Introduction
This manual provides essential information for the safe and efficient installation, operation, and maintenance of the Belimo GRX24-MFT-T N4 Valve Actuator. Please read this manual thoroughly before attempting any procedures to ensure proper functionality and to prevent damage or injury.
The Belimo GRX24-MFT-T is a non-spring return valve actuator designed for precise control in various industrial applications. It operates on 24V and features Multi-Function Technology (MFT) with a NEMA 4 enclosure rating, indicating its suitability for outdoor use and protection against windblown dust and rain.
Safety Information
WARNING:
- Always disconnect power before installing, servicing, or removing the actuator.
- Installation and wiring must be performed by qualified personnel in accordance with all local and national electrical codes.
- Ensure the actuator is correctly sized for the valve and application to prevent damage.
- Do not operate the actuator beyond its specified voltage and environmental limits.
CAUTION:
- Avoid exposing the actuator to excessive moisture or corrosive environments beyond its NEMA 4 rating.
- Do not apply excessive force to the manual override handle (if present) as this may damage internal components.
Product Overview
This image displays a collection of Belimo valve actuators, illustrating different configurations and designs. The GRX24-MFT-T model is represented among these, showcasing its general form factor and components.
The GRX24-MFT-T actuator is designed for direct coupling to ball valves, butterfly valves, or other quarter-turn devices. Its Multi-Function Technology (MFT) allows for flexible configuration of control signals, feedback, and auxiliary functions, making it adaptable to various control systems.
Setup and Installation
Mounting the Actuator
- Ensure the valve is in its fully closed or fully open position before mounting.
- Align the actuator's shaft coupling with the valve stem.
- Secure the actuator to the valve using the appropriate mounting hardware. Refer to the specific valve's documentation for torque specifications.
- Verify that the actuator can move freely through its full range of motion without obstruction.
Electrical Wiring
The GRX24-MFT-T operates on 24V AC/DC. Refer to the wiring diagram provided with the actuator or on the product label for specific connections. Ensure all wiring complies with local electrical codes.
- Power Supply: Connect the 24V AC/DC power supply to the designated terminals.
- Control Signal: Connect the control signal (e.g., 0-10V, 2-10V, 4-20mA) to the appropriate input terminals.
- Feedback Signal: If feedback is required, connect the feedback output (e.g., 0-10V, 2-10V) to the control system.
- Grounding: Ensure proper grounding to prevent electrical hazards and interference.
For detailed wiring diagrams and MFT configuration options, consult the official Belimo GRX24-MFT-T technical documentation or the Belimo website.
Operating Instructions
Initial Power-Up
- After completing installation and wiring, apply power to the actuator.
- The actuator will typically perform a self-calibration or move to a default position. Observe its initial movement.
Automatic Operation
The GRX24-MFT-T actuator operates automatically based on the control signal received from the building management system (BMS) or controller. It will modulate the valve position to maintain the desired flow or pressure.
Manual Override (if applicable)
Some models may include a manual override feature. If present, follow these steps:
- Disconnect power to the actuator before engaging manual override.
- Engage the manual override mechanism (e.g., push button, lever, or crank).
- Manually adjust the valve position as needed.
- Disengage the manual override and restore power for automatic operation.
Maintenance
The Belimo GRX24-MFT-T actuator is designed for maintenance-free operation under normal conditions. However, periodic checks are recommended to ensure optimal performance and longevity.
- Visual Inspection: Periodically inspect the actuator for any signs of physical damage, corrosion, or loose connections.
- Wiring Integrity: Check electrical connections for tightness and ensure insulation is intact.
- Mounting Security: Verify that the actuator remains securely mounted to the valve.
- Environmental Conditions: Ensure the operating environment remains within the specified limits (e.g., temperature, humidity).
Do not attempt to open the actuator housing, as this may void the warranty and expose internal components to damage.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Actuator does not move | No power supply; Incorrect wiring; Faulty control signal; Internal fault. | Check power connections and voltage; Verify wiring against diagram; Test control signal; Contact technical support if internal fault is suspected. |
| Actuator moves erratically | Unstable control signal; Mechanical binding in valve/actuator; Electrical interference. | Check control signal stability; Inspect valve and actuator for obstructions; Ensure proper grounding and shielding of control wires. |
| Actuator does not reach full open/closed position | Incorrect end stop settings (MFT configuration); Mechanical obstruction; Valve issue. | Review MFT configuration for end stop adjustments; Check for physical obstructions; Inspect valve for proper operation. |
If troubleshooting steps do not resolve the issue, contact Belimo technical support or a qualified service technician.
Specifications
- Model: GRX24-MFT-T
- Brand: Belimo
- Type: Valve Actuator, Non-Spring Return
- Voltage: 24V (AC/DC)
- Technology: Multi-Function Technology (MFT)
- Enclosure Rating: NEMA 4
- Package Dimensions: 14 x 7 x 7 inches
- Weight: 15.4 Pounds
- ASIN: B00XWA5U82
For complete and up-to-date specifications, refer to the official Belimo product datasheet.
Warranty and Support
Belimo products are manufactured to high-quality standards. For specific warranty terms and conditions, please refer to the official warranty statement provided with your product or visit the Belimo website.
For technical assistance, troubleshooting, or spare parts, please contact Belimo customer support or your authorized Belimo distributor. When contacting support, please have your product model number (GRX24-MFT-T) and serial number (if applicable) readily available.
Belimo Official Website: www.belimo.com
