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Duo-tec Combi installation instructions

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1. For GB IE only Homologations CE Marking EC Declaration of Conformity Baxi Heating UK Limited being the manufacturer distributor within the European Economic Area of the following Baxi Duo tec 24 28 33 40 Combi ErP Baxi Duo tec 28 LPG Combi ErP declare that the above is in conformity with the provisions of the Council Directive 2009 142 EC 92 42 EEC 2004 108 EC 2006 95 EC 2009 125 EC 2010 30 EU and has been subject to the following conformity procedures laid down in Annex 2 Article 3 of 2009 142 EC under the supervision of the British Standards Institution a Notified Body authorized by the United Kingdom Competent Authority and carrying the Notified Body umber 0086 Type test for purpose of Regulation 5 certified by otified Body 0085 Product Production certified by otified Body 0085 amp 0086 For GB IE only Baxi Heating UK Ltd 2015 Legislation This company declare that no substances harmful to health are contained in the appliance or used during appliance manufacture The appliance is suitable only for installation in GB and IE and should be installed in accordance with the rules in force and only used in a suitably ventilated location In GB the installation must be carried out by a Gas Safe Registered Installer It must be carried out in accordance with the relevant requirements of the Gas Safety Installation amp Use Regulations The appropriate Buildin
2. At min rate Where Possible At max rate Record At min rate Where Possible Comments Comments Signature SERVICE 05 SERVICE 06 Engineer name Engineer name Company name Company name Telephone No Telephone No Gas safe register No Gas safe register No At max rate Record At min rate Where Possible At max rate Record At min rate Where Possible Comments Comments SERVICE 07 SERVICE 08 Engineer name Engineer name Company name Company name Telephone No Telephone No Gas safe register No Gas safe register No At max rate Record At min rate Where Possible At max rate Record At min rate Where Possible Comments Comments Signature SERVICE 09 SERVICE 10 Engineer name Engineer name Company name Company name Telephone No Telephone No Gas safe register No Gas safe register No At max rate Record At min rate Where Possible At max rate Record At min rate Where Possible Comments Comments Signature All installations in England and Wales must be notified to Local Authority Building Control LABC either directly or through a H en Zommen Compe
3. Baxi Heating UK Ltd 2015 13 6 0 System Details System Filling and Pressurising A filling point connection on the central heating return pipework must be provided to facilitate initial filling and pressurising and also any subsequent water loss replacement refilling A filling loop amp instructions are provided with the boiler CH 2 The filling method adopted must be in accordance with all Temporary Loop Mains Return relevant water supply regulations and use approved Inlet equipment Fig 4 3 Your attention is drawn to D for GB Guidance G24 2 and recommendation R24 2 of the Water Regulations Guide for IE the current edition of l S 813 Domestic Gas Installations 4 The sealed primary circuits may be filled or replenished by means of a temporary connection between the circuit and a supply pipe provided a Listed double check valve or some other no less effective backflow prevention device is permanently connected at the inlet to the circuit and the temporary connection is removed after use IMPORTANT If the boiler is installed at a high point in the system it is strongly recommended that Automatic Air Filling Loop SE 7 Vent Kit 720004701 is fitted Connections 66 Expansion Vessel Central Heating only The appliance expansion vessel is pre charged to 0 5 bar Therefore the minimum cold fill pressure is 0 5 bar The vessel is suitable for cor
4. bai e wn T H 5 I E E p oOo 5 6 F 6 EE SGS E GF 6 So 2 6 D d O U CU fF OM OT Hae E OU TES LO PH U O Ae Les N N Ei WN M TFT MN s P OO O O A mo TFT KH OO FP HO OW N Om o r o o o oi d cl oi NON 16 14 17 2 Baxi Heating UK Ltd 2015 8 Central Heating Circuit 26 25 24 20 21 X Fig 2 22 Primary Heat Exchanger Burner Ignition Electrodes Flame Sensing Electrode Gas Valve Pump Automatic Air Vent 23 15 aX 17 15 Domestic Hot Water Outlet Plate Heat Exchanger Automatic By pass Flow Sensor with Filter amp Regulator Pressure Relief Valve Boiler Drain Point Heating Return Cold Water Inlet On Off Valve and Filter Gas Inlet 16 Heating Flow 17 Pressure Gauge 18 Water Pressure Sensor 20 Fan 21 Diverter Valve Assembly 22 Diverter Valve Motor 23 Domestic Hot Water Flow Temperature Sensor 24 Safety Thermostat 25 Central Heating Temperature Sensor 26 Expansion Vessel 3 0 Appliance Operation Central Heating Mode Fig 2 With a demand for heating the pump circulates water through the primary circuit 2 Once main bur
5. i G2 From a vertical drain pipe or soil pipe 25 150 vapour will be discharged from the flue This should be H2 From anint mal r extemal comer 25 300 taken into account when siting the flue terminal Above ground roof or balcony level 300 From a surface or boundary line facing a terminal 600 The following guidelines indicate the general requirements K From a terminal facing a terminal Horizontal flue 200 for siting balanced flue terminals For GB recommendations From a terminal facing a terminal Vertical flue 600 are given in BS 5440 Pt For IE recommendations are given L_ From an opening in carport e g door window in the current edition of I S 813 Domestic Gas into the dwelling 200 lion Vertically from a terminal on the same wall 500 Horizontally from a terminalon the sarne wall ae 2 If the terminal discharges onto a pathway or passageway R From adjacent wall to flue vertical only 300 S From an adjacent opening window vertical only 000 check that combustion products will not cause a nuisance T Adjacent to windows or openings on pitched and flat roofs 600 and that the terminal will not obstruct the passageway U Below windows or openings on pitched roofs 2000 3 If a terminal is less than 2 metres above a balcony above In addition the terminal should be no nearer than 150 mm to an opening in the building fabric formed for the purpose of accommodating a built in element such as a window f
6. 9 0 003 0 003 0 003 0 003 0 040 0 040 0 040 0 040 kWh 17391 20870 24348 27826 6 100 5 2 4 8 Ignition burner power consumption Pon S Annual energy consumption Sound power level indoors L Emissions of nitrogen oxides NOx s 50 s s2 5 mown 2 z 2 o S T O O a a NE LE n ES n n P Standby heat loss Pay P N Domestic hot water parameters X X X X 0 186 0 188 0 184 0 197 x Annual electricity consumption AEC 4 Daily fuel consumption Que kWh 23 220 24 307 23 695 23 102 Annual fuel consumption AFC Declared load profile Daily electricity consumption Qelec S N N o N N N N o S 2 2 2 9 9 9 2 o 9 7 7 8 5 5 0 2 2 3 L 4 4 3 9 8 8 1 B HE A O E h es o o es 0 2 6 8 3 0 0 L 1 4 18 es o o o es 4 D 2 6 8 5 3 3 L 1 1 18 es o o o es 8 2 2 2 LR 8 2 0 L 0 3 18 kW kW kW Vo Vo Yo kW kW kW kW kW GJ kWh kWh Vo kWh GJ 1 Low temperature means for condensing boilers 30 C for low temperature boilers 37 C and for other heaters 50 C return temperature at heater inlet 2 High temperature regime means 60 C return temperature at heater inlet and 80 C feed temperature at heater outlet T See LL The back cover for contact details Baxi Heating UK Ltd 2015 II 5 0 Dimensions and Fixings Dimensions At least 5 116 160mm 207mm for 80 125mm flue syste
7. AAA 450mm min the Building Regulations give further detailed guidance A 450mm is applicable to 3 The discharge pipe should be run in a proprietary drain pipe properties up to 3 storeys material e g PVC PVC U ABS PVC C or PP For multi storey building installations consult BS 6798 4 Metal pipework is NOT suitable for use in condensate discharge systems 5 The pipe should be a minimum of 21 5mm diameter and must be supported using suitably spaced clips of the correct design to prevent sagging ii External termination via internal discharge branch e g sink waste downstream 6 It is advisable that the full length of condensate pipe is run internally and preferably be less than 3 metres 7 Internal runs greater than 3 metres or runs in cold areas should use 32mm waste pipe Pipe must terminate above 8 External runs MUST be a MINIMUM of 32mm and fully water level but below insulated with material suitable for external use surrounding surface Cut end at 45 9 If the boiler is fitted in an unheated location the entire condensate discharge pipe should be treated as an external run and sized and insulated accordingly 10 In all cases discharge pipe must be installed to aid disposal E of the condensate To reduce the risk of condensate being mg trapped as few bends and fittings as possible should be used and any burrs on cut pipe removed ht is NOT RECOMMENDED to connect upstream of t
8. Figs 40 amp 41 5 Turn CH temperature control knob fully clockwise As the knob is turned the display will change from 0 to 00 Fig 42 indicating maximum rate then revert to P alternating with the current boiler temperature Figs 43 amp 44 6 With the boiler operating in the maximum rate condition check that the operational working gas pressure at the inlet gas pressure test point Fig 39 is in accordance with B S 6798 amp BS 6891 7 Ensure that this inlet pressure can be obtained with all other gas appliances in the property working Measure the Gas Rate 8 With any other appliances amp pilot lights turned OFF the gas rate can be measured It should be between 24 model 2 61 m h 28 model 3 1 m h 33 model 3 6 m h 40 model 4 36 ch 9 The Calibration Function is active for 20 minutes unless the maximum CH temperature is exceeded 10 The function can be disabled at any time by turning the DHW temperature knob Carefully read and complete all sections of the Benchmark Commissioning Checklist at the rear of this publication that are relevant to the boiler and installation These details will be required in the event of any warranty work The publication must be handed to the user for safe keeping and each subsequent regular service visit recorded 2 For IE it is necessary to complete a Declaration of Conformity to indicate compliance with LS 813 An example
9. Short Circuit and Polarity j Pump Automatic Air Vent Selector Switch i Fig 35 i Pressure Gauge Display Y D He K A D N e Si Fig 36 Central Heating Domestic Hot Water Temperature Control Temperature Control 28 Baxi Heating UK Ltd 2015 10 0 Commissioning 10 1 Commissioning the Boiler Reference should be made to BS EN 12828 amp 14336 when commissioning the boiler 2 At the time of commissioning complete all relevant sections of the Benchmark Checklist at the rear of this publications 3 Open the mains water supply to the boiler 4 Open all hot water taps to purge the DHW system 5 Ensure that the filling loop is connected and open then open the heating flow and return valves on the boiler 6 Open the screw on the automatic air vent on the pump body Fig 34 IMPORTANT If the boiler is installed at a high point in the system it is strongly recommended that Automatic Air Vent Kit 720004701 is fitted Ensure that this vent is open 7 The system must be flushed in accordance with BS 7593 see Section 6 2 and the flushing agent manufacturers instructions 8 Pressurise the system to 1 5 bar Fig 35 then close and disconnect the filling loop 9 Turn the gas supply on and purge according to in GB BS 689 and in IE LS 813 Domestic Gas Installations 10 Test for gas tightness Hinge the facia panel upwards and refit t
10. Health amp Safety Executive operates the Gas Safe Register a self certification scheme for gas heating appliances These arrangements represent a change from the situation whereby compliance with Building Regulations was accepted as being demonstrated by completion of the Benchmark Logbook which was then left on site with the customer With the introduction of Self Certification Schemes the Benchmark Logbook is being withdrawn However a similar document in the form of a commissioning checklist and service interval record is incorporated at the back of these instructions This company is a member of the Benchmark initiative and fully supports the aims of the programme Its aim is to improve the standards of installation and commissioning of central heating systems in the UK and to encourage the regular servicing of all central heating systems to ensure safety and efficiency Building Regulations require that installations should comply with manufacturer s instructions It is therefore important that the commissioning checklist is completed by the installer The relevant section of 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 B i benchmar COLLECTIVE MARK
