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D5. Alarm Bell Silencoton D8. Leak ioction The control panel is equipped with a Bell Silence Button which when In the unlikely event the reservoir totally drains,the control panel alarm depressed will silence the alarm bell.If a second alarm condition occurs, will be activated—the warning light will illuminate,the alarm bell will the alarm bell will activate again. sound,and the transmission contacts will activate any accessory alarm devices. The alarm bell can be temporarily silencedb D6. Normal Operation P Y ypusht remains Bell Silence P Button.Under this condition,the"WARNING"light remains on,and the A stable liquid level range in the reservoir indicates that both the inner and "NORMAL"light is off. outer wall of the double-wall tank are leak-free.The liquid level in the See Section C8 on Reservoir Leak Detection reservoir will fluctuate as the temperature of the incoming stored product changes.The reservoir is designed to provide adequate capacity for nor. mal thermal expansion and contraction.As long as the reservoir liquid D9. Control Panel False Alarms level is in the normal range,the"NORMAL"light is illuminated continuously. A control panel false alarm occurs when the panel goes into the alarm mode,but the reservoir liquid level is still in the normal range.Although rare,these types of false alarms typically result from the failure of an elec- D7. Testing and Maintenance tronic component inside the control panel.All electronic components must function properly to maintain the"NORMAL"condition.An elec- The control panel warning system should be checked at least once per trical component failure will result in an"ALARM"condition.Refer to the year.Depress the"TEST BUTTON"switch located on the front of the troubleshooting guide on page 18 to identify the specific problem. control panel to verify that each circuit is operational.This"TEST BUTTON"verifies the operation of the internal circuits of the control panel.However,it does not test the operation of the monitoring sensors. A faulty circuit in the control panel can be diagnosed using the troubleshooting guide(See Figure A).Contact the O/C TANKS Field Service Manager for control panel replacement parts.The phone number is listed in section At 9. Installation Instructions—Switch Panel Models SP1 and SP4 E1 . General E4. Transmission Contact Switch The switch panel will double the number of piping and double-wall tank In the event the pipping sump sensor detects liquid in the piping sensors which can be monitored with the 0/C TANKS supplied electronic sump,0/C TANKSrecommends that the power to the submersible control panels.A switch panel connects a tank sensor and piping sump sump be disconnected.This can beperformed automatically bypro- sensor to one monitoring circuit of the control panel.In an alarm condi- viding an electrical feedback circuit from the monitoring system to tion,when both the tank and piping sump sensor are connected tothe disengage the submersible pump.The transmission contacts inthe elec- samemonitoring circuit.the switch panel is used to determine which sen- tronic control panel can provide the switching mechanism for this feed- %� sor is inthe al arm mode.The switch panels can also be used to connect a back circuit. i1( maximum of two reservoir sensors to each monitoring circuit. The four circuit control panel(Model SB0014B)has four separate sets of Installation of Model SP1 is detailed in this section and Figure D. transmission contacts.When the tank sensor and piping sump sensor are Reference Figure E for Model SP4 circuit diagram. connected in series using a switch panel,an alarm in either sensor would activate the transmission contacts for that monitoring circuit.if the tank sensor and pipe sump sensor are wired on separate monitoring circuits E2. Location using the four circuit control panel.each sensor would activate a separate set of transmission contacts. WARNING:LOCATE THE SWITCH PANEL IN A NON-HAZARDOUS AREA WHERE AN EXPLOSIVE ENVIRONMENT WILL NEVER EXIST, preferably next to the electronic control panel.The switch panel can be E5. Testing wall mounted using the provided mounting hardware. After connecting the tank sensor,the pipe sump sensor,and the switch panel to an operational control panel,activate the sensors to test the total E3. Sensor Circuits system.To test the tank sensor,remove the reservoir sensor from the reser- voir.To test the pipe sump sensor,lift the trip rod on the sensor.Depress the For UL rated applications,the maximum wiring distance between the appropriate push button on the switch panel to temporarily silence the control panel and the sensors is 1,750 feet.However,if a switch panel is alarm.This will determine which sensor is in the alarm mode. used the maximum wiring distance is 875 feet.For intrinsically safe wiring,use 16 AWG or 14 AWG,type THHN or type MTW(contractor sup- plied).Note:Keep intrinsically safe wiring separate from non-intrinsically E6. Leak Detection Using Switch safe wiring.The wiring from the switch panel(from terminals 1 and 2) enters the right conduit at the bottom of the control panel and is con- Panels nected to terminals Sl and G 1. In the unlikely event of an alarm condition,independently depress each On the four circuit control panel(Model SB0014B),there are four terminal push button on the switch panel until the alarm is temporarily silenced. pairs(S1,G1 S2,G2 S3,G3 S4,G4).Connect a separate sensor cir- The push button which silences the alarm indicates which sensor is in the cuit from the switch panel(Model SP4)to each terminal pair.If less than alarm mode. four sensor circuits are used,a jumper wire is required to separate. ly connect each unused terminal pair in the control panel. CAUTION:CONNECT WIRES FROM SWITCH PANEL TO CONTROL PANEL EXACTLY AS SHOWN(SEE FIGURES D AND E)TO MAINTAIN POLARITY AND LEAK DETECTION CAPABILITY. The tank sensor(from the reservoir)and the piping sump sensor are wired to the switch panel.Connect the tank sensor wires to terminal and the white wire to terminal and the sump sensor wires to terminals 5 and 6 in the switch panel.The switch panel is pre-wired so that the tank and f(t pipe sum p sensors are connected i n series. 11