OSYSU Series Outside Screw and Yoke Valve Supervisory Switch Features NeMa 4X* (Ip 65) and 6p (Ip 67) *Enclosure is 4X. For additional corrosion protection of mounting hardware, use model OSYSU-2 CRH -40 to 140 (-40C to 60C) operating temperature range Visual switch indicators Two conduit entrances adjustable length trip rod accomodates up to 12a Wg wire Three position switch detects tampering and valve closure Knurled mounting bracket prevents slipping Fine adjustment feature for fast, easy installation RoHS compliant One or two SpDT contact models (-1,-2) Before any work is done on the fire sprinkler or fire alarm system, the building owner or their authorized representative shall be notified. Before opening any closed valve, ensure that opening the valve will not cause any damage from water flow due to open or missing sprinklers, piping, etc. Important: This document contains important information on the installation and operation of OS&Y valve supervisory switches. please read all instructions carefully before beginning installation. a copy of this document is required by NFpa 72 to be maintained on site. Technical Specifications Description Dimensions See Fig 8 The OSYSU is used to monitor the open position of an OS&Y (outside screw and yoke) type gate valve. This device is available in Weight 1.6 lbs (0,73 kg) two models the OSYSU-1, containing one set of SpDT (Form C) Cover: Die Cast Finish: Red powder Coat contacts and the OSYSU-2, containing two sets of SpDT (Form C) enclosure Base: Die Cast Finish: Black powder Coat contacts. These switches mount conveniently to most OS&Y valves All parts have corrosion resistant finishes ranging in size from 2 to 12 (50mm to 300mm). They will mount on some valves as small as (12,5mm). Tamper Resistant Screws Cover Tamper The cover is held in place by two tamper resistant screws that require Optional Cover Tamper Switch a vailable a special tool to remove. The tool is furnished with each device. OSYSU-1: One Set of SpDT (Form C) Testing OSYSU-2: Two Sets of SpDT (Form C) Contact The operation of the OSYSU and its associated protective monitoring 10.0 amps at 125/250 V aC Ratings system shall be inspected, tested, and maintained in accordance 2.0 amps at 30VDC Resistive with all applicable local and national codes and standards and/or the 10 mamps minimum at 24 VDC authority Having Jurisdiction (manufacturer recommends quarterly -40 F to 140F (-40C to 60C) or more frequently). a minimum test shall consist of turning the valve wheel towards the closed position. The OSYSU shall operate within NeMa 4X (Ip 65) and NeMa 6p (Ip 67) enclosure environmental the first two revolutions of the wheel. Fully close the valve and ensure (Use suitably rated conduit and connector) Limitations that the OSYSU does not restore. Fully open the valve and ensure that Indoor or Outdoor Use (See OSYSU-eX Bulletin the OSYSU restores to normal only when the valve is fully opened. 5400705 for Hazardous locations) Two Knockouts for 1/2 conduit provided Conduit CAUTION entrances (See Notice on page 6 and Fig. 9 on page 5) Close the valve fully to determine that the stem threads do not Service Use NFpa 13, 13D, 13R, 72 activate the switch. The switch being activated by the stem threads Specifications subject to change without notice could result in a false valve open indication. Potter Electric Signal Company, LLC St. Louis, MO Tech Support: 866-956-0988 / Customer Service: 866-572-3005 www.pottersignal.com 5401525 - REV G 6/19 page 1 OF 6OSYSU Series Outside Screw and Yoke Valve Supervisory Switch Theory of Operation The OSYSU is a 3 position switch. The center position is the normal installation position. Normal is when the switch is installed on the OS&Y valve, the valve is fully open and the trip rod of the OSYSU is in the groove of the valve stem. Closing the valve causes the trip rod to ride up out of the groove and activates the switches. Removing the OSYSU from the valve causes the spring to pull the trip rod in the other direction and activates the switches. Visual Switch Status Indication There are 3 visual indicators to determine the status of the switches. Fig 1 the actuator button of the micro switches are on the raised section of the switch actuator. Fig 2 the trip rod is perpendicular to the base and lined up with the alignment mark on the mounting bracket. Fig 3 the white visual indicator is visible through the window on the back of the switch actuator. A final test is to meter the contacts marked COM and N.O. to ensure they are an open circuit when the valve is open and that they close and have continuity within 2 revolutions of turning the valve handwheel towards the closed position and the contacts remain closed as the valve is completely closed and until the valve is completely opened when the trip rod drops back into the groove in the valve stem. Fig 1 Fig 2 Fig 3 Fig 4 Fig 5 Trip Rod Locking Screw Micro-adjustment Feature Potter Electric Signal Company, LLC St. Louis, MO Tech Support: 866-956-0988 / Customer Service: 866-572-3005 www.pottersignal.com 5401525 - REV G 6/19 page 2 OF 6