Baxi Platinum 2 Combi 28 GA, Platinum 2 Combi 33 GA, Platinum 2 Combi 40 GA Installation & Servicing Instructions Manual

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Page 1

Platinum 2 Combi GA Range

Gas Fired Wall Mounted Condensing

Combination Boiler

Installation & Servicing Instructions

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.

Page 2

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:

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.

The Benchmark Scheme

Benchmark places responsibilities on both manufacturers and installers. The purpose is to ensure that customers are provided with the correct equipment for their needs, that it is installed, commissioned and serviced in accordance with the manufacturer’s instructions by competent persons and that it meets the requirements of the appropriate Building Regulations. The Benchmark Checklist can be used to demonstrate compliance with Building Regulations and should be provided to the customer for future reference.

Installers are required to carry out installation, commissioning and servicing work in accordance with the Benchmark Code of Practice which is available from the Heating and Hotwater Industry Council who manage and promote the Scheme. Visit www.centralheating.co.uk for more information.

0085

ISO 9001

FM 00866

Natural Gas

Baxi Platinum 2 Combi 28 GA

G.C.No 47-075-61

Baxi Platinum 2 Combi 33 GA

G.C.No 47-075-62

Baxi Platinum 2 Combi 40 GA

G.C.No 47-075-63

Building Regulations and the Benchmark Commissioning Checklist

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.

The Health & Safety Executive operates the ‘Gas Safe Register’, a self-certification scheme for gas heating appliances.

These arrangements represent a change from the situation whereby compliance with Building Regulations was accepted as being demonstrated by completion of the Benchmark Logbook (which was then left on site with the customer).

With the introduction of Self Certification Schemes, the Benchmark Logbook is being withdrawn. However, a similar document in the form of a commissioning checklist and service interval record is incorporated at the back of these instructions.

This company is a member of the Benchmark initiative and fully supports the aims of the programme. Its aim is to improve the standards of installation and commissioning of central heating systems in the UK and to encourage the regular servicing of all central heating systems to ensure safety and efficiency.

Building Regulations require that installations should comply with manufacturer's instructions. It is therefore important that the commissioning checklist is completed by the installer. The relevant section of Building Regulations only relates to dwellings. Therefore the checklist only applies if the appliance is being installed in a dwelling or some related structure.

The flowchart opposite gives guidance for installers on the process necessary to ensure compliance with Building Regulations.

Page 3

Installer Notification Guidelines

Choose Building

Regulations Notification

Route

Contact your relevant Local

Authority Building Control

(LABC) who will arrange

an inspection or contact a government approved

inspector

LABC will record the data

and will issue a

certificate of compliance

‘Gas Safe Register’ will issue a

Building Regulations Compliance

Certificate to the property owner

and inform the relevant LABC

You must ensure that the

certificate number issued by

the ‘Gas Safe Register’ is written

onto the Benchmark Checklist

Scheme Members only

Call ‘Gas Safe Register’ on:

0800 408 5577

or log onto:

www.gassaferegister.co.uk

within 10 days

If you notify via the ‘Gas Safe

the Building Regulations

certificate on members’ behalf

Complete the

Benchmark Checklist

Install and Commission this appliance to manufacturer's

instructions

Competent Person's

Self Certification Scheme

Building Control

Complete the

Benchmark Checklist

Install and Commission this appliance to manufacturer's

instructions

Page 4

Legislation

Codes of Practice - refer to the most recent version

IMPORTANT - Installation, Commissioning, Service & Repair

This appliance must be installed in accordance with the manufacturer’s instructions and the regulations in force. Read the instructions fully before installing or using the appliance.

In GB, this must be carried out by a competent person as stated in the Gas Safety (Installation & Use) Regulations.

Definition of competence: A person who works for a Gas Safe registered company and holding current certificates in the relevant ACS modules, is deemed competent.

In IE, this must be carried out by a competent person as stated in I.S. 813 “Domestic Gas Installations”.

The addition of anything that may interfere with the normal operation of the appliance without express written permission from the manufacturer or his agent could invalidate the appliance warranty. In GB this could also infringe the Gas Safety (Installation and Use) Regulations.

Warning - Check the information on the data plate is compatible with local supply conditions.

This company declares that no substances harmful to health are contained in the appliance or used during appliance manufacture.

The appliance is suitable only for installation in GB and IE and should be installed in accordance with the rules in force, and only used in a suitably ventilated location.

