Potter PS120 Series (EU) Supervisory Pressure Switch for Excess Pressure Systems VDS

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PS120 VdS PRESSURE SWITCH Individual switch compartments and ground screw suitable for dissimilar voltages cUL and CSFM Listed FM and LPC Approved NYMEA CE Marked VdS 9.6cm 3.78 W x 8.1cm 3.20 D x 10.7cm 4.22 H Entrance Two knockouts provided for 1 2 conduit Cover Die cast with textured red powdercoat finish Connection Nylon NPT male Adjustment PS120 1 operates on decrease at 7,6 bAR 110 PSI Range 1,7 12,1 bAR 25 175 PSI Typical 0,14 at 1,7 bAR 2 lbs at 25 PSI PS120 2 operates in increase at 9 bAR 130 PSI and on decrease at 7,6 bAR 110 PSI single cover screw and rain lip base Die cast 55 at 12,1 bAR 8 lbs at 175 PSI System Pressure 20,68 bAR 300 PSI Contacts SPDT Form C 10.1 Amps at 125 250VAC 2.0 Amps at 30VDC One SPDT in PS120 1 Two SPDT in PS120 2 Specifications Cover incorporates tamper resistant fastener that requires a special key for removal One key is supplied with 4 IP66 Rated Enclosure indoor or outdoor when with NEMA 4 conduit fittings range 40 to 60 40 to 140 each device For optional cover tamper switch kit order Stock No 0090200 See bulletin 5401200 PSCTSK Connect the wires to the appropriate terminal connections for the service intended See Figures 2,4,5,6 and 8 See Fig 7 for two switch one conduit wiring And Testing operation of the supervisory pressure switch should be tested upon of installation and periodically thereafter in accordance with applicable NFPA codes and standards and or the authority having manufacturer recommends quarterly or more frequently Testing the PS120 may activate other system connected devices use of a Potter BVL see product bulletin 8900067 for details is to facilitate setting and testing of the PS120 pressure switch a BVL bleeder valve is used the pressure to the switch can be and bled from the exhaust port on the BVL without effecting the pressure of the entire system See Fig 3 operation point of the PS120 Pressure Switch can be adjusted to any between 1,7 12,1 bAR 25 and 175 PSI by turning the adjustment clockwise to raise the actuation point and counter clockwise to the actuation point In the case of the PS120 2 both switches operate of each other Each switch may be independently adjusted to at any point acrosss the switch adjustment range Initial adjustment be made with a visual reference from the top of the adjustment knob to the printed scale on the switch bracket Final adjustments should verified with a pressure gauge VDS VDS Use Sprinkler or two family dwelling Occupancy up to four stories Fire Alarm Code NFPA 13 NFPA 13D NFPA 13R NFPA 72 Potter PS120 Series Supervisory Pressure Actuated Switches are primarily to detect an increase and or decrease from normal system in automatic fire sprinkler systems Typical applications are Wet systems with excess pressure pressure tanks air supplies and water The PS120 switch is factory set for 8,3 bAR 120 PSI normal pressure The switch marked with the word LOW is set to operate at pressure decrease of 0,7 bAR 10 PSI at 7,6 bAR 110 PSI The switch with the word HIGH is set to operate at a pressure increase of 0,7 10 PSI at 9 bAR 130 PSI See section heading Adjustments and if other than factory set point is required Connect the PS120 to the system side of any shutoff or check valve Apply Teflon tape to the threaded male connection on the device Do not use pipe dope Device should be mounted in the upright position Threaded connection down Tighten the device using a wrench on the flats on the device Instructions Remove the tamper resistant screw with the special key provided Carefully place a screwdriver on the edge of the knockout and sharply apply a force sufficient to dislodge the knockout plug See Fig 9 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 Electric Signal Co LLC St Louis MO Cust Service 866 240 1870 Tech Support 866 956 1211 Canada 888 882 1833 www pottersignal com IN USA 5401169 REV b PAGE 1 OF 8 1 NPT To prevent leakage apply Teflon tape sealant to male threads only 930 1 VdS PRESSURE SWITCH Clamping Plate Terminal 2 I N N I N 923 3 uninsulated section of a single conductor not be looped around the terminal and as two separate connections The wire be severed thereby providing supervision the connection in the event that the wire dislodged from under the terminal of any shutoff valves between the alarm check valve and the will render the PS10 inoperative To comply with IbC IFC NFPA 13 any such valve shall be electrically supervised with a switch such as Potter Model RbVS Sprinkler Applications 3 PS120 SYSTEM CHECK Y VALVE 926 1A Connections 4 NORMAL SYSTEM APPLIED LOW 2 CLOSES ON DROP FIRE FIRE 933 1 NORMAL SYSTEM APPLIED TERMINAL WILL CLOSE ON INCREASE IN USA 5401169 REV b PAGE 2 OF 8 VdS PRESSURE SWITCH Pressure Signal Connection 5 FIRE ALARM PANEL Pressure Signal Connection 6 FIRE ALARM PANEL 928 1 928 2 Conduit Wiring 7 out thin section of divider to provide path for wires when wir both switches from one conduit entrance PRESSURE SWITCH PRESSURE SWITCH Pressure normal system pressure 8 Common Closed when installed under normal system pressure Open when installed under normal system pressure Closes on pressure drop Use for low air signal Open when installed under normal system pressure Closes on increase in pressure Use for high air signal Closed under normal system pressure 930 3 928 4 Knockouts 9 IN USA 5401169 REV b PAGE 3 OF 8 VdS PRESSURE SWITCH Installation must be performed by qualified personnel and in accordance with all national and local codes and ordinances Shock hazard Disconnect power source before servicing Serious injury or death could result Read all instructions carefully and understand thembefore starting installation Save instructions for future use Failure to read and understand instructions could result in improper operation of device resulting in serious injury or death Risk of explosion Not for use is hazardous locations Serious injury or death could result Do not tighten by grasping the switch enclosure Use wrenching flats on the bushing only Failure to install properly could damage the switch and cause improper operation resulting in damage to equipment and property To seal threads apply Teflon tape to male threads only Using joint compounds or cement can obstruct the pressure port inlet and result in improper device operation and damage to equipment Do not over tighten the device standard piping practices apply Do not apply any lubricant to any component of the pressure switch Specifications Pressure Type Waterflow Switch type supervisory switches shall be a Model PS120 as by Potter Electric Signal Company St Louis MO and shall installed on the fire sprinkler system as shown and or specified herein shall be provided with a NPT male

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