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Baxi, Brooks House

Coventry Road, Warwick, CV34 4LL.

Please ensure the boiler is installed in accordance with these

installation instructions and regulations adhered too.

0844 871 1525

Please note calls may be monitored or recorded

For Baxi Customer Support and

Technical Advice,

www.baxi.co.uk

e&oe

All descriptions and illustrations provided in this document have been

carefully prepared but we reserve the right to make changes and

improvements in our products which may affect the accuracy of the

information contained in this leaflet. All goods are sold subject to our

standard Conditions of Sale which are available on request.

7619497 - v.02 - 02092014

7619497

Содержание MainEco Combi 24

Страница 1: ... Checklist and should be left with the user for safe keeping They must be read in conjunction with the Flue Installation Guide United Kingdom en 24 28 35 18 24 Installation and Service Manual Wall Mounted Gas Condensing Boiler Baxi MainEco Combi and System ...

Страница 2: ...ing the product and keep it in a safe place for future reference In order to ensure continued safe and efficient operation we recommend that the product is regularly maintained Our Service and After Sales organization can assist with this We hope you will receive many years of satisfactory service ...

Страница 3: ...4 2 Additional Directives 10 3 Safety instructions and recommendations 11 3 1 Safety instructions 11 3 2 Recommendations 11 4 Technical description 13 4 1 General description 13 4 2 Main parts 13 4 3 Skeleton Diagrams 14 4 4 Operating principle 14 4 4 1 Gas air setting 14 4 4 2 Combustion 15 4 4 3 Heating and domestic hot water production 15 4 4 4 Control system 15 4 4 5 Adjustment 15 4 4 6 Regula...

Страница 4: ...the safety valve discharge pipe 26 5 5 7 Connecting the condensate discharge pipe 26 5 5 8 Automatic air bleed 28 5 6 Gas connection 29 5 7 Connections for the air and exhaust pipes 29 5 7 1 Classification 29 5 7 2 Outlets 30 5 7 3 Lengths of the air flue gas pipes 31 5 7 4 Additional Directives 32 5 7 5 Connection of the combustion gas exhaust pipe 32 5 8 Electrical connections 32 5 8 1 Control u...

Страница 5: ...enance operations 53 8 2 1 Open the boiler 53 8 2 2 Checking the hydraulic pressure 54 8 2 3 Checking the expansion vessel 54 8 2 4 Checking the ionization current 54 8 2 5 Checking the DHW transfer capacity 55 8 2 6 Checking the flue gas discharge and the air supply 55 8 2 7 Checking combustion 55 8 2 8 Checking the automatic air vent 55 8 2 9 Checking the condensate trap 56 8 2 10 Checking the b...

Страница 6: ...and lock outs 63 9 2 1 Blocking 63 9 2 2 Lock out 65 10 Spare parts 70 10 1 General 70 10 2 Spare parts 70 11 Appendix 71 11 1 User instruction card 71 11 2 Gas boiler system commissioning checklist 72 11 3 Service record 73 Contents 02092014 7619497 02 4 ...

Страница 7: ...ormity The device complies with the standard type described in the EG declaration of conformity It was manufactured and commissioned in accordance with European directives The original declaration of conformity is available from the manufacturer ...

Страница 8: ... Building Regulations only relates to dwellings Therefore the checklist only applies if the appliance is being installed in a dwelling or some related structure The flowchart opposite gives guidance for installers on the process necessary to ensure compliance with Building Regulations 1 2 The Benchmark Scheme Benchmark places responsibilities on both manufacturers and installers The purpose is to ...

Страница 9: ...rtificate number issued by the Gas Safe Register is written onto the Benchmark Checklist Scheme Members only Call Gas Safe Register on 0800 408 5577 or log onto www gassaferegister co uk within 10 days If you notify via the Gas Safe Register the register will issue the Building Regulations certificate on members behalf Complete the Benchmark Checklist Install and Commission this appliance to manuf...

Страница 10: ...ls important information Signals a referral to other instructions or other pages in the instructions 2 2 Abbreviations 4 LTH Low temperature heating 4 DHW Domestic hot water 4 HRU Heat Recovery Unit 4 PCU Primary Control Unit Electronic system to control burner function 4 SCU Secondary Control Unit Additional electronic system 2 3 General 2 3 1 Manufacturer s liability Our products are manufacture...

