Keston Combi 35kw User Manual

Installation and Servicing InstructionsFAN POWERED HIGH EFFICIENCYMODULATING DOMESTIC CONDENSINGGAS COMBINATION BOILERCE/PI No. 86-CL-38Combi 30 - GC

10 Keston Combi - Installation and ServicinggeneralGeneral1. The installation must comply with all relevant national and local regulations.2. The in

11Keston Combi - Installation and Servicinggeneral The boiler does not normally need a bypass but at least some radiators on the heating circuit, of l

12 INSTALLATIONKeston Combi - Installation and Servicing6 BOILER ASSEMBLY - Exploded View22722450331350450551221521730930630821121420620520422333232

13INSTALLATIONKeston Combi - Installation and Servicing 7 UNPACKINGUnpack and check the contents.Pack 1 ContentsA BoilerB Hardware Pack BoxC Wall Mo

14 INSTALLATIONKeston Combi - Installation and Servicing FLUE OUTLET8 FLUE SYSTEMIMPORTANTWhen installing a replacement boiler a new ue system must b

15INSTALLATIONKeston Combi - Installation and Servicing FLUE OUTLET SLOPE‘Horizontal’ ue outlet pipework MUST slope at least 1.5 degrees (26mm per me

16 INSTALLATIONKeston Combi - Installation and Servicing FLUE OUTLET10 FLUE INSTALLATION EXAMPLE KESTON COMBI 3011 FLUE INSTALLATION EXAMPLE KESTON CO

17INSTALLATIONKeston Combi - Installation and Servicing FLUE OUTLET 12 FLUE TERMINATION POSITIONTwin Flue PositionsBelow an opening (1)Above an openin

18 INSTALLATIONKeston Combi - Installation and Servicing13 INSTALLING THE BOILERInstallation of the boiler is straightforward but consideration must

19INSTALLATIONKeston Combi - Installation and Servicing esp9496Example of fixing17 MOUNTING THE BOILER1. Ensure the plastic plugs are removed from b

2 Keston Combi - Installation and Servicing

20 INSTALLATIONKeston Combi - Installation and Servicing FLUE OUTLET18 ASSEMBLY PRACTICERemove all plastic debris and burrs when installing air intake

21INSTALLATIONKeston Combi - Installation and Servicing FLUE OUTLET 19 FITTING THE FLUE SLEEVEFlue SleeveFlue PipeFlueTerminalFlexibleWallSeal WallPl

22 INSTALLATIONKeston Combi - Installation and Servicing20 CONDENSATE DRAIN20347149CondensateDrainThis appliance is tted with a siphonic 75mm conden

23INSTALLATIONKeston Combi - Installation and Servicing 21 CONDENSATE DRAIN - CONT’D...Visible air breakCondensate pump(Install in accordance wit

24 INSTALLATIONKeston Combi - Installation and ServicingBlueHandleBlackHandleBlackHandleBlackHandleYellowHandleFillingLoopCH FlowDHWOutletGasSupplyDHW

25INSTALLATIONKeston Combi - Installation and Servicing 24 INTERNAL WIRING The Keston Combi boiler comes pre-tted with 1.8m of mains cable. This mu

26 INSTALLATIONKeston Combi - Installation and Servicing3G9560NLNFROSTSTAT(OPTIONAL)ROOMSTAT/TIMERRoomStat orProg.RoomStatOptionalFrost StatDIAGRAM AI

27INSTALLATIONKeston Combi - Installation and Servicing 26 REPLACING PRE-FITTED MAINS CABLEIf it is necessary to use an alternative mains cable to th

28 INSTALLATIONKeston Combi - Installation and Servicing28 CH OPERATIONThe On and Off time control of central heating should be controlled by a separa

29INSTALLATIONKeston Combi - Installation and Servicing 29 EXTERNAL ELECTRICAL CONTROLSWiring External to the BoilerThe fuse rating should be 3A.Wiri

3Keston Combi - Installation and Servicing Relevant Installation changes implemented in this book from Mod Level ... A02 (Oct 12) and A03 (Feb 14)DO

