VOKERA Linea Service Manual

Installation& ServicingInstructionsTHESE INSTRUCTIONSTO BE RETAINEDBY USERLinea

8LineaPipe work from the meter to the appliance mustbe of adequate size. Pipes of a smaller size thanthe appliance gas inlet connection must not beus

9Linea3A.9 MOUNTING ON A COMBUSTIBLE SURFACEIf the appliance is to be fitted on a wall of com-bustible material, a sheet of fireproof materialmust pro

10LineaHorizontal flue terminals and accessoriesPart No. Description Min-Max Length2359029 Standard flue kit. For 833mmuse with add. Bends & (dim

11LineaYou must ensure that the entire flue system isproperly supported and connected.Seal the flue assembly to the wall using cementor a suitable alt

12LineaIMPORTANTThe vertical flue terminal is 1.0 metre in lengthand cannot be cut; therefore it may be necessaryto adjust the height of the appliance

13Linea4.5.3.1 INSTALLATION OF TWIN ADAPTOR KIT (fig.10)●●●●● Insert the exhaust connection manifold onto theappliance flue outlet.●●●●● Place the sil

14Linea4.5.3.4 VERTICAL TERMINATION (See fig. 13)The twin flue system must be converted to thededicated concentric flue kit for termination.●●●●● The

15Linea4.6.3 COLD WATER INLET (fig. 6 & 14)The appliance is supplied with a 15mm combinedstopcock and double check-valve, connect a15mm pipe to th

16LineaFig. 16Connect the supply cable wires (LIVE, and NEU-TRAL) to their corresponding terminals on theappliance terminal block. Connect the EARTHwi

17LineaSECTION 5 COMMISSIONING5.1 GAS SUPPLY INSTALLATIONInspect the entire installation including the gasmeter, test for soundness and purge. R

ContentsDesign principles and operating sequence Page1.1 Principle components 21.2 Mode of operation (at reset) 21.3 Mode of operation (Heating) 21.4

18LineaOnce the burner pressure has been checked,close the DHW outlet, isolate the appliance fromthe electrical supply, remove the manometer, andtight

19Linea5.12 FINAL CHECKS●●●●● ENSURE ALL TEST NIPPLES ON THE AP-PLIANCE GAS VALVE HAVE BEN TIGHT-ENED AND CHECKED FOR SOUNDNESS.●●●●● ENSURE THE APPLI

20Linea6.4 COMPONENT REMOVAL PROCEDURETo remove a component, access to the interior ofthe appliance is essential. Isolate the appliancefrom the elect

21Linea6.9 PRESSURE GAUGE fig. 23Carry out component removal procedure as de-scribed in 6.4.Remove pressure gauge locking screw (1), lo-cated on pump

22LineaNOTEEnsure that any replacement PCB has the cor-rect ‘Jumper Tag’ configuration (see section 8).6.13 GAS VALVE fig. 27Carry out component remov

23LineaFig. 29Fig. 30

24LineaFig. 316.17 MAIN HEAT EXCHANGER fig. 31Carry out component removal procedure as de-scribed in 6.4.Unclip and remove the air chamber cover, gent

25LineaFig. 336.20 DHW FLOW SWITCH fig. 33Carry out component removal procedure as de-scribed in 6.4.Disconnect and remove the cold water inlet pipe(1

26Linea6.25 AUTOMATIC BYPASS fig. 38Carry out component removal procedure as de-scribed in 6.4.Disconnect and remove the flow pipe at the heat-ing man

27LineaSECTION 7 CHECKS, ADJUSTMENTS AND FAULT FINDING7.1 CHECKING APPLIANCE OPERATIONWhen carrying out any repairs or servicing to theapplianc

1LineaThe Linea 7 range is comprised of 3 models of combina-tion boiler – 726, 730, 735 – with outputs to heating &DHW of 26, 30 & 35 kW respe

28LineaIf the temperature continues to rise and exceedsthe set-point by 6oC, the burner will shut downand the boiler will perform a three-minute anti-

29LineaFig. 437.4 COMBUSTION ANALYSIS TESTA combustion analysis check can easily be car-ried out on the appliance via the test points lo-cated on the

30LineaIf so proceed to next stage. If not, see 7.7.4.Connect test leads between the Neutral & Earthconnections at the appliance terminal strip.(

31LineaMAINS ON FANREPLACE FANREPLACEWIRING ORCONNECTIONSMAINS ON PUMPREPLACE PUMPA2AISTHERE 0 VdcBETWEEN TERMINALS M5.5 & M5.6 ON PCBCHECK

32LineaCHECK WIRING ANDCONNECTIONS,HIGH LIMITTHERMOSTAT ORPCBISTHERE 24 Vdc BETWEEN TERMINALSM5.3 AND M3.3 ON PCBISTHERE 24 Vdc BETWEEN TERMINALSM5.

