United Kingdom en Installation and Service Manual Gas Fired Wall Mounted Condensing Combination Boiler EcoBlue Plus Combi 24 - 28 - 33 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.
Model Range Building Regulations and the Benchmark Commissioning Checklist Baxi EcoBlue Plus 24 Combi G.C.No 47-075-84 Baxi EcoBlue Plus 28 Combi G.C.No 47-075-85 Baxi EcoBlue Plus 33 Combi G.C.No 47-075-86 Building Regulations (England & Wales) require notification of the installation of a heating appliance to the relevant Local Authority Building Control Department. This can be achieved via a Competent Persons Self Certification Scheme as an option to notifying the Local Authority directly.
Installer Notification Guidelines Installer Notification Guidelines Choose Building Regulations Notification Route Competent Person's Self Certification Scheme Building Control Install and Commission this appliance to manufacturer's instructions Contact your relevant Local Authority Building Control (LABC) who will arrange an inspection or contact a government approved inspector Complete the Benchmark Checklist If you notify via the ‘Gas Safe Register’, the register will issue the Building Regulatio
Contents Contents 1 Introduction 1.1 1.2 1.3 1.4 1.5 1.6 2 Safety 2.1 2.2 2.3 3 4 8 8 9 9 10 10 11 11 11 12 13 General Safety Instructions Recommendations Specific Safety Instructions 2.3.1 Handling 13 13 14 14 15 3.1 3.2 3.3 15 17 18 Technical Data Dimensions and Connections Electrical Diagram Description of the Product 19 4.1 4.2 19 20 20 20 20 20 21 22 23 23 23 General Description Operating Principle 4.2.1 Central Heating Mode 4.2.2 Domestic Hot Water Mode 4.2.
Contents 5.4 5.5 5.6 6 38 6.1 6.2 38 38 38 39 39 39 40 40 42 42 42 42 43 43 43 6.4 6.5 6.6 6.7 44 7.1 7.2 44 44 44 44 45 45 45 45 47 47 47 47 48 7.4 7.5 7.6 9 General Assembly 6.2.1 Fitting the Pressure Relief Discharge Pipe 6.2.2 Connecting the Condensate Drain Preparation 6.3.1 Panel Removal Air Supply / Flue Gas Connections 6.4.1 Connecting the Flue/Chimney Electrical Connections 6.5.1 Electrical Connections of the Appliance 6.5.
Contents 10 11 12 13 Maintenance 52 10.1 10.2 10.3 52 53 54 54 55 55 56 56 57 57 57 57 57 58 58 58 59 59 60 60 61 61 61 62 62 63 63 64 General & Service Message Standard Inspection & Maintenance Operation Specific Maintenance Operations Changing Components 10.3.1 Spark Ignition & Flame Sensing Electrodes 10.3.2 Fan 10.3.3 Air / Gas Venturi 10.3.4 Burner 10.3.5 Insulation 10.3.6 Flue Sensor 10.3.7 Igniter 10.3.8 Heating Flow & Return Sensors 10.3.9 Safety Thermostat 10.3.10 DHW NTC Sensor 10.3.
212136 - 02 (08/14) EcoBlue Plus Combi 7
1 Introduction 1 Introduction 1.1 General WARNING Installation, repair and maintenance must only be carried out only by a competent person. This document is intended for use by competent persons. 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.
Introduction 1.3 1 Symbols Used In these instructions, various levels are employed to draw the user's attention to particular information. In so doing, we wish to safeguard the user's safety, prevent hazards and guarantee correct operation of the appliance. Each level is accompanied by a warning triangle DANGER Risk of a dangerous situation causing serious physical injury. WARNING Risk of a dangerous situation causing slight physical injury. CAUTION Risk of material damage.
1 Introduction 1.5 1.5.1 Extent of Liabilities Manufacturer's Liability Our products are manufactured in compliance with the requirements of the various european applicable Directives. They are therefore delivered with marking and all relevant documentation. In the interest of customers, we are continuously endeavouring to make improvements in product quality. All the specifications stated in this document are therefore subject to change without notice.
Introduction 1.5.2 1 Installer's Responsibility The installer is responsible for the installation and initial start up of the appliance. The installer must adhere to the following instructions: Read and follow the instructions given in the manuals provided with the appliance. Carry out installation in compliance with the prevailing legislation and standards. Ensure the system is flushed and inhibitor added.
