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of hardcopy accountability of monitor status and EPA Failure to comply with these warnings could required inventory reports. result in serious personal injury,property loss and The Series X76 LVC portion is designed to monitor liq- equipment damage. uid level, vapor density, pressure and hydrostatic 3.1 Probe Riser Pipe Installation pressure. The system gererates an alarm and may shut down specific facilities if preset parameters are See Installation Drawing for dimensions and in- exceeded. The microprocessor based system stallation requirements. provides visual and audible alarms, self-diasgnostics A. For maximum height to volume conversion ac- and sensor failure indication, fail-safe shutdown and curacy, use one of the threaded bushings auxiliary switch outputs for communications to a closest to the center of the tank and install a facility's remote displays. 4" riser pipe (Ansi pipe Sch. 40). The top end The liquid level sensors will indicate presence of of the riser pipe should be threaded to accept liquids in the annular space of double-wall tanks, a four inch N.P.T., an 950 adapter, and a 950 secondary containment pipes, manhole of caisson locking cap with watertight cable grip, which compartments and in-tank high level to prevent over- are supplied with the probe. Insert a 4" fill. diameter riser pipe; install adaptor and cap. The vapor density, measured by the product's unique B. If the tank is buried, excavate the portion con- vapor transducer, is indicated on the appropriate plug- taining the tank hole to be used. Remove the in module in parts per million (ppm) by means of a 4 plug from the hole and insert the riser pipe as 1/2 digit LED display. The display not only indicates described above. the initial background vapor density in a vadose well Note: Be sure there is enough clearance be- or the annulus of any secondarily contained vessel, tween the top of the riser and the bottom of the but also monitors an increasing trend of vapor den- manhole cover to allow room for the two-wire sity. The self-contained display also provides the cable supplied with the probe. ability to set the alarm and shutdown setpoints without additional calibration equipment. 3.2 Manhole Installation The pressure measurement utilized to monitor pres- Install an #987 square manhole at each probe surized supply piping reads the pressure decay location. Offsetting the probe riser will allow caused by a leak rate greater than 0.05 GPH occur- added ease in junction box installation. ring between automatic test cycles (every 30 minutes). 3.3 Conduit Location A hydrostatic measurement is applied to the annulus of a double-wall tank by detecting a loss of pressure WARNING: Probe to controller conduit must in the pressurized cavity or the loss of liquid level in a not exceed 2,500 feet. See Installation reservoir or the annulus of the tank. Diagram cable notes for proper wiring re- quirements. Runs over 2,500 feet are not U.L. The X76 ETM System, housed in an attractive wall approved for this application. Refer to the mounted NEMA Type 1 Enclosure, contains the intrin- X76 LVC Installation and Operating manual sically safe barrier interface to the transducer, a num- for sensor limitations. ber of three channel alarm modules, vapor modules, and/or dispenser modules. The front door mounted WARNING: Explosion may occur if the con- audible alarm and the flashing alarm lights are ac- troller is installed in a volatile, combustible or knowledged by the ACK button and functionally explosive atmosphere. tested by means of the TEST push button. Failure to comply with these warnings could result in serious personal injury, property loss and equipment damage. (Refer To Installation Drawing) 3.0 SITE PREPARATION A. Select a mounting location on the inside wall of an enclosed building that allows easy ac- WARNING:Take necessary precautions to cess to the controller. When selecting a loca- prohibit vehicles from entering the working area tion, consider the entry path of the probe wire during installation or service. conduit from the underground tanks to the con- troller. The controller should be located with WARNING: During installation and use of this the LCD at eye level. product, comply with the National Electrical Code, federal, state and local codes, and any other ap- B. Run a 3/4" rigid metal conduit between the plicable safety codes. breaker box and the X76 ETM controller for the power wire input. If a plug connector is 4