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,s xs Pressure Sensor Installation Special Conditions for Safe Use WARNING , Wp Explosion could occur if other wires share ducts with intrinsically safe probe or sensor 'vJ�% wiring. Ducting from probes and sensors must not contain any other wiring circuits. Failure to comply with this warning could result in explosion,death,serious personal injury, property loss or equipment damage. ' Special Conditions for Safe Use All installations must be made in accordance with the Descriptive System Documentation found in manual ' 577013-578. Before You Begin ' Review and comply with all the health and safety warnings in the installation manuals and any other national or local requirements. • When direct wiring to a TLS console,a 2-conductor, 18 AWG, or equivalent, shielded cable must be installed in intrinsically safe conduit from the dispenser or from the vapor vent stack to the TLS console. • The Pressure Sensor must be installed in a VERTICAL position with the sensing port pointing down. Its connection in the base of the dispenser to the vapor return line must be made BELOW the vapor return line shear valve mechanism, AND BELOW the Vapor Flow Meter outlet (if a flow meter is installed). • For all connections requiring sealant, use only UL classified yellow Gas/TFE Teflon tape. ' • When installing on a vent stack, customer supplied pipe and pipe fittings shall be standard full-weight (ASTM Schedule 40, or equivalent) wrought iron or steel. • Customer supplied copper tubing shall be soft tempered, 1/4-inch O.D., with a minimum wall thickness of 0.0265 inches. • Pipe threads shall be in accordance with the Standard for Pipe Threads, General Purpose (Inch) ANSI/ASME ' 81.20.1-1983, or equivalent. • When installing the vapor pressure sensor in a dispenser, the drying tube must be mounted above grade and the Tygon tubing connecting the vapor pressure sensor to the drying tube must be attached to the up port of the drying tube. The down port must be left open to atmosphere. When installing the vapor pressure sensor in a vent stack enclosure, the Tygon tubing connecting the vapor pressure sensor to the drying tube must be attached to the down port of the drying tube.The up port must be ' left open to atmosphere. Veeder-Root Parts Veeder-Rootarts and kits required to install the Vapor Pressure Sensor either in a dispenser or on a vent stack p q P p are listed in Table 1,Table 2 and Table 3. Installations of the Vapor Pressure Sensor on a vent stack will require the parts listed in Table 4 as well. ' 4