Main Combi 25 Eco Elite Installation & Service Instructions Manual

Text of Main Combi 25 Eco Elite User Guide:

• Main Combi 25 Eco Elite, © 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.

• Main Combi 25 Eco Elite, 5 Safe Manual Handling © Baxi Heating UK Ltd 2014 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 parts of the body are vulnerable, particularly shoulders, arms and hands. Health & 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 physic

• Main Combi 25 Eco Elite, 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 manufacturer’s instructions. SERVICE RECORD SERVICE 01 Date: Engineer name: Company name: Telephone No: Gas safe register No: Record: At max. rate: CO ppm AND CO ² % At min. rate: (Where Possible) CO ppm AND CO ² % Comments: Signature SERVICE 02 Date: Engineer name: Company name: Telephone No: Gas safe register No: R

• Main Combi 25 Eco Elite, 24 8.0 Flue Options © Baxi Heating UK Ltd 2014 Fig. 19 100mm 685mm 8.6 For Roof Terminals 1. In the case of a pitched roof 25 - 50 degrees, position the lead tile to replace/flash over existing roof tiling. Make an aperture in the roof suitable for the lower tube of the roof terminal and ensure the integrity of the roof cover is maintained. The adjustable plastic collar can either be positioned on the lead tile or the lower tube of the roof terminal prior to the final positioning of the vertical flue through the tile. Check the collar is correctly located to suit required roof pitch (either 25° to 38° or 37° to 50°). From inside the roof adjust the

• Main Combi 25 Eco Elite, 54 18.0 Fault Finding © Baxi Heating UK Ltd 2014 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 neon on the sensor illuminated Fan runs Spark at ignition electrodes for up to 5 seconds and for 3 attempts 3-way valve is open to Domestic Hot Water circuit Go to section ‘A’ Go to section ‘E’ Is main

• Main Combi 25 Eco Elite, 38 13.0 Servicing © Baxi Heating UK Ltd 2014 Case Front Panel Fig. 69 Facia Panel Securing Screws Fig. 70 Inner Door Panel Fig. 71 Condensate Trap Sump 13 .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 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:- �

• Main Combi 25 Eco Elite, 50 16.0 Electrical © Baxi Heating UK Ltd 2014 - brown - black - blue - white br bk b w - green - green / yellow - red g g/y r Control PCB X2 X3 X9 X501 1212 3 3 44 5 5 6789 X1 12 DHW NTC Sensor Central Heating NTC Sensor Fan Gas Valve Overheat 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 9876 54321 910 8 7 6 54321 Hall Effect Sensor r w b w r bk bk r w Diverter Valve Integral Timer (where fitted) 1 2 3 4 1234 bk br bk b N L br br 1 4 2 5 3 1 2 a b Link b g/y br Mains Input br b bk bk bk - greygr gr gr bk E N L 16.1 I

• 26 9.0 Plume Displacement © Baxi Heating UK Ltd 2014 Concentric 60/100 Flue 60Ø Exhaust X Y Fig. 26 2 0 2 4 6 8 10 12 14 60 Ø Exhaust (metres) X Concentric 60/100 Flue ( metres ) Y 0 16 1 34 65798 25 30 Fig. 27 2 0 2 4 6 8 10 12 14 60 Ø Exhaust (metres) X Concentric 60/100 Flue ( metres ) Y 0 16 1 34 65798 25 30 2 0 2 4 6 8 10 12 14 60 Ø Exhaust

• 56 18.0 Fault Finding © Baxi Heating UK Ltd 2014 E20 or E50 - Temperature sensors faulty. Cold resistance approximately 10kΩ @ 25° C (DHW and CH sensors) 20kΩ @ 25° C (Flue sensor) (resistance reduces with increase in temp.) E28 - Incorrect PCB fitted NO E Replace sensor or PCB (E28) Gas at burner Ensure gas is on and purged Replace PCB Replace gas valve PCB - X3 connector is 23

• Main Combi 25 Eco Elite, 28 9.0 Plume Displacement © Baxi Heating UK Ltd 2014 9.3 General Fitting Notes (cont.) 15. For aesthetic purposes it is permissible to route the 60Ø exhaust in an enclosed box, but the air inlet and plume outlet MUST remain in free air. 16. It is also possible to separate the plume outlet from the 93° elbow to allow the flue to be installed as shown in Fig. 34. 17. To do this, first slacken the two screws retaining the plume outlet to the elbow, and remove the outlet (Fig. 35). The elbow can now be use

