Williams 8939 Conversion Kit

Engineered for professional field conversion, the Williams 8939 kit allows for a seamless transition from natural gas to propane (LP) specifically for the Williams 14038 series. This direct vent furnace conversion kit is critical for maintaining the stoichiometric balance and manifold pressure requirements of the 14,000 BTU gravity direct vent furnace when switching fuel sources. As an OEM Williams furnace part, the 8939 ensures that the orifice sizing and regulator adjustments meet factory specifications to prevent soot accumulation or inefficient combustion cycles. This LP gas conversion provides the necessary hardware to modify the burner assembly, ensuring the pilot and main burner operate safely under the higher energy density of liquid propane. For techs servicing rural jobsites or off-grid installations where natural gas infrastructure is unavailable, this Williams 8939 conversion kit is the mandatory solution for adapting the 14038 series without replacing the entire heating system.

Key Technical Benefits

• Precision Orifice Machining: Ensures correct BTU output and flame characteristics for 14,000 BTU Williams 14038 series models.
• Direct Vent Compatibility: Maintains the sealed combustion Integrity required for gravity direct vent furnaces.
• OEM Standards: Utilizes factory-spec components to match the original appliance certification and manifold pressure settings.
• Field Reliability: Designed for high-altitude or remote propane gas conversion applications where fuel versatility is required.

Field FAQ

Can the Williams 8939 be used on higher BTU 140 series models?
No, this specific kit is calibrated and sized specifically for the 14,000 BTU 14038 series. Using this on higher BTU units will result in under-firing and poor heat exchange performance.

Does this kit include the regulator spring and burner orifice?
Yes, the Williams 8939 is a comprehensive natural gas to propane kit containing the essential components required for a standard field conversion on the 14038 series.

Is a manometer required for installation?
Yes, a licensed technician should always use a manometer to verify the 10.0" W.C. manifold pressure required for propane operation after installing this kit.

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.