Baxi Platinum 2 Combi 28 GA Installation & Servicing Instructions Manual
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Baxi Platinum 2 Combi 28 GA Installation & Servicing Instructions Manual

Gas fired wall mounted condensing combination boiler
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Installation & Servicing Instructions
Platinum 2 Combi GA Range
Gas Fired Wall Mounted Condensing
Combination Boiler
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.
© Baxi Heating UK Ltd 2011

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Summary of Contents for Baxi Platinum 2 Combi 28 GA

  • Page 1 Gas Fired Wall Mounted Condensing Combination Boiler 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. © Baxi Heating UK Ltd 2011...

  • Page 2: Natural Gas

    UK and to encourage the regular servicing of all central heating systems to ensure safety and efficiency. © 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: Installer Notification Guidelines

    Benchmark Checklist ‘Gas Safe Register’ will issue a LABC will record the data Building Regulations Compliance and will issue a Certificate to the property owner certificate of compliance and inform the relevant LABC © Baxi Heating UK Ltd 2011...
  • Page 4 BS EN 14336 Installation & commissioning of water based heating systems. BS 7074 Expansion vessels and ancillary equipment for sealed water systems. BS 7593 Treatment of water in domestic hot water central heating systems. © Baxi Heating UK Ltd 2011...
  • Page 5 If at any time when installing the boiler you feel that you may have injured yourself STOP !! 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...

  • Page 6: Table Of Contents

    11.0 Electrical (includes details of Low Voltage Room Unit connection etc.) 12.0 Commissioning 13.0 Completion 14.0 Servicing 15.0 Changing Components 16.0 Combustion 17.0 Schematic Wiring 18.0 Short Parts List 19.0 Fault Finding Benchmark Checklist © Baxi Heating UK Ltd 2011...

  • Page 7: Introduction

    1.0 Introduction Description 1. The Baxi Platinum 2 Combi GA Range 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 :-...

  • Page 8: General Layout

    Condensate Trap Safety Pressure Relief Valve Drain Off Point Gas Valve Diverter Valve Motor i-THINK Controller Air Box (28 kW model ONLY) Item 20 is on 28 kW model only. All illustrations show 33/40 models. © Baxi Heating UK Ltd 2011...

  • Page 9: Appliance Operation

    Water Inlet connection Connections:- A – Condensate Drain B – Heating Flow C – Domestic Hot Water Outlet D – Gas Inlet E – Cold Water Inlet On/Off Valve and filter F – Heating Return © Baxi Heating UK Ltd 2011...

  • Page 10: Technical Data

    Packaged Boiler Carton 45.5kg Pump - Available Head Installation Lift Weight 39.5kg NOTE: All data in this section are nominal values and subject to normal production tolerances. Maximum Minimum 1000 1200 Flow Rate (l/h) © Baxi Heating UK Ltd 2011...

  • Page 11: Dimensions And Fixings

    Pressure Relief Valve (15mm) 50 mm 45 mm 65 mm 65 mm 65 mm 65 mm 95 mm Heating Heating Hot Water Cold Water Return Inlet Flow Outlet Inlet (22mm) (22mm) (22mm) (15mm) (15mm) © Baxi Heating UK Ltd 2011...

  • Page 12: System Details

    6.0 System Details Information 1. The Baxi Platinum 2 Combi GA Condensing Combination Boiler is a ‘Water Byelaws Scheme - Approved Product’. To comply with the Water Byelaws your attention is drawn to the following installation requirements and notes (IRN).
  • Page 13 5. A boiler discharge pump is available, part no. 720648301. This pump will dispose of both condensate & high temperature Pressure Relief Valve Discharge Pipe water from the relief valve. It has a maximum head of 5 metres. © Baxi Heating UK Ltd 2011...
  • Page 14 Fittings are intended to be used in the DHW therefore all pipework, connections, fittings, etc. should be system connected to a Baxi Platinum Combi GA suitable for pressures in excess of 8 bar. A pressure reducing it is strongly recommended that the DHW flow rate DOES NOT fall below 2.5l/min.

