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Installation <br /> Overview <br /> A simplified Veeder-Root vacuum sensor installation in an STP containment sump is shown in Figure 1.Vac Sensor <br /> (VS) and Vac Float (VF) modules are assembled in a housing which is shown in Figure 2.A separate mounting <br /> bracket (see Figure 2) is easily attached to the STP riser to support the Vac Sensor housing. Approximately 12 <br /> inches (304.8mm) of clearance is required below the pump manifold for the Vac Sensor components. Final <br /> vacuum connections are made once the housing and bracket are in place. A 1/4" NPT port into the interstitial <br /> space of the double-wall vapor return line, double-wall product line, and/or double-wall containment sump must be <br /> accessible in the containment sump. For installations requiring tank interstice monitoring, a riser must be in the <br /> same containment sump for the tank interstitial sensor. Field wiring connections of the Vac Sensor components <br /> are sealed in a customer supplied containment sump junction box (JB). <br /> Seal off STP <br /> Barbed fitting in siphon <br /> port for vacuum source <br /> To console <br /> Product line <br /> Dual weatherproof junction vacuum fitting <br /> boxes w/cord grip wiring <br /> entries containing epoxy <br /> sealed connections <br /> • <br /> Double wall sump """ '"" "' _ Vapor return line <br /> vacuum fitting' vacuum fitting <br /> If multiple ports are provided • <br /> in the sump wall,install <br /> vacuum fitting in lowest one. <br /> Double wall tank .............. : <br /> Wiring from sensor in Tank interstitial <br /> tank interstice connects Four Vac Sensor <br /> to vac sensor in J box vacuum fittings Housing Assembly <br /> bracketed to riser vacsensorWacseninslall.eps <br /> Figure 1. Installation example of Four Vac Sensor w/tank interstitial monitoring <br /> CAUTION! Use only the materials specified in this manual during installation. Use of any other <br /> • materials or lubricants may damage the SCVS system and will void warranty. Lubricate fittings only <br /> with soapy water-do not use any other materials. <br /> 5 <br />