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Baxi Megaflo System HE IE Series Installation & Servicing Instructions Manual
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Baxi Megaflo System HE IE Series Installation & Servicing Instructions Manual

Gas fired wall mounted condensing boiler
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Surefire Software -
http://www.surefiresoftware.co.uk/index.php
UK Comp No 5129838 - Iss 9 - 4/12
Installation & Servicing Instructions
Baxi Megaflo System HE IE Range
Gas Fired Wall Mounted Condensing Boiler
These instructions include the Commissioning Checklist and should be left with the user for safe keeping.
© Baxi Heating UK Ltd 2012
page 1
Natural Gas
Baxi Megaflo System 15 HE IE
Baxi Megaflo System 18 HE IE
Baxi Megaflo System 24 HE IE
Baxi Megaflo System 28 HE IE
Baxi Megaflo System 32 HE IE
Propane Gas
Baxi Megaflo System 24 HE IE LPG
Baxi Megaflo System 28 HE IE LPG
© Baxi Heating UK Ltd 2012 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:

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Summary of Contents for Baxi Megaflo System HE IE Series

  • Page 1 Baxi Megaflo System 28 HE IE LPG © Baxi Heating UK Ltd 2012 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.
  • Page 2 Surefire Software - http://www.surefiresoftware.co.uk/index.php 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.
  • Page 3 1.0 Introduction 1.1 Description 1. The Baxi Megaflo System HE IE is a fully automatic gas fired wall mounted condensing system boiler. It is room sealed and fan assisted. 2. The boiler is set to give a maximum output of :-...
  • Page 4 3. It is designed for use on either Natural Gas (G20), or Propane (G31) as indicated by the suffix LPG in the model name. Two Propane models are available, the Baxi Megaflo System 24 HE IE LPG & 28 HE IE LPG 4.
  • Page 5 Surefire Software - http://www.surefiresoftware.co.uk/index.php 2.0 General Layout 2.1 Layout...
  • Page 6 Surefire Software - http://www.surefiresoftware.co.uk/index.php Expansion Vessel Automatic Air Vent Circulation Pump Drain Off Point Pressure Relief Valve Selector Switch Central Heating System Pressure Gauge Control Box Gas Valve Condensate Trap Flame Sensing Electrode Spark Electrode Primary Heat Exchanger Fan Assembly On/Off/Reset Selector Switch Central Heating Temperature Control Calibration Control...
  • Page 7 Surefire Software - http://www.surefiresoftware.co.uk/index.php Fig. 2 Heat Exchanger Burner Ignition Electrode Flame Sensing Electrode Gas Valve Pump Automatic Air Vent Pressure Relief Valve Boiler Drain Point 10 Gas Inlet 11 Boiler Flow 12 Boiler Return 13 Pressure Gauge 14 Automatic By-Pass 15 Water Pressure Sensor 16 Safety Thermostat 17 Temperature Sensor...
  • Page 8 Surefire Software - http://www.surefiresoftware.co.uk/index.php IMPORTANT: When the selector switch is in the '0' (Off) position the electrical supply to the boiler is isolated. The boiler will not operate. 3.2 Frost Protection Mode 1. The frost protection mode is integral to the appliance and functions when the selector switch (see Section 2.1) is in the ON position ( If the system temperature falls below 5°...
  • Page 9 Surefire Software - http://www.surefiresoftware.co.uk/index.php 230V~ 50H Electrical Supply (Appliance must be connected to an earthed supply) Power Consumption 15 model 130W 18 model 140W 24 model 150W 28 & 32 models 160W Electrical Protection IPX5D External Fuse Rating Internal Fuse Rating Condensate Drain To accept 21.5mm (¾...
  • Page 10 Surefire Software - http://www.surefiresoftware.co.uk/index.php 15 & 18 Packaged Boiler Carton 52.5kg 53.5kg Installation Lift Weight 43kg 44kg 28 & 32 Packaged Boiler Carton 54.5kg Installation Lift Weight 45kg NOTE: All data in this section are nominal values and subject to normal production tolerances.
