Kentec Electronics Sigma XT Plus Operation And Maintenance Manual

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Kentec Electronics Sigma XT Plus Operation And Maintenance Manual Manual pdf 45 page image

Man-1112 Sigma XT+_23 Page 45 of 52K21083M4 and K21084M4 models have a temperature compensationsensor held in place on the power supply chassis with adhesive tape. Thetip of the sensor must be fitted to one of the batteries with the tapesupplied for correct temperature compensation.Battery leads are supplied wired to the power supply along with a link to connect the two batteries together.It is most important that the polarity of the batteries is carefully observed when connecting. Wronglyconnected batteries could cause damage to the control panel.21. MaintenanceSIGMA XT+ control panels do not require any specific maintenance but should the control panel become dirty itcan be wiped over with a barely damp cloth. Detergents or solvents should not be used to clean the panel andcare must be taken that water does not enter the enclosure.The control panel contains sealed lead acid batteries to provide standby power in the event of mains failure.These batteries have a life expectancy of around 4 years. It is recommended that these batteries be tested inaccordance with the battery manufacturer’s recommendations annually to determine their suitability for continuedstandby applications.Testing of the extinguishant system should only be carried out by trained personnel and must be done withappropriate isolation measures in place to ensure that accidental discharge of the extinguishant agent is avoided.Should the control panel become faulty the complete electronic assemblies and front plates can be replaced.To do this, any configured options should be noted then both mains and battery power should be removed beforethe work is started.The field wiring should be carefully labelled and removed from the terminals. The power terminal block can beunplugged from the PCB by pulling it towards you.The faulty PCB plate assembly can now be taken out of the panel by removing the 2 screws.Fitting the new PCB is the reverse of the procedure for removing the board.BATTERYTEMPERATURESENSOR WIRETEMPERATURESENSORTAPE