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El. General Switch Panel Information • The switch panel doubles the number of combined piping and double-wall tank sensors which can be monitored with Fluid Containment supplied electronic control panels. • It connects a tank sensor and containment collar sensor to one monitoring circuit of the control panel. • Two tank sensors may NOT be connected to the same monitoring circuit of the switch panel. • In an alarm condition - when both the tank and contain- ment collar sensor are connected to the same monitoring circuit - the switch panel is used to determine which sensor is in the alarm mode. E2. Location Locate switch panel in a nonhazard- AWARNING ous area where an explosive environ- ment will never exist, preferably next to the electronic control panel. Note: Switch panel can be wall mounted using the pro- vided mounting hardware. E3. Sensor Circuits CAUTION: Connect wires from switch panel to control panel exactly as shown (see Figures D and E, page 31) to maintain polarity and leak detection capability. Wiring Distance Between Control Panel and Sensors. • When SP -I or SP -4 switch panel is used in UL rated applications, maximum wiring distance is 450 feet. For Intrinsically Safe Wiring: • Install wiring from switch panel terminals I and 2 into the right conduit at bottom of control panel and connect to terminals SI and G1. • Use 16 AWG or 14 AWG, Type THHN or Type MTV (contractor supplied). ❑ Keep separate from non -intrinsically safe wiring. For SP4 Switch Panel: • Connect separate sensor to each of four terminal pairs on the four circuit control panel (Model S130014C). ❑SI,GI ❑S3,G3 ❑ S2, G2 ❑ S4, G4 Important: If less than four sensor circuits are used, a jumper wire is required to separately connect each un- used terminal pair in control panel. How to Wire Sensors: • Wire tank sensor (from reservoir) and containment col- lar sensor to switch panel. • Connect tank wires to terminals 3 and 4, with black wire to terminal 3. • Connect collar sensorwires to terminals 5 and 6 in switch panel. ❑ Switch panel is pre -wired so that tank and contain- ment collar sensors are connected in series. E4. Transmission Contact Switch Disconnect Power to Submersible Pump When Liquid is Detected in Containment Collar: • Can be done automatically by providing an electrical feedback circuit from monitoring system. • Transmission contacts in electronic control panel can pro- vide switching mechanism for feedback circuit. Model SB0014C (four circuit control panel) • Has four separate sets of transmission contacts. ❑ When tank sensor and containment collar sensor are connected in series using a switch panel, an alarm in either sensor activates the transmission contacts for that monitoring circuit. ❑ If tank sensor and containment collar sensor are wired on separate monitoring circuits, using the four circuit control panel, each sensor activates a sepa- rate set of transmission contacts. E5. Testing To test total system: • Connect tank sensor, containment collar sensor and switch panel to an operational control panel. • Activate the sensor. To test tank sensor: • Remove reservoir sensor from reservoir. • An alarm should sound. To test pipe sump sensor: • Lift trip rod on sensor. • An alarm should sound. To determine which sensor is in alarm mode: • Depress appropriate push button switch panel to tempo- rarily silence alarm. E6. Leak Detection Using Switch Panels In event of alarm condition: • Independently depress each push button on switch panel until alarm is temporarily silenced. ❑ Button that silences alarm indicates that the silenced sensor is in alarm mode. 19