Potter OSYSU-2 Supervisory Switch: Specs, Wiring & Compatible Valves
Overview
The Potter OSYSU-2 is a robust and reliable supervisory switch designed to monitor the open position of an OS&Y (Outside Screw and Yoke) valve. As a crucial component in fire protection systems, the Potter OSYSU-2 plays a vital role in ensuring that the water supply to fire sprinklers remains uninterrupted. This device is part of the esteemed Potter range, known for their innovation and adherence to stringent safety standards, including UL 268 and FM certifications.Technical Specifications
The Potter OSYSU-2 supervisory switch is engineered with precision to meet the demanding needs of fire safety systems. Below is a detailed specification table to guide technicians:| Feature | Specification |
|---|---|
| Activation Mechanism | Supervisory activation on valve movement |
| Electrical Ratings | 10.0A @ 125/250 VAC; 2.5A @ 30 VDC |
| Contact Type | SPDT (Single Pole, Double Throw) |
| Enclosure Rating | NEMA 4/4X Weatherproof |
| Operating Temperature | -40°F to 140°F (-40°C to 60°C) |
| Protocol Compatibility | CLIP, IDNET, SLC |
Wiring Configurations
The Potter OSYSU-2 supervisory switch supports both Class A and Class B wiring configurations. Class B wiring is the most common setup, allowing a simple series circuit. However, Class A wiring provides the advantage of a redundant path, ensuring continued operation even if a wire is severed.When installing the OSYSU-2 in a Class A wiring configuration, ensure that each loop is properly terminated to prevent false alarms and maintain system integrity.
Valve Compatibility
The Potter OSYSU-2 is specifically designed for use with OS&Y valves, providing accurate monitoring of valve positions. Its compatibility extends to a range of valve sizes, typically from 2" to 12", making it suitable for diverse applications in fire sprinkler systems. For specialized environments, you might consider the Potter OSYSU-EX-O, which offers additional features for explosion-proof applications.Ensure that the OSYSU-2 is mounted correctly to the valve stem to avoid mechanical disruption and guarantee accurate position monitoring.
FAQs
The OSYSU-2 is designed for larger valves and offers enhanced features such as a wider temperature range, compared to the OSYSU-1, which is suited for smaller applications.
Yes, the OSYSU-2's NEMA 4/4X rated enclosure is suitable for outdoor installations, providing protection against water and corrosion.
The OSYSU-2 is compatible with multiple protocols like CLIP and IDNET, providing flexibility in integration with various fire alarm control panels.
It is recommended to test the OSYSU-2 at least quarterly to ensure it remains in optimal working condition, adhering to NFPA 72 standards.
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