  • Page 15: Site Requirements

    Purposes 2. BS 5440: Part 2 refers to room sealed appliances installed in compartments. The appliance will run sufficiently cool without ventilation. 5mm Min 353mm* In Operation *345 when i-THINK controller removed Fig. 9 © Baxi Heating UK Ltd 2011...
  • Page 16 In IE reference should be made to the current edition of I.S. Ceiling Window Recess 813 “Domestic Gas Installations” and the current ETCI Zone 2 rules. Outside Zones 2.25 m Zone 1 Zone 2 Zone 0 0.6 m Fig. B In GB Only © Baxi Heating UK Ltd 2011...
  • Page 17 & vent pipe Holes in the soak-away must ii) via an internal discharge branch (e.g. sink waste) face away from the building iii) to a drain or gully iv) to a purpose made soakaway © Baxi Heating UK Ltd 2011...
  • Page 18 (see Fig. 13). Fig. 11 Property Boundary Line Air Inlet Opening Window or Door 150mm Fig. 13 MIN. Likely flue positions requiring Fig. 12 a flue terminal guard © Baxi Heating UK Ltd 2011...

  • Page 19: Flue Options

    This bend is equivalent to 1 metre (ii) This bend is equivalent to 1 metre Total equivalent length = A+B+C+2 x 90°Bends © Baxi Heating UK Ltd 2011...
  • Page 20 Secure the deflector to the terminal with screws provided. Flue Accessories 1. For full details of Flue Accessories (elbows, extensions, clamps etc.) refer to the Flue Installation Guide supplied in the literature pack. © Baxi Heating UK Ltd 2011...

  • Page 21: Installation

    Flushing Flushing Tube 1. Connect a tube to the heating flow or return pipe (Fig. 20). 2. Flush thoroughly (see System Details, Section 6.2). Central Heating Flow Fig. 20 Central Heating Return © Baxi Heating UK Ltd 2007...
  • Page 22 Outlet Connection 3. The boiler condensate trap should be primed by pouring approximately 300ml of water into the flue spigot. Do not Rubber Hose Fig. 23 allow any water to fall into the air inlet. © Baxi Heating UK Ltd 2011...
  • Page 23 9. Using the clearance holes in the Connection Assembly secure it to the Terminal Assembly using the screws Fig. 26 supplied (Fig. 28). ‘TOP’ Label Securing Screw Sealing Tape Fig. 28 Fig. 27 ‘TOP’ Label © Baxi Heating UK Ltd 2011...
  • Page 24 13. Make good between the wall and air duct outside the building, appropriate to the wall construction and fire rating. 14. If necessary fit a terminal guard (see Section 8.4). Fig. 30 Slots at bottom Fig. 31 © Baxi Heating UK Ltd 2011...

  • Page 25: De-Aeration

    No measurement of the combustion is necessary. The measurement of the CO is not essential but if taken the results can be recorded in the Benchmark Document. The air/gas ratio valve is not adjustable. © Baxi Heating UK Ltd 2011...

  • Page 26: Electrical (Includes Details Of Low Voltage Room Unit Connection Etc.)

    1. Prior to commissioning the boiler preliminary electrical Boiler system checks should be carried out. Mains Voltage 2. These should be performed using a suitable meter, and Terminal include checks for Earth Continuity, Block Resistance to Earth, Short Circuit and Polarity. © Baxi Heating UK Ltd 2011...
  • Page 27 – in which case the standard screen displays the room temperature. 4. If the i-THINK Controller is to be used as a room unit it must be programmed so that the appliance will recognise it as such. © Baxi Heating UK Ltd 2011...
  • Page 28 MUST be connected to Terminal M2. Boiler 2. Where used, the Outdoor Sensor must be connected to Terminals 4 & 5 of M2. Other Baxi Low Voltage control Voltage accessories must be connected to terminals 1, 2 & 3 of M2:-...
  • Page 29 Turn the Selector Button until this number corresponds with the desired curve on the graph opposite. 7. Press to confirm and to exit. © Baxi Heating UK Ltd 2011...

