Baxi Megaflo System I5 HE IE Installation & Servicing Instructions Manual
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Baxi Megaflo System I5 HE IE Installation & Servicing Instructions Manual

Baxi Megaflo System I5 HE IE Installation & Servicing Instructions Manual

Baxi megaflo system he ie range gas fired wall mounted condensing boiler
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See also: Instructions for Installation and Servicing , Operation and Warranty Manual
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 2011
Supplied By www.heating spares.co Tel. 0161 620 6677

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  • Page 1 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 2011 Supplied By www.heating spares.co Tel. 0161 620 6677...
  • Page 2 Baxi Megaflo System 24 HE IE LPG Baxi Megaflo System 28 HE IE LPG © Baxi Heating UK Ltd 2011 All rights reserved. No part of this publication may be reproduced or transmitted in any form or by any means, or stored in any...
  • Page 3 BS 7074 Expansion vessels and ancillary equipment for sealed water systems. For IE only. BS 7593 Treatment of water in domestic hot water central heating systems. © Baxi Heating UK Ltd 2011 Supplied By www.heating spares.co Tel. 0161 620 6677...
  • Page 4 DO NOT ‘work through’ the pain - you may cause further injury. IF IN ANY DOUBT DO NOT HANDLE OR LIFT THE BOILER - OBTAIN ADVICE OR ASSISTANCE BEFORE PROCEEDING !! © Baxi Heating UK Ltd 2011 Supplied By www.heating spares.co Tel. 0161 620 6677...

  • Page 5: Table Of Contents

    Installation 11.0 Commissioning 12.0 Completion 13.0 Servicing 14.0 Changing Components 15.0 Setting the Gas Valve 16.0 Electrical 17.0 Short Parts List 18.0 Fault Finding Commissioning Checklist © Baxi Heating UK Ltd 2011 Supplied By www.heating spares.co Tel. 0161 620 6677...

  • Page 6: Introduction

    1.0 Introduction 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. Case Front Panel 2. The boiler is set to give a maximum output of :- 15 models - 15 kW 16.2 kW (Condensing)

  • Page 7: General Layout

    On/Off/Reset Selector Switch Central Heating Temperature Control Calibration Control Venturi Air/Gas Collector Combustion Box Cover & Burner Igniter Burner On Light Central Heating Mode Light Display © Baxi Heating UK Ltd 2011 Supplied By www.heating spares.co Tel. 0161 620 6677...

  • Page 8: Appliance Operation

    Pressure Relief Valve Boiler Drain Point Gas Inlet Boiler Flow Boiler Return Pressure Gauge Automatic By-Pass Water Pressure Sensor Safety Thermostat Temperature Sensor Expansion Vessel Return Temperature Sensor © Baxi Heating UK Ltd 2011 Supplied By www.heating spares.co Tel. 0161 620 6677...

  • Page 9: Technical Data

    Pump - Available Head Injector (Natural Gas - G20) 15 model 4.5mm 18 model 5.7mm 24 model 7.5mm 28 model 12mm 32 model 12mm 1000 1200 Flow Rate (l/h) © Baxi Heating UK Ltd 2011 Supplied By www.heating spares.co Tel. 0161 620 6677...
  • Page 10 Installation Lift Weight 44kg 45kg Electrical Supply 230V~ 50H z (Appliance must be connected to an earthed supply) Pump - Available Head 1000 1200 Flow Rate (l/h) © Baxi Heating UK Ltd 2011 Supplied By www.heating spares.co Tel. 0161 620 6677...

  • Page 11: Dimensions And Fixings

    Flue Ø 100mm Tap Rail 32.5 mm Condensate Drain 130 mm 130 mm 65 mm Heating Heating Pressure Relief Return Flow Inlet Valve (3/4”) (1/2”) (3/4”) (3/4”) © Baxi Heating UK Ltd 2011 Supplied By www.heating spares.co Tel. 0161 620 6677...

  • Page 12: System Details

    3. The boiler should be controlled so that it operates on demand only. 4. Operation of the system under control of the boiler thermostat & TRV’s only does not produce the best results. © Baxi Heating UK Ltd 2011 Supplied By www.heating spares.co Tel. 0161 620 6677...
  • Page 13 4, A remote relief valve kit is available to enable the boiler to be installed in cellars or similar locations below outside ground Fig. 4 level (kit no. 5121379). Pressure Relief Valve Discharge Pipe © Baxi Heating UK Ltd 2011 Supplied By www.heating spares.co Tel. 0161 620 6677...

