Baxi MainEco Combi 35 Manual de Serviço

These instructions include the Benchmark Commissioning Checklist and should be left with the user for safe keeping. They must be read in conjunction w

2 Introduction2.1 Symbols usedIn these instructions, various danger levels are employed to draw theuser’s attention to particular information. In so d

In the interest of customers, we are continuously endeavouring tomake improvements in product quality. All the specifications stated inthis document a

2.4 Homologations2.4.1. CertificationsCE identification noPIN 0063CM3019NOx classification5 (Standards EN)Type of connection (Flue gas outlet) C13, C3

3 Safety instructions andrecommendations3.1 Safety instructionsDANGERIf you smell gas:1. Do not use a naked flame, do not smoke, do notoperate electri

Casing componentsOnly remove the casing for maintenance and repair operations. Putthe casing back in place after maintenance and repair operations.Ins

4 Technical description4.1 General descriptionWall-hung gas condensing boilers4 High efficiency heating.4 Low pollutant emissions.4 Installation and c

4.3 Skeleton DiagramsCombi 24 - 28 - 351Primary heat exchanger2Hydroblock3Plate heat exchanger (DHW)4Safety valve5Heating flow6Domestic hot water outl

4.4.2. CombustionThe burner heats the heating water circulating in the heatexchanger. At a return temperature lower than around 55°C, the fluegases co

4.4.6. Regulation of the water temperatureThe boiler is fitted with an electronic temperature regulator having anoutlet and return temperature probe.

System 18HManometric height central heating circuitQWater flow ( ΔT=20K)System 24HManometric height central heating circuitQWater flow ( ΔT=20K)4.6 Te

Dear customer,Thank you for purchasing this appliance.Please read this manual carefully before using the product and keep it in a safe place for futur

Boiler type MainEco Combi 24 Combi 28 Combi 35 System 18 System 24Flue gas temperature min - max °C 32 - 78 32 - 84 31 - 82 32 - 65 32 - 78Maximum cou

5 Installation5.1 Regulations governing installationWARNINGThe engineer must be Gas Safe registered and have thecorrect ACS qualifications.Codes of Pr

5.2 Choice of the location5.2.1. Type plateThe identification plate on top of the boiler features the boiler serialnumber and important boiler specifi

When choosing the position for mounting the boiler, bearin mind the authorised position of the combustion gasdischarge outlets and the air intake open

5.3 Main dimensionsBoiler Connection kitiConnection of the combustion gas exhaust pipe; Ø 60 mm hConnection of the air intake pipe; Ø 100 mm êSafety v

5.4 Positioning the boilerThe following components are supplied as standard with the boiler:4 Mounting rail and mounting accessories for wall mounting

5.5.1. Flushing the systemInstalling the boiler in new installations (installations less than6 months old)4 Clean the installation with a universal cl

CAUTION4 The heating pipe must be mounted in accordancewith prevailing provisions.4 Carry out any soldering work required at a safedistance from the b

5.5.6. Connecting the safety valve discharge pipe1.Connect the safety valve pipe to the safety valve outlet ê.CAUTION4 Any soldering must be completed

Termination to an internal soil and vent pipe(1)Set the discharge pipe at a gradient of at least 50 mm permetre, maximum horizontal length 5 metres.(2

Contents1.1 Building Regulations and the BenchmarkCommissioning Checklist ...61.2 The Benchmark Scheme ...