Страница 11: ...all the instruction manuals to the user 2 3 3 User s liability To guarantee optimum operation of the appliance the user must respect the following instructions 4 Read and follow the instructions given in the manuals provided with the appliance 4 Call on qualified professionals to carry out installation and initial start up 4 Get your installer to explain your installation to you 4 Ensure the Appli...

Страница 12: ... MainEco System 18 41 470 13 MainEco System 24 41 470 14 2 4 2 Additional Directives Apart from the legal provisions and Directives the additional Directives described in these instructions must also be observed For all provisions and Directives referred to in these instructions it is agreed that all addenda or subsequent provisions will apply at the time of installation 2 Introduction Baxi MainEc...

Страница 13: ...eaks immediately 4 Trace possible leaks and seal them immediately 3 2 Recommendations WARNING 4 Installation and maintenance of the boiler must be carried out by a qualified professional in compliance with prevailing local and national regulations 4 When working on the boiler always disconnect the boiler from the mains and close the main gas inlet valve 4 After maintenance or repair work check all...

Страница 14: ... to the appliance must never be removed or covered and must remain legible during the entire lifespan of the appliance Immediately replace damaged or illegible instructions and warning stickers Modifications Modifications may only be made to the boiler after the written permission of BAXI to do so 3 Safety instructions and recommendations Baxi MainEco Combi and System 24 28 35 18 24 12 02092014 76...

Страница 15: ... 2 Main parts 1 Flue gas outlet Air intake Combustion air flue gas adapter 60 100 2 Casing air box 3 Outlet for measuring combustion gases 4 Ignition ionization electrode 5 Flue gas discharge pipe 6 Gas air system with a fan gas block and automatic burner unit 7 Air intake silencer 8 Plate heat exchanger DHW Only for Combi models 9 Connection box 10 Condensate trap 11 Circulation pump 12 3 way val...

Страница 16: ...s also used as an air box Air is sucked in by the fan and gas injected into the venturi by the fan intake The fan rotation speed is set according to the settings parameters the thermal energy requirement and the temperatures measured by the temperature sensors The gas and air are mixed in the venturi The gas air ratio ensures that the quantities of gas and air are adjusted to each other This provi...

Страница 17: ...on The heating water reheats the domestic water in the plate exchanger In comfort mode if there is no hot water draw off the boiler handles the periodic reheating of the plate exchanger Any limescale particles are kept out of the plate exchanger by a self cleaning water filter self cleans once every 76 hours 4 4 4 Control system Control of the boiler ensures reliable delivery of heat This means th...

Страница 18: ...f a fault the status signal for the B button on the connection box flashes red For more detailed information see chapter Shutdowns and lock outs page 63 4 4 8 Overheat temperature protection The maximum temperature protection locks the boiler if the water temperature becomes too high 110 C In the event of a fault the status signal for the B button on the connection box flashes red For more detaile...

Страница 19: ...7 8 34 9 Factory setting kW 24 0 28 2 34 9 Nominal input Qnw DHW System Hs min max kW 6 2 26 7 6 2 31 3 8 7 38 8 Factory setting kW 26 7 31 3 38 8 Heating efficiency under full load Hi 80 60 C 97 6 97 6 97 2 98 2 97 6 Heating efficiency under full load Hi 50 30 C 104 5 103 3 103 3 104 5 103 3 Heating efficiency under partial load Hi Return temperature 60 C 97 8 97 8 98 4 97 8 97 8 Heating efficien...

Страница 20: ...ter flow Rate 35 C Rise l min 9 8 11 4 14 3 Domestic water resistance without flow restrictor mbar 96 123 215 Flow rate threshold minimum l min 1 2 1 2 1 2 Water content l 0 16 0 16 0 18 Operating pressure Pmw maximum bar 8 8 8 Electrical characteristics Power supply voltage VAC 230 230 230 230 230 Power consumption Full load maximum W 105 117 145 92 103 Power consumption Part load maximum W 82 82...

Страница 21: ...t water supplies for domestic purposes 4 BS EN 12828 Heating systems in buildings 4 BS EN 14336 Installation commissioning of water based heating systems 4 BS 6798 Installation of gas fired hot water boilers 4 BS 5440 Part 1 Flues 4 BS 5440 Part 2 Ventilation 4 BS 7074 Expansion vessels and ancillary equipment for sealed water systems 4 BS 7593 Treatment of water in domestic hot water central heat...

