3003 W CASINO RD BLDG 40-36 2025-03-25

(POTTER The Symbol of Protection OSYSU Series Outside Screw and Yoke Value Supervisory Switch Large Valve Installation - 311 Through 1211 Sizes R %�11�1\� uu Slotted mounting holes and micro - adjustment feature may be used for fine adjustment of switch assembly to mounting bracket. Re -tighten screws to 20 in-lbs minimum. Large Valve Installation as it rolls over by the threads of the valve stem. NOTE., If the valve stem is pre -grooved at 1/8" minimum 6. Mount the OSYSU on the valve yoke with the spring loaded depth; proceed to step 6. trip rod of the OSYSU pulled against the valve stem and centered in the groove of the stem. If possible, position the 1. With the valve in the FULL OPEN position, locate the OSYSU with the flat side of the bracket toward the hand OSYSU across the valve yoke as far from the valve gland wheel, as shown in Fig. 7, to help avoid creating a pinch as possible so that the spring loaded trip rod of the OSYSU point between the wheel and OSYSU. When in this preferred is pulled against the non threaded portion of the valve stem. mounting position, it is usually best to use the white indicator Position the OSYSU with the bracket near the handwheel as visible through the window, as illustrated in Fig. 3, to aid in shown in Fig. 7 if possible to avoid creating a pinch point initially locating the OSYSU in the correct position on the between the wheel and the OSYSU. yoke. If the unit must be installed inverted with the white 2. Mount the OSYSU loosely with the carriage bolts and clamp indicator no longer easily visible, use the visual indicators bar supplied. of the actuator buttons on the micro -switches, as illustrated 3. Loosen the locking screw that holds the trip rod in place and in Fig. 1, or the trip rod alignment mark on the bracket, as adjust the rod length (see Fig. 5). When adjusted properly, illustrated in Fig. 2 , to aid in initially locating the OSYSU. the rod should extend past the valve screw, but not so far 7. Final adjustment can be made by slightly loosening the two that it contacts the clamp bar. Tighten the locking screw to screws on the bracket and using the fine adjustment feature 5 in-lbs minimum to hold the trip rod in place and properly (see Fig. 5). The adjustment is correct when the plungers seal the enclosure. on the switches are depressed by the actuator and there is NOTE., If trip rod length is excessive, loosen the locking no continuity between the COM and NO terminals on the screw and remove the trip rod from the trip lever. Using switches. pliers, break off the one (1) inch long notched section (see & Tighten the adjustment screws and mounting hmdware Fig. 10). Reinstall hip rod and repeat Step 3 procedure. securely (minimum 20 in-lbs). Check to insure that the rod 4. Mark the valve stem at the center of the trip rod. moves out of the groove easily and that the switches activate within two toms when the valve is operated from the FULL 5. Remove the OSYSU. Utilizing a 3/8" or U" diameter straight OPEN towards the CLOSED position. file, file a 1 /8" minimum depth groove centered on the mark 9. Reinstall the cover and tighten the cover screws to 15 in-lbs on the valve stem. Deburr and smooth the edges of the minimum to properly seal the enclosure. groove to prevent damage to the valve packing and to allow the trip rod to move easily in and out of the groove as the A CAUTION valve is operated. NOTE., A groove depth of up to approximately 3/16" can Close the valve fully to determine that the stem threads do not make it easier to install the OSYSU so that it does not restore activate the switch. The switch being activated by the stem threads 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.pottersignatcom 5401525-R VG • 6/19 PAGE OF