  • Page 14: Site Requirements

    *This is the MINIMUM recommended dimension. Greater clearance will aid installation and maintenance. 450mm Min For Servicing Purposes 5mm Min In Operation Fig. 6 © Baxi Heating UK Ltd 2011 Supplied By www.heating spares.co Tel. 0161 620 6677...
  • Page 15 1. If the boiler is fitted in a room containing a bath or shower reference should be made to the current edition of I.S. 813 “Domestic Gas Installations” and the current ETCI rules. © Baxi Heating UK Ltd 2011 Supplied By www.heating spares.co Tel. 0161 620 6677...
  • Page 16 (e.g. sink waste) iii) to a drain or gully 500mm min iv) to a purpose made soakaway Holes in the soak-away must face away from the building © Baxi Heating UK Ltd 2011 Supplied By www.heating spares.co Tel. 0161 620 6677...
  • Page 17 Fig. 8 Section 9.0). Property Boundary Line Air Inlet Opening Window or Door 150mm Fig. 10 MIN. Fig. 9 Likely flue positions requiring a flue terminal guard © Baxi Heating UK Ltd 2011 Supplied By www.heating spares.co Tel. 0161 620 6677...

  • Page 18: Flue Options

    This bend is equivalent to 1 metre (ii) This bend is equivalent to 1 metre Total equivalent length = A+B+C+(2x90°Bends) © Baxi Heating UK Ltd 2011 Supplied By www.heating spares.co Tel. 0161 620 6677...
  • Page 19 This bend is equivalent to 1 metre FLUE DUCT Equivalent Sub total Length Value fittings/pipes 1m extension 5.0m 135°bend 0.25m 0.5m 91.5°bend 1.0m 0.5m Equivalent Length Flue Duct = 6.5m © Baxi Heating UK Ltd 2011 Supplied By www.heating spares.co Tel. 0161 620 6677...
  • Page 20 5111078 (use with 5111070) Vertical Flue Terminal 5118576 Pitch Roof Flashing 25°/45° 246141 Pitch Roof Flashing 35°/55° 246142 Roof Cover Plate 246143 Flat Roof Flashing 246144 © Baxi Heating UK Ltd 2011 Supplied By www.heating spares.co Tel. 0161 620 6677...
  • Page 21 (at least once every metre using the available pipe supports). Boiler Adaptor 3. Ensure that all joints and elbows are fully engaged and cannot become disconnected during operation. © Baxi Heating UK Ltd 2011 Supplied By www.heating spares.co Tel. 0161 620 6677...
  • Page 22 1. If required, push the flue deflector over the terminal end and rotate to the optimum angle for deflecting plume. Secure the deflector to the terminal with screws provided. © Baxi Heating UK Ltd 2011 Supplied By www.heating spares.co Tel. 0161 620 6677...

  • Page 23: Plume Displacement

    Installation & Servicing Instructions and BS5440 Pt. 1. It is NOT necessary to fit a terminal guard over the air inlet or the plume outlet. © Baxi Heating UK Ltd 2011 Supplied By www.heating spares.co Tel. 0161 620 6677...
  • Page 24 60Ø Exhaust Bracket 45° Elbow Flue Length - Worked Example Baxi Megaflo System 28 HE IE 93° Elbow In Fig. 18 opposite an additional 93° elbow and pair of 45° elbows have been included in the 60Ø exhaust. 1 metre Extension Concentric 60/100 Flue Also 3 straight extension pieces have been used.
  • Page 25 14. Fit the 93° elbow/plume outlet and secure with the two remaining screws supplied. Ensure the plume outlet is at least 45° to the wall and that the ‘peak’ is uppermost Fig. 24 (Fig. 24). © Baxi Heating UK Ltd 2011 Supplied By www.heating spares.co Tel. 0161 620 6677...
  • Page 26 Fig. 28 70° Concentric Flue Length (shown end-on) Outlet Spigot Fig. 29 © Baxi Heating UK Ltd 2011 Supplied By www.heating spares.co Tel. 0161 620 6677...

