Lennox 24W51 Pressure Switch Freon Zerol 200TD is preferred by

Zerol 200TD is preferred by Copeland for field service due to its specialized additive package

a hard start kit is highly recommended to assist the compressor during startup against the pressure differential maintained by the TXV

the Reznor 99247 is strictly a NAT TO LP conversion kit

Is this required for shaded installations

Ensure the top 1/2-inch of the tip is engulfed in the flame for peak output

Lennox 24W51 Pressure Switch Freon Zerol 200TD is preferred byThe Lennox 24W51 Pressure Switch is a critical safety component designed for two stage high efficiency gas furnaces. This dual stage pressure switch is calibrated to monitor combustion air blower performance, ensuring the system operates within specific Inches Water Column (WC) parameters. Featuring set points of . 65" WC and 1. 15" WC, this assembly prevents unsafe ignition by verifying that the inducer motor is moving sufficient air to clear flue