1 Introduction 1.6.2 Standards 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 12831 Heating systems in buildings - Calculation of load. BS EN 14336 Installation & commissioning of water based heating systems. BS 6798 Installation of gas fired hot water boilers. BS 5440 Part 1 Flues.
Safety 2 2 Safety 2.1 General Safety Instructions DANGER If you smell gas: 1. Turn off the gas supply at the meter 2. Open windows and doors in the hazardous area 3. Do not operate light switches 4. Do not operate any electrical equipment 5. Do not use a telephone in the hazardous area 6. Extinguish any naked flame and do not smoke 7. Warn any other occupants and vacate the premises 8. Telephone the National Gas Emergency Service on:- 0800 111 999 2.
2 Safety 2.3 2.3.1 Specific Safety Instructions Handling 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.
Technical Specifications 3 3 Technical Specifications 3.1 Appliance Type Electrical Supply 230V~ 50Hz (Appliance must be connected to an earthed supply) C13 C33 C53 Appliance Category CAT I 2H Heat Input CH (Net) 24 model 28 model 33 model Max 20 24 28 kW kW kW Min 4.7 5.7 6.8 Heat Output CH (Non-Condensing) Max Min 24 model kW 20 4.6 28 model kW 24 5.5 33 model kW 28 6.6 Heat Output CH (Condensing) Max 24 model kW 21.2 28 model kW 25.3 33 model kW 29.6 Min 4.9 6.0 7.
3 Technical Specifications 3.1 Pump Available Head Technical Data (cont) SEDBUK Declaration SAP 2005 Seasonal Efficiency is 91.1% SAP 2009 Annual Efficiency is 89% See graph below Pump - Available Head 6 NATURAL GAS ONLY ! Max Gas Rate (Natural Gas - G20) (After 10 mins) 24 model m3/h 2.61 28 model m3/h 3.05 33 model m3/h 3.59 5.5 This value is used in the UK Government’s 5 Standard Assessment Procedure (SAP) for energy 4.5 rating of dwellings.
Technical Specifications 3.2 3 Dimensions and Connections There must be no part of the air duct (white tube) visible outside the property. Dimensions At least 1.5° G E A 700mm B 295mm C 390mm A D 116mm Ø Min. E 160mm (207mm for 80/125mm flue systems) F 130mm B G 106mm 360° Orientation H 228mm H J 162mm D C J Flue Ø 100mm Tap Rail F Condensate Drain Pressure Relief Valve (15mm) 26.5 38.5mm mm 65 mm 65 mm 65 mm 65 mm 65 mm 162.
3 Technical Specifications 3.
Description of the Product 4 4 Description of the Product 4.1 General Description 1. The Baxi EcoBlue Plus Combi boilers are fully automatic gas fired wall mounted condensing combination boilers. They are 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 model 28 model 33 model - Information Label 24 kW DHW 21.2 kW CH (Condensing) 28 kW DHW 25.3 kW CH (Condensing) 33 kW DHW 29.6 kW CH (Condensing) 3.
4 Description of the Product 4.2 19 The boiler can be set in 3 operating modes:- ‘Summer’ (DHW only), ‘Winter’ (CH & DHW) or ‘Heating Only’ (CH only) by use of the button. 20 18 Operating Principle 4.2.1 Central Heating Mode 21 1. With a demand for heating, the pump circulates water through the primary circuit. 22 2. Once the burner ignites the fan speed controls the gas rate to maintain the heating temperature measured by the temperature sensor. 23 24 3.
Description of the Product 4.3 4 Main Components 2 8 3 1 12 11 9 10 23 7 14 15 17 1. Expansion Vessel 2. Boiler Adaptor 3. Primary Heat Exchanger 4. Plate Heat Exchanger 5. Pump with Automatic Air Vent 6. Central Heating System Pressure Gauge 7. Fan Assembly with Venturi 8. Expansion Vessel Locating Stud 9. Flame Sensing Electrode 10. Air/Gas Collector 11. Spark Ignition Electrode 12. Combustion Box Cover & Burner 13. Control Box Display 14. Condensate Trap 15.
4 Description of the Product 4.
Description of the Product 4.5 4 Standard Delivery 1. The pack contains: Boiler Wall mounting plate (pre-plumbing jig) including isolation valves Fittings pack Literature pack • Installation & Servicing Manual (including ‘Benchmark’) • User Guide • Flue Accessories & Fitting Guide • Service Contract Leaflet • Registration Card • Envelope • Fernox Leaflet • Wall Template 4.6 Accessories & Options 4.6.1 Optional Extras 1. Various timers, external controls, etc. are available as optional extras.
