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(E) POTTER PS40 SERIES <br /> The Symbol of Protection PRESSURE SWITCH <br /> Low Pressure Signal Connection 7g.6 <br /> re Signal Connection One Conduit Wiring <br /> Fig.5 Fig.7 <br /> To rtRE ALARM PANEL a PANEL Break out thin section of divider to provide path for wires <br /> when wiring both switches from one conduit entrance. <br /> EOLR EOLR <br /> O O <br /> O O <br /> ' O O <br /> ® O O 9 IC® O O O 0 <br /> DWG#925-2 \ <br /> DWGN 926-1 Ire, <br /> DWG#928-4 <br /> Changing Pressure Removing Knockouts <br /> (With normal system pressure) Fig.9 <br /> Fig.8 <br /> Terminal LOW PRESSURE SWITCH <br /> C:Common NC <br /> 1: Closed when installed <br /> under normal system c <br /> pressure. o <br /> 2: Open when installed bll �blblblq <br /> under normal system <br /> pressure.Closes on c , 2 <br /> pressure drop.Use for <br /> AS <br /> low air signal. <br /> Terminal HIGH PRESSURE SWITCH <br /> 1: Open when installed NC <br /> under normal system C <br /> pressure.Closes on <br /> increase in pressure. No <br /> Use for high air signal. b <br /> 2: Closed under normal b <br /> system pressure. <br /> e 2 DWG#928-5 <br /> DWG#930-3 <br /> Engineer/Architect Specifications Pressure Type Waterflow Switch <br /> Pressure type supervisory switches;shall be a Model PS40 as manufactured by A WA R N I N G <br /> Potter Electric Signal Company,St.Louis,MO.,and shall be installed on the fire <br /> sprinkler system as shown and or specified herein. installation must be performed in qualified personnel and in accordance with all <br /> national and local codes and ordinances. <br /> Switches shall be provided with a 1/2"NPT male pressure connection to be -Shock hazard.Disconnect power source before servicing.Serious injury or death <br /> connected into the air supply line on the system side of any shut-off valve. A could result. <br /> Model BVL bleeder valve as supplied by Potter Electric Signal Company of St. -Read all instructions carefully and understand them before starting installation. <br /> Louis,MO.,or equivalent shall be connected in line with the PS40 to provide a Save instructions for future use. Failure to read and understand instructions could <br /> means of testing the operation of the supervisory switch.(See Fig.3) result in improper operation of device resulting in serious injury or death. <br /> The switch unit shall contain SPDT(Fom1 C) switeh(es). One switch shall be -Risk of explosion.Not for use is hazardous locations.Serious injury or death could result. <br /> set to operate at a pressure decrease of 10 PSI(0,7 BAR)from normal. If two <br /> switches are provided,the second switch shall be set to operate at a pressure <br /> increase of 10 PSI(0,7 BAR)from normal. A CAUTION <br /> Switch contacts shall be rated at 10.1 Amps at 125/250VAC and 2.0 Amps at <br /> 30VDC. The units shall have a maximum pressure rating of 300 PSI(20,68 BAR) -Do not tighten by grasping the switch enclosure. Use wrenching flats on the bushing <br /> and shall be adjustable from 10 to 60 PSI(0,7 to 4,1 BAR). only. Failure to install properly could damage the switch and cause improper operation <br /> resulting in damage to equipment and property. <br /> Pressure switches shall have two conduit entrances,one for each individual switch -To seal threads,apply Teflon tape to male threads only. Using joint compounds or <br /> compartment to facilitate the use of dissimilar voltages for each individual switch. cement can obstruct the pressure port inlet and result in improper device operation and <br /> The cover of the pressure switch shall be zinc die-cast with rain lip and shall attach damage to equipment. <br /> with one tamper resistant screw. The pressure switch shall be suitable for indoor or -Do not over tighten the device,standard piping practices apply. <br /> outdoor service with a NEMA-4/1P55 rating. <br /> The pressure switch shall be UL,ULC,and CSFM listed,FM and LPC approved <br /> and NYMEA accepted. <br /> PRINTED IN USA MFG.#5400930-REV D PAGE 3 OF 3 <br /> 1/08 <br />