Potter PS15 Low High Supervisory Pressure Switch for Low Differential Dry and Preaction Valves - Nominal System Pressure 25 psi

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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 document contains important information on the installation operation of PS15 pressure switches Please read all instructions before beginning installation A copy of this document is by NFPA 72 to be maintained on site Potter PS15 Series Supervisory Pressure Actuated Switches designed primarily to detect an increase and or decrease from system pressure in automatic fire sprinkler systems Typical are air nitrogen supervision in Dry pipe and pre systems pressure tanks air supplies and water supplies The has two switches The Low switch is factory set to activate at 10 psi 0,35 bar on a decrease in pressure The High is factory set to activate at approximately 20 psi 1,4 bar on an in pressure See section heading Adjustments and Testing if than factory set point is required Connect the PS15 to the system side of any shutoff or check valve Apply Teflon tape to the threaded male connection on the device not use pipe dope Device should be mounted in the upright position connection down Tighten the device using a wrench on the flats on the device Instructions Remove the tamper resistant screw with the special key Carefully place a screwdriver on the edge of the knockout and apply a force sufficient to dislodge the knockout plug Fig 9 Run wires through an approved conduit connector and affix connector to the device A NEMA 4 rated conduit fitting is for outdoor use Connect the wires to the appropriate terminal connections for the intended See Figures 2,4,5 and 6 See Fig 7 for two one conduit wiring Specifications Entrances Ratings Tamper Adjustment knockouts provided for 1 2 conduit Individual switch and ground screw suitable for dissimilar voltages Form C Amps at 125 250VAC 2.0 Amps at 30VDC incorporates tamper resistant fastener that requires a special for removal One key is supplied with each device 1 lb at 5 psi 07 at 0,34 bar lbs at 30 psi 21 at 2,1 bar Weather UV Flame Resistant High Impact Composite Die Cast parts have corrosion resistant finishes 4 IP66 Rated Enclosure indoor or outdoor when used with 4 conduit fittings range 40 to 140 40 to 60 switch operates at approximately 10 psi 0,7 bar on pressure HIGH switch operates at approximately 20 1,4 bar on increasing pressure psi 20,68 bar System Connection Nylon 1 2 NPT male Range Use psi 0,35 2,07 bar 13 13D 13R 72 subject to change without notice PAGE 1 OF 4 Pressure Switch5401524 REV D 2 20Potter Electric Signal Company LLC St Louis MO Phone 800 325 3936 www pottersignal comfirealarmresources com and Testing operation of the pressure supervisory switch should be tested upon completion of installation and periodically thereafter in accordance with the NFPA codes and standards and or the authority having jurisdiction manufacturer recommends quarterly or more frequently Testing the PS15 may activate other system connected devices 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 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 the entire system See Fig 3 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 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 other Each switch may be independently adjusted to actuate at any point across the switch adjustment range Initial adjustment can be made with a 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 1 Clamping Plate Terminal 2 NPT To prevent leakage apply Teflon tape sealant to male threads only 930 1 Sprinkler Applications 3 SUPERVISORY PRESSURE SWITCH uninsulated section of a single conductor should not be looped around the and serve as two separate connections The wire must be severed providing supervision of the connection in the event that the wire dislodged from under the terminal LINE 1524 3 PIPE Y 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 electrically supervised with a supervisory switch such as Potter Model RBVS PAGE 2 OF 4 REV D 2 20Potter Electric Signal Company LLC St Louis MO Phone 800 325 3936 www pottersignal comPS15Supervisory Pressure Switchfirealarmresources com Connections 4 FIRE NORMAL SYSTEM APPLIED HIGH 1 WILL CLOSE PRESSURE INCREASE NORMAL SYSTEM APPLIED LOW 2 WILL CLOSE PRESSURE DROP 1524 4 Pressure Signal Connection 5 FIRE ALARM PANEL Conduit Wiring 7 out thin section of divider to provide path for wires when wiring switches from one conduit entrance Pressure Signal Connection 6 FIRE ALARM PANEL 928 1 928 4 PRESSURE SWITCH Pressure 8 Pressure Switch PRESSURE SWITCH Pressure Switch PRESSURE SWITCH Common PRESSURE SWITCH 928 2 Closed when installed normal system 930 3 Open when installed normal system Closes on drop Use for air signal 930 3 Open when installed normal system Closes on in pressure Use high air signal Closed under normal pressure PAGE 3 OF 4 REV D 2 20Potter Electric Signal Company LLC St Louis MO Phone 800 325 3936 www pottersignal comPS15Supervisory Pressure Switchfirealarmresources com Knockouts 10 Specifications Type Waterflow Switch type supervisory switches shall be a Model PS15 as manufactured Potter Electric Signal Company St Louis MO and shall be installed the fire sprinkler system as shown and or specified herein shall be provided with a 1 2 NPT male pressure connection to connected into the air supply line on the system side of any shut off A Model BVL bleeder valve as supplied by Potter Electric Signal of St Louis MO or equivalent shall be connected in line with PS15 to provide a means of testing the operation of the supervisory See Fig 3 switch unit shall contain SPDT Form C switch es The low switch be factory set to activate at 10 psi 0,7 bar on pressure decrease The switch shall be factory set to activate at 20 psi 1,4 bar on a pressure contacts shall be rated at 10.1 Amps at 125 250VAC and 2.0 Amps 30VDC The units shall have a maximum pressure rating of 300 psi bar and shall be adjustable from 5 to 30 psi 0,35 to 2,07 bar switches shall have two conduit entrances one for each individual compartment to facilitate the use of dissimilar voltages for each switch cover of the pressure switch shall be Weather UV Flame Resistant Impact Composite with rain lip and shall attach with one tamper screw The pressure switch shall be suitable for indoor or outdoor with a NEMA 4 IP66 rating pressure switch shall be UL cUL and CSFM listed FM app

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