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ISD Vapor Flow Meter Installation Installation Steps-Balance Systems Below Shear Valve <br /> — Black <br /> To <br /> Seal-off , i From <br /> Console i i ISD Flow Meter <br /> , .+ • White <br /> ­6'�1/2"rigid <br /> conduit <br /> Epoxy sealed connections in a <br /> -ate K,m-,.eas weatherproof junction box <br /> Figure 2. Field wiring Vapor Flow Meter-Observe Polarity <br /> Installation Steps - Balance Systems Below 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, if necessary. <br /> 3. Remove any unneeded field installed plumbing between the vapor shear valve and the vapor return line fitting. <br /> Figure 3 shows two example installations of the Vapor Flow Meter with the required lateral or Wye fitting for <br /> running the TP-201.4 back-pressure test. Approximately 3 inches of clearance is required on both sides of the <br /> piping to accommodate the width of the meter body. <br /> Q IMPORTANT: Upper and lower flanges must align to within 1/16"center-to-center before install- <br /> ing flow meter. If piping is improperly aligned,torque could damage the flow meter and result in <br /> vapor leakage. <br /> 4. Connect the lower flange to the pipe that is connected to the lateral or Wye access fitting (see Figure 4). <br /> 5. Install the Vapor Flow Meter over the lower flange. <br /> 6. Connect the upper flange with o-ring above the Vapor Flow Meter. <br /> 7 Using a close nipple,thread the shear valve into the upper flange. <br /> 8. Using nipples, unions, and other plumbing as required, connect the plumbing outlet to the shear valve. <br /> 9. Route the wiring into the junction box via the supplied cord grip assembly. Connect the wires from the Vapor <br /> Flow Meter to the field wiring from the console and cap with wire nuts (see Figure 2) - OR- connect the wires <br /> to the TLS RF transmitter(W2). <br /> 10. 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 /> 8 <br />