11. PE a j 26 O 7 Frost Protection Mode The frost protection mode is integral to the appliance and functions only with the selector switch see Section 2 1 in the domestic hot water and central heating position If the system temperature falls below 5 C then the boiler will fire on tts minimum setting until a flow temperature of 30 C is reached Further protection can be incorporated by using a system frost thermostat 25 24 j Pump Protection 22 With the selector switch see Section 2 1 in either the central heating or central heating and domestic hot water 21 23 position the pump will automatically operate for minute in every 24 hours to prevent sticking Fig 3 Baxi Heating UK Ltd 2015 9 Appliance Type 4 0 Technical Data Duo tec 24 28 33 amp 40 Combi ErP Inlet Pressure Natural Gas G20 mbar 20 Injector Natural Gas G20 7 5mm 24 amp 28 12mm 33 amp 40 Electrical Supply 230V 50H Appliance must be connected to an earthed supply Ci C33 Cs3 Appliance Category CAT LH Heat Input CH Qn Hs Gross Max Min 24 model kW 22 7 78 28 model kW 274 10 0 33 model kW 32 10 8 40 model kW 364 11 0 Heat Output CH Pn Non Condensing 24 model 28 model 33 model 40 model Heat Output CH Pne Condensing 24 m
12. Pressure Sensor Fig 61 Drain the primary circuit 2 Disconnect the two wires from the sensor 3 Undo the nut on the flow pipe securing and sealing the sensor 4 Remove the sensor examine the sealing washer replacing if necessary 5 Reassemble in reverse order The component is not polarised either wire will fit each terminal EMI Central Heating Temperature Sensor NTC Fig 60 Ease the retaining tab on the sensor away and disconnect the electrical plug 2 Unscrew the sensor from it s pocket and reassemble in reverse order The plug will only fit one way EM Safety Thermostat Fig 60 Pull the plug off the thermostat 2 Remove the screws securing the thermostat to the mounting plate on the flow pipe 3 Reassemble in reverse order ensuring that the plug is pushed fully on EAV DHW Temperature Sensor NTC Fig 61 Turn off the mains cold water supply tap and draw off the residual domestic hot water 2 Ease the retaining tab on the sensor away and disconnect the electrical plug 3 Unscrew the sensor from the plate heat exchanger manifold Examine the sealing washer replacing if necessary 4 Reassemble in reverse order The plug will only fit one way 37 13 0 Changing Components EMM Pump Head Only Fig 62 Drain the primary circuit and disconnect the electrical plug from the pump motor 2 Remove the socket head screws securing the pump head to t
13. Supplement 52 19 0 Notes 52 Benchmark Checklist 58 Baxi Heating UK Ltd 2015 1 0 Introduction IL Description The Baxi Duo tec Combi is a fully automatic gas fired wall mounted condensing combination boiler It is room sealed and fan assisted and will serve central heating and mains fed domestic hot water 2 The boiler is set to give a maximum output of 24 models 24 KW DHW 21 KW CH Pnc Condensing 28 models 28 KW DHW inc LPG 25 9 KW CH Pnc Condensing 33 models 33 KW DHW 30 3 KW CH Pnc Condensing 40 models 20 kW DHW 34 4 KW CH Pnc Condensing 3 It is designed for use on Natural Gas G20 A Propane version G31 of the 28 model is also available 4 The boiler is suitable for use only on fully pumped sealed heating systems Priority is given to domestic hot water 5 The boiler data badge gives details of the model serial number and Gas Council number and is situated on the inner door panel It is visible when the case front panel is removed weer SDF Fig 1 Control Box 6 The boiler model name and serial number are also shown on the information label on the underside of the facia This is for user reference 7 The boiler is intended to be installed in residential domestic 2 Data Badge Fig environments on a governed meter supply only Information Label 8 The boi
14. bottom Fig 29 Secure the flue to the elbow with the screws supplied Fig 28 16 Secure the elbow flue to the boiler adaptor with the screws supplied in the boiler fittings pack Fig 28 IMPORTANT It is essential that the flue terminal is fitted as shown to ensure correct boiler operation and prevent water entering the flue 17 Make good between the wall and air duct outside the building appropriate to the wall construction and fire rating 18 If necessary fit a terminal guard see Section 8 4 Cable Clamp Fig 31 Terminal Block Cover Facia Panel Fused Spur Fig 32 bk IOL 230V m Dk 2 AO el OL QLH e CO O br L TT 1 Frost Thermostat Fused Spur bk Fig 33 ae OC External Clock gy O O b br NOTE The 230V switched signal for external controls Frost Stat Room Stat Timer must always be taken from terminal 2 at the boiler Live Neutral and Earth to power these controls must be taken from the Fused Spur Baxi Heating UK Ltd 2015 9 0 Installation Making The Electrical Connections The boiler is fitted with a 1 3m length of 3 core cable This can be connected to the fused 3A 230V 50Hz supply NOTE Both the Live and Neutral connections are fused To connect an external control proceed as follows Slacken the facia panel securing screws and lift the outercase panel so that its secu
15. flue positions requiring Fig 12 a flue terminal guard 20 Baxi Heating UK Ltd 2015 Plume Displacement Kit 60 100 dia IM Extensions 45 amp 93 elbows are also available Horizontal Flues NOTE Horizontal flue pipes should always be installed with a fall of at least 1 5 from the terminal to allow condensate to run back to the boiler This bend is equivalent to metre This bend is equivalent to metre Total equivalent length A B C 2 x 90 Bends Baxi Heating UK Ltd 2015 8 0 Flue Options EU Horizontal Flue Systems The standard flue is suitable only for horizontal termination applications 2 All fittings should be fully engaged The approximate engagement is 40mm Apply the lubricant supplied to the seal on each fitting to aid assembly 3 Maximum permissible equivalent flue lengths are 60 100 80 125 Horizontal Concentric 10 metres 20 metres 4 Any additional in line bends in the flue system must be taken into consideration Their equivalent lengths are Concentric Pipes 135 bend 0 5 metres 93 bend 1 0 metres 5 The elbow supplied with the standard horizontal telescopic flue kit is not included in any equivalent length calculations NOTE Flue length is measured from point X to Y as shown IMPORTANT SUPPORT All flue systems MUST be securely supported a MINIMUM of once every metre It is recommended that every straight piec
16. noting their positions Also remove the electrodes as described in section 3 2 2 Undo the screws securing the collector to the venturi and the nuts holding the cover to the heat exchanger Draw the collector and cover assembly away 3 Remove the cover insulation piece 4 Fit the new insulation carefully over the burner and align it with the slots for the electrodes 5 If the rear insulation requires replacement remove it and all debris from the heat exchanger Also it may be necessary to separately remove the spring clip from the pin in the centre of the heat exchanger and the L shaped clips embedded in the insulation 6 DO NOT remove the shrink wrapped coating from the replacement rear insulation Keep the insulation vertical and press firmly into position 7 Examine the cover seal and replace if necessary Electrical Plug Flue Heat Exchanger Thermostat Sensor Fig 59 Flow Pipe Central Heating Temperature Sensor Plate Heat Pressure Sensor b Exchanger Fig 61 DHW Temperature Sensor Baxi Heating UK Ltd 2015 13 0 Changing Components Flue Heat Exchanger Thermostat Sensor Fig 59 Ease the retaining tab on the sensor away and disconnect the electrical plug 2 Turn the sensor 90 anticlockwise to remove it is a bayonet connection 3 Reassemble in reverse order Water
17. of this is given in LS 813 Domestic Gas Installations This is in addition to the Benchmark Commissioning Checklist 11 0 Completion ET Completion Instruct the user in the operation of the boiler and Case Front Panel system explaining the operational sequence 2 Set the central heating and hot water temperature control knobs to the requirements of the user 3 Carefully read and complete all sections of the Benchmark Commissioning Checklist at the rear of this publication that are relevant to the appliance and installation These details will be required in the event of any warranty work The publication must be handed to the user for safe keeping and each subsequent regular service visit recorded Bp 4 For IE it is necessary to complete a Declaration of Conformity to indicate compliance with LS 813 An example of this is given in I S 813 Domestic Gas Installations This is in addition to the Benchmark Commissioning Checklist 5 Hand over the Users Operating Installation and Servicing Instructions giving advice on the necessity of regular servicing Facia Panel Baxi Heating UK Ltd 2015 H Fig 45 Facia Panel Securing Screws Inner Door Fig 46 Panel Condensate Trap Fig 47 32 Baxi Heating UK Ltd 2015 1
18. quote the appliance name and model number 4 The flue terminal guard should be positioned centrally over the terminal and fixed as illustrated Flue Deflector Push the flue deflector over the terminal end It may point upwards as shown or up to 45 either way from vertical Secure the deflector to the terminal with screws provided 86 Flue Accessories Fig 14a For full details of Flue Accessories elbows extensions clamps etc refer to the Flue Installation Guide supplied in the literature pack Pre plumbing r To remove only the wal banding to the edge and Fig 16 For Side Flue Exit Fig 17 Flushing Tube Central Heating Return Baxi Heating UK Ltd 2015 jig slide open flaps Fig 19 Ze LIFT HERE BOTH SIDES Slide the wall jig out of carton then close the flaps Slide banding back on 40 model only H H H H H H H Flow Regulator 9 0 Installation ES Unpacking amp Initial Preparation The gas supply gas type and pressure must be checked for suitability before connection see Section 7 4 NOTE a small amount of water may drain from the boiler in the upright position See section Safe Manual Handling before unpacking or lifting the boiler RISK ASSESSMENT Before commencing the installation it is recommended that the Five Steps to Risk Assessment document published by the HSE is co
19. required Baxi Heating UK Ltd 2015 6 0 System Details 68 Domestic Hot Water Circuit Fig 7 All DHW circuits connections fittings etc should be fully in accordance with relevant standards and water supply regulations 2 Your attention is drawn to for GB Guidance G17 to G24 and recommendation RI7 to R24 of the Water Regulations Guide for IE the current edition of l S 813 Domestic Gas Installations 3 The Water Regulations recommendations for England and Wales prohibits backflow from appliances into the wholesome water supply due to thermal expansion However this type of instantaneous combination boiler with ess than 5 litres of stored capacity does not require any backflow prevention device as any thermal expansion is accommodated within the appliance t is possible in certain circumstances that other cold water demands e g washing machines flushing of W C s may affect the DHW function of the boiler In these instances the fitting of a backflow prevention device and expansion vessel is recommended 4 Also if there is an existing check valve loose jumpered stop cock water meter or water treatment device already fitted to the wholesome water supply connected to the boiler domestic hot water DHW inlet supply then a suitable expansion device may be required 5 The boiler s maximum working mains pressure is 8 bar therefore all pipework connections fittings etc should be suita
20. satisfactory completion of the CPAI ACS assessment which covers the use of electronic portable combustion gas analysers in accordance with BS 7967 Parts to 4 Check the Combustion Performance CO CO ratio 4 Set the boiler to operate at maximum rate as described in Section 14 1 1 to 14 1 6 5 Remove the plug from the flue sampling point insert the analyser probe and obtain the CO COratio This must be less than 0 004 6 If the combustion reading CO CO 2 ratio is greater than this and the integrity of the complete flue system and combustion circuit seals has been verified and the inlet gas pressure and gas rate are satisfactory either e Perform the Annual Servicing Inspection Section 12 2 amp re check e Adjust the gas valve Section 14 0 amp re check e Replace the gas valve Section 13 24 amp re check Annual Servicing Inspection Ensure that the boiler is cool 2 Ensure that both the gas and electrical supplies to the boiler are isolated 3 Slacken the screws securing the facia panel Lift the outercase panel so that its securing tabs are clear of the facia Remove the panel allowing the facia to hinge down Fig 45 4 Remove the screws securing the inner door panel Lift the panel slightly to disengage it from the studs on top of the case Fig 46 5 Unscrew the sump from the bottom of the condensate trap assembly Fig 47 and remove any deposits from the sump and trap Cl
