Main Combi 25 Eco Elite Installation & Service Instructions Manual Download

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16.0 Electrical

- brown
- black
- blue
- white

br
bk
b
w

- green
- green / yellow
- red

g
g/y
r

Control PCB

X501

DHW
NTC Sensor

Central Heating
NTC Sensor

Fan

Gas Valve

Overheat Stat

Pump

X400

X401

g/y

Water Pressure
Switch

Spark
Generator

Ignition
Electrode

9 8 7 6 5 4 3 2 1

8 7 6 5 4 3 2 1

Hall Effect

Sensor

Diverter Valve

Integral Timer (where fitted)

Link

g/y

Mains Input

- grey

gr gr

16.1

Illustrated Wiring Diagram

Summary of Contents for Combi 25 Eco Elite

Page 1: ...Baxi Heating UK Ltd 2014 Installation Service Instructions Combi Eco Elite Range These instructions include the Benchmark Commissioning Checklist and should be left with the user for safe keeping...

Page 2: ...st 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 Buil...

Page 3: ...levant LABC You must ensure that the certificate number issued by the Gas Safe Register is written onto the Benchmark Checklist Scheme Members only Call Gas Safe Register on 0800 408 5577 or log onto...

Page 4: ...ven 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...

Page 5: ...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...

Page 6: ...Fixings 11 6 0 System Details 12 7 0 Site Requirements 15 8 0 Flue Options 20 9 0 Plume Displacement 25 10 0 Installation 29 11 0 Commissioning 34 12 0 Completion 37 13 0 Servicing 38 14 0 Changing Co...

Page 7: ...s situated on the front sloping face of the hydraulic plate It is visible when the case front panel is removed and the control box hinged down Fig 1 1a 6 The boiler model name and serial number are al...

Page 8: ...e Trap 13 Heat Exchanger Air Vent 14 Electrode Assembly 15 Primary Heat Exchanger 16 Fan Assembly 17 On Off Reset Selector Switch 18 Central Heating Temperature Control 19 Hot Water Temperature Contro...

Page 9: ...er will not operate and the integral timer will require resetting once the selector switch is set to either Position or Position 3 3 Frost Protection Mode 1 The frost protection mode is integral to th...

Page 10: ...Servicing Front 5 mm Min In Operation L H Side 5 mm Min R H Side 5 mm Min In Operation Heat Input CH Net Max Min 25 model kW 26 06 7 82 30 model kW 29 32 8 8 Heat Output CH Non Condensing Max Min 25 m...

Page 11: ...m Min F 145mm G 132mm 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 mm 65 mm 65 mm...

Page 12: ...which can lead to damage of system components 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 ag...

Page 13: ...ng only 1 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 correct operation for system capacities up to 125 litr...

Page 14: ...p 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...

Page 15: ...ant requirements In GB this is the current I E E Wiring Regulations and Building Regulations In IE reference should be made to the current edition of I S 813 Domestic Gas Installations and the current...

Page 16: ...s In IE reference should be made to the current edition of ETCI rules 2 The mains supply is 230V 50Hz fused at 3A NOTE The method of connection to the electricity supply must facilitate complete elect...

Page 17: ...with material suitable for external use 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...

Page 18: ...Heating Element is NOT a substitute for correct installation of the condensate drain ALL requirements in this section must still be adhered to Boiler vi pumped into an external soil vent pipe 2 5 Min...

Page 19: ...am below Opening Window or Door 150mm MIN IMPORTANT If fitting a Plume Displacement Flue Kit the air inlet must be a minimum of 150mm from any opening windows or doors see Section 9 0 Fig 18a Plume Di...

Page 20: ...elbow supplied with the standard horizontal telescopic flue kit is not included in any equivalent length calculations NOTE Flue length is measured from point i to ii as shown IMPORTANT All flue system...

Page 21: ...of fittings pipes Sub total Equivalent Length Value Equivalent Length Air Duct 6 5m 1m extension 135 bend 91 5 bend 1m 0 25m 0 5m 5 2 2 5 0m 0 5m 1 0m FLUE DUCT No of fittings pipes Sub total Equival...

