Fenwal 35-655910-991 Module Els PW 17895 The B1755917HDF is the current

The B1755917HDF is the current factory-authorized successor to the B1755917H

provided it is shielded from excessive vibration and maintained below the 176°F operating threshold

For technicians performing retrofits or repairs

and liquified petroleum gases

and UD series coils with 36 through 47 capacity ratings

Fenwal 35-655910-991 Module Els PW 17895 The B1755917HDF is the currentThe Fenwal 35 655910 991 is a robust 24 VAC Hot Surface Ignition (HSI) control module engineered for precise sequencing in gas fired furnaces, boilers, and commercial heating equipment. This micro processor based control manages the combustion blower, ignitor, and gas valve while providing continuous flame monitoring. Designed for field replacement and OEM applications, it features a 45 second prepurge and interpurge cycle to ensure the combustion