Страница 22: ...fore mounting the boiler decide on the ideal position for mounting bearing the Directives and the dimensions of the appliance in mind 4 Ensure that there is sufficient space under the boiler to fit and remove the condensate trap and the connection box 4 To ensure adequate accessibility to the appliance and facilitate maintenance leave enough space around the boiler 4 Mount the boiler onto a flat s...

Страница 23: ...the boiler even temporarily CAUTION 4 The boiler must be installed in a frost free environment 4 An earthed electrical connection must be available close to the boiler 4 A connection to the mains drainage system for the discharge of condensate must be available close to the boiler n Safety rating Z Zones OZ Breakdown of the exterior zone B Bathtub or shower tray For safety rating IP X4D installati...

Страница 24: ...ed adapter Heating circuit flow G Pipe diameter Ø 22 mm y Domestic hot water outlet G Pipe diameter Ø 15 mm Gas Gaz Gas connection G Pipe diameter Ø 22 mm x Domestic cold water inlet G Pipe diameter Ø 15 mm z Heating circuit return G Pipe diameter Ø 22 mm 1 Clearance when operating 5 mm R000699 B 368 184 364 243 541 209 230 664 151 35 52 1 2 3 4 1 117 2 184 3 251 4 316 46 90 187 76 5 1 5 Installat...

Страница 25: ... points for the air supply and the combustion gas exhaust to protect the boiler and its connections from dust Only remove this protection at the time when these connections are made 1 Determine the position of the two fixing holes Make sure that the holes are level Drill 2 holes with a Ø of 8 mm 2 Insert the rawplugs with a Ø of 8 mm Secure with Ø 6 mm bolts and corresponding washers 3 Mount the b...

Страница 26: ... which the flow temperature increases In this way the boiler does not require a minimum water flow rate If using a heating and domestic hot water production type boiler on an installation in which the flow can be fully disconnected from the return e g by using thermostatic valves you should either fit a bypass or fit an expansion vessel to the heating flow conduit 5 5 3 Connection of the heating c...

Страница 27: ...ection instructions 5 5 5 Connecting the expansion vessel The boiler is fitted as standard with an 8 litre expansion vessel If the water volume is greater than 100 litres or the static height of the system exceeds 5 metres an additional expansion vessel must be fitted Refer to the table below to determine the expansion vessel required for the installation Conditions of validity of the table 4 3 ba...

Страница 28: ...th water before starting the boiler to avoid combustion products escaping from the boiler 2 Press the condensate trap firmly into the j opening provided for it underneath the boiler The condensate trap must click into place CAUTION Check whether the condensate trap is solidly fitted in the boiler 3 Insert the flexible drain hose from the condensate trap into a drain pipe 4 Mount a trap or a siphon...

Страница 29: ...recommended to connect upstream of the sink or other waste water receptacle Termination to a drain or gully 1 Set the discharge pipe at a gradient of at least 50 mm per metre maximum horizontal length 5 metres 2 Pipe must terminate above water level but below surrounding surface Cut end at 45 Termination to a purpose made soakaway 1 Set the discharge pipe at a gradient of at least 50 mm per metre ...

Страница 30: ...lly with extended external run trace heating 1 Set the discharge pipe at a gradient of at least 50 mm per metre maximum horizontal length 5 metres 2 Pipe must terminate above water level but below surrounding surface Cut end at 45 The Trace Heating element must be installed in accordance with the instructions supplied External runs those in unheated locations still require insulation 5 5 8 Automat...

Страница 31: ...and exhaust pipes Only use approved flue gas discharge and air supply materials supplied by BAXI For more detailed information see Flue Accessories Fitting Guide 5 7 1 Classification The table specifies this classification in detail according to Type Execution Description C13 Room sealed 4 Vent in the outside wall 4 The opening for the air supply inlet is located in the same pressure zone as the v...

Страница 32: ...evel 300 mm J From a surface or boundary line facing a terminal 600 mm K From a terminal facing a terminal Horizontal flue From a terminal facing a terminal Vertical flue 1200 mm 600 mm L From an opening in carport e g door window into the dwelling 1200 mm M Vertically from a terminal on the same wall 1500 mm N Horizontally from a terminal on the same wall 300 mm R From adjacent wall to flue verti...

Страница 33: ...is possible to apply an extra 10 times 45 or 5 times 90 elbows Eccentric An 80 80 mm flue gas adapter accessory must be fitted for this connection If using a room sealed version it is necessary to connect both the combustion gas exhaust and the air supply opening parallel The pipes must be run in parallel and terminate in the same pressure zone using the concentric vertical terminal Maximum chimne...