  • Page 27: Installation

    1. Connect a tube to the central heating flow or return pipe (Fig. 35). 2. Flush thoroughly (see System Details, Section 6.2). Flushing Tube Wall Plate Fig. 35 Central Heating Return © Baxi Heating UK Ltd 2007 Supplied By www.heating spares.co Tel. 0161 620 6677...
  • Page 28 If this is not possible, discharge into an outside drain is acceptable. © Baxi Heating UK Ltd 2007 Supplied By www.heating spares.co Tel. 0161 620 6677...
  • Page 29 Boiler Adaptor walls of these thicknesses. Adaptor 7. To dimension ‘X’ add 50mm. This dimension to be known as ‘Y’. Fig. 41 Wall Thickness Fig. 40 © Baxi Heating UK Ltd 2011 Supplied By www.heating spares.co Tel. 0161 620 6677...
  • Page 30 Extension Adaptor Tape Cut End Fig. 46 Apply Lubricant for ease of assembly. Ensure Extension is fully engaged into Boiler Adaptor © Baxi Heating UK Ltd 2011 Fig. 47 Supplied By www.heating spares.co Tel. 0161 620 6677...
  • Page 31 2. These should be performed using a suitable meter, and include checks for Earth Continuity, Fig. 50 Resistance to Earth, Short Circuit and Polarity. © Baxi Heating UK Ltd 2011 Supplied By www.heating spares.co Tel. 0161 620 6677...

  • Page 32: Commissioning

    • The integrity of the flue system and the flue seals. • The integrity of the boiler combustion circuit and the relevant seals. Proceed to put the boiler into operation as follows: © Baxi Heating UK Ltd 2011 Supplied By www.heating spares.co Tel. 0161 620 6677...
  • Page 33 Conformity” to indicate compliance with I.S. 813. An example Fig. 60 Fig. 59 of this is given in I.S. 813 “Domestic Gas Installations”. This is in addition to the Benchmark Commissioning Checklist. © Baxi Heating UK Ltd 2011 Supplied By www.heating spares.co Tel. 0161 620 6677...

  • Page 34: Completion

    Installations”. This is in addition to the Gas Boiler Commissioning Checklist. 5. Hand over the Users Operating, Installation and Servicing Instructions giving advice on the necessity of regular servicing. Facia Panel Fig. 61 © Baxi Heating UK Ltd 2011 Supplied By www.heating spares.co Tel. 0161 620 6677...

  • Page 35: Servicing

    5. Unscrew the sump from the bottom of the condensate trap Sump assembly (Fig. 64) and remove any deposits from the sump and trap. Clean as necessary and replace the sump Fig. 64 © Baxi Heating UK Ltd 2011 Supplied By www.heating spares.co Tel. 0161 620 6677...
  • Page 36 Commissioning Checklist at the rear of this publication Fig. 66 and then hand it back to the user. Venturi Injector Gas Inlet Pipe Fig. 65 © Baxi Heating UK Ltd 2011 Supplied By www.heating spares.co Tel. 0161 620 6677...

  • Page 37: Changing Components

    3. Check the condition of the sealing gaskets and replace if necessary. Reassemble in reverse order. Spark Electrode Electrode Leads Sensing Electrode Fig. 68 © Baxi Heating UK Ltd 2011 Supplied By www.heating spares.co Tel. 0161 620 6677...
  • Page 38 Fig. 69 2. Extract and replace the injector and reassemble in reverse order. Fig. 71 When fitting the venturi ensure that the arrow is pointing forward © Baxi Heating UK Ltd 2011 Supplied By www.heating spares.co Tel. 0161 620 6677...
  • Page 39 Exchanger 7. Examine the cover seal and replace if necessary. Rear Insulation Spark Electrode Venturi Cover Insulation Seal Fig. 73 Collector Electrode Sensing Leads Electrode © Baxi Heating UK Ltd 2011 Supplied By www.heating spares.co Tel. 0161 620 6677...
  • Page 40 2. Prise the sensor retaining clip off the pipe and remove the sensor from the clip. 3. Reassemble in reverse order. Return Heating Temperature Sensor Microswitch Fig. 76 Fig. 77 © Baxi Heating UK Ltd 2011 Supplied By www.heating spares.co Tel. 0161 620 6677...
  • Page 41 2. Examine the ‘O’ ring seal, replacing if necessary, and fit it Fig. 79 Automatic Air to the new automatic air vent. Vent 3. Reassemble in reverse order. Pump Wiring Cover Fig. 80 © Baxi Heating UK Ltd 2011 Supplied By www.heating spares.co Tel. 0161 620 6677...
  • Page 42 4. Fit the new valve and ‘O’ ring seal and set to the previously noted orientation. Reassemble in reverse order. ‘O’ Ring Seal Grub Screw Discharge Pipe Fig. 83 © Baxi Heating UK Ltd 2011 Supplied By www.heating spares.co Tel. 0161 620 6677...
  • Page 43 4. Remove the screws securing the switch to the facia panel. Facia 5. Fit the new switch, ensuring that it is correctly positioned and reassemble in reverse order. Selector Switch Knob Temperature Control Knobs Fig. 85 © Baxi Heating UK Ltd 2011 Supplied By www.heating spares.co Tel. 0161 620 6677...
  • Page 44 4. Locate the retaining bracket on the upper flange of the Expansion Vessel vessel and fit to the boiler. 5. Reassemble in reverse order. Boiler Chassis Lock Nut Fig. 87 © Baxi Heating UK Ltd 2011 Supplied By www.heating spares.co Tel. 0161 620 6677...