In GB, the installation must be carried out by a Gas Safe Registered Installer. It must be carried out in accordance with the relevant requirements of the:

• Gas Safety (Installation & Use) Regulations.

• The appropriate Building Regulations either The Building Regulations, The Building Regulations (Scotland), Building Regulations (Northern Ireland).

• The Water Fittings Regulations or Water Byelaws in Scotland.

• The Current I.E.E. Wiring Regulations.

Where no specific instructions are given, reference should be made to the relevant British Standard Code of Practice.

In IE, the installation must be carried out by a competent Person and installed in accordance with the current edition of I.S. 813 ‘Domestic Gas Installations’, the current Building Regulations and reference should be made to the current ETCI rules for electrical installation.

All systems must be thoroughly flushed and treated with inhibitor (see section 6.2).

The boiler meets the requirements of Statutory Instrument “ The Boiler (Efficiency) Regulations 1993 N

3083” and is deemed to meet the requirements of Directive 92/42/EEC on the energy efficiency requirements for new hot water boilers fired with liquid or gaseous fuels:-

Type test for purpose of Regulation 5 certified by: Notified Body 0085.

Product/Production certified by: Notified Bodies 0086.

For GB/IE only.

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.uk

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. BS 5440 Part 2 Ventilation. BS 7074 Expansion vessels and ancillary equipment for

sealed water systems. BS 7593 Treatment of water in domestic hot water

central heating systems.

In IE the following Codes of Practice apply: Standard Scope

I.S. 813 Domestic Gas Installations. The following standards give valuable additional information; BS 5546 Installation of hot water supplies for domestic

purposes. BS EN 12828 Heating systems in buildings. 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.

Page 5

Safe Manual 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.

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 physically able.

Wear appropriate Personal Protection Equipment e.g. protective gloves, safety footwear etc.

Preparation

Co-ordinate movements - know where, and when, you are both going.

Minimise the number of times needed to move the boiler - plan ahead.

Always ensure when handling or lifting the route is clear and unobstructed. If possible avoid steps, wet or slippery surfaces, unlit areas etc. and take special care on ladders/into lofts.

Technique

When handling or lifting always use safe techniques - keep your back straight, bend your knees. Don’t twist - move your feet, avoid bending forwards and sideways and keep the load as close to your body as possible.

Where possible transport the boiler using a sack truck or other suitable trolley.

Always grip the boiler firmly, and before lifting feel where the weight is concentrated to establish the centre of gravity, repositioning yourself as necessary. See the ‘Installation’ section of these instructions for recommended lift points.

Remember

The circumstances of each installation are different. Always asses the risks associated with handling and lifting according to the individual conditions.

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 !!

Page 6

CONTENTS

1.0 Introduction 7

2.0 General Layout 8

3.0 Appliance Operation 9

4.0 Technical Data 10

5.0 Dimensions and Fixings 11

6.0 System Details 12

7.0 Site Requirements 15

8.0 Flue Options 19

9.0 Installation 21

10.0 De-Aeration 25

11.0 Electrical (includes details of Low Voltage

Room Unit connection etc.) 26

12.0 Commissioning 30

13.0 Completion 33

14.0 Servicing 34

15.0 Changing Components 36

16.0 Combustion 45

17.0 Schematic Wiring 46

18.0 Short Parts List 47

19.0 Fault Finding 48

Benchmark Checklist 54

Section Page

Page 7

1.0 Introduction

Fig. 1

1.1 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 :-

28 model - 28 kW DHW

25.9 kW CH (Condensing)

33 model - 33 kW DHW

30.3 kW CH (Condensing)

40 model - 40 kW DHW

33.6 kW CH (Condensing)

3. It is designed for use on Natural Gas (G20) ONLY.

4. The boiler is suitable for use only on fully pumped sealed heating systems. Priority is given to domestic hot water.

5. The boiler data badge gives details of the model, serial number and Gas Council number and is situated on the inner door panel. It is visible when the case front panel is removed (Fig. 2).

6. The boiler is intended to be installed in residential / commercial / light industrial E.M.C. environments on a governed meter supply only.

7. The boiler must be installed with one of the purpose designed flues such as one of the standard horizontal telescopic flue kits detailed in the Flue Installation Guide .

8. All systems must be thoroughly cleansed, flushed and

treated with inhibitor (see section 6.2).

1.2 Optional Extras

Various low voltage external controls are available as optional extras. Full details are contained in the relevant sales literature.

