Saunier Duval THEMA F 23 E Manuel de service

1Heating and hot water for the professionals01773 828100IN WARRANTYTECHNICAL HELPLINE01773 828400THIS IS A CAT II2H3+ APPLIANCETHEMA FInstallation and

10BOILER INSTALLATIONStatutory requirementsThe installation of this boiler must be carried out bya competent person in accordance with the rel-evant r

1123450mini2960255 miniREAR OUTLET FLUE INSTALLATIONB - Rear outlet side flueMark the horizontal centre line on the rear wall.Extend the horizontal ce

12REAR OUTLET FLUE INSTALLATIONExtended flueThe horizontal flue is extended by using one or moreof the 1000 mm extension pipes, Saunier Duval partnumb

13TOP OUTLET FLUE INSTALLATIONTop outlet flue - kit 86151 see diagram 18, is 1000 mm longand comprises:- Outer pipe...

14ELECTRICAL CONNECTIONWarning. This boiler must be earthedAll system components must be of an approvedtype.The mains electrical cable is supplied wit

15COMMISSIONINGImportant:- If this procedure is not carried out properly, the boilerwill go into safety lock-out until all of the air has beenpurged.-

16Des 044COMMISSIONINGOn reaching maximum temperature, the boilershould be turned off and the system drained asrapidly as possible whilst still hot.•

17SETTINGSCHANGING GAS TYPEGas valve settingAll boilers are tested and factory set during manu-facture. Should it be necessary to reset a gas valve,fo

18To ensure the continued efficient and safe opera-tion of the boiler it is recommended that it ischecked and serviced at regular intervals. The fre-q

19REPLACEMENT OF PARTS• Undo and remove screw securing spark genera-tor to bracket and remove spark generator.• Fit replacement spark generator in rev

2INSTALLATION AND SERVICING INSTRUCTIONSTHEMA F 23 E - THEMA F SB 18 E - THEMA F SB 23 ENote!The boiler serial number is marked on the label attached

20• Fit replacement PCB in reverse order to removal.Important: When fitting replacement PCB, ensurethat control knob spindles correctly locate into PC

21REPLACEMENT OF PARTS• Push water valve back to disengage it from re-versing valve.• Unclip and remove loss of water pressure switchfrom left of reve

22• Remove clip holding pipe to heat exchanger inrear of water valve. From front of boiler, grip clipwith long nosed pliers and pull upwards.• Unscrew

23REPLACEMENT OF PARTSTo replace safety valve• Drain down entire heating system.• From below boiler, disconnect heating flow pipefrom rear of fixing j

24REPLACEMENT OF PARTS• Unclip thermistor from pipe.• Pull off electrical cennections from thermistor.• Fit replacement thermistor in reverse order to

25SCHEMATIC WIRING DIAGRAMSch 242IG - ON/OFF switchP - PumpSW3 - MicroswitchK4 - Hight limit thermostatK5 - Loss of water switchEV1 - Gas valve modula

26FAULT FINDINGPrior to fault finding, check :Inlet gas pressure = 20 mbarElectrical supply = 240 V - 50 HzCentral heating system is pressurised at 1

27FAULT FINDINGNO HOT WATERReplace main pcbRefer to chart n°2Check mains watersupply, water filterIs there at least 3 litres/minwater flow at tap ?Rem

28108198 B 06/98

3INTRODUCTIONThe THEMA F 23 E boiler is a wall mounted modulat-ing combination boiler with electronic ignition pro-viding central heating and instanta

4Burner injector mm 1,20 1,20 1,20Inlet pressure mbar 20 20 20Diaphragme mm — — —Gas rate (maximum) m3/h 2,70 2,17 2,70Gas rate (minimum) m3/h 1,13 1,

5Available pressure (kPa) between heatingflow and return(10 kPa = 1 m WG)1234550403020100500 100012354Flow rate through heating system (I/h)Pump :The

6BOILER SCHEMATICShy 131AB CDE45143171989101113121620216242223Diagram 43-Ignition module4-Heating temperature adjuster5-Hot water temperature adjuster

7THEMA F 23 EFrom left to right, the fixing jig comprises:A - Heating return with isolating valve (m).B - Cold water inlet with isolating valve (p).C

8HEATING SYSTEM DESIGNDiagram 6• The THEMA F boiler is compatible with any type ofinstallation.• Heating surfaces may consist of radiators, convec-tor

923450mini2960255 miniBOILER LOCATIONClearancesThe position of the boiler must be such that there isadequate space for servicing.The recommended clear