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PE7ROME7ER SERIES 20 DOUBLE iCONTAINMENT TANS{ LEAH ALAR,' <br /> DESCRIPTION <br /> COPPER <br /> �TDBING <br /> NEON LIGHTS The Tank Leak Alarm System consists of the following: <br /> E-7 <br /> PUSNBUrrCry SILENCER ! 1THE MODEL 20 TYPETALARM UNIT: Consists ofapressure switch,3 <br /> PUSHBUTTON TEST status lights (Green —Normal/Power On, Red —Alarm, Amber—Alarm <br /> Silenced), buzzer, relay, pushbutton silencer switch, pushbutton alarm <br /> b,4.°STEEL test switch and printed circuit to perform the alarm functions. AIR BELL <br /> ! • <br /> ENCLOSURE <br /> 2. THE MODEL 21 TANK ASSEMBLY UNIT: Consists of a one piece coil <br /> of 1/4" O.D. copper tubing with a brass air bell and a 2" x 1-1/2" IPS MODEL 21 <br /> double tapped tank top bushing with brass locking fitting. A 1-1/2" IPS TANK ABEEYBLY UNIT <br /> ARM schedule 40 reinforcer pipe, supplied by the installer, is required to hold <br /> TERMINAL STRIP the air bell rigidly in place at the bottom of the double containment tank /COPPER TUBING <br /> unless some other means of support is provided for the air bell. <br /> PRINTED CIRCUIT IMPORTANT: For double containment tanks not 100% vented to <br /> BOARD atmosphere a Model 22 Equalizing Unit is also required. <br /> PRESSURE 3• THE MODEL 22 EQUALIZING UNIT:Required only for double containment / <br /> SWITCH tanks that are not 100%vented toatmopshere.Consists of a one piece coilAQ 1W 2-In ADAPTOR - <br /> of 3/16" O.D. copper tubing, a 2" IPS nipple/pipe coupling adaptor and <br /> MODEL 20 3/16" tube fittings. /// MODEL 22 <br /> TANK LEAK ALARM UUT EQUALING UNIT <br /> L <br /> - - OPERATION <br /> eRE33W,E1V.C'JUx vEX, - ':S.:" �IAK: „3 vAC.f0[•. <br /> LIKE I"+.c .v c+ The Tank Leak Alarm System is fully automatic and need only be <br /> connected to a power source.The system operates on the principles of <br /> PRU... hydrostatics using the Tank Assembly Unit Air Bell as the sensing device. NaPEL ra .00v,EE <br /> LAPELc00TNNNENT I Y 9 Y 9 '^..ixNENr a <br /> A leak in the storage tank will start flooding the double containment tank �`��'' <br /> ALARM m.vl . . � ! <br /> with the stored liquid,immersing the air bell in tank liquid.This causes an <br /> i increase in pressure of the trapped air within the air bell and inter- „O <br /> NUPE:ix <br /> Eou.unNV JN„ ','� connecting 1/4"coppertubing that activates a switching element.within i *YY•ueNu• .I <br /> the Model 20 tank leak alarm unit,t0 sound alarm.In factory tests using I, "xT <br /> I VExiEO ILW ! <br /> Ri�Xrc.cER«.E C! \� �` __I 50' of tubing and water a 3/6"immersion, above the air be openings. ,E,ro.cE. <br /> sounded the alarm. The audible alarm is silenced by a pushbutton NR IBL <br /> u"BFB -WORA E TAN. silencing circuit and automatically resets when the double containment I ... ....TMa <br /> tank is pumped out.An alarm test pushbutton permits verification that the <br /> ❑FIG. 2: FOR DOUBLE CONTAINMENT TANKS alarm circuit is functioning correctly.For double containment tanks that I ❑ FIG t: FOR DOUBLE CONTAINMENT TANKS i <br /> NOT too %VENTEb TO ATMOSPHERE are not 100%vented to atmosphere a 3/16"equalizing line is added to 100% VENTED TO ATMOSPHERE <br /> compensate for any pressure or vacuum within the double containment <br /> dank. i----- <br /> - Sto JC%;Qj: MCIiku:octuring 6e Soles �. <br /> 5709 East Fremont Street <br /> - Stockton, California 95205 <br /> (209) 935-0373 <br />