Pumped into an internal discharge branch (e.g. sink waste)downstream of the trapABasement or similar (heated).(1)Set the discharge pipe at a gradient

5.6 Gas connection1. Connect the gas inlet pipe GAS / GAZ.The pipe must have a diameter of at least 22 mm.WARNING4 Close the main gas valve before sta

5.7.2. OutletsWhen codes of practice dictate the use of a terminal guarduse a suitable guard of stainless steel construction. Theremust be a clearance

5.7.3. Lengths of the air/flue gas pipesTo define the maximum final length, you must deduct thepipe length in accordance with the reduction table.nRoo

5.7.4. Additional Directives4 Please refer to the manufacturer’s instructions for the material inquestion when installing the flue gas discharge and a

The boiler is fitted with a 3-wire power supply cable (cable length 1,5m) suitable for a 230VAC/50Hz power supply with phase/neutral/earth system. The

5.8.3. Access to the connector block / Boiler HMIThe connection box with instrument panel is supplied separately asstandard with this unit. The connec

Please read in conjunction with separate sheet"Connecting External Controls".nConnecting modulating controller The boiler is fitted with a O

nConnect frost protectionFrost protection in combination with on/off thermostatIf an on/off thermostat is used, it is advisable to protect any roomswh

nConnect on/off contact (Enable)A 10-230 V signal can be connected to the CH and DHW connectorsto switch the production of heating water or sanitary w

4.5 Circulating pump (Available pump head) ...164.6Technical specifications ...175 Installation ...

5.9 Electrical diagramR000291-AP 230V, 50HzL NMAINS1 32BRBLGN/YWPCRS23212121223 1PSUTATRFSHL6 7 8 9 10 11 12 131 2 3 5SENSORSEITITHMIMAINSSENSORSPUMP

Total installed heat output (kW)≤ 7070 - 200 200 - 550 > 550Degree of acidity (waternon-treated)pH 7 - 9 7 - 9 7 - 9 7 - 9Degree of acidity (wat

5.10.3. Filling the systemCAUTION4 Before filling, open the valves on every radiator in theinstallation.4 Ensure that the boiler is switched off.1. Fi

5.10.4. Venting the systemIt is essential that you bleed any air in the calorifier, the conduits orthe taps to prevent the annoying noises likely to b

6 Commissioning6.1 Control panelMainEco Combi 24 - 28 - 351Domestic hot water temperature rotary knob2Heating water temperature rotary knob3Sweep key

6.2 Check points before commissioning6.2.1. Preparing the boiler for commissioningWARNINGDo not put the boiler into operation if the supplied gas isno

CAUTIONOn first firing the boiler, an odour may be present for ashort period.1. Open the main gas supply.2. Open the gas valve on the boiler.3.Turn th

6.4 Gas settingsThe boiler is preset in the factory to operate on natural gasG20.6.4.1. Gas circuitWARNINGEnsure that the boiler is switched off.1. Re

nSet the boiler to full load1. Continue pressing for around 3 seconds on the B key. The statussignal for the B button is orange and always flashes gre

R000715-ATURN APPLIANCE OFF !Call 0844 871 1555 for advice.The appliance MUST NOT be commissioned until all problems are identified and resolved.If co

6 Commissioning ...426.1 Control panel ...

6.4.3. Setting the air/gas ratio1. Unscrew the plug of the flue gas measurement point.2. Insert the probe for the flue gas analyser into the measureme

2. Set the percentage CO2 for the gas type being used inside thehighest and the lowest setting limit, as determined after the fullload setting. (Front

6.6 Parameter descriptionsParameter Description Adjustment rangeFactory settingCombi System24 28 35 18 24p1Flow temperature: TSET20 to 90 °C80 80 80

Parameter Description Adjustment rangeFactory settingCombi System24 28 35 18 24p36Shutdown input function1 = Shutdown without frost-protection2 = Shut

7 Switching off the boiler7.1 Installation shutdownIf the central heating system is not used for a long period, werecommend switching the boiler off.4

8 Checking and maintenance8.1 General instructionsWARNING4 Maintenance operations must be done by a qualifiedengineer.4 An annual inspection is compul

2. Remove the front panel.8.2.2. Checking the hydraulic pressureThe hydraulic pressure must reach a minimum of 0.8 bar. Ifnecessary, top up the water

8.2.5. Checking the DHW transfer capacityIf tap capacity falls significantly (due to insufficient temperature and/or flow rate), clean the plate heat