5 Before Installation 5 Before Installation 5.1 Installation Regulations WARNING Installation, repair and maintenance must only be carried out only by a competent person. This document is intended for use by competent persons, Installation must be carried out in accordance with the prevailing regulations, the codes of practice and the recommendations in these instructions. Please refer to 1.5.1 and 1.6.
Before Installation 5.2 5.2.1 5 Installation Requirements Gas Supply 1. The gas installation should be in accordance with the relevant standards. In GB this is BS 6891 (NG). In IE this is the current edition of I.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. 3). 3.
5 Before Installation 5.2.6 Treatment of Water Circulating Systems 1. All recirculatory water systems will be subject to corrosion unless they are flushed and an appropriate water treatment is applied. To prevent this, follow the guidelines given in BS 7593 “Treatment of Water in Domestic Hot Water Central Heating Systems” and the treatment manufacturers instructions. 2.
Before Installation 5.2.9 5 Safety Pressure Relief Valve See B.S. 6798 for full details. 1. The pressure relief valve (Fig. 5) 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 15mm diameter, run continuously downward, and discharge outside the building, preferably over a drain.
5 Before Installation 5.3 5.3.1 Choice of the Location Location of the Appliance 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 supply. The boiler should be fitted within the building unless otherwise protected by a suitable enclosure i.e. garage or outhouse. (The boiler may be fitted inside a cupboard-see Section 5.3.4).
Before Installation Examples are shown of the following methods of termination:i) to an internal soil & vent pipe ii) via an internal discharge branch (e.g. sink waste) downstream of the trap iii) to a drain or gully iv) to a purpose made soakaway v) pumped into an internal discharge branch (e.g.
5 Before Installation iii) Termination to a drain or gully Boiler 10. In all cases discharge pipe must be installed to aid disposal of the condensate. To reduce the risk of condensate being trapped, as few bends and fittings as possible should be used and any burrs on cut pipe removed. 50mm p of pip er metre e run 2.5° M inimum 11. When discharging condensate into a soil stack or waste pipe the effects of existing plumbing must be considered.
Before Installation 5.3.6 5 Clearances 1. 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. *This is MINIMUM recommended dimension. Greater clearance will aid installation and maintenance.
5 Before Installation 5.3.7 Flue/Chimney Location 1. The following guidelines indicate the general requirements for siting balanced flue terminals. For GB recommendations are given in BS 5440 Pt 1. For IE recommendations are given in the current edition of I.S. 813 “Domestic Gas Installations”. 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.
Before Installation 5 Under car ports we recommend the use of the plume displacement kit. The terminal position must ensure the safe and nuisance - free dispersal of combustion products. 2. If the terminal discharges onto a pathway or passageway, check that combustion products will not cause a nuisance and that the terminal will not obstruct the passageway. 3.
5 Before Installation 5.3.8 Horizontal Flue/Chimney Systems 1. The standard telescopic flue is suitable only for horizontal termination applications. (ii) (i) 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.
Before Installation 5.3.9 m 0m 5 Flue/Chimney Lengths 1. The standard horizontal telescopic flue kit allows for lengths between 315mm and 500mm from elbow to terminal without the need for cutting (Fig. 11). Extensions of 250mm, 500mm & 1m are available.
5 Before Installation Pre-plumbing Fig. 14 5.5 5.5.1 To remove only the Wall jig slide banding to the edge and open flaps. Slide the wall jig out of carton then close the flaps. Slide banding back on. Unpacking & Initial Preparation Unpacking RISK ASSESSMENT - Before commencing the installation it is recommended that the ‘Five Steps to Risk Assessment’ document published by the HSE is consulted, and an assessment performed as described.
Before Installation 5.6 5.6.1 Stop Valve Double Check Valve Stop Valve 5 Connecting Diagrams System Filling and Pressurising 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 loop is supplied with the boiler. Follow the instructions provided with it. 3.
6 Installation 6 Installation 6.1 Engage the Boiler Mounting Bracket on the Boiler into the Retaining Lugs using the Aligning Lugs for position 1. Remove the sealing caps from the boiler connections under the boiler (including the condensate trap) before lifting into position. A small amount of water may drain from the boiler once the caps are removed.