Страница 34: ...ke in account the insertion depth of 30 mm when measuring the length of pipe prior to cutting 4 The pipes must allow no leakage of flue gases and be resistant to corrosion 4 Connect the pipes together without stress between the sections 4 The horizontal sections need to be constructed with a gradient of 50 mm per metre Back to the boiler 5 8 Electrical connections 5 8 1 Control unit The boiler is ...

Страница 35: ...ch must be easily accessible 5 8 2 Recommendations WARNING 4 Only qualified professionals may carry out electrical connections always with the power off 4 The boiler is entirely pre wired Do not modify the connections inside the control panel 4 Earth the appliance before making any electrical connections Make the electrical connections of the boiler according to 4 The instructions of the prevailin...

Страница 36: ...properly 7 Slide the User instruction card supplied into the guides underneath the connection box 8 Slide the connection box into the guides underneath the boiler once all the connections have been made 9 Secure the connection box using the screw found in the guides The connection box can also be attached to the wall using the screw holes on the back of the connection box The connection box should...

Страница 37: ... outside temperature sensor An outside sensor can be connected to the Tout terminals of the connector In the case of an on off thermostat the boiler will control the temperature with the set point from the internal heating curve CAUTION Check whether the outside sensor is suitable for this boiler A suitable outside sensor can be obtained as an accessory A OpenTherm controller can also use this out...

Страница 38: ...side temperature higher than 10 C can be set with parameter p30 the circulation pump continues to run and then switches off This is only possible with an iSense or qSense n Operation signal and failure signal Status The alarm or operation signal is selected using parameter p40 4 If the boiler is operating the operation signal can be switched via a potential free contact maximum 230 VAC 1 A on the ...

Страница 39: ... and control the heating domestic hot water function once a 10 230 V signal has been connected to the connectors If the power to the boiler is interrupted the status of the CH and DHW input will be reset to the factory setting enabled Check whether this is the status required n Connecting control panel The control panel for the boiler is connected to connector BUS HMI See chapter Access to the con...

Страница 40: ...pply FS Flow switch HMI Connection box 5 10 Filling the system 5 10 1 Water treatment WARNING Do not add chemical products to the central heating water without consulting BAXI For example antifreeze water softeners and or products to increase or reduce the pH value These may cause faults in the boiler and damage the heat exchanger Flush the central heating installation with at least 3x the volume ...

Страница 41: ...rnox 4 Sentinel Performance Solution Ltd 5 10 2 Filling the condensate trap Check whether the condensate trap is filled up to the mark If the condensate trap has to be topped up proceed as follows CAUTION First remove the front housing of the boiler so that you can disconnect the condensate trap See paragraph Open the boiler page 53 1 Move the lever underneath the hydroblock to the right to discon...

Страница 42: ...on the boiler always runs through an automatic venting programme lasting approx 4 minutes During filling air can escape from the system via the automatic air vent If necessary top up the water level in the heating system recommended hydraulic pressure between 1 and 2 bar CAUTION When venting ensure that no water enters or makes contact with the casing and electrical parts of the boiler 1 2 3 4 T00...

Страница 43: ...eed key provided whilst keeping a rag pressed against the bleed connection CAUTION The water may still be hot 8 Wait until water comes out of the bleed valve and then close the bleed connection 9 Turn the boiler on A vent cycle of a duration of around 4 minutes is carried out automatically 10 After venting check whether the pressure in the installation is still sufficient If the water pressure is ...

Страница 44: ...al for the B button can flash in a range of colours and at different frequencies The meaning of these signals can be found in the User instruction card supplied with the boiler See also User instruction card page 71 CAUTION The instruction card must be slid underneath the connection box after the boiler installation or use of the card The instrument panel for the connection box also has 2 rotary k...

Страница 45: ...it 4 Use the pressure gauge to check the water pressure in the heating system The hydraulic pressure must reach a minimum of 0 8 bar If necessary top up the water level in the heating system recommended hydraulic pressure between 1 and 2 bar 4 Check the condensate discharge trap it must be filled with clean water up to the mark 4 Check that there are no leaks on the hydraulic connections 6 2 3 Ele...

