Potter PS40 Series Low High Supervisory Pressure Switch for Dry Valves - Nominal System Pressure 40 psi

Features One or two switch models available Independent switch adjustment on two switch models no tools 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 PS40 pressure switches Please read all instructions before beginning installation A copy of this document is by NFPA 72 to be maintained on site Potter PS40 Series Supervisory Pressure Actuated Switches are primarily to detect an increase and or decrease from normal pressure in automatic fire sprinkler systems Typical applications air nitrogen supervision in dry pipe and pre action systems pressure air supplies and water supplies The PS40 1 has one switch and factory set to activate at approximately 30 psi 2,1 bar on a decrease pressure The PS40 2 has two switches The Low switch is factory set activate at approximately 30 psi 2,1 bar on a decrease in pressure High switch is factory set to activate at approximately 50 psi 3,5 on an increase in pressure NFPA 72 requires a supervisory signal the pressure increases or decreases by 10 psi from normal The PS40 factory set for a normal air pressure of 40 psi See section heading and Testing if other than factory set point is required Connect the PS40 to the system side of any shutoff or check valve Apply Teflon tape to the threaded male connection on the device Device should be mounted in the upright position Threaded Adjustment not use pipe dope down Tighten the device using a wrench on the flats on the device Specifications Entrances Ratings Tamper knockouts for 1 2 conduit provided Individual switch and ground screw suitable for dissimilar voltages Form C Amps at 125 250 VAC 2.0 Amps at 30 VDC SPDT in PS40 1 Two SPDT in PS40 2 incorporates tamper resistant fastener that requires a special for removal One key is supplied with each device 1 lb at 10 psi 07 at 7 bar lbs at 60 psi 28 at 4,1 bar Weather UV Flame Resistant High Impact Composite Die Cast parts have corrosion resistant finishes F to 140 40 to 60 4 IP66 Rated Enclosure indoor or outdoor when used with 4 conduit fittings operates on decrease at 30 psi 2,1 bar operates on increase at 50 psi 3,5 bar and on decrease at psi 2,1 bar psi 20,68 bar System Connection Nylon 1 2 NPT male psi 7 4,1 bar Range Use 13 13D 13R 72 subject to change without notice PAGE 1 OF 4 SeriesSupervisory Pressure Switch5400930 REV H 2 20Potter Electric Signal Company LLC St Louis MO Phone 866 956 0988 Canada 888 882 1833 www pottersignal comDRAFT 1firealarmresources com Clamping Plate Terminal 2 uninsulated section of a single conductor should not be looped the terminal and serve as two separate connections The must be severed thereby providing supervision of the in the event that the wire becomes dislodged from the terminal Sprinkler Applications 3 SUPERVISORY PRESSURE SWITCH LINE PIPE Y 924 1A of any shutoff valves between the alarm check valve the PS10 will render the PS10 inoperative To comply with IFC and NFPA 13 any such valve shall be electrically su with a supervisory switch such as Potter Model RBVS Instructions Remove the tamper resistant screw with the special key provided it is necessary to remove the sealed knockouts carefully place a on the edge of the knockout and sharply apply a force to dislodge the knockout plug See 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 service intended See Figures 2,4,5 and 6 See Fig 7 for two one conduit wiring and Testing Testing the PS40 may activate other system connected devices operation of the pressure supervisory switch should be tested upon of installation and periodically thereafter in accordance with applicable local national and NFPA codes and standards and or the having jurisdiction manufacturer recommends quarterly or frequently use of a Potter BVL see product bulletin 5400799 for details recommended to facilitate setting and testing of the PS40 pressure When a BVL bleeder valve is used the pressure to the switch be isolated and bled from the exhaust port on the BVL without the supervisory pressure of the entire system See Fig 3 operation point of the PS40 Pressure Switch can be adjusted to any between 10 and 60 psi 0,7 4,11 bar by turning the adjustment clockwise to raise the actuation point and counter clockwise lower the actuation point In the case of the PS40 2 both switches independent of each other Each switch may be independently to actuate at any point across the switch adjustment range If the needs to be adjusted from the factory settings adjust the system to the desired trip point Use an ohmmeter on the appropriate COM and 2 for pressure decrease and COM and 1 for pressure Adjust the knurled knob until the meter changes state At that the switch is set for that particular pressure Final adjustments be verified with a pressure gauge position of the top of the adjustment knob across to the printed on the switch bracket can be used to provide an approximate visual of the pressure switch setting 1 NPT To prevent leakage apply Teflon tape sealant to male threads only 930 1 PAGE 2 OF 4 REV H 2 20Potter Electric Signal Company LLC St Louis MO Phone 866 956 0988 Canada 888 882 1833 www pottersignal comPS40 SeriesSupervisory Pressure SwitchDRAFT 1firealarmresources com Electrical Connections 4 Conduit Wiring 7 FIRE NORMAL SYSTEM PRESSURE APPLIED HIGH TERMINAL 1 WILL CLOSE PRESSURE INCREASE NORMAL SYSTEM PRESSURE APPLIED LOW TERMINAL 2 CLOSES ON DROP Pressure Signal Connection 5 FIRE ALARM PANEL PRESSURE SWITCH 928 4 Pressure 8 Pressure Switch PRESSURE SWITCH Pressure Switch PRESSURE SWITCH 928 1 Pressure Signal Connection 6 FIRE ALARM PANEL Common PRESSURE SWITCH Closed when installed under system Pressure Open when installed under system pressure on pressure drop for low air signal 930 3 930 3 Open when installed under system pressure on Use for high air Closed under normal system Knockouts 9 928 2 PAGE 3 OF 4 REV H 2 20Potter Electric Signal Company LLC St Louis MO Phone 866 956 0988 Canada 888 882 1833 www pottersignal comPS40 SeriesSupervisory Pressure SwitchDRAFT 1firealarmresources com Specifications Type Waterflow Switch type supervisory switches shall be a Model PS40 as by Potter Electric Signal Company St Louis MO and be installed on the fire sprinkler system as shown and or specified shall be provided with a 1 2 NPT male pressure connection be connected into the air supply line on the system side of any shut valve A Model BVL bleeder valve as supplied by Potter Electric Company of St Louis MO or equivalent shall be connected line with the PS40 to provide a means of testing the operation of the switch See Fig 3 switch unit shall contain SPDT Form C switch es One switch be set to operate at 30 psi 2,1 bar on a pressure decrease If two are provided the second switch shall be set to operate at