21. securing the bracket to the boiler 3 Remove the igniter and transfer the bracket to the new component 4 Reassemble in reverse order Spark and Sensing Electrodes Fig 53 Disconnect the electrode leads noting their positions 2 Remove the retaining screws securing each of the electrodes to the combustion box cover and remove the electrodes 3 Check the condition of the sealing gaskets and replace if necessary Reassemble in reverse order Spark Electrode Electrode Leads Sensing Electrode Fig 53 34 Baxi Heating UK Ltd 2015 13 0 Changing Components Fan Fig 54 Undo the nut on the gas inlet pipe to the venturi Fig 54 and pull the sensing pipe off the fan 2 Disconnect the electrode leads noting their position and di sconnect the fan electrical plugs 3 Undo the screws securing the collector to the extension piece 4 Remove the collector and fan assembly being careful to retain the injector in the venturi 5 Undo the screws securing the fan to the venturi and fit the new fan replacing the seal if necessary 6 Examine the burner gasket and replace if necessary Venturi 7 Reassemble in reverse order ensuring that the injector is in place and the sensing pipe is connected to the fan Injector EE Venturi Fig 55 Remove the collector and fan assembly as d
22. that the labels marked TOP on the Terminal and Connection Assemblies are uppermost 9 Using the clearance holes in the Connection Assembly secure it to the Terminal Assembly using the screws supplied Fig 26 25 Flue Elbow Apply Lubricant for ease of assembly Ensure Elbow is fully engaged into Boiler Adaptor Fig 27 Apply the lubricant supplied for ease of assembly do not use any other type Ensure Flue is fully engaged into Elbow Fig 28 Flue to elbow securing screws Elbow to adaptor securing screws Slots at bottom 26 Baxi Heating UK Ltd 2015 Fig 29 9 0 Installation 96 Fitting the Flue Cont 0 Remove the flue elbow and insert the flue through the hole in the wall Refit the elbow to the boiler adaptor ensuring that it is pushed fully in Fig 27 2 Two flue trims are supplied one for internal use the other for outside The internal trim is packaged and identified as such it should not be used externally 13 It is recommended that if the internal trim is being used it is first fitted over the elbow to allow access to the securing screws and then manouvered into place against the wall 14 Draw the flue back through the wall and engage it in the elbow It may be necessary to lubricate to ease assembly of the elbow and flue Fig 28 15 Ensure that the terminal is positioned with the slots to the
23. 00 indicating maximum rate then revert to P alternating with the current boiler temperature Figs 78 79 amp 80 7 Remove the plug from the flue sampling test point Insert the analyser probe and allow sufficient time for the reading to settle Fig 81 The CO should be 8 7 0 2 Flue Adaptor Test 8 It is possible to alter the CO by adjustment of the gas Point FAC SK valve Remove the plastic cover from the Throttle Adjustment Screw At maximum rate the Throttle Plug Adjustment Screw should be turned using a suitable Analyser Probe hexagon key until the correct reading is obtained Fig 82 Turning clockwise will reduce the CO Anticlockwise will increase the COz 9 The CO must then be checked at minimum rate Turn et es the left hand knob fully anti clockwise As the knob is turned cap fitted Throttle the display will change indicating the fan speed When the Adjustment Screw display reads DI the boiler runs at minimum rate cover removed The CO should be 8 4 0 2 _ 10 With the boiler on minimum the Offset Adjustment CY Screw must be altered using a suitable hexagon key after Reduce CO Increase CO2 at min rate at min rate Reduce CO Increase CO2 removing the cap Fig 82 Turning anti clockwise will reduce at max rate at max rate the CO Clockwise will increase the CO ifthe COs ireset atminimu Gas Valve The Calibration Function is maint
24. 2 0 Servicing Annual Servicing For reasons of safety and economy it is recommended that the boiler is serviced annually Servicing must be performed by a competent person in accordance with B S 7967 4 2 After servicing complete the relevant Service Interval Record section of the Benchmark Commissioning Checklist at the rear of this publication IMPORTANT During routine servicing and after any maintenance or change of part of the combustion circuit the following must be checked e The integrity of the complete flue system and the flue seals e The integrity of the boiler combustion circuit and relevant seals as described in Section 2 2 e The operational gas inlet pressure as described in Section 10 3 1 to 10 3 7 and the gas rate as described in 10 3 8 e The combustion performance as described in Check the Combustion Performance 12 1 4 to 12 1 6 below 3 Competence to carry out Checking Combustion Performance B S 6798 Specification for Installation amp Maintenance of Gas Fired Boilers not exceeding 70kWV advises that The person carrying out a combustion measurement should have been assessed as competent in the use of a flue gas analyser and the interpretation of the results e The flue gas analyser used should be one meeting the requirements of BS7927 or BS EN50379 3 and be calibrated in accordance with the analyser manufacturers requirements Competence can be demonstrated by
25. A Hall Effect Sensor Fig 66 Ease the sensor upwards off the hydraulic inlet manifold assembly 2 Disconnect the electrical plug from the sensor 3 Connect the plug to the new sensor Carefully fit the new Fig 64 Pressure Gauge sensor to the hydraulic assembly ensuring it is fully down Capillary Hall Effect Sensor 2 Safety Pressure Relief Valve Fig 67 Drain the primary circuit 2 Disconnect the discharge pipe from the valve Using a suitable hexagon key undo the grub screw sufficiently to release the valve 3 Note the orientation of the valve rotate it and withdraw it from the manifold 4 Fit the new valve and O ring seal and set to the previously noted orientation Reassemble in reverse order Discharge Pipe Baxi Heating UK Ltd 2015 39 13 0 Changing Components EAEE Plate Heat Exchanger Fig 68 Plate Heat Exchanger Drain the primary circuit and remove the gas valve as k described in section 13 24 2 While supporting the heat exchanger undo the screws securing it to the brass manifolds 3 Withdraw the heat exchanger upwards taking care not to damage any wires or controls Seals Z gt t tons d 4 There are four rubber seals between the manifolds and i heat exchanger which may need replacement Fig 68 5 Ease the seals out of the manifold Replace carefully Rubber Seal ensuring that when the seal i
26. Cock Zone 2 LL Window Recess Window Recess Zone 2 zm pm o In GB Only Ceiling Window Recess Outside Zones 1 0 6 m Fig B In GB Only Baxi Heating UK Ltd 2015 7 0 Site Requirement Ventilation of Compartments Where the appliance is installed in a cupboard or compartment no air vents are required 2 BS 5440 Part 2 refers to room sealed appliances installed in compartments The appliance will run sufficiently cool without ventilation Gas Supply The gas installation should be in accordance with the relevant standards In GB this is BS 6891 In IE this is the current edition of l S 813 Domestic Gas Installations 2 The connection to the appliance is a 22mm copper tail located at the rear of the gas service cock Fig 10 3 Ensure that the pipework from the meter to the appliance is of adequate size and the demands of any other gas appliances in the property are taken into consideration Do not use pipes of a smaller diameter than the boiler gas connection 22mm Electrical Supply External wiring must be correctly earthed polarised and in accordance with relevant regulations rules In GB this is the current LEE Wiring Regulations In IE reference should be made to the current edition of ETCI rules 2 The mains supply is 230V 50H fused at 3A NOTE The method of connection to the electricity supply must facilitate com
27. K Ltd 2015 All rights reserved No part of this publication may be reproduced or transmitted in any form or by any means or stored in any retrieval system of any nature including in any database in each case whether electronic mechanical recording or otherwise without the prior written permission of the copyright owner except for permitted fair dealing under Copyrights Designs and Patents Act 1988 Applications for the copyright owner s permission to reproduce or make other use of any part of this publication should be made giving details of the proposed use to the following address The Company Secretary Baxi Heating UK Ltd Brooks House Coventry Road Warwick CV34 4LL Full acknowledgement of author and source must be given WARNING Any person who does any unauthorised act in relation to a copyright work may be liable to criminal prosecution and civil claims for damages C cose 2 Baxi Heating UK Ltd 2015 WRA 1 0 Introduction Building Regulations and the Benchmark Commissioning Checklist Building Regulations England amp Wales require notification of the installation of a heating appliance to the relevant Local Authority Building Control Department From April 2005 this can be achieved via a Competent Persons Self Certification Scheme as an option to notifying the Local Authority directly Similar arrangements will follow for Scotland and will apply in Northern Ireland from January 2006 The
28. TC sensor Burner lights Go to section E Burner output modulates to Error 130 flashing maintain the temperature set YES Baxi Heating UK Ltd 2015 Go to section hi YES YES Pump continues to run for 3 O Fan stops after 10 seconds Jeff minutes paration a room thermostat open ens 17 0 Fault Finding Domestic Hot Water Follow operational sequence T lect itch t urn sel ector swi Cc to fe NO Go to section A The display illuminates YES Error 110 flashing YES Turn the selector switch to YES If the error 10 is still flashing Error 133 flashing reset position for 5 seconds Go to section J NO NO NO Turn Domestic Hot Water thermostat to Maximum Open DHW tap fully DHW Hall Effect sensor operated red neon on the YES Error 19 flashing a sensor illuminated YES 3 way valve is open to Domestic Hot Water circuit YES YES YES YES Spark at ignition electrodes for up to 5 seconds and for 3 attempts Burner lights YES Burner output modulates to maintain the temperature set YES Close DHW tap YES DHW flow sensor senses no flow Burner goes out 48 Baxi Heating UK Ltd 2015 NO NO NO YES DHW flow rate more than 2 YES l min Go to section K Error 125 Go to sect Error 160 flashing Go to section D Error 160 flashing Go to section L Error 133 flashing Burner does not stay alight
29. THE MARK OF QUALITY FOR THE INSTALLATION COMMISSIONING AND SERVICING OF DOMESTIC HEATING AND HOT WATER SYSTEMS ISO 9001 FM 00866 Installer Notification Guidelines Choose Building Regulations Notification Route Competent Person s Self Certification Scheme Install and Commission this appliance to manufacturer s instructions Complete the Benchmark Checklist If you notify via the Gas Safe Register the register will issue the Building Regulations certificate on members behalf Scheme Members only Call Gas Safe Register on 0800 408 5577 or log onto www gassaferegister co uk within 10 days You must ensure that the certificate number issued by the Gas Safe Register is written onto the Benchmark Checklist Gas Safe Register will issue a Building Regulations Compliance Certificate to the property owner and inform the relevant LABC Baxi Heating UK Ltd 2015 Building Control Contact your relevant Local Authority Building Control LABC who will arrange an inspection or contact a government approved inspector Install and Commission this appliance to manufacturer s instructions Complete the Benchmark Checklist LABC will record the data and will issue a certificate of compliance 4 IMPORTANT Installation Commissioning Service amp Repair This appliance must be installed in accordance with the manufacturer s instructions and the regulations in fo
