Main Combi 24 HE Manuel de service

Installation & Service InstructionsCombi 24 HEThis is a Wall Mounted Powered Flue Condensing Combination Boiler Gas FiredCentral Heating Unit.The

6.0 SYSTEM DETAILS106.1 Information1. The Main Combi 24 HE Condensing CombinationBoiler is a ‘Water Byelaws Scheme - ApprovedProduct’. To comply with

116.0 SYSTEM DETAILS6.5 System Filling and Pressurising1. A filling point connection on the central heatingreturn pipework must be provided to facilit

6.0 SYSTEM DETAILS126.8 Domestic Hot Water Circuit1. All DHW circuits, connections, fittings, etc. shouldbe fully in accordance with relevant standard

137.0 SITE REQUIREMENTS7.1 Location1. The boiler may be fitted to any suitable wall withthe flue passing through an outside wall or roof anddischargin

7.0 SITE REQUIREMENTS147.3 Ventilation of Compartments1. Where the appliance is installed in a cupboard orcompartment, no air vents are required.2. BS

157.0 SITE REQUIREMENTS7.6 Condensate DrainFAILURE TO INSTALL THE CONDENSATE DISCHARGEPIPEWORK CORRECTLY WILL AFFECT THE RELIABLEOPERATION OF THE BOIL

7.0 SITE REQUIREMENTS167.7 FlueNOTE: Due to the nature of the boiler a plume ofwater vapour will be discharged from the flue. Thisshould be taken into

177.0 SITE REQUIREMENTSFig. 17Fig. 167.8 Flue DimensionsThe standard horizontal flue kit allows for flue lengthsbetween 100mm and 685mm from elbow to

7.0 SITE REQUIREMENTS187.11 Flue Options1. The Main Combi 24 HE can be fitted with fluesystems as illustrated. 2. The standard flue is suitable only f

198.0 INSTALLATION8.1 Initial PreparationThe gas supply, gas type and pressure must bechecked for suitability before connection (seeSection 7.4).1. Af

2Building Regulations and the BenchmarkCommissioning ChecklistBuilding Regulations (England & Wales) requirenotification of the installation of a

8.0 INSTALLATION208.4 Fitting The Boiler1. Lift the boiler using the lower edges. Engage theslots at the top rear of the boiler on the wall platehooks

218.0 INSTALLATION8.6 Condensate Drain (see section 7.6)1. Connect the condensate drain using the 1” BSPnut and seal supplied.Ensure the discharge of

8.0 INSTALLATION228.7 Fitting the Flue (Cont)5. Mark dimension ‘Y’ on the flue as shown (Fig. 26).Carefully cut the waste material from the flue,ensur

238.0 INSTALLATIONL230 VSelector / Reset SwitchExternalControlsNbr bPumpHydraulic Differential Pressure SwitchrrDHW Flow Priority MicroswitchggSafety

9.0 COMMISSIONING249.1 Commissioning the Boiler1. Reference should be made to BS 5449 Section 5when commissioning the boiler. 2. Open the mains water

259.0 COMMISSIONING9.2 Checking the Burner Pressure1. Turn on the gas and electrical supplies to the boilerand ensure that all external controls are c

10.0 COMPLETION2610.1 Completion1. Hinge the facia panel upwards and engage thesecuring screws. Refit the case front panel andtighten the screws (Fig.

2711.0 SERVICING THE BOILER11 .1 Annual Servicing1. For reasons of safety and economy, it isrecommended that the boiler is serviced annually.Servicing

11.0 SERVICING THE BOILER2811.1 Annual Servicing (Cont)10. Ease the front edge of the left hand baffleupwards, disengaging the spring clip. Disengage

2912.0 CHANGING COMPONENTSIMPORTANT: When changing components ensurethat both the gas and electrical supplies to theboiler are isolated before any wor

3INSTALLER NOTIFICATION GUIDELINESChoose BuildingRegulations NotificationRouteContact your relevant LocalAuthority Building Control(LABC) who will arr

12.0 CHANGING COMPONENTS3012.3 Heat Exchanger (Fig. 52)1. Remove the fan as described in section 12.1.2. Drain the primary circuit. Prise the pipeconn

3112.0 CHANGING COMPONENTS12.5 Injectors (Fig. 54)1. Remove the burner as described in Section 12.4.2. Undo the screws securing the injector manifold

12.0 CHANGING COMPONENTS3212.8 Gas Valve (Fig. 56)1. Undo the nut on the gas feed pipe at the tap railunder the boiler.2. Completely undo the securing

3312.0 CHANGING COMPONENTS12.11 Pump - Head Only (Figs. 58 & 59)1. Drain the primary circuit and remove the sockethead screws securing the pump he

12.0 CHANGING COMPONENTS3412.14 Pressure Gauge (Figs. 61 & 62)1. Drain the primary circuit and undo the nut on thepressure gauge capillary.2. Remo

3512.0 CHANGING COMPONENTS12.17 Pressure Relief Valve (Fig. 65)1. Drain the primary circuit.2. Disconnect the discharge pipe from the valve.Using a su

12.0 CHANGING COMPONENTS3612.20 Plate Heat Exchanger (Fig. 68)1. Drain the primary circuit.2. While supporting the heat exchanger undo thescrews secur