Страница 46: ...he gas block in the boiler for tightness The current operating condition of the boiler is shown by the status signal on the instrument panel The status signal for the B button can flash in a range of colours and at different frequencies The meaning of these signals can be found in the User instruction card supplied with the boiler See also User instruction card page 71 Error codes page 63 Error du...

Страница 47: ...ust be the same as the one shown on the rating plate See the diagram for the position of measuring point C for the inlet gas pressure 6 Purge the gas supply pipe by unscrewing the screw from the measure point C Tighten the measurement point when the pipe has been sufficiently purged 7 Check the leak tightness of the gas pipe including the gas block 6 4 2 Checking combustion 1 Unscrew the plug of t...

Страница 48: ...oved Full load CO2 must be between 9 15 and 9 50 n Set the boiler to part load 1 Continue pressing for around 3 seconds on the B key The status signal for the B button is orange and always flashes green briefly Part load is set 2 Measure the percentage CO2 in the flue gases Front panel removed Part load CO2 must be between 8 70 and 9 05 WARNING There MUST remain a gap between the full load and par...

Страница 49: ...n to stabilise Do not insert probe to avoid flooding the analyser Verify Integrity of Seals Check all burner seals internal flue seals door case seals Replace any seals that appear unsound Is CO 350ppm and CO CO2 ratio 0 004 Yes No Check CO Combustion Ratio at Maximum Rate Whilst the boiler is still operating at maximum insert the analyser probe into the flue gas test point allowing the reading to...

Страница 50: ...atus can only be reached via the part load status 4 See drawing for the position of control screw A for full load 3 Set the percentage CO2 for the gas type being used to the nominal value This should always be inside the highest and lowest setting limit 4 If the percentage CO2 is too low turn the screw A anticlockwise for a higher percentage 4 If the percentage CO2 is too high turn the screw A clo...

Страница 51: ...s sampling plug back in place 3 Refit the front panel 4 Raise the temperature in the heating system to approximately 70 C 5 Shut down the boiler 6 After about 10 minutes vent the air in the heating system 7 Switch on the boiler 8 Check the tightness of the flue gases evacuation and air inlet connections 9 Checking the hydraulic pressure If necessary top up the water level in the heating system rec...

Страница 52: ...culation Do not modify x10 seconds 35 35 35 35 35 p25 Heat curve set point Maximum outside temperature 0 to 30 C Only with an outside temperature sensor 20 20 20 20 20 p26 Heat curve set point Flow temperature 0 to 90 C Only with an outside temperature sensor 20 20 20 20 20 p27 Heat curve set point Minimum outside temperature 30 to 0 C Only with an outside temperature sensor 15 15 15 15 15 p28 Min...

Страница 53: ...d 0 0 0 0 0 p39 Flue gas damper running time 0 to 255 seconds 0 0 0 0 0 p40 Fault relay function 0 Operation signal 1 Alarm signal 2 External 3 way valve 2 2 2 2 2 p41 Maintenance message Do not modify 0 0 0 0 0 p42 Service operating hours Do not modify 175 175 175 175 175 p43 Service burning hours Do not modify 30 30 30 30 30 p44 Venting cycle 0 Stop 1 Multiple speed pump 2 Modulating pump 1 1 1 ...

Страница 54: ...s page 34 CAUTION 4 The antifreeze protection does not function if the boiler is switched off 4 The integrated protection system only protects the boiler not the installation 4 Open the valves on all radiators connected to the heating system 4 If the boiler has been placed in a room at risk of frost the condensate drain and condensate trap should preferably be protected against freezing with a fro...

Страница 55: ...ions WARNING Ensure that the boiler is switched off Electrical isolation can be checked at the electrical test point CAUTION 4 Always examine any seals or gaskets replacing where necessary Where a seal or gasket is supplied with a spare part it should be used irrespective of the condition of the original 4 Use only original spare parts that are intended for use with this type of boiler 8 2 1 Open ...

Страница 56: ...d 2 bar 2 Check the tightness of the water connections 3 Turn the boiler on 8 2 3 Checking the expansion vessel Check the expansion vessel and replace it if necessary Initial pressure of the expansion vessel is 1 0 bar 0 2 8 2 4 Checking the ionization current Check the ionization current at full load and low load The value is stable after 1 minute If the value lies below 3 µA replace the ignition...

Страница 57: ...ombustion analyser probe into the measurement opening This will prevent saturation of the analyser 2 Unscrew the plug of the flue gas measurement point 3 Insert the probe for the flue gas analyser into the measurement opening 4 Measure the percentage CO2 in the flue gases Perform measurements at full capacity and low capacity Compare this with the control value For further information See chapter ...