33LineaA2REPLACECONTROLBOARDFUSE OKCHECK FUSESF1 AND F2 ONCONNECTIONBOARDRECHECK SUPPLY FUSE& CONNECTORS TOBOILER TERMINALSISRED LEDFLASHINGREPLAC

34LineaDOES BURNER LIGHT CHECK BOILERSTARTUP: TEST ATURN ON TAP TURN MODESELECTOR SWITCH TODHW.DHW STAT AT MAX.STARTTEST B : CHECK CONTROL IN

35Linea CHECK BOILERSTARTUPTEST ADOES BURNER LIGHTMAKE A LINKBETWEEN PIN M16.TAAND M16.TA ONCONTROL BOARD SWITCH ON BOILERAND SELECT MODETO WINTER

36Linea0 VDC ON BOILERFLOW SWITCHCHECK WATERFLOWSWITCHOKISTHERE A VOLTAGE > 0.5 VdcBETWEEN TERMINALSM3.11 & M3.10 ON PCBIS THERE 0 VdcBETWEE

37LineaA4REPLACECONTROL BOARDREPLACECONTROL BOARDCHECK DHWNTC SENSOR ORCONNECTIONFAULT CODESHOWING 03CHECK FLOWNTC SENSOR ORCONNECTIONDOTHE BOILER FLO

2Linea1.1 PRINCIPLE COMPONENTS●●●●● A fully integrated electronic control board fea-turing electronic temperature control, anti-cy-cle control, pump o

38LineaREPLACECONTROLBOARDREMOVEJUMPERIS TIMER JUMPERON JP9WAIT 3 MIN.RESTARTTHE TESTDO BURNER AND FANSWITCH ONISWATER FLOWTEMPERATURE >80 ûCWAIT

39LineaSECTION 8 WIRING DIAGRAMS8.1 EXTERNAL WIRINGThe appliance comes with a factory fitted link toallow basic operation of the boiler via the modese

40LineaAppliance wired to basic voltage-free time clockFig. 46Basic wiring with link between TA & TA (no controls fitted)Appliance wired to progra

41LineaFUNCTIONAL DIAGRAMNOTE: L-N-E CONNECTION IS ADVISABLECONTROL SWITCHING OF TIME CLOCK AND ROOM THERMOSTAT IS 230 V.a.c.R.T. Room thermostatTS H

42LineaNOTE: L-N-E CONNECTION IS ADVISABLECONTROL SWITCHING OF TIME CLOCK AND ROOM THERMOSTAT IS 230 V.a.c.WIRING DIAGRAMLinea 726Linea 730Linea 735

43LineaSECTION 9 EXPLODED DIAGRAMS9063116171820483826394012495043513262122263621915352400401402 POS. DESCRIPTION 726 730 7351 Frame R01005133 R010051

44Linea242012640720120124202285222773134129219372482003533663533663513283513283513283652827646135303462 24Spare10172021619181511400401

45Linea POS. DESCRIPTION 726 730 7351 Domestic water heat exchanger R8037 R1957 R100246272 Connection R9807 R9807 R98073 Pressure switch R2044 R2044

46Linea122012342902820028882022882852842009287720061020011572006735 POS. DESCRIPTION 726 730 7351 Expansion vessel R2204 R2204 R25732 Flexible pipe R

47Linea11718194512200200141593513283321621222134004011310217356735217 POS. DESCRIPTION 726 730 7351 Air box bottom R10023095 R10022388 R100247922 Amb

3LineaSECTION 2 TECHNICAL DATA2.1 Central heating 726 730 735Heat input (kW) 28.2 32.6 37.8Maximum heat output (kW) 26.0 30.1 35.2Minimum heat output

48Linea2320191716121012342123295257300301 POS. DESCRIPTION 726 730 7351 Combustion chamber assembly R6027 R6028 R100247512 Combustion chamber back pa

49LineaSECTION 10 LPG INSTRUCTIONS10.1 RELATED DOCUMENTS BS 6798 INSTALLATION OF BOILERS OF RATED NOT EXCEEDING 60kW BS 5449 PART 1 FORCED CIRCULAT

Cod. 10024467 - 49/03 - Ed. 3Vokèra Ltd.4th Floor, Catherine House, Boundary Way, Hemel Hempstead, Herts, HP2 7RPEmail: [email protected] Web: ww

4Linea2.11 PUMP DUTYFig. 3 shows the flow-rate available – af-ter allowing for pressure loss through theappliance – for system requirements.When using

5LineaSECTION 3 GENERAL REQUIREMENTS (UK)This appliance must be installed by a competentperson in accordance with the Gas Safety (In-stallation &

6Linea3.6 WATER CIRCULATIONDetailed recommendations are given in BS 5449Part 1 and BS 6798. The following notes are forgeneral guidance only.3.6.1 PIP

7Linea3.10 TIMBER FRAMED BUILDINGSIf the appliance is to be fitted in a timber framedbuilding, it should be fitted in accordance with theInstitute of