1. Introduction
The POTTER VSR-4 is a vane type water flow alarm switch designed for use on 4-inch pipes. This device is engineered to detect sustained water flow in sprinkler systems, triggering an alarm signal to indicate activation of the fire suppression system. It is an essential component for fire safety installations, providing reliable flow detection.
Image 1.1: The POTTER VSR-4 Vane Type Water Flow Alarm Switch. This image shows the red control housing mounted on a grey pipe clamp assembly, with the vane visible within the clamp.
2. Setup and Installation
Proper installation of the VSR-4 switch is crucial for its correct operation and compliance with safety standards. Installation should only be performed by qualified personnel in accordance with all applicable national and local codes and standards, including NFPA 13, 72, and 25.
2.1 Pre-Installation Checks
- Verify that the pipe size is 4 inches, matching the VSR-4 specification.
- Ensure the installation location is accessible for future maintenance and testing.
- Confirm that the water system can be drained or isolated before installation.
- Inspect the switch for any visible damage prior to installation.
2.2 Installation Steps
- System Isolation: Shut off the water supply and drain the pipe section where the switch will be installed.
- Pipe Preparation: Clean the exterior of the pipe at the installation point. The VSR-4 is designed for horizontal or vertical pipe runs.
- Mounting: Position the switch on the pipe, ensuring the vane is correctly oriented with the direction of water flow. The arrow on the switch housing indicates the required flow direction.
- Securing: Tighten the U-bolt nuts evenly to secure the switch firmly to the pipe. Do not overtighten.
- Wiring: Connect the electrical wiring to the switch terminals according to the wiring diagram provided inside the switch enclosure. Ensure all connections are secure and comply with electrical codes. The VSR-4 is a corded electric device.
- System Restoration: Slowly restore water pressure to the system, checking for leaks around the switch.
- Testing: Perform initial operational tests as described in the "Operation" section to confirm proper functionality.
3. Operation
The POTTER VSR-4 operates by detecting a sustained flow of water through the pipe. When water flows at or above a specified rate, the vane inside the pipe is displaced, activating a set of contacts within the switch enclosure. This activation sends a signal to a connected fire alarm control panel or other monitoring device.
3.1 Alarm Activation
- The switch is designed to activate after a specific delay period (typically adjustable) to prevent false alarms from transient water surges.
- Once activated, the switch maintains its alarm state as long as sufficient water flow is detected.
3.2 Testing the Switch
Regular testing is essential to ensure the VSR-4 is functioning correctly. Refer to NFPA 25 for specific testing frequencies and procedures.
- Notify Authorities: Inform the fire department or monitoring station that a test is being conducted to avoid false alarms.
- Initiate Flow: Open the inspector's test connection or a drain valve downstream of the flow switch to create a sustained water flow.
- Observe Alarm: Verify that the flow switch activates and sends an alarm signal to the control panel within the specified delay time.
- Restore System: Close the test connection or drain valve. The alarm should reset once water flow ceases.
- Notify Authorities: Inform the fire department or monitoring station that the test is complete.
4. Maintenance
Routine maintenance helps ensure the long-term reliability of the POTTER VSR-4. All maintenance should be performed by qualified personnel.
- Visual Inspection: Periodically inspect the switch for any signs of physical damage, corrosion, or loose connections.
- Functional Testing: Conduct regular flow tests as outlined in the "Operation" section to confirm the switch activates and resets properly.
- Enclosure Integrity: Ensure the switch enclosure is securely closed and sealed to protect internal components from environmental factors.
- Wiring Check: Verify that all electrical connections are tight and free from corrosion.
Do not attempt to disassemble the switch or repair internal components. If the switch is found to be faulty, it should be replaced by a new unit.
5. Troubleshooting
This section provides guidance for common issues encountered with the VSR-4 water flow alarm switch. For complex problems, contact a qualified fire protection technician.
| Problem | Possible Cause | Solution |
|---|---|---|
| Switch does not alarm during flow test. |
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| False alarms or intermittent alarms. |
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| No power to the switch. |
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6. Specifications
| Attribute | Detail |
|---|---|
| Brand | POTTER |
| Model Number | VSR 4 |
| Description | Vane Type Water Flow Alarm Switch for 4" Pipe |
| Sensor Type | Photoelectric |
| Alarm Type | Water Flow Alarm |
| Power Source | Corded Electric |
| Pipe Compatibility | 4-inch (Nominal) |
| UPC | 767571885695 |
| Manufacturer | POTTER |
7. Warranty Information
Specific warranty terms for the POTTER VSR-4 are provided by the manufacturer. Please refer to the documentation included with your purchase or visit the official POTTER website for detailed warranty coverage, terms, and conditions. Retain your proof of purchase for warranty claims.
8. Customer Support
For technical assistance, troubleshooting beyond this manual, or inquiries regarding your POTTER VSR-4, please contact the manufacturer's customer support or your authorized distributor. Ensure you have your product model number (VSR 4) and any relevant purchase details ready when contacting support.
You may find contact information on the official POTTER website or through the seller from whom you purchased the product.
