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9 0 ISD Pressure Sensor Installation Installation Steps Installation Steps n4��; 1. Before installing this device, turn Off, tag/lock out power to the system, including console and submersible pumps. 2. Determine which dispenser is closest to the tank being monitored. Remove that dispenser's lower sheet metal doors to gain access to the vapor plumbing, 3. Locate a suitable port or plumb a suitable "T" fitting in one of the locations listed below (listed in order of preference): a. The main vapor return line (see Figure 1) - this is the preferred position, b. In the vapor return line between shear valve and main vapor return line, or c. If the vapor flow meter is above the vapor shear valve, in the shear valve housing below the shear valve mechanism, Mote: 1 to 2 ports are typically available on a shear valve, If you have to use one of these ports, make certain it accesses the plumbing beiow the valve mechanism. 4. Install one of the 68CA-4-4 male connecters (item 2 in Table 1) from the kit into the tapped hole. 5. Install ISD Pressure Sensor (item 1 in Table 1) vertically to the dispenser frame or piping using the 2 -inch conduit clamp, rubber shim, and necessary bolts, nuts, and washers from the included Universal Sensor Mounting kit. Wrap the rubber shim (item 10 in Table 1) around the sensor before inserting it into the clamp. Also make sure the sensor cable outlet is facing up and the pressure sensing port tube in the base of the sensor is facing down. 6. Attach one end of the 62CA-4 union (item 3 in Table 1) to the pressure sensing port in the base of the ISD Pressure Sensor. 7. Install the remaining 68CA-4-4 male connectors (item 2 in Table 1) from the kit into each of the three ports in the 3 -way calibration valve (item 13 in Table 1). 8. Measure, fabricate, and install a 1/4" OD copper tube (item 12 in Table 1) that runs between the 62CA-4 union in the base of the sensor and the center port of the 3 -way calibration valve. 9. Measure, fabricate, and install a 1/4" OD copper tube that runs between the 1/4" tube end of the male connector fitting installed beneath the shear valve and one of the two unused ports on the 3 -way valve, being careful not to create any potential liquid traps, 10.Screw the 59CA-4 plug, item 4, from the kit onto the last port's male connector. Make sure the valve's handle is set to connect the sensor to the vapor return line and not to the capped (ambient) port. Important! All plumbing's pitch to drain should be 1/4" vertical per 12" horizontal to eliminate liquid traps. 1 1.Route the cable from ISD Pressure Sensor to the ISD Flow Meter/ISD Pressure Sensor junction box in the dispenser. Observing polarity, connect the sensor wiring to the field wiring from console and cap with wire nuts (see Figure 2). 4