  • Page 11 Surefire Software - http://www.surefiresoftware.co.uk/index.php Power Consumption 24 LPG model 150W 28 LPG model 160W Electrical Protection IPX5D External Fuse Rating Internal Fuse Rating Condensate Drain To accept 21.5mm (¾ in) plastic waste pipe Flue Terminal Diameter 100mm Dimensions Projection 125mm Connections copper tails Gas Supply...
  • Page 12 Surefire Software - http://www.surefiresoftware.co.uk/index.php NOTE: All data in this section are nominal values and subject to normal production tolerances. page 10 5.0 Dimensions and Fixings Dimensions A 780mm B 345mm C 450mm D 116mm Ø Min. E 185mm (207mm for 80/125mm flue systems) F 145mm G 131mm H 180mm...
  • Page 13 Surefire Software - http://www.surefiresoftware.co.uk/index.php page 11 6.0 System Details...
  • Page 14 Surefire Software - http://www.surefiresoftware.co.uk/index.php 6.1 Central Heating Circuit 1. The appliance is intended for fully pumped sealed systems. However it can be installed in ‘semi-sealed’ systems also. 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”...
  • Page 15 Surefire Software - http://www.surefiresoftware.co.uk/index.php Fig. 3a 'Semi-Sealed' System 6.4 System Filling and Pressurising Sealed Systems 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.
  • Page 16 Surefire Software - http://www.surefiresoftware.co.uk/index.php Fig. 4 page 13 7.0 Site Requirements 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 supply.
  • Page 17 Surefire Software - http://www.surefiresoftware.co.uk/index.php Fig. 5 *This is the MINIMUM recommended dimension. Greater clearance will aid installation and maintenance.
  • Page 18 Surefire Software - http://www.surefiresoftware.co.uk/index.php Fig. 6 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. page 14 7.3 Ventilation of Compartments 1.
  • Page 19 Surefire Software - http://www.surefiresoftware.co.uk/index.php Fig. 7 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 (3/4"). 7.5 Electrical Supply 1.
  • Page 20 Surefire Software - http://www.surefiresoftware.co.uk/index.php Termination to a drain or gully Termination to a purpose made soak- 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 APPROPRIATE MEASURES TAKEN TO PREVENT BLOCKAGE.
  • Page 21 Surefire Software - http://www.surefiresoftware.co.uk/index.php 1. The condensate outlet will accept 21.5mm (¾in) 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. 2. Ensure the discharge of condensate complies with any national or local regulations in force. BS 6798 &...
  • Page 22 Surefire Software - http://www.surefiresoftware.co.uk/index.php Only ONE 25mm clearance is allowed per installation. If one of the dimensions D, E, F, G or H is 25mm then the remainder MUST be as B.S. 5440-1. NOTE: The distance from a fanned draught appliance terminal installed parallel to a boundary may not be less than 300mm in accordance with the diagram below Fig.
  • Page 23 Surefire Software - http://www.surefiresoftware.co.uk/index.php Fig. 10 page 17 8.0 Flue Options Plume Displacement 60/100 dia kit 1M Extensions 45° & 93° elbows are also available - see Section 9.0 Plume Displacement. Horizontal Flues...
  • Page 24 Surefire Software - http://www.surefiresoftware.co.uk/index.php 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. Total equivalent length = A+B+C+(2x90°Bends) 8.1 Horizontal Flue Systems 1.
  • Page 25 Surefire Software - http://www.surefiresoftware.co.uk/index.php Vertical Flues IMPORTANT: All flue systems must be securely supported at least once every metre. Suitable pipe supports are available as accessories. Vertical Flues (Twin Pipe) Total Equivalent Length = A+B+C+1x90°Bend All vertical and angled runs must be included, measured from the boiler adaptor (point i) to the joint with the flue terminal (point ii).