  • Page 45: Setting The Gas Valve

    12. Check the Combustion Performance (CO/CO ratio). adjusted if required. This must be less than 0.004. © Baxi Heating UK Ltd 2011 Supplied By www.heating spares.co Tel. 0161 620 6677...

  • Page 46: Electrical

    Spark Generator Gas Valve Link Ignition Electrode Mains Input Cable - green - brown - green / yellow - black - red - blue - white © Baxi Heating UK Ltd 2011 Supplied By www.heating spares.co Tel. 0161 620 6677...

  • Page 47: Short Parts List

    5129832 PCB IE 24 720045501 PCB IE 28 5129834 PCB IE 32 5129835 PCB IE 24 LPG 720045801 PCB IE 28 LPG 5129837 Pressure Gauge 248090 © Baxi Heating UK Ltd 2011 Supplied By www.heating spares.co Tel. 0161 620 6677...

  • Page 48: Fault Finding

    4. If this does not have any effect, or the codes are displayed regularly further investigation is required. © Baxi Heating UK Ltd 2011 Supplied By www.heating spares.co Tel. 0161 620 6677...
  • Page 49 Go to section ‘K’ Pump continues to run for 3 Operation sequence Burner goes out Fan stops after 10 seconds minutes successful (room thermostat open) © Baxi Heating UK Ltd 2011 Supplied By www.heating spares.co Tel. 0161 620 6677...
  • Page 50 Fan connections correct at fan. PCB - X2 connector, is 230V AC across Fan jammed or faulty winding Replace fan terminals 5 & 7 Replace PCB © Baxi Heating UK Ltd 2011 Supplied By www.heating spares.co Tel. 0161 620 6677...
  • Page 51 ‘common’ to 2 & ‘volts’ to 5) Replace igniter 3. Spark gap and position Check wiring Burner Viewing Window Sensing Electrode Spark Ignition Electrode Electrode Position © Baxi Heating UK Ltd 2011 Supplied By www.heating spares.co Tel. 0161 620 6677...
  • Page 52 Replace sensor 20kΩ @ 25° C (Flue sensor) (resistance reduces with increase in temp.) Replace heat exchanger If pump is running the heat exchanger could be obstructed © Baxi Heating UK Ltd 2011 Supplied By www.heating spares.co Tel. 0161 620 6677...
  • Page 53 19.0 Notes © Baxi Heating UK Ltd 2011 Supplied By www.heating spares.co Tel. 0161 620 6677...

  • Page 54: Commissioning Checklist

    THE OPERATION OF THE APPLIANCE AND SYSTEM CONTROLS HAVE BEEN DEMONSTRATED TO THE CUSTOMER THE MANUFACTURER’S LITERATURE HAS BEEN LEFT WITH THE CUSTOMER COMMISSIONING ENG’S NAME PRINT ID No. SIGN DATE © Baxi Heating UK Ltd 2011 Supplied By www.heating spares.co Tel. 0161 620 6677...

  • Page 55: Service Interval Record

    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 56: Description

    A Tr ad in g D i v i si o n o f B axi H e ati ng UK Ltd ( 3879156) , Brooks House, Coventry Road, Warwick. CV34 4LL Website www.baxi.co.uk e&oe UK Comp N - Iss 7 - 3/11 © Baxi Heating UK Ltd 2011 5129838 Supplied By www.heating spares.co Tel. 0161 620 6677...

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