Page 22: ...ue System 80mm diameter E Flue Extension pair 1000mm 5111087 F Flue Bend pair 90 5111072 G Flue Bend 2 pair 135 5111086 J Vertical Flue Boiler Adaptor Kit 720089801 H Vertical Flue Adaptor 5111084 W P...

Page 23: ...adaptor in the boiler adaptor making sure that it is pushed down as far as possible 2 Ensure that the air flue ducts are connected correctly and that they are adequately supported at least once every...

Page 24: ...supplied IMPORTANT If the boiler is not fitted immediately after the flue system temporary precautions must be taken to prevent rain entry into the room of installation Any precautionary measures mus...

Page 25: ...ncrease with the addition of extensions the length of either or both the 60 100 concentric and 60 exhaust 5 Standard concentric flue extension kits may be added between the boiler elbow and the termin...

Page 26: ...and any extensions or additional bends Example 1 Not Permissible If for instance a concentric length of 5 metres was required and the 60 exhaust needed to be 10 metres the graph shows that this combi...

Page 27: ...re that the concentric assembly and any extensions fall back to the boiler at an angle of at least 1 5 and that the external air inlet is to the bottom 8 Use suitable brackets to support the concentri...

Page 28: ...extension at 30mm as shown in two positions directly opposite each other Fig 36 20 Using a suitable bit e g 2mm drill through the extension and outlet Secure using two of the screws supplied 21 The r...

Page 29: ...mark as shown Fig 40 5 If required mark the position of the gas and water pipes Remove the template 6 Cut the hole for the flue minimum diameter 116mm 7 Drill the wall as previously marked to accept...

Page 30: ...pipework must be at least 15mm 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...

Page 31: ...angled at 93 degrees to ensure a fall back to the boiler 3 Measure the distance from the outside wall face to the elbow This dimension will be known as X Fig 48 4 To dimension X add 50mm This dimensi...

Page 32: ...ct boiler operation and prevent water entering the flue 11 Make good between the wall and air duct outside the building 12 Fit the flue trim if required and if necessary fit a terminal guard see Secti...

Page 33: ...e the cover Fig 55 4 Slacken the unused cable clamp on the LH side of the boiler chassis Fig 56 Insert the external control wiring through the clamp and route it to the terminal block 5 Refer to the i...

Page 34: ...nt seals Proceed to put the boiler into operation as follows 11 The Combustion Check procedure as shown by the chart in 11 2 is mandatory from April 2014 The method of setting the boiler to operate at...

Page 35: ...als that appear unsound Is CO 350ppm and CO CO2 ratio 0 004 TURN APPLIANCE OFF Call 0844 871 1555 for advice The appliance MUST NOT be commissioned until all problems are identified and resolved If co...

Page 36: ...be obtained with all other gas appliances in the property working Measure the Gas Rate 8 With any other appliances pilot lights turned OFF the gas rate can be measured It should be between 25 model 2...

Page 37: ...e 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 se...

Page 38: ...ng the requirements of BS7927 or BS EN50379 3 and be calibrated in accordance with the analyser manufacturers requirements Competence can be demonstrated by satisfactory completion of the CPA1 ACS ass...

Page 39: ...w of domestic hot water is diminished it may be necessary to clean the filter 14 Initially check the cold water inlet tap filter 15 Turn the tap off and draw off from a hot tap Undo the blanking cap a...

Page 40: ...7 1 Disconnect the igniter feed plug and the electrode leads noting their positions 2 Undo the nuts and screws securing the igniter to the boiler top panel Remove the igniter 3 Fit the new igniter and...

Page 41: ...Examine and replace the gasket if necessary 6 Remove the four nuts and separate the fan from the gas air inlet Note the position of the orifice plate and examine the gasket replacing if necessary Fig...

Page 42: ...the new burner and gasket examine the insulation and heat exchanger gasket replacing if necessary 7 Reassemble in reverse order 14 6 Insulation Fig 82 1 Undo the nut on the gas pipe at the gas air in...