30 INSTALLATIONKeston Combi - Installation and Servicing30 WIRING DIAGRAMFlueThermostatTimerrbbkorbk1X1X2X3X5X6X823456123451234568791234123456X712345

31INSTALLATIONKeston Combi - Installation and Servicing WARNING. Whilst effecting the required gas tightness test and purging air from the gas install

32 INSTALLATIONKeston Combi - Installation and Servicing32 INITIAL LIGHTING1. Check that the system has been lled and that the boiler is not airloc

33INSTALLATIONKeston Combi - Installation and Servicing THE DISPLAYThe user control has one neon and one display to inform the user about the status.

34 INSTALLATIONKeston Combi - Installation and Servicing34 INITIAL LIGHTING . . . . CONT’DINSTALLER MODEInstaller Mode is entered as follows:1. Tur

35INSTALLATIONKeston Combi - Installation and Servicing INSTALLATION36 GENERAL CHECKSDOMESTIC HOT WATER (DHW) MODE1. Fully open all DHW taps in turn

36 INSTALLATIONKeston Combi - Installation and Servicing37 HANDING OVER8. Loss of system water pressure Explain that the dial underneath the boile

37SERVICINGKeston Combi - Installation and Servicing 38 SERVICING SCHEDULEFor the very latest copy of literature for specication & maintenance

38 SERVICINGKeston Combi - Installation and Servicing39 BOILER FRONT PANEL REMOVAL / REPLACEMENTREMOVAL1. Loosen the two screws retaining the front

39SERVICINGKeston Combi - Installation and Servicing 41 BURNER REMOVAL AND CLEANING1. Ensure the sump is fully drained2. Undo the two screws and re

4 Keston Combi - Installation and ServicinggeneralTable 1 - General DataNote. Gas consumption is calculated using a caloric value of 38.7 MJ/m3 (1038

40 SERVICINGKeston Combi - Installation and Servicing343 CLEANING THE HEAT EXCHANGERNote: Ensure the condensate trap/siphon is fully drained before cl

41SERVICINGKeston Combi - Installation and Servicing 45 REPLACEMENT OF COMPONENTSGENERAL When replacing ANY component1. Isolate the electricity sup

42 SERVICINGKeston Combi - Installation and Servicing54447 BURNER INJECTOR REPLACEMENT1. Refer to Frame 45.2. Disconnect the electrical leads from

43SERVICINGKeston Combi - Installation and Servicing 49 RETURN THERMISTOR RENEWAL1. Refer to Frame 44.2. Unclip the return thermistor from the ret

44 SERVICINGKeston Combi - Installation and Servicing51 IGNITION ELECTRODE REPLACEMENT1. Refer to Frame 45.2. Remove the burner. Refer to Frame 48

45SERVICINGKeston Combi - Installation and Servicing 54 GAS CONTROL VALVE REPLACEMENT1. Refer to Frame 45.2. Unplug the electrical plug connection

46 SERVICINGKeston Combi - Installation and Servicing55 DIVERTER VALVE ACTUATOR REPLACEMENT1. Refer to Frame 45.2. Remove the electrical plug.3. U

47SERVICINGKeston Combi - Installation and Servicing 57 MAIN PCB REPLACEMENTNote. Fit the earth strap provided with the PCB to your wrist and secure t

48 SERVICINGKeston Combi - Installation and ServicingNote. Fit the earth strap provided with the PCB to your wrist and a suitable earth on the boiler

49SERVICINGKeston Combi - Installation and Servicing 1. Refer to Frame 45.2. Drain the heating system. Refer to Frame 65.3. Unscrew the pressure g

5Keston Combi - Installation and Servicinggeneral Boiler size G.C. Appliance No. PI No. (Benchmark No.)30 47-930-04 86 CL 3835 47-930-05 86 CL

50 SERVICINGKeston Combi - Installation and Servicing62 SAFETY RELIEF VALVE RENEWAL1. Refer to Frame 45.2. Drain the boiler. Refer to Frame 60.3.

