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CONTAINMEWT <br /> PETROMLTER SERIEL� 20 DOUBLE <br /> DESCRIPTION COPPER <br /> KEY LOCK <br /> WTUBING <br /> ® <br /> NEON LIOHTS The Tank Leak Alarm System consists of the following: <br /> O PUSHBUTTON SILENCER 1 . THE MODEL 20 TYPE T ALARM UNIT: Consists of a pressure switch, 3 <br /> PUSHBUTTON TEST status lights (Green — Normal/Power On, Red — Alarm, Amber — Alarm <br /> Tx Silenced), buzzer, relay, pushbutton silencer switch, pushbutton alarm <br /> Bx 2x44 STEEL test switch and printed circuit to perform the alarm functions. <br /> h ..-- ':.. ., ENCLOSURE AIR BELL <br /> ;.. <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 It IPS MODEL 21 <br /> double tapped tank top bushing with brass locking fitting. A 1-1/21r IPS TANK ASSEMBLY UNIT <br /> schedule 40 reinforcer pipe, supplied by the installer, is required to hold 3/16"O.D. <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 /> PRINTEDCRIIRCUIT � � I . For .double containment tanks not 100% vented to <br /> BOAatmosphere a Model 22 Equalizing Unit is also required. <br /> PSWITCI E 3. THE MODEL 22 EQUALIZINGIsm: Required only for double containment <br /> tanks that are not 100% vented to atmopshere. Consists of a one piece coil <br /> of 3/16n O.D. copper tubing, a 2n IFAS nipple/pipe coupling adaptor and 2"IPS ADAPTOR <br /> MODEL 20 3/16" tube fittings. <br /> MODEL 22 <br /> TANK LEAK ALARM UNIT EQUALIZING UNIT <br />; <br /> LINE: 115 VAC, BO CY. 10096 VENT LINE: 115 VAC, 60 GY. PRESSUREIVACUUM VENT <br /> MODEL 21 <br /> TANK ASSEMBLY UNIT <br /> DOUBLE <br /> MODEL 20 CONTAINMENT MODEL 20 /DOUBLE <br /> ALARM UNIT CONTAINMENT <br /> TANK ALARM UNIT - TANK <br /> •a:- II. � Quo_ 11 T <br /> ®. MODEL 21 II a v <br /> L MODEL 22 SII <br /> TANK ASSEMBLY <br /> UNIT II EQUALIZING UNIT li <br /> VENTED PLUG _ l <br /> REINFORCER PIPE 1 REINFORCER PIPE <br /> AIR BELL <br /> STORAGE TANK <br /> AIR BELL STORAGE TANK <br /> ❑ FIG 1: FOR DOUBLE CONTAINMENT TANKS ❑ FIG. 2: FOR DOUBLE CONTAINMENT TANKS <br /> 100 % VENTED TO ATMOSPHERE NOT 100 % VENTED TO ATMOSPHERE <br />