Johnson Controls D-9502-12 Positioner

The Johnson Controls D-9502-12 Pneumatic Positioner is a critical component for achieving precise control over damper actuator positioning in demanding HVACR environments. Designed specifically for integration with the D-4073 series actuators, this positioner eliminates hysterisis and ensures accurate response to control signals by overcoming linkage friction and heavy airflow loads. It features an adjustable starting point ranging from 2 to 12 PSI and an adjustable operating span of 3 to 13 PSI, providing technicians with the flexibility to calibrate the sequence of operation for specific zoning requirements. The unit is equipped with versatile air connections, including 5/32" or 1/4" OD barb fittings, facilitating seamless integration into existing pneumatic control systems. This pilot positioner is essential for maintaining linear stroke and high-force output in HVAC pneumatic damper applications, ensuring optimal air mixing and pressure control in commercial air handling units.

• Precise Modulation: Provides linear positioning of the actuator regardless of variables like friction or line pressure drops.
• Field Adjustability: Independent adjustment for start point and span allows for custom sequencing in complex pneumatic loops.
• Compatibility: Engineered direct-mount design for Johnson Controls D-4073 pneumatic actuators ensures a stable mechanical interface.
• Durable Construction: Built to withstand commercial mechanical room environments while maintaining sensitive calibration settings.
• Reduced Hysteresis: Significantly improves response time and accuracy compared to non-positioned pneumatic setups.

What is the primary function of the D-9502-12?
It acts as a relay that compares the control signal from the thermostat to the actual position of the actuator, ensuring the damper moves exactly as commanded despite external forces.

Can I use this with 5/32" tubing?
Yes, the dual-sized barb fittings are compatible with both 5/32" and 1/4" OD plastic tubing, making it a drop-in replacement for legacy systems.

How do I adjust the span and start point?
Adjustments are made via the internal calibration screws, allowing you to set the damper to begin opening at a specific signal pressure (starting point) and reach full travel at a higher pressure (span).

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.