Installation And Servicing Instructions - Heatingspares247.com

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WD209/1/2000 Chapter 5 : Fault Finding The Keston Celsius 25 & 25PTHERMOSTAT OVERHEATIs modulation LED1 lit?YIs flow overheat thermostatopen circuit when flowtemperature is < 60 O C?YReplace flow overheatthermostat.NNCheck system for blockageand/or air lock. Reset lockoutby turning user knob off thenon. Check pump is operating.Is modulation LED2 lit?YReplace cabinet thermalfuse and check allcombustion area joints forleaks.NIs modulation LED3 lit?YReset flue overheatthermostat. Does fluetemperature exceed 90 O Cwhen boiler is running atmaximum temperature?NReplace flue overheatthermostat.YCheck gas rate, burnerpressure, combustion levelsand flue and air systems.SERVICE BOILERAFTER ANY THERMOSTAT OVERHEAT IS ACTIVATED THE BOILER WILL NOT RESTART OR CLEAR THE ERROR DISPLAYUNTIL THE UNIT IS RESET MANUALLY BY TURNING THE BOILER OFF THEN ON BY THE USER CONTROL KNOB.Installation & Servicing Instructions Page : 29
WD209/1/2000 Chapter 5 : Fault Finding The Keston Celsius 25 & 25P5.4 FUNCTIONAL FLOW WIRING DIAGRAMPLNESLSL (Link)LORUN1 5CN107CONTROL PCBCN2 CN9 CN3 CN1RI I Q QJ J PD CN11 CN5 L CN41 4 17 1 13 4 1 1 5 17 1BK BK R RHY Y Y R BR BDCFAN24VAC230VACUPR15-60PumpGR BKGB BC CBRBKGYLWPSRM NTransformerFlow ReturnThermistor ThermistorBKFlowStatFlue Cab.Stat StatE GFYFascia PCBGasValveIgnition PCBBCondensateTrapInstallation & Servicing Instructions Page : 36
Page 2 and 3: WD209/1/2000The Keston Celsius 25 &
Page 4 and 5: WD209/1/2000 Chapter 1 : General In
Page 6 and 7: WD209/1/2000 Chapter 1 : General In
Page 8 and 9: WD209/1/2000 Chapter 2 - Boiler Con
Page 18 and 19: WD209/1/2000 Chapter 3 : Installati
Page 20 and 21: WD209/1/2000 Chapter 3 : Installati
Page 22 and 23: WD209/1/2000 Chapter 4 : Commission
Page 24 and 25: WD209/1/2000 Chapter 4 : Commission
Page 26 and 27: WD209/1/2000 Chapter 5 : Fault Find
Page 42 and 43: WD209/1/2000 Chapter 6 : Servicing
Page 44 and 45: WD209/1/2000 Chapter 7 : Replacemen
Page 46 and 47: WD209/1/2000 Chapter 7 : Replacemen
Page 48 and 49: WD209/1/2000 Chapter 8 : Spare Part
Page 50 and 51: WD209/1/2000 Chapter 8 : Spare Part

Installation And Servicing Instructions - Heatingspares247.com

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