30. United Kingdom en Installation and Service Manual Gas Fired Wall Mounted Condensing Combination Boiler Duo tec Combi 24 28 33 40 28 LPG These instructions include the Benchmark Commissioning Checklist and should be left with the user for safe keeping They must be read in conjunction with the Flue Installation Guide Natural Gas Baxi Duo tec 24 Combi ErP G C NP 47 075 96 Baxi Duo tec 28 Combi ErP G C NP 47 075 97 Baxi Duo tec 33 Combi ErP G C N 47 075 99 Baxi Duo tec 40 Combi ErP G C N 47 077 03 Propane Baxi Duo tec 28 LPG Combi ErP G C NP 47 075 98 The Benchmark Scheme Benchmark places responsibilities on both manufacturers and installers The purpose is to ensure that customers are provided with the correct equipment for their needs that it is installed commissioned and serviced in accordance with the manufacturer s instructions by competent persons and that it meets the requirements of the appropriate Building Regulations The Benchmark Checklist can be used to demonstrate compliance with Building Regulations and should be provided to the customer for future reference Installers are required to carry out installation commissioning and servicing work in accordance with the Benchmark Code of Practice which is available from the Heating and Hotwater Industry Council who manage and promote the Scheme Visit www centralheating co uk for more information Baxi Heating U
31. ained for 20 minutes rate tt must be rechecked at maximum rate again and adjusted if required If the CO is reset at unless the maximum CH temperature is exceeded The Do not turn the adjustment function can be disabled at any time by turning the right screws more than 1 8 of a turn at hand knob maxsimum tate ie must be a time Allow the analyser reading rechecked at minimum rate and adjusted if required to settle before any further 12 Check the Combustion Performance CO CO gt ratio adjustment This must be less than 0 004 Baxi Heating UK Ltd 2015 43 15 0 Electrical Illustrated Wiring Diagram Central Heating DHW NTC Sensor NTC Sensor Overheat Stat Z D Hall Effect Sensor Water Pressure Switch Flue Sensor Flame Sensing Electrode 987654321 10987654321 bk Control PCB 5 d a bk X501 b R l 2 l 2 Bio ae IS 2 3 4 5 6 7 8 9 xI soll 5 x3 hU Pump J ee HIT l eu H br ay b Lk LI Connector L E d JEE i KE LL T ES Ei ES x Eegen Se b LL 11 WO E X2 X3 Odd L GES EC S Ba Spark lt e Generator Diverter Valve Gas Valve Ignition Electrode Mains Input Cable br brown g green bk black gly green yellow b blue r red w white 44 Baxi Heating UK Ltd 2015 16 0 Short Parts List Short Parts List Key Des
32. aintained for 20 minutes unless the maximum CH temperature is exceeded The function can be disabled at any time by turning the right hand knob 10 0 Commissioning Checking Combustion Follow the flow chart opposite Is O2 2 20 6 and CO2 lt 0 2 Is CO lt 350ppm and CO CO ratio lt 0 004 Is O2 2 20 6 and CO2 lt 0 2 Is CO lt 350ppm and CO CO ratio lt 0 004 Is CO lt 350ppm and CO CO ratio lt 0 004 Baxi Heating UK Ltd 2015 29 Central Heating Temperature Control Domestic Hot Water Fig 38 Temperature Control Selector Switch Display Y D DAP Central Heating Domestic Hot Water Temperature Control Temperature Control Gas Pressure Test Point Fig 43 30 Baxi Heating UK Ltd 2007 QiQa P Fig 44 10 0 Commissioning Check the Operational Working Gas Inlet Pressure Ensure that all controls are calling for heat and the selector switch is in the central heating and hot water position Wei The current boiler temperature is shown on the display 2 To check the gas rate it is necessary to set the boiler to Calibration Mode 3 Turn both temperature control knobs fully anticlockwise then quickly turn the DHW temperature knob 4 clockwise twice and back fully anticlockwise Fig 38 4 The display will now alternate between SF and the current boiler temperature and both green LEDs will flash
33. all Fig 23 Thickness Peak to be uppermost Ke Sealing Tape Fig 25 TOP Label Baxi Heating UK Ltd 2015 9 0 Installation 96 Fitting The Flue HORIZONTAL TELESCOPIC FLUE There are two telescopic sections the Terminal Assembly and the Connection Assembly a roll of sealing tape and two self tapping screws A 93 elbow is also supplied 2 The two sections can be adjusted to provide a length between 315mm and 500mm Fig 22 when measured from the flue elbow there is 50mm engagement into the elbow 3 Locate the flue elbow on the adaptor at the top of the boiler Set the elbow to the required orientation Fig 23 NOTE The flue elbow is angled at 93 degrees to ensure a fall back to the boiler 4 Measure the distance from the outside wall face to the elbow This dimension will be known as X Fig 23 5 If the distance from the flue elbow to the outside face of the wall X in Fig 23 is less than 250mm the Connection Assembly can be discarded and the Terminal Assembly fitted directly into the elbow 6 In instances where the dimension X Fig 23 is between 250mm and 315mm it will be necessary to shorten the Terminal Assembly by careful cutting to accommodate walls of these thicknesses 7 To dimension X add 40mm This dimension to be known as Y 8 Adjust the two telescopic sections to dimension Y and seal the joint with the tape provided Fig 25 Ensure
34. and remove the P C B Transfer the control knob drive pins to the new P C B and turn them fully anticlockwise Control Box Cover Fi 5 Reassemble in reverse order ensuring that the ig 70 temperature controllers are reset to their previous positions PB ER Pump P C B Figs 70 amp 71 Completely undo the screws securing the control box Selector Switch cover and release the cover retaining barbs from their slots 2 Note the position of all plugs and wires on the P C B and e Te e i disconnect them Undo the securing screws and remove the a Gs d Drive Pins P C B Q Gg 3 Reassemble in reverse order ERKER Selector Switch Figs 70 amp 71 Note the setting of the selector switch knob and carefully i pull it off the facia Facia 2 Completely undo the screws securing the control box cover and release the cover retaining barbs from their slots 3 Note the position of the electrical connections and the Fig 71 orientation of the switch Remove the electrical connections 4 Remove the screws securing the switch to the facia panel 5 Fit the new switch ensuring that it is correctly positioned and reassemble in reverse order Baxi Heating UK Ltd 2015 41 13 0 Changing Components EVER Gas Valve Fig 72 Venturi Inlet IMPORTANT After replacing the valve the CO2 must be checked and adjusted as detailed in Section 14 0 Settin
35. ault Finding E Temperature sensors faulty Cold resistance approximately 10kQ 25 C DHW and CH sensors 20kQ 25 C Flue sensor resistance reduces with increase in temp Check and correct the connection of the tube between the venturi and gas valve 2 bis Ensure gas is on and purged PCB X3 connector is 230V AC across terminals amp 2 NO Replace PCB Replace gas valve Ensure that the Hall Effect Sensor is in position YES Check the voltage between red wire and blue Check the connection between the PCB X400 wire is more than 5V DC connector terminals 3 6 7 and the electronic sensor NO YES Replace PCB Replace Hall Effect Sensor Voltage at PCB X2 connector is at least 100V DC across terminals 2 amp 5 Note from multimeter connect common to 2 amp volts to 5 Check wiring H Check and correct if necessary Ignition electrode and lead 2 Electrode connection 3 Spark gap and position Burner Sensing Electrode Spark Ignition Ka Electrode oe Electrode Position 50 Baxi Heating UK Ltd 2015 17 0 Fault Finding Check supply pressure at the gas valve Minimum 17 mbar 2 Check and correct if necessary The mechanical set of the gas valve CO2 values see instruction 2 Flame sensing electrode and lead connections 3 Flame sensing electrode position Replace PCB Replace flame sensing electrode Flame current
36. ble for pressures in excess of 8 bar A pressure reducing valve must be fitted for pressures in excess of 8 bar The manufacturer of any outlet fittings such as a shower valve may require a lower maximum pressure The pressure reduction must take account of all fittings connected to the DHW system 69 Showers If a shower control is supplied from the appliance it should be of the thermostatic or pressure balanced type Thermostatic type shower valves provide the best comfort and guard against water at too high a temperature Existing controls may not be suitable refer to the shower valve manufacturer 6 10 Hard Water Areas Only water that has NOT been artificially softened must used when filling or re pressurising the primary system If the mains cold water to the property is fitted with an artificial softening treatment device the source use to fill or re pressurise the system must be upstream of such a device 7 0 Site Requirements Location 175mm Min The boiler may be fitted to any suitable wall with the flue 5mm Min 450mm 300mm Min if passing through an outside wall or roof and discharging to using 80 125mm atmosphere in a position permitting satisfactory removal of flueing system combustion products and providing an adequate air supply i Y The boiler should be fitted within the building unless otherwise protected by a suitable enclosure i e garage or outhouse The boiler may b
37. cription Manufacturers No Part No 311 Fan 5121447 426 Motor 3 way Valve 7216534 315 Igniter Electrode 72022280 316 Sensing Electrode 72022290 422 Gas Valve 720301001 624 Hall Effect Sensor 5114767 306 Burner 24 28 5122149 Burner 33 5114697 Burner 40 5114698 419 Water Pressure Switch 5114748 400 Plate Heat Exchanger 24 28 248048 Plate Heat Exchanger 33 40 248273 415 Pump 7220533 302 Flue Thermostat 5114747 421 NTC Sensor 5114725 420 Overheat Thermostat 5114729 504 Pressure Gauge 5118385 503 PCB 24 5121862 PCB 28 720043401 PCB 33 720795201 PCB 40 5122287 505 Pump PCB 7222704 504 Baxi Heating UK Ltd 2015 45 NOTE When instructed to turn the selector to the reset position turn the selector switch fully anticlockwise against the spring pressure to the reset position and hold for 5 seconds to reset the boiler Table Of Error Codes Central Heating NTC Fault Flue NTC Fault Hot Water NTC Fault Safety Thermostat Operated Water Pressure Switch Not Operated Circulation Fault Primary Circuit Flue NTC Operated Interruption Of Gas Supply or Flame Failure Fan or Fan Wiring Fault Pre Circulation Fault 46 Baxi Heating UK Ltd 2015 17 0 Fault Finding Initial Fault Finding Checks Check that gas water and electrical supplies are available at the boiler 2 Electrical supply 230V 50 Hz 3 CH water system pressurised to 0 5 bar minimum when the boi
38. dling page 5 3 Insert the sealing washers between the valves and pipes on the wall plate and the boiler connections 4 Tighten all the connections Fitting the Safety Pressure Relief Discharge Pipe Fig 21 Remove the discharge pipe from the kit 2 Determine the routing of the discharge pipe in the vicinity of the boiler Make up as much of the pipework as is practical including the discharge pipe supplied 3 The pipework must be at least 5mm diameter and run continuously downwards to a discharge point outside the building See section 6 7 for further details 4 Utilising one of the sealing washers connect the discharge pipe to the adaptor and tighten the nut 5 Complete the discharge pipework and route it to the outside discharge point IMPORTANT Make all soldered joints before connecting to the pressure relief valve Condensate Drain see section 7 7 Connect the condensate drain to the trap outlet pipe Ensure the discharge of condensate complies with any national or local regulations in force see British Gas Guidance Notes for the Installation of Domestic Gas Condensing Boilers 2 The connection will accept 21 5mm in plastic overflow pipe which should generally discharge internally into the household drainage system If this is not possible discharge into an outside drain is acceptable Terminal Assembly Connection Assembly Fig 22 Wall Thickness Z W
39. e fitted inside a cupboard see Section 7 3 2 lf the boiler is sited in an unheated enclosure then it is recommended to leave the ON OFF Selector Switch in the domestic hot water and central heating position to give frost protection 780mm 3 If the boiler is fitted in a room containing a bath or shower reference must be made to the relevant requirements In GB this is the current LEE Wiring Regulations and Building Regulations In IE reference should be made to the current edition of l S 813 Domestic Gas Installations and the current ETCI rules 4 If the boiler is to be fitted into a building of timber frame 2 SS construction then reference must be made to the current A edition of Institute of Gas Engineers Publication IGE UP 7 Fic 8 Gas Installations in Timber Framed Housing ig y This is the MINIMUM recommended dimension Greater clearance will aid installation and maintenance U A At least 1 5 Clearances Figs 8 amp 9 A flat vertical area is required for the installation of the boiler 2 These dimensions include the necessary clearances around the boiler for case removal spanner access and air movement Additional clearances may be required for the passage of pipes around local obstructions such as joists running parallel to the front face of the boiler 450mm Min For Servicing Purposes In Operation Fig 9 16 Baxi Heating UK Ltd 2015 Gas Service
