This crankarm is specifically designed to mount onto 7/16-inch or 1/2-inch diameter damper shafts using a standard set-screw or bolt-tightening mechanism

it ensures exact mounting and electrical compatibility

This model is a relieving type

the Fenwal 35-605939-337 is designed for both local and remote flame sensing

This venter shroud is designed for Reznor HRP and HRPB models with capacities between 125 and 350 MBH

Fenwal 35-703914-009 Control Board Freon This crankarm is specifically designedThe Fenwal 35 703914 009 is a 24VAC Micro Purge Multi Trial Integrated Ignition Control designed for direct spark ignition (DSI) systems in commercial and residential HVACR applications. This Fenwal ignition module features a 15 second pre purge period followed by a 7 second trial for ignition (TFI). If the flame is not sensed via the flame rectification circuit, the control board is programmed for three ignition attempts before entering a 1 hour