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L <br /> Installation Field Assembling Vac Sensor/Vac Float modules <br /> STP <br /> 9, <br /> (228.6mm) <br /> Vac Sensor `-- <br /> housing 6.25" <br /> (158.8mm) <br /> Tension clamp <br /> 9.625" E41 <br /> (244.5mm) 12 <br /> (304.8mm) Support bracket <br /> Riser <br /> Sump <br /> vacsentlimen.eps <br /> Front View Side View <br /> Figure 2. Vac Sensor Assembly Dimensions <br /> Field Assembling Vac Sensor/Vac Float modules <br /> If you are field assembling the Vac SensorNac Floats into the Vac Sensor housing continue to Step 1. If you are <br /> installing the pre-assembled 2, 3, or 4 Vac Sensor kit go to "Installing Vac Sensor Housing Support Bracket" on <br /> page 9. <br /> 1. Get the Vac Sensor modules and brackets from each of the secondary piping vacuum monitoring kits. If a tank <br /> interstice is being monitored, also get the Vac Sensor module and bracket from that kit. <br /> 2. Get the Vac Sensor housing from the mounting kit and attach each of the Vac Sensors (up to 4) to the top of <br /> the housing using #10 x 3/8" self-tapping screws as shown in Figure 3. Mount the Vac Sensors with the 'STP <br /> Siphon' labeled port facing the front of the housing. <br /> 3. For Vac Sensors requiring Vac Floats, continue to Step 4. For the Vac Sensor monitoring the tank interstice <br /> skip to step. <br /> 4. Get the Vac Floats, support brackets, plastic valves and #10 x 1/2" self-tapping screws from the secondary <br /> piping vacuum monitoring kits. <br /> If you are not monitoring a tank interstice, there is a maximum of two left-hand Vac Sensor/Float mounting po- <br /> sitions and two right-hand Vac Sensor/Float mounting positions in the Vac Sensor Housing (Figure 3). If a tank <br /> interstice is being monitored, then one of the four Vac Sensors will have no Vac Float attached. <br /> 5. Get the plastic valves, barbed elbows, tapered bushings and cord grip nuts from the Vac Float kits. Insert <br /> bushings and screw cord grip nuts into the two ports of the Vac Float. Insert a valve into one port and a <br /> barbed elbow into the other port of each Vac Float. Orient elbow and valves in Vac Floats as shown in Figure 4 <br /> then tighten nuts to secure the fittings. <br /> 6 <br />