40. e is supported irrespective of length Additional supports are available as accessories VOIDS Consideration must be given to flue systems in voids and the provision of adequate access for subsequent periodic visual inspection 6 Read this section in conjunction with the Flue Installation Guide supplied with the boiler 21 Fig 13 Ensure that no part of the white outer chimney duct is visible 22 Baxi Heating UK Ltd 2015 Flue Deflector 60 100 Flue 80 125 Fi 80 80 Twi Fig 14a 8 0 Flue Options Flue Lengths The standard horizontal telescopic flue kit allows for lengths between 315mm and 500mm from elbow to terminal without the need for cutting Fig 13 Extensions of 250mm 500mm amp Im are available The maximum permissible equivalent flue length is 10 metres 60 100 system vertical amp horizontal 20 metres 80 125 system vertical amp horizontal 15 metres 80 80 twin pipe Flue Trim The flexible flue trims supplied can be fitted on the outer and inner faces of the wall of installation Terminal Guard Fig 14 When codes of practice dictate the use of terminal guards Multifit accessory part no 720627901 can be used Note This is not compatible with Flue Deflector referred to below 2 There must be a clearance of at least 50mm between any part of the terminal and the guard 3 When ordering a terminal guard
41. ean as necessary and replace the sump 12 0 Servicing H Annual Servicing Inspection Cont Ge A Burner 2 6 Undo the nut on the gas inlet pipe to the venturi Fig 65 and pull the sensing pipe off the fan Viewing Window 7 Disconnect the electrode leads noting their position and he fan electrical plugs Fig 48 8 Undo the four nuts retaining the combustion box cover Sensing to the heat exchanger Electrode Spark Ignition Electrode 9 Carefully draw the fan collector and cover assembly forward being careful to retain the injector in the venturi Figs 48 amp 49 0 Clean any debris from the heat exchanger and check that the gaps between the tubes are clear Fan Collector and Cover Inspect the burner electrodes position and insulation Assembly cleaning or replacing if necessary Clean any dirt or dust from the air box 12 Reassemble in reverse order i LA OFE N D S NOTE The sensing pipe must be reconnected to the ere AN Z f i Sx fan not the venturi 7 Electrode Leads DHW Filter Fig 51 3 If the flow of domestic hot water is diminished it may be necessary to clean the filter 4 Initially check the cold water inlet tap filter 5 Turn the tap off and draw off from a hot tap Undo the blanking cap and remove the threaded bush Fig 50 6 Extract the filter and rinse thoroughl
42. ecting to a rain water drain that drain MUST POSSIBILITY OF THE PIPEWORK BEING SUBJECT ER FREEZING CONDITIONS AND APPROPRIATE discharge into a foul drain MEASURES TAKEN TO PREVENT BLOCKAGE CORRECT INSTALLATION IN ACCORDANCE WITH THIS SECTION WILL CONSIDERABLY MINIMISE THE LIKELIHOOD OF BLOCKAGE AND SUBSEQUENT 21 5mm 32mm Insulation BOILER LOCK OUT A CONDENSATE DISCHARGE PUMP AND PIPE TRACE HEATING ARE AVAILABLE AS ACCESSORIES see paragraphs 7 7 12 to 7 715 for further details The condensate discharge pipe MUST NOT RISE at any point along its length There MUST be a fall of AT LEAST 2 5 50mm per metre along the entire run EXCEPT when employing a suitable condensate pump in basement and cellar or similar applications It is strongly recommended to discharge internally into the household The boiler condensate trap incorporates a seal of 75mm therefore it is unnecessary to install an air break and trap in the discharge pipework i Termination to an internal soil and vent pipe The condensate outlet will accept 21 5mm 4in plastic overflow pipe It is strongly recommended that this discharges internally into the household drainage system Where this is not possible discharge into an outside drain is permissible providing every possible precaution is taken to prevent freezing 2 Ensure the discharge of condensate complies with any national or local regulations in force BS 6798 amp Part HI of
43. el kW 24 8 7 Seasonal space heating energy efficiency Ins Ss Heat Output CH Pne Condensing Useful efficiency at rated heat output and 74 9 Max in high temperature regime 28 model kW 259 95 Useful efficiency at 30 of rated heat bf E output and low temperature regime Heat Output CH Pn Non Condensing Max in Heat Input DHW Qnw Hs Gross Max 28 mode W 32 1 28 mode W 28 Max Gas Rate Propane G31 ar Afer 0 mins P 70 70 70 W W W Standby heat loss 28 mode g h 225 W WI G WI 70 W Auxiliary electricity consumption Full load Ignition burner power consumption Inlet Pressure Propane G31 Annual energy consumption Q mbar 37 Sound power level indoors HE Emissions of nitrogen oxides NOx Setting the Gas Valve CO check Declared load profile h J Daily electricity consumption h h Domestic hot water parameters TI oo 7 Remove the plug from the flue sampling test point Insert the analyser probe and allow sufficient time for the reading to settle Fig 99 Annual electricity consumption 41 The CO should be 10 0 2 e 2 shou e o IV Water heating energy efficiency 9 81 Daily fuel consumption k 24 307 FC A fuel ti a GJ 18 9 The CO2 must then be checked at minimum rate Turn ee eee LAFC ou the left hand knob fully anti clockwise As the knob is turned 1 Low temperature means for condensing boilers 30 C for low tempe
44. escribed in section 3 3 2 Extract the injector from the venturi 3 Undo the screws securing the fan to the venturi and the venturi to the collector IMPORTANT When fitting the new venturi ensure the arrows on it s base point into the collector Fig 56 4 Examine the seals and burner gasket replace if necessary 5 Reassemble in reverse order ensuring that the injector is Gas Inlet in place Injector Fig 55 Venturi Remove the collector and fan assembly as described in section 13 3 ie Injector 2 Extract and replace the injector and reassemble in reverse Fig 55 order Fig 56 When fitting the venturi ensure that the arrow is pointing forward Baxi Heating UK Ltd 2015 35 Gasket Extension Piece Not on 33 amp 40 models Spark Electrode Sensing Leads Electrode 36 Baxi Heating UK Ltd 2015 Cover WO Burner Heat Exchanger Rear Insulation Collector Insulation Fig 58 Venturi Venturi 13 0 Changing Components Burner Fig 57 Undo the screws securing the collector to the venturi and extension piece Remove this extension piece from the cover on 24 and 28 models 2 Withdraw the burner from the cover and replace with the new one 3 Examine the gasket replacing if necessary 4 Reassemble in reverse order Insulation Fig 58 Remove the electrode leads
45. fit to the boiler 5 Examine the sealing washer replacing if necessary and reassemble in reverse order Boiler Chassis IDa Lock Nut Fig 74 42 Baxi Heating UK Ltd 2015 14 0 Setting the Gas Valve Setting the Gas Valve CO check IMPORTANT The CO must be only be checked and adjusted to set the valve if a suitable calibrated o combustion analyser is available operated by a competent person see Section 12 1 Central Heating Domestic Hot Water Temperature Control Fig 75 i P ig Temperature Control The combustion CO2 may be checked after running the boiler for several minutes To do this it is necessary to set i Displa EE Swen ER the boiler to Calibration Mode 2 Ensure that all external controls are calling for heat The Es z actual current boiler temperature is shown on the display j kd L W 3 Turn both control knobs fully anticlockwise then quickly i turn the right hand knob 4 clockwise twice and back fully Central Heating Domestic Hot Water 5 anticlockwise Fig 75 Temperature Control Temperature Control 4 The display will now alternate between SF and the current boiler temperature and both green LEDs will flash Figs 76 amp 77 5 Turn the left hand knob fully clockwise As the knob is tumed the display will change indicating the fan speed 6 The display will show
46. for a minimum of 5 seconds when EI 10 E130 amp E133 are displayed it is possible to relight the boiler 4 If this does not have any effect or the codes are displayed regularly further investigation is required 17 0 Fault Finding Refer to Section 16 0 Illustrated Wiring Diagram for position of terminals and components Central Heating Follow operational sequence Turn selector switch to GE No Guise tonte The display illuminates YES Error 10 flashing Error 130 flashing Error 133 flashing NO NO Turn the selector switch to If the error 10 is still flashing reset position for 5 seconds Go to section J Go to section E Go to section C Ensure controls are set to demand and verify the contacts are closed Turn Central Heating Ensure all controls and thermostat to Maximum integral clock are calling for Go to section B Pump runs heat YES NO Ensure that primary Error E125 or E193 flashing circulation is OK amp that there is no blockage YES YES E Grossir NO Error 160 flashing KEN Go to section D TES Error 160 flashing Fan runs at correct speed EE Go to section L YES Spark at ignition electrodes for up to 5 seconds and for 3 Error 33 flashing attempts 3 way valve is open to Central Heating circuit Burner does not stay alights YES Error 33 flashing after 5 seconds Go to section I Check the Central Heating N
47. g the Gas Valve Only change the valve if a suitable Sensing Pipe calibrated combustion analyser is available operated by a competent person see section 12 1 Ga Ze Turn the gas cock off and undo the nut on the gas feed elbow under the boiler 2 Remove the screws securing the gas valve the boiler bottom panel 3 Pull off the power lead earth lead and sensing pipe Earth Lead 4 Undo the nut on the gas pipe at the gas air inlet and the gas Gas Feed Elbow valve Remove the pipe taking care not to lose the sealing washers Remove the valve 5 Reassemble in reverse order ensuring that all seals are in place and the injector is fitted Fig 72 6 Reassemble in reverse order Throttle NOTE To assist the boiler to light prior to final setting Adjustment Screw use a suitable hexagon key to wind out the Throttle a Adjustment Screw until it is flush with the valve body then turn the screw 4 full turns clockwise Fig 73 If the boiler will not light or the correct CO cannot be achieved contact Baxi Customer Support 0344 871 1525 EPS Expansion Vessel Fig 74 Drain the primary circuit and undo the nut on the vessel connection pipe 2 Undo and remove the locknut securing the vessel spigot to the boiler air box 3 Remove the bracket and vessel from the boiler Expansion Vessel 4 Locate the retaining bracket on the upper flange of the vessel and
48. g Regulations either The Building Regulations The Building Regulations Scotland Building Regulations Northern Ireland The Water Fittings Regulations or Water Byelaws in Scotland The Current LEE Wiring Regulations Where no specific instructions are given reference should be made to the relevant British Standard Code of Practice In IE the installation must be carried out by a competent Person and installed in accordance with the current edition of LS 813 Domestic Gas Installations the current Building Regulations and reference should be made to the current ETC rules for electrical installation All systems must be thoroughly flushed and treated with inhibitor see section 6 2 Codes of Practice refer to the most recent version In GB the following Codes of Practice apply Standard Scope BS 6891 Gas Installation BS 5546 Installation of hot water supplies for domestic purposes BS EN 12828 Heating systems in buildings BS EN 14336 Installation amp commissioning of water based heating systems BS 6798 Installation of gas fired hot water boilers BS 5440 Part Flues BS 5440 Part 2 Ventilation BS 7074 Expansion vessels and ancillary equipment for sealed water systems BS 7593 Treatment of water in domestic hot water central heating systems In IE the following Codes of Practice apply Standard Scope S 813 Domestic Gas Installations The following standards give valuable addit
49. he sink or other waste water receptacle 18 Baxi Heating UK Ltd 2015 Condensate Pump iii Termination to a drain or gully Pipe must terminate above water level but below surrounding surface Cut end at 45 iv Termination to a purpose made soakaway Further specific requirements for soakaway design are referred to in BS 6798 gt e100 mm min Holes in the soak away must face away from the building v pumped into an internal discharge branch e g sink waste downstream of the trap Pipe must terminate above water level but below surrounding surface Cut end at 45 Basement or similar heated t Boiler vi pumped into an external soil amp vent pipe Unheated Location e g Garage Basement or similar heated f Boiler Condensate Pump Baxi Heating UK Ltd 2015 7 0 Site Requirements Condensate Drain cont When discharging condensate into a soil stack or waste pipe the effects of existing plumbing must be considered If soil pipes or waste pipes are subjected to internal pressure fluctuations when WC s are flushed or sinks emptied then back pressure may force water out of the boiler trap and cause appliance lockout 12 A boiler discharge pump is available MULTIFIT part no 720648301 This pump will dispose of both condensate amp high temperature water from the relief valve It has a maximum head of 5 metres Follow the instruct