Page 43: ...sor Fig 85 1 Drain the boiler primary circuit 2 Disconnect the plug from the sensor 3 Unscrew the sensor from the hydraulic outlet assembly examine the sealing washer and replace if necessary 4 Reasse...

Page 44: ...head The pump speed must be set to 3 Fig 88 4 Reassemble in reverse order 14 13 Pump Complete Fig 89 1 Drain the boiler primary circuit 2 Undo the two screws securing the body to the pipe and manifol...

Page 45: ...e electrical plug from the sensor 3 Connect the plug to the new sensor Carefully fit the new sensor to the hydraulic assembly ensuring it is fully down 14 17 Pressure Relief Valve Fig 93 1 Drain the b...

Page 46: ...and location stud is offset towards the centre more than the right hand one 7 Reassemble in reverse order 14 19 Diverter Valve Motor Unit Assembly Figs 95 96 1 To replace the motor unit disconnect the...

Page 47: ...5 Reassemble in reverse order ensuring that the temperature controllers are reset to their previous positions 14 21 Selector Switch Figs 97 98 1 Note the setting of the selector switch knob and caref...

Page 48: ...ior to final setting use a suitable hexagon key to wind out the Throttle Adjustment Screw until it is flush with the valve body then turn the screw 4 full turns clockwise Fig 99a If the boiler will no...

Page 49: ...he correct reading is obtained Fig 108 Turning clockwise will reduce the CO2 Anticlockwise will increase the CO2 9 The CO2 must then be checked at minimum rate Turn the CH temperature knob fully antic...

Page 50: ...eat Stat Pump X400 X401 g g b b r r b b bk br b g b br g y b br b br br b b b br br br b b br r bk r bk Water Pressure Switch Spark Generator Ignition Electrode 9 8 7 6 5 4 3 2 1 9 10 8 7 6 5 4 3 2 1...

Page 51: ...Assembly 5130293 422 Gas Valve 720301001 404 Hall Effect Sensor 5114767 313 Burner 5130292 419 Water Pressure Switch 5114748 400 Plate Heat Exchanger 248048 415 Pump 248042 421 NTC Sensor DHW 5114725...

Page 52: ...receded by the letter E For example code E133 will be displayed by E1 alternating with 33 E50 is shown as E then 50 E20 E28 E50 indicate faulty or incorrect components E110 shows overheat of the prima...

Page 53: ...g Go to section D Error 133 flashing Burner does not stay alights after 5 seconds Error 133 flashing Go to section I Operation sequence successful If the error 110 is still flashing Go to section J Fa...

Page 54: ...ts after 5 seconds Error 133 flashing Go to section I Operation sequence successful Turn the selector switch to reset position for 5 seconds If the error 110 is still flashing Go to section J Fan runs...

Page 55: ...nnector terminals 3 4 Replace PCB 2 NO Change pump supply cable YES B CH system pressure less than 0 5 bar Re pressurise system 1 YES Check the tap of the automatic air vent is opened Open the automat...

Page 56: ...heck and correct if necessary 1 Ignition electrode and lead 2 Electrode connection 3 Spark gap and position voltage at PCB X2 connector is 110V AC across terminals 2 5 Note from multimeter connect com...

Page 57: ...nals Allow to cool Continuity across thermostat terminals more than 1 5 ohm J L M Is there 230V at Motor 3 way valve Replace motor 3 way valve 1 YES PCB X3 connector terminals 5 6 central heating mode...

Page 58: ...ired Thermostatic radiator valves Fitted Not required Automatic bypass to system Fitted Not required Boiler interlock Provided ALL SYSTEMS s instructions Yes What system cleaner was used What inhibito...

Page 59: ...mpany name Telephone No Gas safe register No Record At max rate CO ppm AND CO At min rate Where Possible CO ppm AND CO Comments Signature SERVICE 06 Date Engineer name Company name Telephone No Gas sa...

Page 60: ...l Enquiries 0844 871 1555 Website www mainheating co uk e oe All descriptions and illustrations provided in this leaflet have been carefully prepared but we reserve the right to make changes and impro...

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