Страница 58: ...ensate trap and clean it 3 Replace the seal ring for the condensate trap 4 Fill the condensate trap with water up to the mark 5 Press the condensate trap firmly into the j opening provided for it underneath the boiler The condensate trap must click into place 6 Check whether the condensate trap is solidly fitted in the boiler R000431 B 6 5 2 4 3 1 8 Checking and maintenance Baxi MainEco Combi and ...

Страница 59: ...en forwards 10 Tilt the burner and remove it along with the heat exchanger gasket 11 Use a vacuum cleaner fitted with a special endpiece accessory to clean the top part of the heat exchanger combustion chamber 12 Thoroughly clean with the vacuum cleaner again without the top cleaning brush on the endpiece 13 Check using a mirror for example whether any dust can still be seen If so hoover it up 14 ...

Страница 60: ...have revealed the necessity to carry out additional maintenance work proceed as follows depending on the nature of the work 8 3 1 Replacing the ionization ignition electrode Replace the ionization ignition electrode in the following cases 4 Ionization current 3 µA 4 Electrode worn 1 Open the protective cover for the fan at the top 2 Remove the ignition electrode plugs from the PCB 3 Unscrew the 2 ...

Страница 61: ...lip that holds the 3 way valve 6 Dismantle the 3 way valve by rotating a screwdriver 7 Remove the 3 way valve 8 To re assemble perform the above actions in reverse order CAUTION Be careful of the positioning cams on the 3 way valve 8 3 3 Cleaning the plate heat exchanger Depending on the water quality and the operating mode limescale deposits may form in the plate exchanger As a general rule a per...

Страница 62: ...tric acid pH 3 To do this a specific cleaning appliance is available as an accessory After cleaning rinse thoroughly under running water 8 3 4 Cleaning the domestic water cartridge The plate heat exchanger should be removed in order to clean the tap water cartridge Then proceed as follows 1 Dismantle the domestic water cartridge by rotating a screwdriver 2 Remove the domestic water cartridge 3 Cle...

Страница 63: ...while disconnecting the expansion vessel 2 Move the expansion vessel slightly upwards and lift the vessel from the mounting bracket 3 Tip the expansion vessel forwards and allow it drop slightly 4 Carefully lift the expansion vessel out of the boiler 5 Replace the defective expansion vessel 6 To re assemble perform the above actions in reverse order CAUTION 4 Replace all removed gaskets 4 Fill the...

Страница 64: ...s Check for any water leaks 5 Check the seals on the gas and water connections 6 Switch the boiler back on 7 Check the setting of the gas air ratio and if necessary correct it See chapter Checking combustion page 45 See chapter Setting the air gas ratio page 48 8 Checking and maintenance Baxi MainEco Combi and System 24 28 35 18 24 62 02092014 7619497 02 ...

Страница 65: ...supplied with the boiler See also User instruction card page 71 CAUTION The instruction card must be slid underneath the connection box after the boiler installation or use of the card 9 2 Shutdowns and lock outs 9 2 1 Blocking A temporary blocking mode is a boiler operating function caused by an unusual situation The boiler control will try to re start several times The boiler will start up again...

Страница 66: ...eat demand 5v 2 Maximum increase of the flow temperature has been exceeded 4 Non existent or insufficient circulation 4 Sensor error 4 Check the circulation direction pump valves 4 Check the water pressure 4 Check that the sensors are operating correctly 4 Check that the sensor has been correctly fitted 4 Check the cleanliness of the heat exchanger 5v 7 Maximum difference between the flow and retu...

Страница 67: ...iour 5v 21 Communication fault 4 Internal fault in gas air unit 4 Replace the gas air unit 5v 22 No flame during operation 4 No ionization current 4 Purge the gas supply to remove air 4 Check that the gas valve is fully opened 4 Check the supply pressure 4 Check the operation and setting of the gas valve unit 4 Check that the air inlet and flue gas discharge flues are not blocked 4 Check that ther...

Страница 68: ...leanliness of the heat exchanger 4 Check the circulation direction pump valves 4 Replace the sensor if necessary Error code 2 2 times red signal Maximum temperature of heat exchanger or control unit exceeded 4 Non existent or insufficient circulation 4 Sensor not or badly connected 4 Bad connection 4 Sensor fault 4 No air supply or insufficient air supply 4 No flue gas flow or insufficient flue ga...