50. he body and draw the head away 3 Reassemble in reverse order KAGE Pump Complete Fig 63 Drain the primary circuit and disconnect the electrical plug from the pump motor 2 Undo the two screws securing the body to the pipe and manifold and draw the pump forwards 3 Unscrew the automatic air vent from the pump body 4 Examine the OU ring seals on the return pipe and manifold replacing if necessary 5 Fit the air vent to the new pump body and reassemble in reverse order Socket Headed Screw EM Automatic Air Vent Fig 63 Drain the primary circuit and unscrew the automatic air vent from the pump body 2 Examine the O ring seal replacing if necessary and fit it Fig 62 to the new automatic air vent Pump Head 3 Reassemble in reverse order Automatic Air Vent 38 Baxi Heating UK Ltd 2015 13 0 Changing Components Gauge Retaining EALE Pressure Gauge Figs 64 amp 65 Bracket i e ae f amp AEREA Pressure Gauge Drain the primary circuit and undo the nut on the pressure gauge capillary 2 Undo the screws securing the gauge retaining bracket 3 Remove the bracket and gauge assembly Depress the barbs on the side of the gauge and remove the retaining bracket Fig 65 4 Examine the sealing washer replace if necessary 5 Reassemble in reverse order EME
51. he case front panel Tighten the securing screws 12 Having checked e That the boiler has been installed in accordance with these instructions The integrity of the flue system and the flue seals The integrity of the boiler combustion circuit and the relevant seals Proceed to put the boiler into operation as follows 13 The Combustion Check procedure as shown by the chart in 10 2 is mandatory The method of setting the boiler to operate at maximum and minimum rates to comply with the procedure is described below 14 Ensure that all external controls are calling for heat The actual current boiler temperature is shown on the display 15 Turn both control knobs Fig 36 fully anticlockwise then quickly turn the right hand knob 1 4 clockwise twice and back fully anticlockwise 6 The display will now alternate between SF and the current boiler temperature and both green LEDs will flash Fig 37 7 To set to maximum rate Turn the left hand knob fully clockwise As the knob is turned the display will change indicating the fan speed 8 The display will show 00 indicating maximum rate then revert to P alternating with the current boiler temperature 9 To set to minimum rate Turn the left hand knob fully anti clockwise As the knob is turned the display will change indicating the fan speed When the display reads 0 the boiler runs at minimum rate 20 This function is m
52. ional information BS 5546 Installation of hot water supplies for domestic purposes BS EN 12828 Heating systems in buildings BS EN 14336 Installation amp commissioning of water based heating systems BS 7074 Expansion vessels and ancillary equipment for sealed water systems BS 7593 Treatment of water in domestic hot water central heating systems Safe Manual Handling The following advice should be adhered to from when first handling the boiler to the final stages of installation and also during maintenance General Most injuries as a result of inappropriate handling and lifting are to the back but all other parts of the body are vulnerable particularly shoulders arms and hands Health amp Safety is the responsibility of EVERYONE There is no safe limit for one man each person has different capabilities The boiler should be handled and lifted by TWO PEOPLE Do not handle or lift unless you feel physically able Wear appropriate Personal Protection Equipment e g protective gloves safety footwear etc Preparation Co ordinate movements know where and when you are both going Minimise the number of times needed to move the boiler plan ahead Always ensure when handling or lifting the route is clear and unobstructed If possible avoid steps wet or slippery surfaces unlit areas etc and take special care on ladders into lofts Technique When handling or lifting always use safe techniques keep you
53. ions IMPORTANT ONLY on 40 models the Cold Water Inlet tap is fitted with a flow regulator The copper tail is factory fitted on this model but must be loosened and turned through 180 to point downwards Ensure the joint is fully tight Fig 18 2 Fit the filling loop as described in the instructions supplied with it Flushing Connect a tube to the central heating flow or return pipe Fig 19 2 Flush thoroughly see System Details Section 6 2 23 Remove Sealing Caps from under the Boiler after lifting into position Fig 20 Lift Bo Bottom Po Sealing ty Washers Here h Sides lystyrene When the Boiler Mounting Bracket on the Boiler is in position on the Retaining Lugs the bottom polystyrene may be discarded allowing the boiler to swing into position Safety Pressure Relief Valve Fig 21 Discharge Pipe 24 Baxi Heating UK Ltd 2015 9 0 Installation Fitting The Boiler Fig 20 Remove the sealing caps from the boiler connections NOTE A small amount of water may drain from the boiler once the caps are removed 2 Lift the boiler as indicated by the shaded areas and the bottom polystyrene The boiler should be lifted by TWO PEOPLE Engage the slots at the top rear of the boiler on the wall plate see Safe Manual Han
54. ions supplied with the pump 13 Condensate Drain Pipe Trace Heating Elements are available in various lengths MULTIFIT part nos metre 720644401 2 metre 720664101 3 metre 720664201 5 metre 72066440 1 Where the drain is between 3 amp 5 metres a 5 metre kit can be used and doubled back upon itself 14 It is possible to fit the element externally on the condensate drain or internally as detailed in the instructions provided 15 The fitting of a Trace Heating Element is NOT a substitute for correct installation of the condensate drain ALL requirements in this section must still be adhered to vii to a drain or gully with extended external run amp trace heating The Trace Heating element must be installed in accordance with the instructions supplied External runs amp those in unheated locations still require insulation Pipe must terminate above water level but below surrounding surface Cut end at 45 Terminal Position with Minimum Distance Fig 12 Al Directly below an opening air brick opening 7 0 Site Requirements windows etc 300 B Above an opening air brick opening window etc 300 C Horizontally to an opening air brick opening window etc 300 D2 Below gutters soil pipes or drain pipes 25 75 a Gees E 25 209 NOTE Due to the nature of the boiler a plume of water elow balconies or car port roof 25 200
55. ler is cold 4 The preferred minimum gas pressure is 20 mbar 5 Carry out electrical system checks i e Earth Continuity Resistance to Earth Short Circuit and Polarity with a suitable meter NOTE These checks must be repeated after any servicing or fault finding 6 Ensure all external controls are calling for heat and check all external and internal fuses Before any servicing or replacement of parts ensure the gas and electrical supplies are isolated 17 2 Error Codes Ifa fault occurs on the boiler an error code may be shown by the facia display 2 The codes are either two or three digit preceded by the etter E For example code EI 33 will be displayed by EI alternating with 33 E50 is shown as E then 50 E20 E28 amp E50 indicate faulty components EI 10 shows overheat of the primary water and E130 overheat of the flue system E119 is displayed when the primary water pressure is less han 0 5 bar 33 indicates that the gas supply has been interrupted ignition has failed or the flame has not been detected E125 is displayed in either of two situations i If within 15 seconds of the burner lighting the boiler emperature has not changed by 1 ii If within 10 minutes of the burner lighting the boiler emperature twice exceeds the selected temperature by 30 n these instances poor primary circulation is indicated 3 By turning the selector switch to the Reset position
56. ler must be installed with one of the purpose designed flues such as the standard horizontal telescopic flue kit part no 7205987 01 9 All systems must be thoroughly flushed and treated with inhibitor see section 6 2 Important If the boiler is installed at a high point in the system it is strongly recommended that Automatic Air Vent Kit 72000470 is fitted Optional Extras Integral timers RF room thermostats etc are available as optional extras Contents of Pack The pack contains Boiler e Wall Plate including taps e Set of Pipe Connections e Template amp Quick Fit Guide e Literature Pack e Filling Loop Baxi Heating UK Ltd 2015 H un LO bal EL gt OO x A 5 3 O E 5 5 O LI Es 2 OO a U E Dn E E a c o E 35 FH C Re Oo amp O0 a v D v 2 U E 00 E P U C E ZS E o Lol Dp o Si 2 gt S 2 g 5 me CO 5 00 D B gt U E X o 2 g 2 P v g 2 A 5 8 E SS O S S a Se S 3 S 9 2 S otf x uz S 4 Be PF eos BF L med 2 Ps S PE Z q co SE R x 9 EL Da ZS DS E 2 c a R O EZ oO a gt 0 o 2 o CH Ss u e d oO om 0 2 a a p E o oO c 0 Le GN S 2 E 5 amp TZ O D 2 8 TI Se O 6 O ZE amp o 2 8 ZC SO E Ss Ggs E E E a zs Ze 8 gt 5 SS e sg Ge a 5 OO oe Gg 5 D amp G om H 9 8 0 336 4 H S m E D ZZ H ez dg a fe
57. mer s statutory rights Customer name Telephone number Address Boiler make and model Boiler serial number Commissioned by PRINT NAME Gas Safe register number Company name Telephone number Company address Commissioning date To be completed by the customer on receipt of a Building Regulations Compliance Certificate Building Regulations Notification Number if applicable CONTROLS tick the appropriate boxes Room thermostat and programmer timer Programmable room thermostat Time and temperature control to heating Load weather compensation Optimum start control Time and temperature control to hot water Cylinder thermostat and programmer timer Combination Boiler Heating zone valves Fitted Not required Hot water zone valves Fitted Not required Thermostatic radiator valves Fitted Not required Automatic bypass to system Fitted Not required Boiler interlock Provided ALL SYSTEMS The system has been flushed and cleaned in accordance with BS7593 and boiler manufacturer s instructions What system cleaner was used What inhibitor was used Quantity Has a primary water system filter been installed CENTRAL HEATING MODE measure and record Gas rate OR Burner operating pressure if applicable OR Gas inlet pressure Central heati
58. mp Available Head See graph below Expansion Vessel For Central Heating only Integral with appliance bar Min Pre charge Pressure 0 5 24 amp 28 33 amp 40 litre litre Max Capacity of CH System 125 125 For greater system capacities an additional expansion vessel MUST be fitted Primary Water Content of Boiler unpressurised 2 5 2 8 Temperatures CH Flow Temp adjustable 25 C to 80 C max 5 C D H W Flow Temp adjustable 35 C to 60 C max 5 C dependent upon flow rate 200 400 600 800 1000 1200 Flow Rate h 4 0 Technical Data Technical Parameters Technical parameters for boiler combination heaters Baxi Duo tec Combi ErP Fr Condensing boiler Low temperature boiler B1 boiler Cogeneration space heater fF Combination heater P Rated heat output Useful heat output at rated heat output and high temperature regime Useful heat output at 30 of rated heat P output and low temperature regime No 9 OO N N e t i 10 6 3 9 Seasonal space heating energy efficiency Useful efficiency at rated heat output and 74 87 9 high temperature regime Useful efficiency at 30 of rated heat ie k Y e Y Y Ye 7 9 9 9 6 output and low temperature regime Auxiliary electricity consumption Full load P4 S 1 Standby mode o Other items Q w wi elmax 0 042 0 043 0 049 0 034 0 016 0 016 0 017 0 018 N N 2
59. ms 145m Tube 100mm Tap Rail 132 5 TO CoPi l Condensate l Drain l l l l l l l 65 mm 65 mm 65 mm 65 mm 65 mm Heating Domestic Hot Gas Cold Water Heating Pressure Relief Flow Water Outlet Inlet Inlet Return Valve 22mm 15mm 22mm 15mm 22mm 15mm bm 4 G fta m Sa 2 Baxi Heating UK Ltd 2015 6 0 System Details t l Information The Baxi Duo tec Combi Condensing Combination Boiler is a Water Byelaws Scheme Approved Product To comply with the Water Byelaws your attention is drawn to the following installation requirements and notes IRN a IRN OOI See text of entry for installation requirements and notes b IRN 302 Byelaw 14 2 Reference to the WRc publications Water fittings and materials directory and Water supply byelaws guide give full details of byelaws and the IRNs Central Heating Circuit The appliance is suitable for fully pumped SEALED SYSTEMS ONLY Treatment of Water Circulating Systems e All recirculatory water systems will be subject to corrosion unless an appropriate water treatment is applied This means that the efficiency of the system will deteriorate as corrosion sludge accumulates within the system risking damage to pump and valves boiler noise and circulation problems e When fitting new systems flux will be evident within the s
