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Main Combi 25 Eco Elite Installation & Service Manual
Summary of Combi 25 Eco Elite
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M main eco elite combi installation & service manual condensing central heating boiler 25 - 30 en united kingdom these instructions include the benchmark commissioning checklist and should be left with the user for safw keeping..
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2 © baxi heating uk ltd 2015 natural gas main eco elite 25 combi erp g.C.N o 47 467 12 main eco elite 30 combi erp g.C.N o 47 467 13 building regulations and the benchmark commissioning checklist building regulations (england & wales) require notification of the installation of a heating appliance t...
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3 installer notification guidelines © baxi heating uk ltd 2015 choose building regulations notification route contact your relevant local authority building control (labc) who will arrange an inspection or contact a government approved inspector labc will record the data and will issue a certificate...
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4 legislation © baxi heating uk ltd 2015 codes of practice - refer to the most recent version important - installation, commissioning, service & repair this appliance must be installed in accordance with the manufacturer’s instructions and the regulations in force. Read the instructions fully before...
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5 safe manual handling © baxi heating uk ltd 2015 general the following advice should be adhered to, from when first handling the boiler to the final stages of installation, and also during maintenance. Most injuries as a result of inappropriate handling and lifting are to the back, but all other pa...
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6 © baxi heating uk ltd 2015 contents 1.0 introduction 7 2.0 general layout 8 3.0 appliance operation 9 4.0 technical data 10 5.0 dimensions and fixings 12 6.0 system details 13 7.0 site requirements 16 8.0 flue options 21 9.0 installation 23 10.0 commissioning 28 11.0 completion 31 12.0 servicing 3...
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7 1.0 introduction © baxi heating uk ltd 2015 1.1 description 1. The main eco elite 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 max...
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8 2.0 general layout © baxi heating uk ltd 2015 2.1 layout 1. Expansion vessel 2. Automatic air vent 3. Dhw plate heat exchanger 4. Circulation pump 5. Drain off point 6. Pressure relief valve 7. Selector switch 8. Central heating system pressure gauge 9. Pcb 10. Control box 11. 3-way valve assembly...
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9 3.0 appliance operation © baxi heating uk ltd 2015 3.1 central heating mode (fig. 2) 1. With a demand for heating, the pump circulates water through the primary circuit. 2. Once main burner ignites the fan speed controls the gas rate to maintain the heating temperature measured by the temperature ...
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10 4.0 technical data © baxi heating uk ltd 2015 4.1 main eco elite 25 & 30 combi erp flue terminal diameter 100mm dimensions projection 125mm outercase dimensions casing height - 780mm overall height inc flue elbow - 965mm casing width - 450mm casing depth - 345mm weights 25 & 30 packaged boiler ca...
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11 4.0 technical data © baxi heating uk ltd 2015 technical parameters for boiler combination heaters condensing boiler 25 main eco elite combi erp rated heat output seasonal space heating energy efficiency auxiliary electricity consumption other items 30 low-temperature boiler (1) b1 boiler cogenera...
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12 5.0 dimensions and fixings © baxi heating uk ltd 2015 dimensions a 780mm b 345mm c 450mm d 116mm Ø min. F 145mm g 106mm 210mm (80/125) h 225mm domestic hot water outlet (15mm) cold water inlet (15mm) heating return (22mm) heating flow (22mm) pressure relief valve (15mm) gas inlet (22mm) 65 mm 65 ...
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13 6.0 system details © baxi heating uk ltd 2015 6.1 information 1. The main eco elite 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 001 -...
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14 6.0 system details © baxi heating uk ltd 2015 6.5 system filling and pressurising (fig. 4) 1. 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. 2. A filling lo...
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15 6.0 system details © baxi heating uk ltd 2015 boiler other tap outlets expansion vessel* to hot taps check valve* pressure reducer valve* stop tap fig. 7 6.8 domestic hot water circuit (fig. 7) 1. All dhw circuits, connections, fittings, etc. Should be fully in accordance with relevant standards ...
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16 7.0 site requirements © baxi heating uk ltd 2015 7.1 location 1. The boiler may be fitted to any suitable wall with the flue passing through an outside wall or roof and discharging to atmosphere in a position permitting satisfactory removal of combustion products and providing an adequate air sup...
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17 7.0 site requirement © baxi heating uk ltd 2015 7.3 ventilation of compartments 1. 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 with...
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18 © baxi heating uk ltd 2015 7.0 site requirements 7.7 condensate drain failure to install the condensate discharge pipework correctly will affect the reliable operation of the boiler. Careful consideration must be given to the possibility of the pipework being subject to freezing conditions and ap...