  • Page 26 Surefire Software - http://www.surefiresoftware.co.uk/index.php 8.2 Twin & Vertical Flue Systems 1. Maximum permissible equivalent flue lengths are:- (60/100) (80/125) Vertical Concentric 10 metres 20 metres Vertical Twin Pipe 15 metres 2. Any additional "in line" bends in the flue system must be taken into consideration. Their equivalent lengths are:- Concentric Pipes: 135°...
  • Page 27 Surefire Software - http://www.surefiresoftware.co.uk/index.php The total equivalent length for this example is = 6.5 metres. AIR DUCT Equivalent No° of Sub total Length Value fittings/pipes 1m extension 5.0m 0.25m 0.5m 135°bend 0.5m 1.0m 91.5°bend Equivalent Length Air Duct = 6.5m FLUE DUCT No°...
  • Page 28 Surefire Software - http://www.surefiresoftware.co.uk/index.php Key Accessory Size Code No...
  • Page 29 Surefire Software - http://www.surefiresoftware.co.uk/index.php FLUE GROUP A Concentric Flue System 100mm diameter A3 Telescopic Internal Flue Kit 315-500mm 5119654 A2 Telescopic Flue (incl elbow) 5118069 Horizontal Flue Terminal (incl elbow) 5118489 Flue Extension 1000mm 5111074 Flue Bend 93° 5111075 Flue Bend (pair) 135°...
  • Page 30 Surefire Software - http://www.surefiresoftware.co.uk/index.php 8.4 Twin Flue Duct Adaptor 1. The kit allows connection of a twin flue system to the boiler adaptor. 8.5 Twin Flue Connection 1. Engage the twin flue duct adaptor in the boiler adaptor, making sure that it is pushed down as far as possible. 2.
  • Page 31 Surefire Software - http://www.surefiresoftware.co.uk/index.php 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.
  • Page 32 Surefire Software - http://www.surefiresoftware.co.uk/index.php Fig. 12 1. When codes of practice dictate the use of terminal guards, they can be obtained from most Plumbers' and Builders' Merchants. 2. There must be a clearance of at least 50mm between any part of the terminal and the guard. 3.
  • Page 33 Surefire Software - http://www.surefiresoftware.co.uk/index.php Fig. 14 Kit No 5118638 Content of kit 0.9m 60/100 Concentric Flue 1m 60 Dia Exhaust Flue Pipe Adaptor 60 Dia Support Brackets 93° Elbow/Plume Outlet Assembly Flexible Flue Trim "O" Rings 'Jubilee Clip 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.
  • Page 34 Surefire Software - http://www.surefiresoftware.co.uk/index.php NOTE: The outlet must be positioned so that any condensate plume is directed away from adjacent surfaces. There must be a constant fall along the entire length of the flue system from the outlet back to the boiler. 4.
  • Page 35 Surefire Software - http://www.surefiresoftware.co.uk/index.php Fig. 17 9.2 Determining Permissible Lengths In the graph the solid line diagonal represents the relationship between the concentric flue assembly (and any extensions) and the 60Ø exhaust (and any extensions or additional bends). Example 1 - Not Permissible Example 1 Flue Lengths - Not Permissible If, for instance, a concentric length of 5 metres was required and the 60Ø...
  • Page 36 Surefire Software - http://www.surefiresoftware.co.uk/index.php each 45° elbow to 0.5 metres. Flue Length - Worked Example Baxi Megaflo System 28 HE IE Fig. 18 opposite an additional 93° elbow and pair of 45° elbows have been included in the 60Ø exhaust. Additional Accessories 93°...
  • Page 37 Surefire Software - http://www.surefiresoftware.co.uk/index.php Fig. 19 3. Measure and cut to size the concentric assembly and any extensions that are being used. 4. Insert the concentric assembly through the hole from outside the building. 5. If required, the flexible flue trim should be fitted prior to this as it cannot be fitted after. Use the large 'Jubilee' clip to secure the trim to the flue (See Fig.
