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ISD Vapor Flow Meter Installation Installation Steps-Balance Systems Above Shear Valve Installation Steps - Balance Systems Above Shear Valve le-TA 1. Before installing this device,turn off,tag/lock out power to the system, including console and submersible pumps. 2. Remove the dispenser's lower sheet metal doors to access the vapor plumbing. 3. Loosen any factory installed mounts and/or brackets in order to provide room to disconnect any factory installed vapor return plumbing from the shear valve. 4. Disconnect the factory installed vapor return plumbing from the vapor shear valve (see Figure 1). 5. Remove any unneeded field installed plumbing above the vapor shear valve.The Vapor Flow Meter with flanges attached can be used for sizing the required head space of approximately 8 inches.Approximately 3 inches of clearance is required on both sides of the piping to accommodate the width of the meter body. 6. Thread one of the flanges (two provided in installation kit) onto the dispenser vapor return piping. Note: Prior to modifying any piping in the dispenser, consult the dispenser manufacturer to determine if ISD ready retrofit kits are available. Any factory installed plumbing that must be modified in order to install the va- por flow meter, must be removed to a non hazardous work area before any cutting or threading takes place. After modifications to any plumbing, it must be reinstalled in accordance with the dispenser manufacturers in- stallation guidelines. 7. Install any necessary plumbing and the lower flange above the vapor shear valve. Note: The use of 90°elbows should be kept to a minimum to minimize pressure drop, maximize vapor collec- tion efficiency and to prevent liquid traps. All horizontal plumbing must pitch to drain. Q IMPORTANT: Upper and lower flanges must align to within 1/16"center-to-center before install- ing flow meter. If piping is improperly aligned,torque could damage the flow meter and result in vapor leakage. 8. Clean all debris around the inlet and outlet plumbing prior to installing the Vapor Flow Meter. Do not blow compressed air through the Vapor Flow Meter to prevent damaging the internal screens. 9. Install the o-ring into the lower mounting flange. 10. Taking care that foreign material (chips, debris, sealant, etc.) does not enter the open piping or Vapor Flow Meter, carefully insert the o-ring and then connect the Vapor Flow Meter to the upper flange. Note that the flow arrow on the side of the meter body must point down. 11. Connect the lower flange to the Vapor Flow Meter. 12. Tighten any loose fittings and hardware 13. Route the wiring to the TLS RF transmitter (W2) or into the junction box via the supplied cord grip assembly when direct wiring to a TLS console. 14. Connect the wires from the Vapor Flow Meter to the field wiring from the console and cap with wire nuts (see Figure 2). Not required when connecting to the TLS RF transmitter (W2). 15. After all other ISD Vapor Flow Meters and the ISD Pressure Sensor are installed, pressurize the tank ullage space and vapor piping to at least 2 inches WC and test for leaks using leak detection solution. 6