Страница 69: ...heck that the sensor has been correctly fitted 4 Replace the sensor if necessary e 04 e 05 Flow temperature too low Flow temperature too high 4 No circulation 4 Bad connection 4 Sensor not or badly connected 4 Sensor fault 4 Vent the air in the heating system 4 Check the water pressure 4 Check the wiring 4 Check the circulation direction pump valves 4 Check the cleanliness of the heat exchanger 4 ...

Страница 70: ... Check the condition of the burner set 4 Check the earthing 4 Defective gas air unit 4 Ignition arc but no flame formation 4 Check that the gas valve is fully opened 4 Check the supply pressure 4 Purge the gas supply to remove air 4 Check the operation and setting of the gas valve unit 4 Check that the air inlet and flue gas discharge flues are not blocked 4 Check the wiring on the gas valve unit ...

Страница 71: ...lation of flue gases e 37 Communication fault 4 Internal fault in gas air unit 4 Replace the gas air unit e 38 Communication error with the SCU PCB 4 Bad connection 4 Defective SCU PCB 4 Check the wiring 4 Replace SCU PCB e 39 Shutdown input in locked out mode 4 External cause 4 Bad connection 4 Parameter incorrectly set 4 Suppress the external cause 4 Check the wiring 4 Check the parameters e 40 ...

Страница 72: ...7616301 Sensor Kit 7216300 Airvent inc Clip 7216299 Electrode Set Inc Screw Gasket 7216613 Pressure Gauge 7216292 Combustion Control Unit 7618106 Control Fan Assy 7618108 Gas Valve Outlet Assy 7216603 Pump inc Seal 24 28 kW Combi 18 24 kW System 7216604 Pump inc Seal 35 kW Combi 7216602 User Interaction Controller Combi 7622585 User Interaction Controller System 7601283 Hydraulic Group 24 Kw Combi...

Страница 73: ...Parameter error Miscellaneous Repair Flashing red signal Sensor error Overheat temperature protection Ignition fault Fan fault Parameter error Miscellaneous Reinitialisation Resetting Chimney sweeping position Intermittent orange signal Part load Full load Central heating heat Full load Hot tap water PC programming mode _________________________________ _________________________________ 1 This fun...

Страница 74: ...r p le room thermostat Load weather m u m i t p O n o i t a s n e p m o c start control Time and temperature control to hot water Cylinder thermostat and n o i t a n i b m o C r e m i t r e m m a r g o r p Boiler Heating zone valves t o N d e t t i F required Hot water zone valves t o N d e t t i F required Thermostatic radiator val t o N d e t t i F s e v required Automatic bypass to t o N d e t ...

Страница 75: ...O ppm AND CO At min rate Where Possible CO ppm AND CO Comments Signature SERVICE 02 Date Engineer name Company name Telephone No Gas safe register No Record At max rate CO ppm AND CO At min rate Where Possible CO ppm AND CO Comments Signature SERVICE 03 Date Engineer name Company name Telephone No Gas safe register No Record At max rate CO ppm AND CO At min rate Where Possible CO ppm AND CO Commen...

Страница 76: ... ppm AND CO Comments Signature SERVICE 08 Date Engineer name Company name Telephone No Gas safe register No Record At max rate CO ppm AND CO At min rate Where Possible CO ppm AND CO Comments Signature SERVICE 09 Date Engineer name Company name Telephone No Gas safe register No Record At max rate CO ppm AND CO At min rate Where Possible CO ppm AND CO Comments Signature SERVICE 10 Date Engineer name...

Страница 77: ...Baxi MainEco Combi and System 24 28 35 18 24 11 Appendix 02092014 7619497 02 75 ...

Страница 78: ...11 Appendix Baxi MainEco Combi and System 24 28 35 18 24 76 02092014 7619497 02 ...

Страница 79: ...hnological information contained in these technical instructions as well as any drawings and technical de scriptions supplied remain our property and shall not be multiplied without our prior consent in writing Subject to alterations ...

Страница 80: ...dhered too 0844 871 1525 Please note calls may be monitored or recorded For Baxi Customer Support and Technical Advice contact us at www baxi co uk e oe All descriptions and illustrations provided in this document have been carefully prepared but we reserve the right to make changes and improvements in our products which may affect the accuracy of the information contained in this leaflet All good...

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