Ideal Boilers isar m30100 Installation And Servicing

4isar - Installation and ServicingGENERAL1 BOILER WATER CIRCUIT DIAGRAMSINTRODUCTIONThe isar m30100 is a wall mounted, full sequence, automaticspark ignition, low water content, fanned flue, high efficiency,condensing, combination gas boiler.Note.Due to the high efficiency of the boiler a plume of watervapour will form at the terminal during operation.Central heating (CH) output is fully modulating with a range of8.8 to 23.4kW (30,000 to 80,000 Btu/h)Instantaneous domestic hot water (DHW) output is also fullymodulating with a maximum of 29.3kW (100,000 Btu/h)The boiler is supplied fully assembled with DHW plate heatexchanger, diverter valve, circulating pump, pressure gauge,safety valve and CH expansion vessel.Variable CH and DHW temperature controls are fitted on theuser control and the boiler features a DHW preheat facility.The boiler casing is of white painted mild steel with the usercontrols capable of being mounted remotely from the boiler if theoption is required.The boiler temperature controls are visible at the bottom RHS ofthe front panel.The heat exchanger is of cast aluminium.The boiler is suitable for connection to fully pumped, sealedwater systems ONLY. Adequate arrangements for completelydraining the system by provision of drain cocks MUST beprovided in the installation pipework.Pipework from the boiler is routed downwards as standard, butmay be routed upwards behind the boiler using the stand-offframe (supplied in a separate kit).OPERATIONWith no demand for CH, the boiler fires only when DHW isdrawn off, or periodically for a few seconds without any DHWdraw-off, in order to maintain the DHW calorifier in a heatedcondition.When there is a demand for CH, the heating system is suppliedat the selected temperature of between 30 o C and 82o C, untilDHW is drawn off. The full output from the boiler is thendirected via the diverter valve to the plate heat exchanger tosupply a maximum DHW draw-off of 12 l/min at 35 oCtemperature rise.At low DHW draw-off rate the maximum temperature is limited to65 oC by the modulating gas control.Refer also to Frame 1 - 'Boiler Water Circuit Diagrams'The boiler features a comprehensive diagnostic system whichgives detailed information on the boiler status when operating,and performance of key components to aid commissioning andfault finding.Central Heating CircuitExpansionvesselAutomaticair ventGas valvePlate heatexchangerPumpSafetyrelief valveCondensate'S' trapDivertervalveWaterpressuregaugeSumpFanBurnerCH FlowGasCondensate drainDischarge pipeCH ReturnDomestic Hot Water CircuitExpansionvesselAutomaticair ventHeatexchangerGas valvePumpSafetyrelief valveCondensate'S' trapDivertervalveWaterpressuregaugeSumpFanBurnerDHW Hot outGasCondensate drainDischarge pipeEcl 2388DHW Cold inPlate heatexchangerHeatexchanger