Prime Trap by pouring 300ml of water into flue spigot Installation 6.2.2 6 Connecting the Condensate Drain 1. Remove the blanking cap, and using the elbow supplied, connect the condensate drain pipework to the boiler condensate 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” & HHIC recommendations). Front Panel and Control Box removed for clarity 2.
6 Installation m 0m 6.4 50 5 31 Air Supply / Flue Gas Connections mm 6.4.1 Connecting the Flue/Chimney HORIZONTAL TELESCOPIC FLUE (concentric 60/100) Terminal Assembly 1. 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. Connection Assembly Fig. 24 2. The two sections can be adjusted to provide a length between 315mm and 500mm (Fig.
Installation 10. Remove the flue elbow and insert the flue through the hole in the wall. Fit the flue trims if required, and refit the elbow to the boiler adaptor, ensuring that it is pushed fully in. Secure the elbow with the screws supplied in the boiler fitting kit (Fig. 29). Boiler Elbow Apply the lubricant supplied for ease of assembly (do not use any other type). Ensure elbow is fully engaged into boiler adaptor 6 Adaptor 11. Draw the flue back through the wall and engage it in the elbow.
6 Installation 6.5 6.5.1 Electrical Connections Electrical Connections of the appliance 1. See Section 5.2.2. for details of the electrical supply. Undo the securing screws and lift the case front panel off. 2. Hinge the control box downwards. Disengage the securing tabs and open the terminal block cover. (Fig. 34). Control Box Fig. 34 Fused Spur L N 3. If the mains cable fitted is not long enough slacken the gland nut in the right of the boiler lower panel and pass the new mains cable through it.
Installation 6.7 6.7.1 6 External Controls Installation of External Sensors 1. Various Sensors are available. 6.7.2 1/2 H 2.5m Min Optional Outdoor Sensor Full instructions are provided with the Outdoor Sensor Kit ! H Positioning the Sensor 1. The sensor must be fixed to an external wall surface of the property it is serving. The wall must face north or west. West North DO NOT position it on a south facing wall in direct sunlight ! N 2.
7 Commissioning 7 Commissioning Automatic Air Vent 7.1 Cap General 1. Reference should be made to BS:EN 12828, 12831 & 14336 when commissioning the boiler. Ensure that the condensate drain trap has been primed - see Section 6.2.2. paragraph 3. 2. At the time of commissioning, complete all relevant sections of the Benchmark Checklist at the rear of this publication. 3. Open the mains water supply to the boiler and all hot water taps to purge the DHW system. 4.
Commissioning 7.3 R /R /P 7.3.1 + 7 Commissioning Procedure De-Aeration Function + The display backlight remains lit approx. 10 minutes. If the backlight goes out during commissioning it does not mean that the process has been completed. This procedure MUST be carried out ! These buttons for De-Aeration Fig. 39 1. Ensure the gas is turned Off! Turn the power to the boiler ON. The software version will be displayed, followed by , then •• flashing briefly before displaying the ‘Standby’ symbol .
7 Commissioning Set Boiler to Maximum Rate (see 7.4.1) Allow the combustion to stabilise. Do not insert probe to avoid ‘flooding’ the analyser. 7.4.1 Checking Combustion (cont) 9. Follow the flow chart opposite. 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 O2 20.6% and CO2 < 0.
Commissioning 7.5 7.5.1 7 Configuring the System Check the Operational (Working Gas Inlet Pressure & Gas Rate) The system MUST be cold to ensure the boiler is operating under full demand. To obtain an accurate measurement on smaller capacity systems it may be necessary to open one or more hot taps and remove the diverter valve motor (see Section 10.3.20) in order to maintain the boiler output. 1. Press & together and hold for at least 6 seconds. is displayed briefly followed by & flashing alternately.
7 Commissioning 5. Set the central heating and hot water temperatures to the requirements of the user. Instruct the user in the operation of the boiler and system. Information Display 6. Instruct the user in the operation of the boiler controls.
Operation 8 8 Operation 8.1 General 1. It is the responsibility of the installer to instruct the user in the day to day operation of the boiler and controls and to hand over the completed Benchmark Checklist at the back of this manual. 2. Set the central heating and hot water temperatures to the requirements of the user. Instruct the user in the operation of the boiler and system. 3.
8 Operation Boiler Information View Standby - Reset - Esc 8.
Settings 9 9 Settings 9.1 Parameters The operating parameters of the boiler have been factory set to suit most systems.
