a dedicated multi-stage controller is required

Check for a temperature differential of more than 3°F between the permanent suction line and the suction line from the evaporator

using this HVAC expansion valve replacement ensures the system operates within original manufacturing tolerances for efficiency and capacity

as it includes the necessary EDR terminal required for advanced configurations

Fenwal 35-605501-003 Control Els PW 17895 a dedicated multi-stage controller isThe Fenwal 35 605501 003 is a microprocessor based Direct Spark Ignition (DSI) control engineered for precision timing and reliable burner operation in gas fired appliances. This 24VAC module features a single trial ignition sequence (1 try) with a 7 second trial for ignition (TFI) and a 0 second pre purge, making it an ideal choice for systems requiring immediate spark response. Built for heavy duty HVACR applications, it utilizes DETECT A FLAME