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19 © baxi heating uk ltd 2015 7.0 site requirements 7.7 condensate drain (cont.) 12. A boiler discharge pump is available, ‘multifit’ part no. 720648301. This pump will dispose of both condensate & high temperature water from the relief valve. It has a maximum head of 5 metres. Follow the instructio...
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20 7.0 site requirements © baxi heating uk ltd 2015 7.8 flue (figs. 13 & 14) note: due to the nature of the boiler a plume of water vapour will be discharged from the flue. This should be taken into account when siting the flue terminal. 1. The following guidelines indicate the general requirements ...
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21 8.0 flue options © baxi heating uk ltd 2015 horizontal flues y x plume displacement kit 60 /100 Ø 1m extensions, 45° & 93° elbows are also available - see section 9.0 note: horizontal flue pipes should always be installed with at least a 1.5° fall from the terminal to allow condensate to run back...
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22 © baxi heating uk ltd 2015 8.0 flue options fig. 15 fig. 16 315mm 500mm flue deflector 8.2 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. 15). Extensions of 250mm, 500mm & 1m are availab...
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23 © baxi heating uk ltd 2015 1.0 introduction 9.0 installation 9.1 unpacking & 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. 1. See secti...
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24 © baxi heating uk ltd 2015 9.0 installation 9.3 fitting the boiler (fig. 21) 1. 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. T...
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25 © baxi heating uk ltd 2015 9.0 installation fig. 22 fig. 24 315mm 500mm terminal assembly connection assembly 9.6 fitting the flue horizontal telescopic flue 1. There are two telescopic sections, the terminal assembly and the connection assembly, a roll of sealing tape and two self tapping screws...
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26 © baxi heating uk ltd 2015 9.0 installation 9.6 fitting the flue (cont) 10. Remove the flue elbow and insert the flue through the hole in the wall. 11. Refit the elbow to the boiler adaptor, ensuring that it is pushed fully in (fig. 27). 12. Two flue trims are supplied, one for internal use, the ...
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27 © baxi heating uk ltd 2015 9.0 installation fig. 32 fig. 31 cable clamp facia panel terminal block cover b br bk bk g/y 1 n l 2 n n l room ‘stat fused spur 230v fig. 33 b br bk bk g/y 1 n l frost thermostat external clock 2 n n l room ‘stat fused spur 230v 230v note: the 230v switched signal for ...
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28 © baxi heating uk ltd 2015 10.0 commissioning 10.1 commissioning the boiler 1. Reference should be made to bs:en 12828 & 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 ma...
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29 © baxi heating uk ltd 2015 10.0 commissioning set boiler to maximum rate (see 10.1.11) allow the combustion to stabilise. Do not insert probe to avoid ‘flooding’ the analyser. Perform flue integrity combustion check insert the analyser probe into the air inlet test point, allowing the reading to ...
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30 © baxi heating uk ltd 2015 10.0 commissioning 10.3 check the operational (working) gas inlet pressure 1. Ensure that all controls are calling for heat, and the selector switch is in the central heating and hot water position ( ). The current boiler temperature is shown on the display. 2. It is ne...
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31 © baxi heating uk ltd 2015 11.0 completion 11.1 completion 1. Instruct the user in the operation of the boiler and system including the integral timer, explaining the operational sequence. 2. Set the central heating and hot water temperature control knobs to the requirements of the user. 3. Caref...
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32 © baxi heating uk ltd 2015 12.0 servicing case front panel fig. 46 facia panel securing screws fig. 47 inner door panel condensate trap sump 12 .1 annual servicing 1. For reasons of safety and economy, it is recommended that the boiler is serviced annually. Servicing must be performed by a compet...
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33 © baxi heating uk ltd 2015 12.0 servicing 12.2 annual servicing - inspection (cont) 6. Undo the nut on the gas pipe at the gas/air inlet (fig. 49) and the gas valve. Remove the pipe, taking care not to lose the sealing washers. Also remove the injector. 7. Disconnect the electrode lead caps, remo...
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34 © baxi heating uk ltd 2015 13.0 changing components important: when changing components ensure that both the gas and electrical supplies to the boiler are isolated before any work is started. When the component has been changed turn the selector switch fully anticlockwise against the spring press...
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35 © baxi heating uk ltd 2015 13.0 changing components 13.3 fan 1. Undo the nut on the gas pipe at the gas/air inlet (fig. 56) and the gas valve. Remove the pipe, taking care not to lose the sealing washers. Also remove the injector. 2. Disconnect the electrode lead caps, remove the strain relief cl...
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36 © baxi heating uk ltd 2015 13.0 changing components 13.5 burner (fig. 59) 1. Undo the nut on the gas pipe at the gas/air inlet and the gas valve. Remove the pipe, taking care not to lose the sealing washers. Also remove the injector. 2. Disconnect the electrode lead caps, remove the strain relief...