10 Maintenance 10 Maintenance ‘Service Due’ Message After 11 months operation the ‘Service Due’ message will be shown on the boiler display. (If the installation has been subject to prolonged electrical isolation or power cuts this period may be longer than 11 months) Once the service has been completed satisfactorily the ‘Service Due’ message can be reset or de-activated. To Reset or Disable 1. Press & for 6 seconds then press for 6 seconds. Using scroll through until is displayed.
Maintenance 10 10.2 Standard Inspection and Maintenance Operation When performing any inspection or maintenance personal protective equipment must be used where appropriate. 1. Ensure that the boiler is cool and that both the gas and electrical supplies to the boiler are isolated. 2. Remove the screws securing the case front panel. Lift the panel slightly to disengage it from the tabs on top of the case (Fig. 43). Hinge down the control box. 3.
10 Maintenance Expansion Vessel Charge - 1.0 bar 13. To check the charge accurately ensure the system is cold. It is also necessary to relieve the pressure by draining the boiler. Using a suitable gauge check the pressure at the valve on the underside of the vessel. Adjust the pressure as required and repressurise the system. Control Box removed for clarity Flow Restrictor A right angled valve extension will aid checking and repressurising. DHW Filter (Fig. 48) 14.
Maintenance 10.3.2 10 Fan (Figs. 50 & 51) 1. Remove the clip securing the gas feed pipe to the air/gas venturi. Disconnect the pipe. 2. Undo the screws securing the air/gas collector to the extension piece and disconnect the fan electrical plugs (Fig. 50). 3. Remove the collector and fan assembly, being careful to retain the gasket. 4. Undo the securing screw and remove the airbox, disengaging it from the fan venturi. Undo the screws securing the fan to the collector. Retain the gasket. 5.
10 Maintenance 10.3.4 Burner Cover 1. Undo the securing screw and remove the airbox, disengaging it from the fan venturi. Remove the clip securing the gas feed pipe to the air/gas venturi and disconnect the fan electrical plugs. Burner Burner Gasket 2. Undo the screws securing the air/gas collector to the extension piece. Note its orientation and remove the extension piece (where fitted) from the cover. Extension Piece (note orientation) 3. Undo the screws securing the burner.
Maintenance 10 Electrical Plug Flue Sensor 10.3.6 Flue Sensor 1. For ease of access remove the Expansion Vessel as described in Section 10.3.23. 2. Ease the retaining tab on the sensor away and disconnect the electrical plug. 3. Turn the sensor 90° anticlockwise to remove - it is a bayonet connection. Fig. 54 4. Reassemble in reverse order. 10.3.7 Igniter (Fig. 54) 1. Note the position of the ignition & sensing leads and disconnect them. Also disconnect the igniter feed plug. 2.
10 Maintenance 10.3.11 Pump - Head Only (Fig. 57) 1. Disconnect the electrical supply plug from the pump. 2. Close the flow and return isolation taps and drain the boiler primary circuit. For ease of access remove the diverter valve motor (10.3.20). 3. Remove the socket head screws securing the pump head to the body and draw the head away. 4. Reassemble in reverse order. 10.3.12 Pump - Complete (Fig. 58) 1. Disconnect the electrical supply plug from the pump. 2.
Maintenance 10 10.3.14 Safety Pressure Relief Valve (Fig. 59) Clip 1. Close the flow and return isolation taps and drain the primary circuit. 2. To aid access disconnect the igniter plug & disconnect the two pipes from the top of the condensate trap and the drain pipe from the trap outlet. Undo the screw & washer securing the trap to the boiler lower panel. ‘O’ Ring Seal Pressure Relief Valve 3.
10 Maintenance 10.3.16 Plate Heat Exchanger (Fig. 62 & 63) 1. Close the flow & return isolation taps and the cold mains inlet. Drain the primary circuit and draw off any residual DHW. 2. Refer to Section 10.2 paragraphs 5 to 9 and remove the fan etc. Also remove the diverter valve motor and disconnect the pump cable. 3. Undo the screws securing the plate heat exchanger to the hydraulic assembly. 4.
Maintenance 10 10.3.18 DHW Flow Regulator & Filter (Fig. 64) 1. Remove the Fan & Collector (13.2). Close the cold mains inlet and draw off any residual DHW. 2. Pull out the securing clip and prise the regulator and filter assembly out of the hydraulic inlet assembly. 3. Twist the body to unlock the bayonet connection and remove the regulator. 4. Examine and clean the filter, and reassemble in reverse order. 10.3.19 DHW Flow Sensor (‘Hall Effect’ Sensor) (Fig. 65) Control Box removed for clarity 1.