  • Page 38 Surefire Software - http://www.surefiresoftware.co.uk/index.php Fig. 22 Fig. 21 10. If it is necessary to shorten the 60Ø exhaust or any of the extensions, the excess material must be cut from the plain end of the pipe. 11. Determine the position of the 60Ø exhaust and mark on the wall a suitable position for the support bracket. If extensions are being used, a support bracket is supplied in each kit.
  • Page 39 Surefire Software - http://www.surefiresoftware.co.uk/index.php Fig. 25 17. To do this, first slacken the two screws retaining the plume outlet to the elbow, and remove the outlet (Fig. 26). The elbow can now be used to connect the vertical to horizontal 60Ø exhaust (Fig.
  • Page 40 Surefire Software - http://www.surefiresoftware.co.uk/index.php Fig. 28 23. When under balconies or projections it is permissible to rotate the concentric flue length up to 70°, clockwise or anti-clockwise (Fig. 29), if there is insufficient space to connect vertically. Fig. 29 24. This will allow the connection of the exhaust to the outlet spigot. 25.
  • Page 41 Surefire Software - http://www.surefiresoftware.co.uk/index.php Fig. 31 10.1 Unpacking & Initial Preparation The gas supply, gas type and pressure must be checked for suitability before connection (see Section 7.4). Remove staples, open flaps and remove the cardboard sheet. Remove the polystyrene side pieces and literature. Two people can then lift out the boiler. NOTE: a small amount of water may drain from the boiler in the upright position.
  • Page 42 Surefire Software - http://www.surefiresoftware.co.uk/index.php Fig. 35 2. Flush thoroughly (see System Details, Section 6.2). page 27 10.3 Fitting The Boiler 1. Lift the boiler by holding as shown by the shaded areas. The boiler should be lifted by TWO PEOPLE. Engage the slots at the top rear of the boiler on the wall plate (Fig.
  • Page 43 Surefire Software - http://www.surefiresoftware.co.uk/index.php Fig. 38 1. 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.
  • Page 44 Surefire Software - http://www.surefiresoftware.co.uk/index.php 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. The outer duct of the Connection Assembly is painted white. On the Terminal Assembly the outer duct is unpainted.
  • Page 45 Surefire Software - http://www.surefiresoftware.co.uk/index.php Fig. 40 5. If the distance from the flue elbow to the outside face of the wall ('X' in Fig. 40) is less than 250mm the Connection Assembly can be discarded and the Terminal Assembly fitted directly into the elbow. 6.
  • Page 46 Surefire Software - http://www.surefiresoftware.co.uk/index.php Fig. 43 9. Using a 2mm bit, drill through the holes at the end of the Connection Assembly into the Terminal Assembly and secure them together using the screws supplied (Fig. 42). Seal the joint with the tape provided (Fig.
  • Page 47 Surefire Software - http://www.surefiresoftware.co.uk/index.php Fig. 45 IMPORTANT: It is essential that the flue terminal is fitted as shown to ensure correct boiler operation and prevent water entering the flue. 13. Make good between the wall and air duct outside the building. 14.
  • Page 48 Surefire Software - http://www.surefiresoftware.co.uk/index.php NOTE: Both the Live and Neutral connections are fused. To connect an external control proceed as follows:- 1. Slacken the facia panel securing screws and lift the outercase panel so that its securing tabs are clear of the facia. Remove the panel. 2.
  • Page 49 Surefire Software - http://www.surefiresoftware.co.uk/index.php 11.0 Commissioning 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. IMPORTANT: The heat exchanger air vent on top of the boiler (Fig.
  • Page 50 Surefire Software - http://www.surefiresoftware.co.uk/index.php IMPORTANT: The combustion for this appliance has been checked, adjusted and preset at the factory for operation on the gas type specified on the appliance data plate. No measurement of the combustion is necessary. Do not adjust the air/gas ratio valve. 10.