1.3 Contents of Pack

The pack contains:-

• Boiler

• Wall Plate inc. Taps

• Template

• Fittings & Literature Pack

NOTE: These Installation & Servicing Instructions MUST be read in conjunction with the Flue Installation Guide supplied in the Literature Pack.

i-THINK

Controller

Fig. 2

Data Badge

Page 8

2.0 General Layout

2.1 Layout

1. Expansion Vessel

2. Expansion Vessel Valve (N.B. NOT air vent !)

3. Primary Heat Exchanger

4. DHW Plate Heat Exchanger

5. Pump with Automatic Air Vent

6. Central Heating System Pressure Gauge

7. Fan Assembly

8. Air/Gas Collector

9. Ignitor

10. Flame Sensing Electrode

11. Spark Ignition Electrode

12. Combustion Box Cover & Burner

13. Control Box Display

14. Condensate Trap

15. Safety Pressure Relief Valve

16. Drain Off Point

17. Gas Valve

18. Diverter Valve Motor

19. i-THINK Controller

20. Air Box (28 kW model ONLY)

Item 20 is on 28 kW model only. All illustrations show 33/40 models.

Page 9

3.0 Appliance Operation

3.1 Central Heating Mode

1. With a demand for heating, the pump circulates water through the primary circuit.

2. Once main burner ignites the fan speed controls the gas rate to maintain the heating temperature measured by the temperature sensor.

3. When the flow temperature exceeds the setting temperature, a 3 minute delay occurs before the burner relights automatically (anti-cycling). The pump continues to run during this period.

4. When the demand is satisfied the burner is extinguished and the pump continues to run for a period of 3 minutes (Pump Overrun).

3.2 Domestic Hot Water Mode

1. Priority is given to the domestic hot water supply. A demand at a tap or shower will override any central heating requirement.

2. The flow of water will operate the Hall Effect Sensor which requests the 3 way valve to change position. This will allow the pump to circulate the primary water through the DHW plate heat exchanger.

3. The burner will light automatically and the temperature of the domestic hot water is controlled by the temperature sensor.

4. When the domestic hot water demand ceases the burner will extinguish and the diverter valve will remain in the domestic hot water mode, unless there is a demand for central heating.

3.3 Frost Protection Mode

1. The frost protection mode is integral to the appliance and functions as long as there is power and gas supplied to the boiler. If the system temperature falls below 5° C then the boiler will fire on its minimum setting until a flow temperature of 30° C is reached. Further protection can be incorporated by using a system frost thermostat.

3.4 Pump Protection

1. The pump will automatically operate for 1 minute in every 24 hours to prevent sticking.

Key

1. Pump with Automatic Air Vent

2. Boiler Drain Tap

3. Pressure Gauge

4. Safety Pressure Relief Valve

5. DHW Flow Sensor/Filter/Restrictor*

6. Domestic Hot Water Priority Sensor

7. Domestic Hot Water NTC Sensor

8. Hydraulic Pressure Switch

9. Three Way Valve & Motor

10. Plate Heat Exchanger

11. Gas Valve

12. Safety Thermostat

*On 40kW models the restrictor is in the Cold Water Inlet connection

13. Heating Flow Sensor

14. Flue Sensor

15. Boiler Adaptor

16. Primary Heat Exchanger

17. Spark Ignition Electrode

18. Burner

19. Flame Sensing Electrode

20. Air/Gas Collector

21. Heating Return Sensor

22. Fan

23. Air/Gas Venturi

24. Expansion Vessel

Fig. 3

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

Page 10

4.0 Technical Data

200 400 600 800 1000 1200

0.5

1.5

2.5

3.5

Metre (wg)

Flow Rate (l/h)

5.5

4.5

Pump - Available Head

Maximum

Minimum

4.1

Flue Terminal Diameter 100mm Dimensions Projection 125mm

Outercase Dimensions

Casing Height - 763mm Overall Height Inc Flue Elbow - 923mm Casing Width - 450mm Casing Depth - 353mm

Central Heating Primary Circuit Pressures

bar Safety Discharge 3 Max Operating 2.5 Min Operating 0.5 Recommended Operating Range 1-2

DHW Circuit bar Pressures

Max Operating 8 Min Operating 0.15

Pump

Available Head See graph below

Expansion Vessel - (For Central Heating only. Integral with appliance)

bar

Min Pre-charge Pressure 0.5

(28) (33 & 40)

litre litre Max Capacity of CH System 125 155

Primary Water Content of Boiler (unpressurised) 2.5 2.8

Connections copper tails Gas Supply - 22mm Heating Flow - 22mm Heating Return - 22mm Cold Water Inlet - 15mm Hot Water Outlet - 15mm Pressure Relief Discharge - 15mm