8.2.9. Checking the condensate trapCAUTIONFirst remove the front housing of the boiler so that you candisconnect the condensate trap.1. Move the lever

8.2.10. Checking the burner and cleaning the heatexchangerCAUTIONAlways examine any seals or gaskets, replacing wherenecessary. Where a seal or gasket

9 Troubleshooting ...639.1 Error codes ...

8.3 Specific maintenance operationsWARNINGEnsure that the boiler is switched off. Electrical isolationcan be checked at the electrical test point.CAUT

8.3.2. Replacing the 3-way valveIf it becomes necessary to replace the 3-way valve, proceed asfollows:1. Close the main water valve.2.Drain the boiler

If descaling of the plate exchanger is necessary, proceed as follows:1. Ensure that the boiler is switched off.2.Close the gas valve of the boiler.3.

The expansion vessel is inside the boiler at the rear. To replace theexpansion vessel, the front section of the boiler should be removedfirst.nRemovin

4. Carefully open the main water valve, fill the installation, vent it and,if need be, top it up with water. The hydraulic pressure must be aminimum o

9 Troubleshooting9.1 Error codesMainEco Combi 24 - 28 - 351Domestic hot water temperature rotary knob2Heating water temperature rotary knob3Sweep key

Status signals Description CodeShutdown code 1(1 times green signal)Temperature protection5v[1 / 5v[2 / 5v[7Shutdown code 2(2 times green signal)Shutd

ShutdowncodeDescription Probable causes Checking / solution5v[13Communication error withthe SCU PCB4 Bad connection with BUS4 SCU PCB missing fromconn

Status signals Description CodeError code 4(4 times red signal)Fan faulte[34Error code 5(5 times red signal)Parameter errore[00 / e[01Error code 6(6 t

Lock out (Status signals)StatussignalsDescription Probable causes Checking / solutionError code 4(4 times redsignal)Fan fault4 External draught over t

02092014 - 7619497-025EC declaration of conformityThe device complies with the standard type described in the EGdeclaration of conformity. It was manu

Lock out (Error code - e[KK)ErrorcodeDescription Probable causes Checking / solutione[10e[11Difference between theflow and returntemperatures too grea

Lock out (Error code - e[KK)ErrorcodeDescription Probable causes Checking / solutione[35Flow and returnreversed4 Bad connection4 Sensor fault4 Sensor

10 Spare parts10.1 GeneralWhen it is observed subsequent to inspection or maintenance workthat a component in the boiler needs to be replaced, use onl

11 Appendix11.1 User instruction cardR000392-AGroup Signal MeaningBoiler in service(Intermittent green signal)Central heating heatHot tap waterMainten

11.2 Gas boiler system commissioning checklistCONDENSING BOILERS ONLYThe condensate drain has been installed in accordance with the manufacturer’s ins

www.centralheating.co.ukwww.centralheating.co.uk*All installations in England and Wales must be to Local Authority Building Control (LABC) either dire

www.centralheating.co.uk*All installations in England and Wales must beto Local Authority Building Control (LABC) either directly or through aCompeten

Baxi MainEco Combi and System 24 - 28 - 35 / 18 - 24 11. Appendix02092014 - 7619497-0275

11. Appendix Baxi MainEco Combi and System 24 - 28 - 35 / 18 - 247602092014 - 7619497-02

© CopyrightAll technical and technological information contained in these technical instructions, as well as any drawings and technical descriptions s

1.1 Building Regulations and the Benchmark Commissioning ChecklistBuilding Regulations (England & Wales) requirenotification of the installation o

Open Monday - Friday, 8am - 6pmWeekends & Bank Holidays, 8.30am - 2pmWe are closed on Christmas Day and New Year’s Day.Please note calls may be mo

1.3 Installer Notification GuidelinesR000696-01Choose BuildingRegulations NotificationRouteContact your relevant LocalAuthority Building Control(LABC)