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ISD Flow Meter Installation Gwde Installation Stepsum Assist System Above Shear Valve <br /> Installation Steps - Vacuum Assist System Above Shear Valve <br /> 1. Before installing this device,turn Off,tag/lock out power to the system,including console and submersible <br /> pumps. <br /> 2. Remove the dispenser's lower sheet metal doors to access the vapor plumbing. <br /> 3. Loosen any factory installed mounts and/or brackets necessary to provide room to disconnect the vacuum <br /> motor outlet plumbing. <br /> 4. Disconnect the factory installed plumbing between the outlet of the vacuum motors and the field installed <br /> plumbing above the vapor shear valve,if present (see example installation in Figure 1). Retain the <br /> manufacturers installed piping for later use. <br /> 5. Remove any unneeded field installed plumbing above the vapor shear valve.The Vapor Flow Meter with <br /> flanges attached can be used for sizing the required head space of approximately 8 inches.Approximately 3 <br /> inches of clearance is required on both sides of the piping to accommodate the width of the meter body. <br /> 6. Working through the vacuum motor mounting plate,if present,connect the upper flange to factory installed <br /> plumbing.Note that this may need to be temporarily suspended across the vacuum motor mounting plate <br /> while the lower plumbing work progresses. <br /> 7. Install any plumbing and the lower flange that will connect between the outlet side of the Vapor Flow Meter <br /> and the shear valve or lower vapor return line.Note: Elbows should be kept to a minimum(straight vertical <br /> plumbing is preferable).To improve efficiency and to reduce the risk of liquid traps,all horizontal plumbing <br /> must be pitched to drain. <br /> 8. Clean all debris around the inlet and outlet plumbing prior to installing the Vapor Flow Meter.Do not blow <br /> compressed air through the Vapor Flow Meter to prevent damaging the internal screens. <br /> 9. Install the o-ring into the lower mounting flange. <br /> 10. Taking care that foreign material(chips,debris,sealant,etc.) does not enter the open piping or Vapor Flow <br /> Meter,carefully insert the inlet filter and then connect the Vapor Flow Meter to the upper flange.Note that the <br /> flow arrow on the side of the meter body must point down. <br /> 11. Connect the lower flange to the Vapor Flow Meter. <br /> 12. Tighten any loose fittings and hardware <br /> 13. Route the wiring into the junction box via the supplied cord grip assembly. <br /> 14. Connect the wires from theVag or Row Meter to the field wiring from the console and cap with wire nuts (see <br /> Figure 2). <br /> 15. After all other ISD Vapor Flow Meters and the ISD Pressure Sensor are installed,pressurize the tank ullage <br /> space and vapor piping to at least 2 inches WC and test for leaks using leak detection solution. <br /> 4 <br />