Sierra Monitor Corporation 3100-01 manual Model 3100 Series Field of View, General

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Instruction Manual

2. OPERATION

2.1General

When the Model 3100 Flame Detector is powered up, the microprocessor checks the configuration switch settings and configures the detector. The mi- croprocessor then runs a full series of self tests. After the self test process is complete and all tests are passed, the detector is ready to detect a fire.

All modes of operation are indicated by two LEDs located on the front of the detector. Normal Mode is indicated by a brief flash of the LEDs every 8 seconds. With the device in Normal Mode it is constantly monitoring the environment and ready to detect a fire.

When a fire is detected the flame detector will acti- vate the Fire Relay and turn on both LEDs. If the device is configured for “Latching” Mode the de- vice will remain in Alarm Mode until power is re- moved. In “Fire Following” Mode the Fire Relay will reset when the Fire Probability Algorithm de- termines there is no longer a fire.

The self test system is continuously monitoring the internal systems. When a fault is detected the Fault Relay is de-energized. In Fault Mode the LEDs

will flash a code indicating the type of fault. A fault indication may mean the device is unable to detect a fire or that a device has become unreliable. (i.e. a “Voltage Low” fault) For most faults the detector will return to Normal Mode when the fault condi- tion is corrected.

The Model 3100 Series comes in several versions. The basic version 3100-01 does not have the Verify or the Auxiliary Relay systems. The enhanced Mod- els 3100-02, -03, -04 and -05 have the Verify and Auxiliary Relay systems. These versions represent the different configurations (Normally Open or Closed contacts) of the Verify andAuxiliary Relays. The Auxiliary Relay provides a separate relay out- put for the Lens Test Fault. The Verify system is activated when a fire is declared. A Verified Fire is declared when the conditions of the Verify Fire Al- gorithm are met. All other functions are the same as the basic Model 3100-01.

The 3100-06 does not have relay outputs. It uses a 4-20 mA current circuit. The detector's status de- termines the amount of current flow through the circuit.

Figure 2-1: Model 3100 Series Field of View

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Model 3100 Series Flame Detector (11/04)

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Contents Model Model Table of Contents Introduction Fault DiagnosticsGeneral Model 3100 Series Field of ViewSW1 SW2 SW3 SW4 SW5 SW9 SW8 Configuration See FigureSW7 SW1 Shown in off position SW6 SW2 Shown in on position Field-of-View See FigureLED Normal FaultFire Relay operation See FigureAuxiliary Fault Fault RelayVerify Relay 5 4-20 mA OperationHousing and Conduit Mounting the Housing General PrecautionsInstalling the Conduit and Wiring Power6 4-20 mA Connections Auxiliary RelayTroubleshooting Model 3100 Series Flame Detector 11/04 Limited Warranty Dimensions WeightField of View Responsivity Input voltage LEDs RelaysFigure A-1 Model 3100 Series Exploded View Figure A-3 Model 3100 Series Common Wiring Connections Figure A-4 Model 3100 Series Enhanced Wiring Connections Verify Control 3100-02, -03, -04 and -05 Models only Appendix B TablesFire OutputLatching Control Detector Non-Latching ControlVerify and Aux. Fault Connector Connectors Fire Relay ConnectorFault Connector Power/Communications ConnectorFire and False Alarm Stimuli Table False Alarm Stimuli TableDetector Response to Fuels Table Appendix C -- Wiring Connections Index Model 3100 Series Flame Detector 11/04
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