3712.0 CHANGING COMPONENTS12.21 Diverter Valve Assembly (Cont)CH Pressure Differential Valve (Fig. 71)1. Remove the DHW pressure differential valve as

12.0 CHANGING COMPONENTS3812.23 Secondary Heat Exchanger (Fig. 73)1. Drain the primary circuit2. Undo the four screws securing the right handcase pane

3913.0 ELECTRICALOptional TimersPumpGas ValveAir PressureSwitchSafety ThermostatPressure SwitchHydraulic DifferentialTemperature SensorSelector Switch

LEGISLATION4Codes of Practice, most recent version shouldbe usedIMPORTANT - Installation, Commissioning, Service & RepairThis appliance must be in

14.0 SHORT PARTS LIST40Short Parts ListKey G.C. Description ManufacturersNo. No. Part No.22 Fan 511262723 Pressure Switch 511299932 Heat

4115.0 FAULT FINDINGCarry out initial fault finding checks1. Check that gas, water and electrical supplies are available at the boiler. Electrical sup

15.0 FAULT FINDING42Domestic Hot Water - Follow operational sequenceTurn selector to neon illuminatedPrimary flow switchoperatedFan runs at max sp

4315.0 FAULT FINDINGFault Finding Solutions Sections A to EIs there 230V at:Is there 230V at:Main terminals L and N Check electrical supply1.NOMain te

15.0 FAULT FINDING44Check and correct if necessary1. Electrical and pressure tube connections2. Blockage of pressure tubes3. Restriction in flue4. Ven

4515.0 FAULT FINDINGCheck and correct if necessary1. Flame sensing electrode and lead connections2. Electrode positionFlame current should be 1 µA app

CONTROLS To comply with the Building Regulations, each section must have a tick in one or other of the boxesTIME & TEMPERATURE CONTROL TO HEATING

SERVICE 1DATEENGINEER NAMECOMPANY NAMETEL No.CORGI ID CARD SERIAL No.COMMENTSSIGNATURESERVICE 2DATEENGINEER NAMECOMPANY NAMETEL No.CORGI ID CARD SERIA

Publication No. 5115809 - Iss. 4 (04/2006)All descriptions and illustrations provided in this leaflet have beencarefully prepared but we reserve the r

User’s Guide andImportant Warranty InformationCombi 24 HEThis is a Wall Mounted Powered Flue Condensing Combination Boiler Gas FiredCentral Heating Un

51.0 INTRODUCTION1.1 Description1. The Main Combi 24 HE is a fully automatic gasfired wall mounted condensing combination boiler. Itis room sealed and

2Where fitted, user label foroptional timer to be applied here.Dear UserThank you for choosing a Main Combination boiler. The followinginstructions ar

3Operating the BoilerThe Central Heating and Hot Water you need willbe available when the gas and electricity suppliesto the boiler are turned on with

4Fault Indication1. Your Main Combi 24 HE has three neonindicators. The upper two function as boiler on andfault indicators.2. Depending on the nature

5Temperature Control1. Central Heating: The central heating hot waterflow temperature can be adjusted between 30° C(± 5° C) minimum and 85° C (± 5° C)

6Central Heating System Pressure1. The water pressure in the central heatingsystem is indicated by the pressure gauge.2. With the system cold and the

7Servicing and Repair of your Boilerheateamcan service and repair your boiler if yourinstaller is not able to.Our Baxi Potterton trained heating exper

8For your SafetyThis appliance must have been installed inaccordance with the manufacturer’s instructions andthe regulations in force.Any modification

921043barResetBurner OnFlame FailurePower On200mm Min780mm450mm200mm Min20mm/5mm Minsee *NOTE:5mm Min8mm Min450mm MinFor ServicingPurposesFig. 13Fig.

10No Heating/Hot WaterUser to checkfault diagnosisContact your installerInstaller unableto rectify faultContact heateamImportant informationyou need t

11If you smell gasTurn off the gas supply at the meter and call yourgas supplier immediately. It is possible to isolate theboiler and at the isolating

2.0 GENERAL LAYOUT62.1 Layout1. Air Pressure Switch2. Expansion Vessel3. Burner Manifold4. Automatic Air Vent5. DHW Plate Heat Exchanger6. Circulation

BAXI POTTERTONA Trading Division of Baxi Heating UK LtdBrownedge Road Bamber Bridge Preston Lancashire PR5 6UPAfter Sales Service 08701 655 644 Techni

73.0 APPLIANCE OPERATIONNOTE: All delay timers mentioned in 3.1 and 3.2are overridden by domestic hot water demand.3.1 Central Heating Mode (Fig. 4)1.

4.0 TECHNICAL DATA80200 400 600 800 1000 12000.511.522.533.54Metre (wg)Flow Rate (l/h)Pump - Available Head054.5TemperaturesC.H. Flow Temp (adjustab

95.0 DIMENSIONS AND FIXINGSDimensionsA 780mmB 345mmC 450mmD 116mm Ø Min.E 185mmF 190mmG 131mm65mm 65mm 65mm 65mmView from under the applianceGas Inlet