  • Page 30: Commissioning

    Control Box removed for clarity 6. Turn the gas supply on and purge according to in GB BS 6891 and in IE I.S. 813 "Domestic Gas Installations". Test for gas Fig. 42 tightness. Pressure Gauge © Baxi Heating UK Ltd 2011...
  • Page 31 3. Ensure that this inlet pressure can be obtained with all other Control Box removed for clarity gas appliances in the property working. (continued on next page) Fig. 43 Inlet Gas Pressure Test Point Diverter Valve Motor Retaining Clip Hall Effect Sensor Fig. 43a © Baxi Heating UK Ltd 2011...
  • Page 32 11. For IE, it is necessary to complete a “Declaration of Conformity” to indicate compliance with I.S. 813. An example 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...

  • Page 33: Completion

    Fig. 44 7. Advise the user that they may observe a plume of vapour from the flue terminal, and that it is part of the normal operation of the boiler. © Baxi Heating UK Ltd 2011...

  • Page 34: Servicing

    4. Disconnect the condensate drain pipe and unscrew the sump from the bottom of the condensate trap assembly (Fig. 46). Condensate Remove any deposits from the sump and trap. Clean as Drain Pipe necessary and replace the sump. © Baxi Heating UK Ltd 2011...
  • Page 35 Use the Selector Button to scroll to ‘Commissioning Menu’, press and scroll to ‘Service/Special Fig. 50 Operation’. Filter 4. Press the Selector Button to reset the service timer and Fig. 49 press to exit. DHW Isolation Cock © Baxi Heating UK Ltd 2011...

  • Page 36: Changing Components

    - see Section 15.1. 5. If satisfactory combustion readings are not obtained Spark ensure the electrode position is correct and perform the Ignition combustion check again. Electrode Electrode Leads Flame Sensing Electrode Fig. 52 © Baxi Heating UK Ltd 2011...
  • Page 37 Venturi position) and fit the new venturi, replacing the seal if necessary. 5. Examine the gasket and replace if necessary. 6. Reassemble in reverse order. Fig. 53 Gas Feed Pipe Venturi Gasket Fig. 54 © Baxi Heating UK Ltd 2011...
  • Page 38 Keep the insulation vertical and press firmly into position. 8. Examine the cover seal and replace if necessary. Reassemble in reverse order. Air/Gas Collector Spark Ignition Electrode Cover Insulation Seal Fig. 56 Electrode Flame Sensing Leads Electrode © Baxi Heating UK Ltd 2011...
  • Page 39 3. Prise off the spring clip and remove the sensor. Examine Sensor the ‘O’ ring, replacing if necessary. DHW NTC Sensor Pump, Gas Valve 4. Reassemble in reverse order. Assemblies and Pipework removed for clarity Fig. 59 © Baxi Heating UK Ltd 2011...
  • Page 40 2. The automatic air vent is a bayonet fitting. Remove by twisting anticlockwise. 3. Fit the new automatic air vent, ensuring the ‘O’ ring is fitted and the cap is open . Reassemble in reverse order. Fig. 61 © Baxi Heating UK Ltd 2011...
  • Page 41 Fig. 62 integrity of the case seal. ‘O’ ring seal Fig. 65 Grub Screw Pressure Gauge Safety Pressure Capillary Relief Valve Fig. 63 Discharge Pipe © Baxi Heating UK Ltd 2011...
  • Page 42 6. Remove the valve assembly. Examine all seals and washers, replacing if necessary. Transfer the DHW NTC and hydraulic pressure sensor to the new valve and reassemble in reverse order. © Baxi Heating UK Ltd 2011...
  • Page 43 P.C.B. Bridge. Transfer the bridge harness to the new P.C.B. Bridge. Control Box Cover 5. Reassemble in reverse order and check the operation of the boiler. P.C.B. P.C.B. Bridge Fig. 68 i-THINK Controller © Baxi Heating UK Ltd 2011...
  • Page 44 4. Whilst supporting the vessel undo and remove the locknut securing the vessel spigot to the boiler top panel. 5. Manoeuvre the vessel out of the boiler. 6. Reassemble in reverse order. Support Bracket Fig. 70 © Baxi Heating UK Ltd 2011...