Temperatures

C.H. Flow Temp (adjustable)

25°C to 80°C max (± 5°C)

D.H.W. Flow Temp (adjustable)

35°C to 60°C max (± 5°C) dependent upon flow rate

NOxClass 5

Heat Input CH (Net) Max Min

28 model kW 24 2.9 33 model kW 28 3.4 40 model kW 32 4.1

Heat Output CH (Non-Condensing)

Max Min 28 model kW 24 2.4 33 model kW 28 2.8 40 model kW 32 4.0

Electrical Supply 230V~ 50H

(Appliance must be connected to an earthed supply)

Electrical Protection

IPX5D

Internal Fuse Rating F2L

Heat Output CH (Condensing)

Max Min 28 model kW 25.3 3.1 33 model kW 29.6 3.6 40 model kW 33.8 4.4

Heat Input DHW (Net) Max 28 model kW 28.9 33 model kW 34.0 40 model kW 41.2

Heat Output DHW Max 28 model kW 28 33 model kW 33 40 model kW 40

Condensate Drain

To accept 21.5mm (3/4in) plastic waste pipe

External Fuse Rating 3A

Appliance Category CAT I

Appliance Type C

13 C33 C43 C53

Inlet Pressure (Natural Gas - G20)

mbar 20

Max Gas Rate (Natural Gas - G20)

(After 10 mins) 28 model m3/h 2.96 33 model m3/h 3.49 40 model m3/h 4.23

NOTE: All data in this section are nominal values and subject to normal production tolerances.

SAP 2005 Seasonal Efficiency is 91.1%

SAP 2009 Annual Efficiency is 89%

This value is used in the UK Government’s Standard

Assessment Procedure (SAP) for energy rating of

dwellings. The test data from which it has been calculated

has been certified by 0087.

SEDBUK Declaration

Power Consumption

28 model W 135 33 model W 145 40 model W 140

Clearances

Above Casing 175 mm Min Below Casing 150 mm* Min Front 450 mm Min

(For Servicing)

Front 5 mm Min (In Operation) L.H. Side 5 mm Min R.H. Side 5 mm Min

*This is MINIMUM recommended dimension. Greater clearance will aid installation and maintenance.

Weights

(28)

Packaged Boiler Carton 43kg Installation Lift Weight 37kg

(33)

Packaged Boiler Carton 44.5kg Installation Lift Weight 38.5kg

(40)

Packaged Boiler Carton 45.5kg Installation Lift Weight 39.5kg

Flow Rates (28) (33) (40)

l/min l/min l/min DHW Flow Rate @ 30o C Rise 12.9 15.3 18.3

DHW Flow Rate @ 35o C Rise 11.5 13.5 16.4

Min Working DHW Flow Rate 2 2 2

IMPORTANT: Where Low Flow Taps or Fittings are intended to be used in the DHW system connected it is strongly recommended that the DHW flow rate DOES NOT fall below 2.5l/min. This will ensure reliable operation of the DHW function.

Pump

Page 11

5.0 Dimensions and Fixings

Dimensions

A 763mm

B 353mm when i-THINK

controller fitted (345 without)

C 450mm

D 116mm Ø Min.

E 160mm

(207mm for 80/125mm flue systems)

F 135mm

G 106mm

H 170mm

J 280mm

360° Orientation

Tube Ø 100mm

At least 1.5°

Pressure

Relief Valve

(15mm)

Condensate

Drain

65 mm 65 mm 65 mm 65 mm45 mm50 mm

95 mm

Hot Water

Outlet

(15mm)

Cold Water

Inlet

(15mm)

Heating

Return

(22mm)

Heating

Flow

(22mm)

Gas Inlet

(22mm)

Boiler

Side

Boiler

Side

Tap Rail

Page 12

6.0 System Details

6.1 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).

a) IRN 001 - See text of entry for installation

requirements and notes.

b) IRN 302 - Byelaw 14.

2. Reference to the WRc publications, ‘Water fittings and materials directory’ and ‘Water supply byelaws guide’ give full details of byelaws and the IRNs.

6.2 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. Treatment must involve the use of a proprietary cleanser, such as Sentinel X300 or X400, or Fernox F3 and an inhibitor such as Sentinel X100 or Fernox MB-1.

