Johnson Controls VA-7482-8201-RA Valve Actuator for Proportional Control

The Johnson Controls VA-7482-8201-RA is a compact linear electric valve actuator designed for proportional (modulating) control in HVAC applications like fan coil units and chilled ceilings.

It features a “Reverse Acting” (RA) configuration and uses an innovative auto-stroke detection system to calibrate itself to various valve types automatically.

Technical Specifications

• Control Type: Proportional with a 0–10 VDC signal and position feedback.
• Actuator Force: Provides a linear force of 160 N.
• Power Supply: Operates on 24 VAC/VDC.
• Speed/Timing: Features an 8-second full-stroke operating time.
• Protection: Rated IP54 for high resistance to dust and splashing water.
• Connection: Uses a standard M30 x 1.5 threaded coupling for field mounting.
• Cable: Typically includes a 2-meter, halogen-free pre-installed cable.

Key Features

• Auto Stroke Detection: This feature allows the actuator to adjust automatically to the variable strokes of terminal unit valves and pressure-independent control valves (PICV).
• Reverse Acting (RA): Specifically configured to act in reverse of the standard control signal (typically extending the stem as the signal decreases).
• Status Indicators: Proportional models like this one are equipped with a bi-color green/red LED to provide real-time operating status and diagnostic information.
• DIP Switches: Includes six internal DIP switches that allow users to configure specific operating parameters in the field.