60. ner ignites the fan speed controls the gas rate to maintain the heating temperature measured by the temperature sensor 3 When the flow temperature exceeds the setting temperature a 3 minute delay occurs before the burner relights automatically anti cycling The pump continues to run during this period 4 When the demand is satisfied the burner is extinguished and the pump continues to run for a period of 3 minutes Pump Overrun Domestic Hot Water Mode Fig 3 Priority is given to the domestic hot water supply A demand at a tap or shower will override any central heating requirement 2 The flow of water will operate the Hall Effect Sensor which requests the 3 way valve to change position This will allow the pump to circulate the primary water through the DHW plate heat exchanger 3 The burner will light automatically and the temperature of the domestic hot water is controlled by the temperature sensor 4 When the domestic hot water demand ceases the burner will extinguish and the diverter valve will remain in the domestic hot water mode unless there is a demand for central heating IMPORTANT When the selector switch is in the 0 Off position the electrical supply to the boiler is isolated The boiler will not operate and the integral timer will require resetting once the selector switch is set to either Position i or Position ii Domestic Hot Water Circuit QUT
61. ng flow temperature Central heating return temperature COMBINATION BOILERS ONLY Is the installation in a hard water area above 200ppm If yes and if required by the manufacturer has a water scale reducer been fitted What type of scale reducer has been fitted DOMESTIC HOT WATER MODE Measure and Record Gas rate OR Burner operating pressure at maximum rate OR Gas inlet pressure at maximum rate Cold water inlet temperature Hot water has been checked at all outlets Yes Temperature Water flow rate CONDENSING BOILERS ONLY The condensate drain has been installed in accordance with the manufacturer s instructions and or BS5546 BS6798 ALL INSTALLATIONS At max rate CO ppm CO CO Record the following 3 At min rate where possible CO ppm CO CO The heating and hot water system complies with the appropriate Building Regulations The boiler and associated products have been installed and commissioned in accordance with the manufacturer s instructions The operation of the boiler and system controls have been demonstrated to and understood by the customer The manufacturer s literature including Benchmark Checklist and Service Record has been explained and left with the customer Commissioning Engineer s Signature Customer s Signature To confirm satisfactory demonstration and receipt of manufacturer s literat
62. nsulted and an assessment performed as described 2 Follow the procedure on the carton to unpack the boiler or see Fig 15 3 If pre plumbing Fig 16 the wall jig and fitting kit can be removed without removing the carton sleeve Simply slide banding to the edge and open the perforated flap lift out he jig fitting kit and instructions If the boiler is to be installed at a later date close the flap and reposition the banding straps the boiler can now be stored safely away 4 After considering the site requirements see Section 7 0 position the fixing template on the wall ensuring it is level both horizontally and vertically 5 Mark the position of the two most suitable fixing slots for the wall plate and boiler lower fixing holes It is preferable to use the vertical fixing slots 6 Mark the position of the centre of the flue hole rear exit For side flue exit mark as shown Fig 7 7 If required mark the position of the gas and water pipes Remove the template 8 Cut the hole for the flue minimum diameter 6mm 9 Drill the wall as previously marked to accept the wall plugs supplied Secure the wall plate using the fixing screws 10 Using a spirit level ensure that the plate is level before finally tightening the screws Connect the gas and water pipes to the valves on the wall plate using the copper tails supplied Ensure that the sealing washers are fitted between the connect
63. odel 28 model 33 model 40 model Max Min kW 20 6 8 kW 24 8 7 kW 28 94 kW 32 9 6 Max Min kW 21 0 74 kW 25 9 95 kW 30 3 10 2 kW 34 4 12 1 Heat Input DHW Qnw Hs Gross Power Consumption 24 85w 28 120w 33 125w 40 Electrical Protection External Fuse Rating Internal Fuse Rating 125w IPXOD with timer IPX5D without timer 3A F2L ae Condensate Drain To accept 21 5mm Di in plastic waste pipe Central Heating Primary Circuit Max 24 mode kW 274 28 mode kW 32 1 33 mode kW 37 8 40 mode kW 45 7 Heat Output DHW Max 24 mode W 24 0 28 mode W 28 0 33 mode W 33 0 40 mode W 40 0 Max Gas Rate Natural Gas G20 After 10 mins 24 mode m3 h 2 61 28 mode m h 3 1 33 mode m h 3 6 40 mode m h 4 36 NO Class 5 Flue Terminal Diameter 100mm Dimensions Projection 125mm Connections copper tails Gas Supply 22mm Central Heating Flow 22mm Central Heating Return 22mm Cold Water Mains Inlet 15mm DHW Flow 5mm Pressure Relief Discharge 5mm Outercase Dimensions Casing Height 780mm Overall Height Inc Flue Elbow 965mm Casing Width 450mm Casing Depth 345mm Clearances Above Casing 175 mm Min Below Casing 150 mm Min Front Front Side Side KE E 450 mm Min For Servicing 5 mm Min In Operation 5 mm Min 5 mm Min In Operation Product Characteristics Da
64. plete electrical isolation of the appliance Connection may be via a fused double pole isolator with a contact separation of at least 3mm in all poles and servicing the boiler and system controls only Bath amp Shower Rooms If the boiler is fitted in a room containing a bath or shower and NOT FITTED with any optional integral timer or thermostat it can be fitted in zone 2 Figs A amp B shows zone dimensions for a bathtub For other examples refer to the Current LEE Wiring Regulations reference must be made to the relevant requirements In GB this is the current LEE Wiring Regulations and Building Regulations In IE reference should be made to the current edition of l S 813 Domestic Gas Installations and the current ETCI rules Examples are shown of the following methods of termination i to an internal soil amp vent pipe 7 0 Site Requirements ii via an internal discharge branch e g sink waste downstream of the trap ii to a drain or gully iv to a purpose made soakaway Condensate Drain v pumped into an internal discharge branch e g sink waste downstream of the trap vi pumped into an external soil amp vent pipe FAILURE TO INSTALL THE CONDENSATE vil to a drain or gully with extended external run amp trace heating DISCHARGE PIPEWORK CORRECTLY WILL AFFECT THE RELIABLE OPERATION OF THE BOILER CAREFUL CONSIDERATION MUST BE GIVEN TO THE drainage system If conn
65. r back straight bend your knees Don t twist move your feet avoid bending forwards and sideways and keep the load as close to your body as possible Where possible transport the boiler using a sack truck or other suitable trolley Always grip the boiler firmly and before lifting feel where the weight is concentrated to establish the centre of gravity repositioning yourself as necessary See the Installation section of these instructions for recommended lift points Remember The circumstances of each installation are different Always assess the risks associated with handling and lifting according to the individual conditions If at any time when installing the boiler you feel that you may have injured yourself STOP DO NOT work through the pain you may cause further injury IF INANY DOUBT DO NOT HANDLE OR LIFT THE BOILER OBTAIN ADVICE OR ASSISTANCE BEFORE PROCEEDING Baxi Heating UK Ltd 2015 5 CONTENTS Section Page 1 0 Introduction 7 2 0 General Layout 8 Si 3 0 Appliance Operation 9 4 0 Technical Data 0 5 0 Dimensions and Fixings 6 0 System Details 2 7 0 Site Requirements 5 8 0 Flue Options 21 9 0 Installation 23 10 0 Commissioning 28 11 0 Completion 31 12 0 Servicing 32 13 0 Changing Components 34 14 0 Setting the Gas Valve 43 15 0 Electrical 44 16 0 Short Parts List 45 17 0 Fault Finding 46 18 0 LPG Model
66. rame ground or above a flat roof to which people have access then a suitable terminal guard must be provided 2 Only ONE 25mm clearance is allowed per installation If one of the dimensions 4 Reduction to the boundary is possible down to 25mm D E F G or H is 25mm then the remainder MUST be as shown in brackets in but the flue deflector kit part no 5111068 must be fitted accordance with B S 5440 1 NOTE The distance from a fanned draught appliance terminal IMPORTANT installed parallel to a boundary may not be less than 300mm in Under car ports we recommend the use of the plume accordance with the diagram below displacement kit e The terminal position must ensure the safe and 300 min lt Terminal KR nuisance free dispersal of combustion products Assembly So I Plume Displacement Kit IMPORTANT If fitting a Plume I I Li I T 1 T O i S Displacement Flue Kit the air inlet KW e must be a minimum of 150mm from l l I I l l I any opening windows or doors Top View Rear Flue es 8 Fig 11 VV i Property Boundary Line sus Gr Lt Opening Window or Door 150mm Fig 12a SL MI Likely
67. rature boilers the display will change indicating the fan speed When the 37 C and for other heaters 50 C return temperature at heater inlet 2 High temperature regime means 60 C return temperature at heater inlet and 80 C feed temperature at heater outlet display reads 0 the boiler runs at minimum rate The CO should be 9 8 0 2 See The back cover for contact details 16 0 Short Parts List Product Characteristics Database Short Parts List SEDBUK Key Description Manufacturers No Part No SAP 2009 Annual Efficiency 2 E O 28 LPG 90 6 503 PCB 28 LPG 720043701 This value is used in the UK Government s Standard Assessment Procedure SAP for energy rating of dwellings The test data from which it has been calculated has been certified by 0085 52 Baxi Heating UK Ltd 2015 19 0 Notes Baxi Heating UK Ltd 2015 53 GAS BOILER SYSTEM COMMISSIONING CHECKLIST This Commissioning Checklist is to be completed in full by the competent person who commissioned the boiler as a means of demonstrating compliance with the appropriate Building Regulations and then handed to the customer to keep for future reference Failure to install and commission according to the manufacturer s instructions and complete this Benchmark Commissioning Checklist will invalidate the warranty This does not affect the custo
68. rce Read the instructions fully before installing or using the appliance In GB this must be carried out by a competent person as stated in the Gas Safety Installation amp Use Regulations Definition of competence person who works for a Gas Safe registered company and holding current certificates in the relevant ACS modules is deemed competent In IE this must be carried out by a competent person as stated in l S 813 Domestic Gas Installations The addition of anything that may interfere with the normal operation of the appliance without express written permission from the manufacturer or his agent could invalidate the appliance warranty In GB this could also infringe the Gas Safety Installation and Use Regulations Warning Check the information on the data plate is compatible with local supply conditions All Gas Safe registered engineers carry an ID card with their licence number and a photograph You can check your engineer is registered by telephoning 0800 408 5500 or online at www gassaferegister co uk The boiler meets the requirements of Statutory Instrument The Boiler Efficiency Regulations 1993 N 3083 and is deemed to meet the requirements of Directive 92 42 EEC on the energy efficiency requirements for new hot water boilers fired with iquid or gaseous fuels Type test for purpose of Regulation 5 certified by otified Body 0085 Product Production certified by otified Bodies 0085 amp 0086
