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r <br /> lilt <br /> onitoring the Attached Collar Riser Alternative Tank-Monitoring Systems <br /> The optional attached collar riser provides containment for Liquid Sensor Monitoring Systems <br /> leakage from the submersible pump. Should double wall pip- <br /> ing be used, a leak in the primary piping will drain to the <br /> attached collar riser. Concrete Traffic Pad --+ <br /> Typical configuration for <br /> an electronic sensor or <br /> manual dipstick. Riser Pipe <br /> Monitor <br /> Note: Monitoring cavity Fitting <br /> can be vented to atmos- <br /> phere or sealed_ <br /> DryAnnular Space <br /> t.iguid-Sensing Probe <br /> Vacuum and Air-Pressure Monitoring Systems <br /> (Dry Annular Space) <br /> Notes: Concrete Traffic Pad—; <br /> 1.Maximum continuous <br /> positive air pressure is Vacuum or Air- <br /> So monitor the unwanted presence of liquid inside the riser, 3 psi. Riser Pressure Sensor <br /> n optional electronic sensor is mounted at a specified osi Pipe <br /> P P P 2.Maximum continuous Monitor <br /> tion on the wall of the attached collar riser. The unit permits vacuum is 3-mercury Fitting <br /> continuous electronic monitoring through the control panel. (1.5 PSI maximum) <br /> The solid-state sensor consists of a liquid-level sensing element must be maintained. <br /> that is activated when a liquid rises to a predetermined and <br /> unacceptable level in the riser. The level is sensed and con- <br /> verted to a voltage output, which in turn activates the alarm <br /> system. <br /> Installation <br /> The manufacturer's instruction manual, covering installation, <br /> operation and maintenance of the monitoring system, is avail- <br /> able from Xerxes sales representatives.A copy of the manual <br /> will be sent with each unit. T a <br /> Note that the monitoring system must be installed in accor- <br /> dance with the manufacturer's instructions, and all federal, <br /> state, and local laws and regulations. <br /> i <br /> AL <br /> 15 <br />