the new fuel type and manifold pressure on the unit chassis.

Is this kit compatible with all Modine heaters?
No, Modine 3H0346700012 compatibility is specific to certain model series and control codes. Always verify your heater's model and serial number against the manufacturer’s service bulletin before installation.

What is the proper manifold pressure for this kit?
Typically, for Modine LP conversions, the manifold pressure is set to 10 inches W.C., but you must confirm the specific requirements found in the included installation guide for your particular model.

Does this kit work for high-altitude installations?
This kit is designed for elevations between 0 and 2,000 feet. Installations exceeding this height require a high-altitude propane orifice kit to account for atmospheric pressure changes.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.