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Interstitial Liquid Sensor Installation Guide Installation of Float Switch <br />Weatherprooy.unction box with <br />14" min. dia. manhole 1/2 -inch N.P.T. threads (16 Cubic <br />inch volume minimum) <br />Cord grips <br />P q.r <br />0. ds VD. <br />Seal -off <br />1/2" rigid conduit (to Console) <br />Riser length <br />4" dia. riser <br />Sensor Switch must �, Fiberglass tank <br />reach bottom of tan <br />Part numb. <br />Pull -cord eyelet <br />Figure 1. Sensor Dimensions and Installation Requirements - Fiberglass Tank <br />Red Reference Dot <br />[4 ft (1.22 m) up from <br />sensor switch] <br />Riser <br />F6�a� <br />.�1z Fiberglass Tank — <br />YPull Corri <br />\ Red Reference Dot <br />(facing down) sensors\intsstt.eps <br />Figure 2. Correct sensor orientation entering top of tank annulus <br />Red dots are painted on the top of the switch and 4 feet up the sensor, for switch orientation references during <br />installation. When installing the sensor, start the sensor in the annulus with the red dot facing down (Figure 2). This way <br />the switch will be orientated correctly at the bottom of the tank with the red dot facing up (Figure 3). <br />iJ <br />