51SERVICINGKeston Combi - Installation and Servicing 65 DIVERTER VALVE INTERNAL CARTRIDGE REPLACEMENTFRONT CARTRIDGE REPLACEMENT1. Refer to Frame 45

52 SERVICINGKeston Combi - Installation and Servicing1. Refer to Frame 45.2. Drain the boiler. Refer to Frame 60.3. Remove condensate trap/siphon.

53SERVICINGKeston Combi - Installation and Servicing 69 DHW FILTER CLEANING / REPLACEMENT1. Refer to Frame 45.2. Isolate the mains cold water suppl

54 SERVICINGKeston Combi - Installation and Servicing1. Refer to Frame 45.2. Drain down the boiler. Refer to Frame 60.3. Unplug the electrical lea

55SERVICINGKeston Combi - Installation and Servicing 72 HEAT ENGINE RENEWALRefer also to Frame 6 - ‘Boiler Exploded View’IMPORTANTBefore starting the

56 SERVICINGKeston Combi - Installation and Servicing74 BOILER SEALING PANEL SEAL REPLACEMENT73 EXPANSION VESSEL RECHARGING & REPLACEMENTRECHAR

57Fault FindingFault Finding Fault Finding Fault Finding Fault Finding Fault FindingKeston Combi - Installation and Servicing 75 FAULT FINDING CHART

58 Fault FindingFault Finding Fault Finding Fault Finding Fault Finding Fault FindingKeston Combi - Installation and Servicing76 OVERHEAT LOCKOUT -

59Fault FindingFault Finding Fault Finding Fault Finding Fault Finding Fault FindingKeston Combi - Installation and Servicing 78 FAULT 8 - CONTAC

6 Keston Combi - Installation and ServicinggeneralINTRODUCTIONThe Keston Combi boiler is a wall mounted, full sequence, automatic spark ignition, low

60 Fault FindingFault Finding Fault Finding Fault Finding Fault Finding Fault FindingKeston Combi - Installation and Servicing80 FLAME LOSS - 1 C

61Fault FindingFault Finding Fault Finding Fault Finding Fault Finding Fault FindingKeston Combi - Installation and Servicing 82 RETURN THERMISTOR FA

62 Fault FindingFault Finding Fault Finding Fault Finding Fault Finding Fault FindingKeston Combi - Installation and Servicing84 FLOW THERMISTOR FAUL

63Fault FindingFault Finding Fault Finding Fault Finding Fault Finding Fault FindingKeston Combi - Installation and Servicing 88 NO DISPLAYIs there 2

64 SPARE PARtSKeston Combi - Installation and ServicingWhen replacing any part on this appliance use only spare parts that you can be assured conform

65Keston Combi - Installation and Servicing

© Heating and Hotwater Industry Council (HHIC)www.centralheating.co.ukBenchmark Commissioning andServicing Section It is a requirement that the boiler

* All installations in England and Wales must be to Local Authority Building Control (LABC) either directly or through a Competent Persons Scheme. A

* All installations in England and Wales must be to Local Authority Building Control (LABC) either directly or through a Competent Persons Scheme. A

7Keston Combi - Installation and Servicinggeneral SAFETYCurrent Gas Safety (installation and use) regulations or rules in force: The appliance is suit

70 Keston Combi - Installation and ServicingFLOWCHART FOR CO LEVEL AND COMBUSTION RATIOCHECK ON COMMISSIONING A CONDENSING BOILERImportant Preliminary

71Keston Combi - Installation and Servicing NoNoYesNoNoYesYesYesYesNoIsCO level less than 350ppm AND CO/CO2 ratio less than0.0040?Turn off Appliance a

February 2014 UIN 207895 A03Keston pursues a policy of continuing improvement in the design and performance of its products. The right is there

8 Keston Combi - Installation and ServicinggeneralGAS SUPPLYThe local gas supplier should be consulted, at the installation planning stage, in order t

9Keston Combi - Installation and Servicinggeneral 1 BOILER DIMENSIONS, SERVICES & CLEARANCESall dimensions in mmThe boiler connections are made o