10 Maintenance 10.3.21 Main P.C.B. (Fig. 64) 1. Ensure that the power to the boiler is isolated. 2. Release the clips securing the control box cover and lift away. 3. Note the position of all plugs and wires on the P.C.B. and disconnect them. See Section 3.3 Electrical Diagram for details. 4. Undo the 5 securing screws and remove the P.C.B. It is retained at the left by two spring latches and the right hand edge locates in a slot. 5.
Maintenance 10 Lock Nut 10.3.23 Expansion Vessel 1. Close the flow and return isolation taps and drain the primary circuit. 2. Prise off the securing clip and disconnect the braided hose from the vessel. 3. Whilst supporting the vessel undo the locknut and manoeuvre the vessel out of the boiler. 4. Reassemble in reverse order. Expansion Vessel 10.3.24 Gas Valve (Fig. 69) After replacing the valve the CO2 must be checked and adjusted as detailed in Section 10.3.25 Setting the Gas Valve.
10 Maintenance 10.3.25 Setting the Gas Valve (CO2 Check) R /R /P + The CO2 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 10.1.3. + 1. The combustion (CO2) may be checked after running the boiler for several minutes. To do this it is necessary to operate the boiler in ‘Chimney Sweep Mode’. ‘Chimney Sweep Mode’ • This function must not be activated whilst the burner is lit.
Troubleshooting 11 11 Troubleshooting 11.
11 Troubleshooting Refer to “Illustrated Wiring Diagram” for position of terminals and components Central Heating - Follow operational sequence Turn on mains power The display illuminates NO If 110 or 384 is flashing or re-occurs regularly, check all PCB connections. If this has no effect replace the PCB.
Troubleshooting 11 Domestic Hot Water - Follow operational sequence Turn on mains power The display illuminates NO If 110 or 384 is flashing or re-occurs regularly, check all PCB connections. If this has no effect replace the PCB.
11 Troubleshooting Fault Finding Solutions Sections A Is there 230V at: 1. 2. 3. B NO Main terminals L and N Check electrical supply NO Main terminal fuse Replace fuse NO Check wiring PCB - X10 connector Main terminals L and N Display illuminated Display or Main PCB fault NO Switch to DHW mode maximum flow and press reset.
Troubleshooting F Check and correct if necessary 1. Ignition electrode and lead 2. Electrode connection 3. Spark gap and position YES Check wiring (see Diagram) and 230V at PCB X14 (between blue & brown from igniter) Replace PCB Replace Igniter 4 ±0.5 YES NO 11 Burner Viewing Window Flame Sensing Electrode 7.5 ±1 Spark Ignition Electrode 10 ±1 Electrode Position G 1. 2. Check supply pressure at the gas cock test point (Fig.
11 Troubleshooting CH system pressure less than 0.5 bar or greater than 2.7 bar on digital display I NO J YES Restore correct system pressure YES Check wiring and PCB X22 connector for approx. 5V DC between green & black - see Wiring Diagram Ensure that the boiler and system are fully vented NO Replace hydraulic pressure sensor NO Replace PCB System fault - correct Check flow temperature sensor connections and position.
Decommissioning 12 12 Decommissioning 12.1 Decommissioning Procedure 1. Disconnect the gas & electric supplies and isolate them. 2. Drain the primary circuit and disconnect the filling device. 3. Dismantle the chimney system and remove the boiler from the wall mounting frame.
13 Spare Parts 13 Spare Parts 13.1 General C 1. If, following the annual inspection or maintenance any part of the boiler is found to need replacing, use Genuine Baxi Spare Parts only. 13.2 Spare Parts List D A Key No. Description No. Manufacturers Part No.
14 Notes 14 EcoBlue Plus Combi 73 Notes 7212136 - 02 (08/14)
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 customer’s statutory rights.
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. SERVICE 01 Date: SERVICE 02 Engineer name: Engineer name: Company name: Company name: Telephone No: Telephone No: Gas safe register No: Record: At max.
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 leaflet. All goods are sold subject to our standard Conditions of Sale which are available on request. BAXI A Tr adi n g D i v i s i o n o f B a x i He a t in g UK L t d ( 3 8 7 9 1 5 6 ) Brooks House, Coventry Road, Warwick.
