the LF model uses a copper silicon alloy instead of standard bronze to comply with lead-free mandates

ensuring seamless mechanical integration without the need for field modifications or line-set adjustments

F open point to interrupt the burner circuit and a 150

strictly LP-only applications may require the "H" suffix models (M520H) depending on specific manifold pressure requirements

This cooling control features a specialized capillary tube length of 2000mm

Carrier HD52AR267 Motor 319825-402 the LF model uses aThe Carrier HD52AR267 is a high efficiency ECM Motor designed specifically for Carrier, Bryant, and Payne air handlers and furnaces requiring a 1 HP X13 motor replacement. Operating on 208 230V at 1050 RPM, this 1 phase constant torque motor utilizes a programmed electronic control module to maintain optimal airflow across varying static pressures. As a direct OEM replacement, it ensures the blower wheel achieves the precise CFM required by the heat