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E1. General Switch Panel Information • The switch panel will double the number of combined piping and double-wall tank sensors which can be monitored with Owens-Corning 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 containment 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 Non -Hazardous AWARNING Area Where an Explosive Environment Will Never Exist, Preferably Next to the Electronic Control Panel. Note: Switch panel can be wall mounted using the provided mounting hardware. E3. Sensor Circuits CAUTION: Connect wires from switch panel to control panel exactly as shown (see Figures D and E, page 32) to maintain polarity and leak detection capability. Wiring Distance Between Control Panel and Sensors. -When SP -1 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 1 and 2 into the right conduit at bottom of control panel and connect to terminals S 1 and G 1. • Use 16 AWG or 14 AWG, Type THHN or Type MTW (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 SB0014C). ❑ S1, G1 ❑ S3, G3 ❑ S2, G2 ❑ S4, G4 Important: If less than four sensor circuits are used a jumper wire is required to separately connect each unused terminal pair in control panel. How To Wire Sensors: • Wire tank sensor (from reservoir) and containment collar sensor to switch panel. • Connect tank wires to terminals 3 and 4, with black wire to terminal 3. • Connect collar sensor wires to terminals 5 and 6 in switch panel. ❑ Switch panel is prewired so that tank and containment 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 provide 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 con- nected 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 separate 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 temporarily 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