Armstrong Furnace ALPKT574-2 Conversion Kit

The Armstrong Furnace ALPKT574-2 LP Conversion Kit is a field-installed component engineered to convert high-efficiency gas furnaces from natural gas to liquid propane. Designed specifically for Armstrong Air and AirEase 95% and 96% AFUE gas furnaces, this kit ensures precise orifice sizing and pressure regulation required for safe LP operation. The kit typically utilizes a White-Rodgers or Honeywell gas valve conversion mechanism, including the necessary #57 drill size burner orifices and a heavy-duty regulator spring. For HVAC contractors, this LP gas conversion kit simplifies the transition for residential units, maintaining optimal manifold pressure to prevent carboning or incomplete combustion. Proper installation requires a calibrated manometer to verify that the low pressure gas system meets manufacturer specifications for BTU input and heat exchanger longevity. Relying on OEM Armstrong furnace parts ensures that the flame rectification remains stable across all heat cycles.

Technical Specifications and Benefits

• System Compatibility: Engineered for use with single-stage gas valves in 90%+ AFUE furnace models.
• Precision Orifices: Includes LP burner orifices specifically calibrated for the energy density of liquid propane.
• Pressure Regulation: Contains a high-tensile regulator spring to maintain steady manifold pressure.
• OEM Integrity: Maintains the factory-certified safety ratings of the appliance when installed by a professional.
• Installation Components: Comes with necessary conversion decals and hardware for compliant field modification.

Common Questions for Technicians

What manifold pressure is required after installing the ALPKT574-2?
Standard propane manifold pressure should generally be set to 10" W.C., but always verify against the specific furnace rating plate and the instructions included with the LP conversion kit.

Can this kit be used on two-stage Armstrong furnaces?
No, the ALPKT574-2 is designed for specific single-stage furnace models. Two-stage units require a different kit to accommodate the high and low-fire gas valve settings.

Is a combustion analysis necessary after conversion?
Yes, performing a combustion analysis is critical to ensure proper CO levels and O2 percentages, confirming that the LP gas conversion was successful and the unit is operating safely.

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.