The 2659D-R is a TB2001 120V actuator

OEM Compatibility: Designed for use with Williams-brand gas valves for a seamless mechanical fit

or a "no flame" lockout code on the IFC

Key Benefits System Protection: Precisely monitors suction pressure to prevent compressor operation during low-refrigerant or restricted airflow scenarios

With a voltage rating of 440 VAC

Laars Heating Systems R2080201 Kit 321894-708 The 2659D-R is a TB2001The Laars Heating Systems R2080201 Kit is a field proven temperature control conversion kit engineered to transition existing FX05 controllers over to the more robust Watlow series. As a critical boiler control board upgrade, this kit resolves the obsolescence of the Laars 2400 439 part, ensuring that legacy hydronic systems maintain precise thermal regulation. For technicians managing commercial boiler maintenance, this FX05 to Watlow conversion