• Main Combi 25 Eco Elite, 45 14.0 Changing Components © Baxi Heating UK Ltd 2014 14.15 Pressure Gauge (Figs. 90 & 91) 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 the side of the gauge and remove the retaining bracket. 4. Examine the sealing washer, replace if necessary. 5. Reassemble in reverse order. 14.16 Hall Effect Sensor (Fig. 92) 1. Ease the sensor upwards off the hydraulic inlet manifold assembly. 2. Disconnect the electrical plug from the sensor. 3

• Main Combi 25 Eco Elite, 40 14.0 Changing Components © Baxi Heating UK Ltd 2014 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 pressure to the reset position and hold for 5 seconds to reset the boiler before recommissioning. See Section 13.2 “Annual Servicing” for removal of case panel, door etc. 14.1 Igniter (Fig. 77) 1. Disconnect the igniter feed plug and the electrode leads, noting their positions. 2. Undo

• Main Combi 25 Eco Elite, 34 11.0 Commissioning © Baxi Heating UK Ltd 2014 11.1 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 mains water supply to the boiler. IMPORTANT: The heat exchanger air vent on top of the boiler (Fig. 58) MUST be opened before filling the primary system. 4. Open all hot water taps to purge the DHW system. 5. Ensure that the filling

• Main Combi 25 Eco Elite, © Baxi Heating UK Ltd 2014 Comp N o 7210839 - 04 (3/14) MAIN A Trading Division of Baxi Heating UK Ltd (3879156) Brooks House, Coventry Road, Warwick. CV34 4LL After Sales Service 0844 871 1570 Technical 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 improvements in our products which may affect the accuracy of the information contained in this leafl

• Main Combi 25 Eco Elite, 8 2.0 General Layout © Baxi Heating UK Ltd 2014 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 12. Condensate 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 Control

• Main Combi 25 Eco Elite, 35 11.0 Commissioning © Baxi Heating UK Ltd 2014 Set Boiler to Maximum Rate (see 11.1.11) 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 stabilise. Is O 2 ≥ 20.6% and CO 2 < 0.2% ? Verify Flue Integrity Indication that products of combustion & inlet air are mixing - further investigation is required. Check all flue components are correctly assembled, fixed & supported. Check the flue & terminal are unobstructed. Is O 2 ≥ 20.6% and CO 2 < 0.2% ? TURN APPLIANCE OFF ! Call 0844

• Main Combi 25 Eco Elite, 25 9.0 Plume Displacement © Baxi Heating UK Ltd 2014 9.1 Plume Displacement Kit (Fig. 23) Kit No 5118638 Content of kit 1 0.9m 60/100 Concentric Flue 1 1m 60 Dia Exhaust Flue Pipe 1 Adaptor 2 60 Dia Support Brackets 1 93° Elbow/Plume Outlet Assembly 1 Flexible Flue Trim 3 “O” Rings 1 ‘Jubilee Clip 1 Elbow 1. This kit is recommended for installations where the condensate plume emitted from the flue may cause a nuisance or affect the surroundings. 2. The terminal must be positioned outside the building with the air inlet facing downward and outlet connection upwards. 3. The plume outlet must always be at least 45° to the wall, with the ‘peak’ uppermost to prevent rain en

• 53 18.0 Fault Finding © Baxi Heating UK Ltd 2014 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 Error 110 flashing Error 130 flashing Error 133 flashing Turn Centra

• Main Combi 25 Eco Elite, 33 10.0 Installation © Baxi Heating UK Ltd 2014 Fig. 56 Fig. 55 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. 57 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 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. 10.7 Making The Electrical Connections NOTE: Both the Live and Neutral connections are fused. Integral Timer: If required the integral timer supplied in the boiler installation ki

• Main Combi 25 Eco Elite, 14 6.0 System Details © Baxi Heating UK Ltd 2014 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 and water supply regulations. 2. Your attention is drawn to: for GB: Guidance G17 to G24 and recommendation R17 to R24 of the Water Regulations Guide. for IE: the current edition of I.S. 813 “Domestic Gas Installations”. 3. The Water Regulations recommendations for England and Wales prohibits backflow from appliances into the wholesome

More Instructions:

	Main Combi 25 Eco Elite User's manual and important warranty information 13-07-2022 12	DOWNLOAD
	Main Combi 25 Eco Elite Installation & service manual 15-10-2023 56	DOWNLOAD

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