Honeywell Q209A-1030 Auxiliary Potentiometer Motor Mounting

The Honeywell Q209A‑1030 is a 300‑ohm manual potentiometer designed to work with Honeywell Modutrol motors. It’s used primarily to set or limit the minimum position of a proportioning Modutrol motor in HVAC control systems.

📝 Key Functions

• Sets the minimum damper or valve position on Modutrol motors.
• Can control one or two motors in unison or sequentially.
• Mounts internally on compatible Modutrol IV motors (various models like M944, M945, M954, M955, M744, M745, M941, etc.).
• Provides a 300‑ohm resistance adjustment range.
• Often includes lead wires, bracket, and an SPST on/off switch depending on the version.

📦 Typical Use Cases

• Commercial HVAC systems
• Damper or valve minimum‑position control
• Coordinated operation of multiple Modutrol motors