alkylbenzene refrigeration oil is not compatible with HFC refrigerants like R-410A

Cross-Compatibility: Seamlessly replaces RSS-495-167 and NS2-0167-00 models

Flare connections allow for faster replacement in the field without the risk of heat damage to the internal core or the need for a nitrogen purge during installation

What is the primary difference between the 1609-90 and standard controllers

Fenwal 35-665936-111 Control Els PW 17895 alkylbenzene refrigeration oil is notThe Fenwal 35 665936 111 is a robust 24VAC Direct Spark Ignition (DSI) control module engineered for precise burner management in commercial and residential heating applications. Operating with a 15 second pre purge period, this microprocessor based controller ensures a clean combustion chamber before initiating the ignition sequence. It features a 4 second Trial for Ignition (TFI) and is configured for 3 ignition trials, providing reliable flame