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37 © baxi heating uk ltd 2015 13.0 changing components 13.7 safety thermostat (fig. 60) 1. 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. 13.8 central he...
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38 © baxi heating uk ltd 2015 13.0 changing components 13.11 heat exchanger automatic air vent (fig. 63 ) 1. Drain the boiler primary circuit and unscrew the automatic air vent from the pump body. 2. Examine the ‘o’ ring seal, replacing if necessary, and fit it to the new automatic air vent. 3. Reas...
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39 © baxi heating uk ltd 2015 13.0 changing components 13.15 pressure gauge (figs. 66 & 67) 1. Drain the boiler 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 th...
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40 © baxi heating uk ltd 2015 13.0 changing components 13.18 plate heat exchanger (fig. 70) 1. Drain the boiler primary circuit and remove the gas valve as described in section 13.23. 2. While supporting the heat exchanger undo the screws securing it to the brass manifolds. 3. Withdraw the heat exch...
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41 © baxi heating uk ltd 2015 control box cover p.C.B. Selector switch facia selector switch knob temperature control knobs fig. 72 fig. 73 drive pins pump p.C.B. 13.0 changing components 13.20 p.C.B. (figs. 72 & 73) 1. Note the settings of the temperature control knobs, rotate them fully anticlockw...
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42 © baxi heating uk ltd 2015 13.0 changing components 13.23 gas valve (fig. 74) important: after replacing the valve the co 2 must be checked and adjusted as detailed in section 14.0 setting the gas valve. Only change the valve if a suitable calibrated combustion analyser is available, operated by ...
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43 © baxi heating uk ltd 2015 14.0 setting the gas valve 14.1 setting the gas valve (co 2 check) important: the co 2 must be only be checked and adjusted to set the valve if a suitable calibrated combustion analyser is available, operated by a competent person - see section 13.1 1. The combustion (c...
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44 © baxi heating uk ltd 2015 15.0 electrical - brown - black - blue - white br bk b w - green - green / yellow - red g g/y r control pcb x2 x9 x501 1 2 3 4 5 dhw ntc sensor central heating ntc sensor fan overheat stat x400 x401 g g b b r r b b bk br b g b br g/y br b water pressure switch spark gen...
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45 © baxi heating uk ltd 2015 16.0 short parts list short parts list key g.C. Description manufacturers no. No. Part no. 326 fan 5121447 426 motor 3 way valve 5132452 320 electrode assembly 5130293 422 gas valve 720301001 404 hall effect sensor 5114767 313 burner 5130292 419 water pressure switch 51...
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46 © baxi heating uk ltd 2015 17.0 fault finding 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. 17.1 initial fault finding checks 1. Check that...
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47 © baxi heating uk ltd 2015 17.0 fault finding refer to section 16.0 “illustrated wiring diagram” for position of terminals and components central heating - follow operational sequence (do turn selector switch to the display illuminates error 20, 28 or 50 flashing error 119 flashing burner lights ...
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48 © baxi heating uk ltd 2015 17.0 fault finding turn selector switch to the display illuminates error 20, 28 or 50 flashing error 119 flashing burner lights error 110 flashing error 133 flashing turn domestic hot water thermostat to maximum. Open dhw tap fully. Dhw hall effect sensor operated (red ...
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49 © baxi heating uk ltd 2015 17.0 fault finding fault finding solutions sections is there 230v at: main terminals l and n check electrical supply 1. No main terminal fuse replace fuse replace pcb display illuminated 2. No pcb - x1 connector terminals 1,2 check wiring 3. No no a ch system pressure l...
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50 © baxi heating uk ltd 2015 17.0 fault finding e20 or e50 - temperature sensors faulty. Cold resistance approximately 10k @ 25° c (dhw and ch sensors) 20k @ 25° c (flue sensor) (resistance reduces with increase in temp.) e28 - incorrect pcb fitted no e replace sensor or pcb (e28) gas at burner ens...
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51 © baxi heating uk ltd 2015 17.0 fault finding check and correct if necessary 1. The mechanical set of the gas valve (co2 values - see instruction) 2. Flame sensing electrode and lead connections 3. Flame sensing electrode position flame current should be more than 0.5 a replace pcb replace pcb ye...
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52 © baxi heating uk ltd 2015 18.0 notes.
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53 © baxi heating uk ltd 2015 18.0 notes.
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54 *all installations in england and wales must be to local authority building control (labc) either directly or through a competent persons scheme. A building regulations compliance will then be issued to the customer. Www.Centralheating.Co.Uk © heating and hotwater industry council (hhic) this com...
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55 www.Centralheating.Co.Uk 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 manu...
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7219660 - 01 (04/15) 0086 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 f...