  • Page 51 Surefire Software - http://www.surefiresoftware.co.uk/index.php 4. The display will now alternate between 'SF' and the current boiler temperature and both green LEDs will flash (Figs. 56 & 57). Fig. 56 Fig. 57 5. Turn CH temperature control knob fully clockwise. As the knob is turned the display will change from '0' to '00' (Fig.
  • Page 52 Surefire Software - http://www.surefiresoftware.co.uk/index.php Fig. 60 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. 55a) is in accordance with B.S. 6798 & B.S. 6891. 7.
  • Page 53 Surefire Software - http://www.surefiresoftware.co.uk/index.php Fig. 61 12.1 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.
  • Page 54 Surefire Software - http://www.surefiresoftware.co.uk/index.php Check the Combustion Performance (CO/CO ratio) Set the boiler to operate at maximum rate as described in Section 15.1.1 to 15.1.6. Remove the plug from the flue sampling point, insert the analyser probe and obtain the CO/CO ratio.
  • Page 55 Surefire Software - http://www.surefiresoftware.co.uk/index.php 5. Unscrew the sump from the bottom of the condensate trap assembly (Fig. 64) and remove any deposits from the sump and trap. Clean as necessary and replace the sump 6. Undo the nut on the gas inlet pipe to the venturi (Fig.
  • Page 56 Surefire Software - http://www.surefiresoftware.co.uk/index.php 7. Disconnect the electrode leads, noting their position, and the fan electrical plugs (Fig. 66). 8. Undo the four nuts retaining the combustion box cover to the heat exchanger. 9. Carefully draw the fan, collector and cover assembly forward, being careful to retain the injector in the venturi (Figs.
  • Page 57 Surefire Software - http://www.surefiresoftware.co.uk/index.php Section 13.2 "Annual Servicing" for removal of case panel, door etc. 14.1 Igniter (Fig. 1. Disconnect the igniter feed plug and the electrode leads, noting their positions. 2. Undo the screw securing the bracket to the boiler.
  • Page 58 Surefire Software - http://www.surefiresoftware.co.uk/index.php 3. Remove the igniter and transfer the bracket to the new component. 4. Reassemble in reverse order. 14.2 Spark and Sensing Electrodes (Fig. 1. 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.
  • Page 59 Surefire Software - http://www.surefiresoftware.co.uk/index.php 1. Undo the nut on the gas inlet pipe to the venturi (Fig. 70) and pull the sensing pipe off the fan. 2. Disconnect the electrode leads, noting their position and disconnect the fan electrical plugs. 3.
  • Page 60 Surefire Software - http://www.surefiresoftware.co.uk/index.php 14.4 Venturi (Fig. 1. Remove the collector and fan assembly as described in section 14.3. 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.
  • Page 61 Surefire Software - http://www.surefiresoftware.co.uk/index.php...
  • Page 62 Surefire Software - http://www.surefiresoftware.co.uk/index.php 1. Undo the screws securing the collector to the venturi and extension piece. Remove this extension piece from the cover (not on 28/32 models 2. Withdraw the burner from the cover and replace with the new one. 3.
  • Page 63 Surefire Software - http://www.surefiresoftware.co.uk/index.php 1. Remove the two wires from the microswitch. 2. Undo the screw securing the microswitch to the valve body. 3. Reassemble in reverse order. 14.10 Central Heating Temperature Sensor (NTC) (Fig. 1. Ease the retaining tab on the sensor away and disconnect the electrical plug. 2.
  • Page 64 Surefire Software - http://www.surefiresoftware.co.uk/index.php 1. Drain the primary circuit and remove the socket head screws securing the pump head to the body and draw the head away. 2. Undo the screw on the pump wiring cover and remove the cover. Using a suitable flat bladed screw driver press the cable securing levers downwards to release each wire after noting their position.
  • Page 65 Surefire Software - http://www.surefiresoftware.co.uk/index.php 3. A standard replacement Grundfos 15-60 head can now be fitted. Connect the pump wiring to the new head. The pump speed must be set to 3 (Fig. 79). 4. Reassemble in reverse order. 14.14 Pump - Complete (Fig.