  • Page 45: Combustion

    Controller stop function 9. Press the Selector Button to turn off. Chimney sweep function off will appear briefly and then wait until the display screen is shown. 04. November 2008 08:50 Tuesday 1.6 bar © Baxi Heating UK Ltd 2011...

  • Page 46: Schematic Wiring

    Key To Wiring Colours b - Blue r - Red bk - Black g - Green br - Brown g/y - Green/Yellow w - White y - Yellow gr - Grey p - Purple © Baxi Heating UK Ltd 2011...

  • Page 47: Short Parts List

    Pump Automatic Air Vent 720777601 Hydraulic Pressure Sensor 720789001 Pressure Gauge 720910601 Flue Sensor 720851401 PCB 28 720912001 PCB 33 720912201 PCB 40 720912401 Venturi 28 720909201 Venturi 33 720909401 Venturi 40 720909601 Igniter 720913201 © Baxi Heating UK Ltd 2011...

  • Page 48: Fault Finding

    3. By 'Resetting' when:- 110, 125, 133, 128 & 384 are displayed it is possible to relight the boiler. 4. If this does not have any effect, or the codes are displayed regularly further investigation is required. © Baxi Heating UK Ltd 2011...
  • Page 49 Go to section ‘K’ Heating circuit Check CH NTC sensor. Burner modulates to maintain set temperature Go to section ‘D’ Go to section ‘M’ 130 flashing Fan stops after 10 seconds Boiler operation correct Burner goes out © Baxi Heating UK Ltd 2011...
  • Page 50 Domestic Hot Water circuit Burner modulates to maintain Check CH NTC sensor. set temperature Go to section ‘D’ Go to section ‘M’ 130 flashing Fan stops after 10 seconds Boiler operation correct Burner goes out © Baxi Heating UK Ltd 2011...
  • Page 51 10kΩ @ 25° C (DHW and CH sensors) Replace sensor (resistance reduces with increase in temp.) Gas at burner Ensure gas is on and purged Check wiring and PCB - X36 connector Replace gas valve see Wiring Diagram Replace PCB © Baxi Heating UK Ltd 2011...
  • Page 52 Check for and correct any faulty system faults Allow to cool. Continuity across thermostat terminals Replace safety thermostat more than 1.5 ohm Check Flow & Return Sensors - 110 still flashing ? see section ‘D’ Replace PCB © Baxi Heating UK Ltd 2011...
  • Page 53 Cold resistance approximately 10kΩ @ 25° C (CH sensor) Replace sensor 20kΩ @ 25° C (Flue sensor) (resistance reduces with increase in temp.) If pump is running the heat exchanger could be Replace heat exchanger obstructed © Baxi Heating UK Ltd 2011...

  • Page 54: Benchmark Checklist

    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.

  • Page 55: Service Record

    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.

  • Page 56: Baxi Heating Uk Ltd

    A T r a d in g D i v i s i o n o f B ax i H eat i ng U K L td ( 38 79 15 6) Brooks House, Coventry Road, Warwick. CV34 4LL After Sales Service 0844 871 1525 Technical Enquiries 0844 871 1555 Website www.baxi.co.uk e&oe UK Comp N 720633602 (9/11) © Baxi Heating UK Ltd 2011...

This manual is also suitable for:

Platinum 2 combi 33 gaPlatinum 2 combi 40 ga

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