Siemens Building Technology GCA161.1U Actuator Els PW 29614 The Reznor 17890 Pilot Assembly

The Reznor 17890 Pilot Assembly is a critical OEM replacement part engineered for precise ignition and sustained burner performance in unit heaters and furnaces

Engineered as a robust dual stage gas valve

Always verify the model number of your unit or cross-reference the part number 4650RP before installation

Precision-machined components ensure zero backlash and accurate linear travel for tight proportional control

The inlet supports a 5/8" ODF (Sweat) or 1-1/8" ODM connection

Siemens Building Technology GCA161.1U Actuator Els PW 29614 The Reznor 17890 Pilot AssemblyThe Siemens GCA161. 1U is a high torque spring return rotary actuator engineered for precise control of building automation dampers and ball valves. Operating on a 24VAC supply, this OpenAir actuator utilizes a 0 10 VDC modulating signal to provide 142 lb in (16 Nm) of torque, ensuring reliable operation even in high static pressure systems. Its robust construction is designed for HVAC damper control applications requiring fail safe positioning during