  • Page 66 Surefire Software - http://www.surefiresoftware.co.uk/index.php Fig. 83 1. 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.
  • Page 67 Surefire Software - http://www.surefiresoftware.co.uk/index.php 1. 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. Disengage the rear of the cover from the control box hinge pin (Fig.
  • Page 68 Surefire Software - http://www.surefiresoftware.co.uk/index.php 4. 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. Remove the valve. 5. Reassemble in reverse order., ensuring that all seals are in place and the injector is fitted. NOTE: To assist the boiler to light prior 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.
  • Page 69 Surefire Software - http://www.surefiresoftware.co.uk/index.php Fig. 87 1. 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. 4.
  • Page 70 Surefire Software - http://www.surefiresoftware.co.uk/index.php Fig. 88 4. The display will now alternate between 'SF' and the current boiler temperature and both green LEDs will flash (Figs. 89 & 90). Fig. 89 Fig. 90 5. Turn the left hand knob fully clockwise. As the knob is turned the display will change, indicating the fan speed. 6.
  • Page 71 Surefire Software - http://www.surefiresoftware.co.uk/index.php Fig. 92 Fig. 93 7. Remove the plug from the flue sampling test point. Insert the analyser probe and allow sufficient time for the reading to settle (Fig. 94). Fig. 94 Fig. 95 If the CO is reset at minimum rate it must be rechecked at maximum rate again and adjusted if required.
  • Page 72 Surefire Software - http://www.surefiresoftware.co.uk/index.php 9. The CO must then be checked at 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. The CO should be:- N.G.
  • Page 73 Surefire Software - http://www.surefiresoftware.co.uk/index.php - brown - black - blue - white - green g/y - green / yellow - red page 46 17.0 Short Parts List Short Parts List Key No. Description Manufacturers Part No. Flue Thermostat 5114747 Burner (15/18/24) 5122149 Burner (28) 5114697...
  • Page 74 Surefire Software - http://www.surefiresoftware.co.uk/index.php...
  • Page 75 Surefire Software - http://www.surefiresoftware.co.uk/index.php page 47 18.0 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. Table Of Error Codes Central Heating NTC Fault Flue NTC Fault...
  • Page 76 Surefire Software - http://www.surefiresoftware.co.uk/index.php ensure the gas and electrical supplies are isolated. 18.2 Error Codes 1. If a 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 letter 'E'. For example, code E133 will be displayed by 'E1' alternating with '33'. E20 is shown as 'E' then '20' E20 and E28 indicate faulty components.
  • Page 77 Surefire Software - http://www.surefiresoftware.co.uk/index.php page 49 Fault Finding Solutions Sections...
  • Page 78 Surefire Software - http://www.surefiresoftware.co.uk/index.php page 50...
  • Page 79 Surefire Software - http://www.surefiresoftware.co.uk/index.php page 51...
  • Page 80 Surefire Software - http://www.surefiresoftware.co.uk/index.php page 52 19.0 Notes page 53 GAS BOILER COMMISSIONING CHECKLIST...
  • Page 81 Surefire Software - http://www.surefiresoftware.co.uk/index.php page 54 SERVICE INTERVAL RECORD It is recommended that your heating system is serviced regularly and that you complete the appropriate Service Interval Record Below. Service Provider. Before completing the appropriate Service Interval Record below, please ensure you have carried out the service as described in the boiler manufacturer's instructions.
  • Page 82 Surefire Software - http://www.surefiresoftware.co.uk/index.php page 55 Contact us For general enquiries contact branches nationwide For technical advice please contact 056 7720 023 For in warranty service contact 090 6424 062 Branches Nationwide www.heatmerchants.ie...
  • Page 83 All goods are sold subject to our standard Conditions of Sale which are available on request. BAXI A Trading Division of Baxi Heating UK Ltd (3879156), Brooks House, Coventry Road, Warwick.

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