69. rect operation for system capacities up to 25 litres For greater system capacities an additional expansion vessel MUST be fitted For GB refer to BS 7074 Pt For IE the current edition of l S 813 Domestic Gas Installations Safety Pressure Relief Valve Fig 6 The pressure relief valve is set at 3 bar therefore all pipework fittings etc should be suitable for pressures in excess of 3 bar and temperature in excess of 100 C 2 The pressure relief discharge pipe should be not less than 5mm dia run continuously downward and discharge outside the building preferably over a drain It should be routed in such a manner that no hazard occurs to occupants or causes damage to wiring or electrical components The end of the pipe should terminate facing down and towards the wall 3 The discharge must not be above a window entrance or other public access Consideration must be given to the possibility that boiling water steam could discharge from the Fig 6 pipe Pressure Relief Valve 4 A remote relief valve kit is available to enable the boiler to Discharge Pipe be installed in cellars or similar locations below outside ground level kit no 5121379 14 Baxi Heating UK Ltd 2015 Fig 7 Other Tap Outlets Boiler Expansion Vessel Pressure Reducer Valve To Hot aps See 6 8 for instances when these ttems may be
70. ring tabs are clear of the facia Remove the panel 2 Completely undo the screws securing the facia panel and hinge it down Fig 30 3 Undo the terminal block cover securing screw and remove the cover Fig 30 4 Slacken the unused cable clamp on the LH side of the boiler chassis Fig 31 Insert the external control wiring through the clamp and route it to the terminal block 5 Refer to the instructions supplied with the control IMPORTANT The room thermostat MUST be suitable for 230V switching NOTE An external frost thermostat cannot be used with the optional integral timer 6 Remove the link between terminals amp 2 The 230V supply at terminal 2 must be connected to the thermostat The switched output from the thermostat must be connected to terminal Figs 32 amp 33 If the room thermostat being used incorporates an anticipator it MUST be wired as shown in Figs 32 amp 33 7 Ensure that the external control input cable s have sufficient slack to allow the control box to drop down Tighten the cable clamp on the boiler chassis 8 Replace the terminal block cover routing the external control input cable s through the second cut out 98 Preliminary Electrical Checks Prior to commissioning the boiler preliminary electrical system checks should be carried out 2 These should be performed using a suitable meter and include checks for Earth Continuity Resistance to Earth
71. s after 5 seconds Reduce DHW flow rate NO Burner modulates Error 130 flashing Go to section hl Fan stops after 10 seconds Go to section B YES YES Is mains water filter and assembly clean and the magnetic detector free to move in the Hall Effect sensor Have the checks in section G been passed satisfactorily Go to section H Turn the selector switch to the reset position for 5 seconds YES Error 33 flashing Go to section l YES Clean DHW NTC sensor and DHW heat exchanger YES i Pump runs for 30 seconds Operation sequence successful 17 0 Fault Finding Fault Finding Solutions Sections A Is there 230V at Main terminals L and N ES 2 NO NO Eed Check electrical supply Replace fuse Check wiring Display illuminated Replace PCB PCB XI connector terminals 2 NO Dr B oem Replace Pump PCB YES Replace Pump CH system pressure less than 0 5 bar ute Check connection water pressure switch terminal YES Replace water COM NO and PCB connector m pressure switch X400 terminals 3 4 2 ic ai NO E Check the tap of the automatic air Open the automatic air vent vent is opened D Fan connections correct at fan PCB X2 connector is 230V AC across Fan jammed or faulty winding terminals 3 amp 4 YES Replace fan Replace PCB Baxi Heating UK Ltd 2015 49 17 0 F
72. s inserted into the manifold it is parallel and pushed fully in 6 When fitting the new heat exchanger note that the left hand location stud is offset towards the centre more than the right hand one 7 Reassemble in reverse order EP Diverter Valve Motor Unit amp Assembly Fig 69 To replace the motor unit disconnect the multi pin plug 2 Pull off the retaining clip and remove the motor unit Motor Unit 3 The motor unit can now be replaced or the valve assembly removed Multi pin Plug Retaining Clip 4 Drain the primary circuit and draw off any hot water once the isolating taps are closed 5 Undo the nuts on the tap rail under the boiler Remove the screws securing the valve assembly to the boiler bottom HE panel and plate heat exchanger 6 Remove the valve assembly Examine any seals or washers replacing if necessary Transfer the DHW NTC to the new valve and reassemble in reverse order Pressure Sensor 40 Baxi Heating UK Ltd 2015 13 0 Changing Components EI P C B Figs 70 amp 71 Note the settings of the temperature control knobs rotate them fully anticlockwise and carefully pull them off the drive pins 2 Completely undo the screws securing the control box cover and release the cover retaining barbs from their slots 3 Note the position of all plugs and wires on the P C B and disconnect them 4 Undo the securing screws
73. s leaflet All goods are sold subject to our standard Conditions of Sale which are available on request 7219665 OI 04 15 CE 0086 ele Ce zz BAXI
74. should be more than 0 5 u A J Overheat thermostat operated or Allow to cool Continuity faulty i e continuity across across thermostat terminals thermostat terminals more than 1 5 ohm YES Replace safety thermostat Replace PCB K Is there 230V at YES Motor 3 way valve Replace motor 3 way valve 2 PCB X3 connector terminals 5 amp 6 central heating mode Replace PCB 5 amp 7 domestic hot water mode Change pump supply cable Fan connections correct at fan YES Replace fi PCB X401 connector terminals 5 6 7 amp 8 l Temperature sensors faulty Cold resistance approximately OO 25 C CH sensor 20kQ 25 C Flue sensor resistance reduces with increase in temp YES If pump is running the heat exchanger could be ee obstructed Baxi Heating UK Ltd 2015 51 18 0 LPG Model Supplement Technical parameters for boiler combination heaters Baxi Duo tec Combi ErP 28 LPG Duo tec 28 LPG Combi ErP Condensing boiler Yes SES ES aa Low temperature boiler No E ts B1 boiler No Appliance Type Ci3 C33 Cs3 Cogeneration space heater No Appliance Category CAT Il 2H 3p Combination heater Heat Input CH Qn Hs Gross Rated heat output 24 Max Min Useful heat output at rated heat output P4 kW 28 model kw 27 4 0 and high temperature regime Useful heat output at 30 of rated heat P kW output and low temperature regime 5 28 mod
75. tabase SEDBUK SAP 2009 Annual Efficiency 248 amp 28 88 6 33 amp 40 88 5 This value is used in the UK Government s Standard Assessment Procedure SAP for energy rating of dwellings The test data from which it has been calculated has been certified by 0085 NOTE All data in this section are nominal values and subject to normal production tolerances 10 Baxi Heating UK Ltd 2015 This is MINIMUM recommended dimension Greater clearance will aid installation and maintenance Weights Packaged Boi ler Cart Installation Lif Packaged Boi Weigl ler Cart Installation Lif Packaged Boi Weigl ler Cart Installation Lif Weigl 24 amp 28 model on 46 0 kg ht 402 kg 33 model on 475 kg ht 41 7 kg 40 model on 48 0 kg ht 422 kg Metre wg Pressures bar Safety Discharge 3 ax Operating 25 in Operating 0 5 Recommended Operating Range 1 2 DHW Circuit bar Pressures ax Operating 8 in Operating 0 15 Flow Rates 24 28 33 40 Wenn l min l min l min DHW Flow Rate 30 CRise 1143 133 157 19 1 DHW Flow Rate 35 CRise 9 8 11 5 135 164 Min Working DHW Flow Rate 2 2 2 2 IMPORTANT Where Low Flow Taps or Fittings are intended to be used in the DHW system connected it is strongly recommended that the DHW flow rate DOES NOT fall below 2 5l min This will ensure reliable operation of the DHW function Pu
76. tent Persons Scheme A Building Regulations Compliance Certificate will then be issued to the customer pes THE MARK OF QUALITY FOR THE INSTALLATION COMMISSIONING AND SERVICING OF DOMESTIC HEATING AND HOT WATER SYSTEMS Heating and Hotwater Industry Council HHIC www centralheating co uk Baxi Customer Support 0344 871 1525 Opening hours Monday Friday 8 00am 6 00pm Weekends and Bank Holidays 8 30am 2 00pm Please note calls may be recorded for training and monitoring purposes baxi co uk Register now to activate your warranty www baxi co uk registration For the warranty to be maintained please make sure H Benchmark checklist is completed H Warranty is registered with Baxi H The boiler has an annual service For full terms and conditions visit www baxi co uk terms Failure to adhere to terms and conditions will void your manufacturer s warranty SE Baxi Ss Brooks House Coventry Road Warwick CV34 4LL benchmar THE MARK OF QUALITY FOR THE INSTALLATION COMMISSIONING AND SERVICING OF DOMESTIC HEATING AND HOT WATER SYSTEMS Please ensure the boiler is installed in accordance with these installation instructions and that you adhere to the Building Regulations e amp 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 thi
77. ure All installations in England and Wales must be notified to Local Authority Building Control LABC either directly or through a Z em Amar COLLECTIVE MARK Competent Persons Scheme A Building Regulations Compliance Certificate will then be issued to the customer THE MARK OF QUALITY FOR THE INSTALLATION COMMISSIONING AND SERVICING OF DOMESTIC HEATING AND HOT WATER SYSTEMS 54 Heating and Hotwater Industry Council HHIC www centralheating co uk SERVICE RECORD It is recommended that your heating system is serviced regularly and that the appropriate Service Interval Record is completed Service Provider Before completing the appropriate Service Record below please ensure you have carried out the service as described in the manufacturer s instructions Always use the manufacturer s specified spare part when replacing controls SERVICE 01 SERVICE 02 Engineer name Engineer name Company name Company name Telephone No Telephone No Gas safe register No Gas safe register No At max rate AND CO2 Record At max rate Record At min rate Where Possible Comme At min rate Where Possible AND CO Signature SERVICE 03 SERVICE 04 Engineer name Engineer name Company name Company name Telephone No Telephone No Gas safe register No Gas safe register No At max rate Record
78. y in clean water Reassemble and check the flow If required clean the restrictor filter as described below 7 Pull off the hall effect sensor Undo the restrictor from the inlet return manifold SC ipe 8 Rinse the filter thoroughly in clean water and reassemble Fig 49 in reverse order 9 Turn the selector switch fully anticlockwise against the ge Effect spring pressure to the reset position and hold for 5 seconds ensor to reset the boiler 20 Complete the relevant Service Interval Record section of Blanking Cold Water Cap Inlet Tap the Benchmark Commissioning Checklist at the rear of this publication and then hand it back to the user Restrictor not on 40 models Hydraulic Inlet m2 Assembly 7 x Baxi Heating UK Ltd 2015 33 13 0 Changing Components IMPORTANT When changing components ensure that both the gas and electrical supplies to the boiler are Bracket he we isolated before any work is started When the component has been changed turn the selector switch fully anticlockwise against the spring pressure to the Igniter vc reset position and hold for 5 seconds to reset the boiler before recommissioning Igniter Feed Plug See Section 12 2 Annual Servicing for removal of case panel door etc ei Igniter Fig 52 Electrode e Leads Disconnect the igniter feed plug and the electrode leads i noting their positions Fig 52 2 Undo the screw
79. ystem which can lead to damage of system components e All systems must be thoroughly drained and flushed out using for example Sentinel X300 or X400 or Fernox F3 They should be used following the flushing agent manufacturer s instructions e System additives corrosion inhibitors and flushing agents descalers should comply to BS7593 requirements e g Sentinel X100 and Fernox MB which should be used following the inhibitor manufacturer s instructions e Full instructions are supplied with the products for further information contact Sentinel 0800 389 4670 or Fernox 0870 870 0362 Failure to flush and add inhibitor to the system will invalidate the appliance warranty e It is important to check the inhibitor concentration after installation system modification and at every service in accordance with the manufacturer s instructions Test kits are available from inhibitor stockists e For information or advice regarding any of the above contact Baxi Customer Support 0344 871 1525 Bypass The boiler utilises the primary side of the DHW plate heat exchanger as an automatic integral bypass System Control The boiler is designed for use in a heating system that incorporates external controls i e a minimum of a timer device 2 Suitable timer kits are available as optional extras 3 For optimum operating conditions and maximum economy the fitting of a programmable room thermostat is recommended

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