PS15 Supervisory Pressure Switch Features Two switch model Independent switch adjustment, no tools needed Two 1/2 conduit / cable entrances Separate isolated wiring chambers Non-corrosive pressure connection Non-Conductive Enclosure VdS version available This document contains important information on the installation and operation of PS15 pressure switches. Please read all instructions carefully before beginning installation. A copy of this document is required by NFPA 72 to be maintained on site. Installation Technical Specifications The Potter PS15 Series Supervisory Pressure Actuated Switches Two knockouts provided for 1/2 conduit. Individual switch Conduit Entrances are designed primarily to detect an increase and/or decrease from compartments and ground screw suitable for dissimilar voltages normal system pressure in automatic fire sprinkler systems. Typical SPDT (Form C) Contact Ratings applications are: air/nitrogen supervision in Dry pipe and pre- 10.1 Amps at 125/250VAC, 2.0 Amps at 30VDC action systems, pressure tanks, air supplies, and water supplies. The Cover incorporates tamper resistant fastener that requires a special Cover Tamper key for removal. One key is supplied with each device. PS15 has two switches. The Low switch is factory set to activate at approximately 10 psi (0,35 bar) on a decrease in pressure. The High Typical 1 lb. at 5 psi (,07 at 0,34 bar) Differential switch is factory set to activate at approximately 20 psi (1,4 bar) on an 3 lbs at 30 psi (,21 at 2,1 bar) increase in pressure. See section heading Adjustments and Testing if Dimensions 3.78(9,6cm)Wx3.20(8,1cm)Dx4.22(10,7cm)H other than factory set point is required. Cover: Weather/UV/Flame Resistant High Impact Composite 1. Connect the PS15 to the system side of any shutoff or check valve. Enclosure Base: Die Cast All parts have corrosion resistant finishes 2. Apply Teflon tape to the threaded male connection on the device. NEMA 4/IP66 Rated Enclosure - indoor or outdoor when used with Environmental (Do not use pipe dope) NEMA 4 conduit fittings. Limitations Temperature range: -40F to 140F (-40C to 60C) 3. Device should be mounted in the upright position. LOW switch operates at approximately 10 psi (0,7 bar) on (Threaded connection down) Factory Adjustment decreasing pressure. HIGH switch operates at approximately 20 4. Tighten the device using a wrench on the flats on the device. psi (1,4 bar) on increasing pressure Maximum System 300 psi (20,68 bar) Wiring Instructions Pressure 1. Remove the tamper resistant screw with the special key Pressure Connection Nylon 1/2 NPT male provided. Pressure Range 5-30 psi (0,35 - 2,07 bar) 2. Carefully place a screwdriver on the edge of the knockout and Service Use NFPA 13, 13D, 13R, 72 sharply apply a force sufficient to dislodge the knockout plug. See Fig. 9. *Specifications subject to change without notice. 3. Run wires through an approved conduit connector and affix the connector to the device. A NEMA-4 rated conduit fitting is required for outdoor use. 4. Connect the wires to the appropriate terminal connections for the service intended. See Figures 2,4,5 and 6. See Fig. 7 for two switch one conduit wiring. Potter Electric Signal Company, LLC St. Louis, MO Phone: 800-325-3936 www.pottersignal.com 5401524 - REV D 2/20 PAGE 1 OF 4Incoming Outgoing PS15 Supervisory Pressure Switch Adjustment and Testing The operation of the pressure supervisory switch should be tested upon completion of installation and periodically thereafter in accordance with the applicable NFPA codes and standards and/or the authority having jurisdiction (manufacturer recommends quarterly or more frequently). Note: Testing the PS15 may activate other system connected devices. The use of a Potter BVL (see product bulletin 5400799 for details) is recommended to facilitate setting and testing of the PS15 pressure switch. When a BVL (bleeder valve) is used, the pressure to the switch can be isolated and bled from the exhaust port on the BVL without affecting the supervisory pressure of the entire system. See Fig. 3 The operation point of the PS15 Pressure Switch can be adjusted to any point between 5 and 30 psi (0,35 - 2,07 bar) by turning the adjustment knob(s) clockwise to raise the actuation point and counter clockwise to lower the actuation point. In the case of the PS15-2, both switches operate independently of each other. Each switch may be independently adjusted to actuate at any point across the switch adjustment range. Initial adjustment can be made with a visual reference from the top of the adjustment knob across to the printed scale on the switch bracket. Final adjustments should be verified with a pressure gauge. Dimensions Switch Clamping Plate Terminal Fig 1 Fig 2 GROUND SCREWS 2.87 72.97 ADJUSTMENT 4.22 KNOB 107.19 1/2 NPT 2.48 1.60 62.87 40.64 3.20 3.78 95.89 81.28 NOTE: To prevent leakage, apply Teflon tape sealant to male threads only. DWG 930-1 An uninsulated section of a single conductor should not be looped around the terminal and serve as two separate connections. The wire must be severed, thereby providing supervision of the connection in the event that the wire becomes dislodged from under the terminal. Typical Sprinkler Applications Fig 3 PS15 SUPERVISORY PRESSURE SWITCH AIR LINE SHUT-OFF PS10 BLEEDER VALVE ALARM TEST PRESSURE CHECK VALVE SWITCH VALVE BVL WATER MOTOR GONG CHECK RBVS VALVE DRY PIPE VALVE WATER DWG. 1524-3 BY-PASS OS & Y TEST VALVE VALVE CAUTION Closing of any shutoff valves between the alarm check valve and the PS10 will render the PS10 inoperative. To comply with IBC, IFC, and NFPA-13, any such valve shall be electrically supervised with a supervisory switch such as Potter Model RBVS. Potter Electric Signal Company, LLC St. Louis, MO Phone: 800-325-3936 www.pottersignal.com 5401524 - REV D 2/20 PAGE 2 OF 4