3. Full instructions are supplied with the products, for further information contact Sentinel (0800 389 4670) or Fernox (0870 870 0362).

Failure to flush and add inhibitor to the system will invalidate the appliance warranty.

4. It is important to check the inhibitor concentration after installation, system modification and at every service in accordance with the inhibitor manufacturer’s instructions. (Test kits are available from inhibitor stockists.)

5. For information or advice regarding any of the above contact Technical Enquiries 0844 871 1555.

6.3 Bypass

1. The boiler is fitted with an automatic integral bypass. Some systems may require an additional external bypass.

6.4 System Control

1. Further external controls (e.g. room thermostat or sensors) MUST be fitted to optimise the economical operation of the boiler in accordance with Part L of the Building Regulations (2010). A range of optional controls is available. Full details are contained in the relevant Sales Literature.

Page 13

6.0 System Details

Fig. 4

Fig. 6

Pressure Relief Valve

Discharge Pipe

Fig. 5

6.5 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. The filling method adopted must be in accordance with all relevant water supply regulations and use approved equipment.

4. Your attention is drawn to: for GB: Guidance G24.2 and recommendation R24.2 of the Water Regulations Guide. for IE: the current edition of I.S. 813 “Domestic Gas Installations”.

5. The sealed primary circuits may be filled or replenished by means of a temporary connection between the circuit and a supply pipe, provided a ‘Listed’ double check valve or other similarly effective backflow prevention device is permanently connected at the inlet to the circuit and the temporary connection is removed after use.

6.6 Expansion Vessel (Central Heating only)

1. The appliance expansion vessel is pre-charged to 0.5 bar. Therefore, the minimum cold fill pressure is 0.5 bar. The vessel is suitable for correct operation for system capacities up to 125 litres (28) or 155 litres (33/40). For greater system capacities an additional expansion vessel must be fitted. For GB refer to BS 7074 Pt 1. For IE, the current edition of I.S. 813 “Domestic Gas Installations”.

6.7 Safety Pressure Relief Valve (Fig. 6)

1. The pressure relief valve 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 dia, run continuously downward, and discharge outside the building, preferably over a drain. It should be routed in such a manner that no hazard occurs to occupants or causes damage to wiring or electrical components. The end of the pipe should terminate facing down and towards the wall (Fig. 6a).

3. The discharge must not be above a window, entrance or other public access. Consideration must be given to the possibility that boiling water/steam could discharge from the pipe.

4. A remote relief valve kit is available to enable the boiler to be installed in cellars or similar locations below outside ground level (kit no. 5121379).

5. A boiler discharge pump is available, part no. 720648301. This pump will dispose of both condensate & high temperature water from the relief valve. It has a maximum head of 5 metres.

Control Box removed for clarity

Filling Loop Connections (Loop supplied with Boiler)

Stop Valve

Double Check Valve

Cold Water Mains Inlet

CH Return

Temporary Loop

Stop Valve

The end of the pipe should terminate facing down and towards the wall.

Fig. 6a

Page 14

6.0 System Details

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 water supply due to thermal expansion. However this type of instantaneous combination boiler, with less than 15 litres of stored capacity, does not require any backflow prevention device as any thermal expansion is accommodated within the appliance. It is possible in certain circumstances that other cold water demands (e.g. washing machines, flushing of W.C.s) may affect the DHW function of the boiler. In these instances the fitting of a backflow prevention device and expansion vessel is recommended.

4. Also if there is an existing check valve, loose jumpered stop cock, water meter or water treatment device already fitted to the wholesome water supply connected to the boiler domestic hot water (DHW) inlet supply then a suitable expansion device may be required.

5. The boiler’s maximum working mains pressure is 8 bar, therefore all pipework, connections, fittings, etc. should be suitable for pressures in excess of 8 bar. A pressure reducing valve must be fitted for pressures in excess of 8 bar. The manufacturer of any outlet fittings, such as a shower valve, may require a lower maximum pressure. The pressure reduction must take account of all fittings connected to the DHW system.

6.9 Showers

1. If a shower control is supplied from the appliance it should be of the thermostatic or pressure balanced type. Thermostatic type shower valves provide the best comfort and guard against water at too high a temperature. Existing controls may not be suitable - refer to the shower valve manufacturer.

6.10 Hard Water Areas

1. If the area of the installation is recognised as a HARD WATER AREA then a suitable device should be fitted to treat the mains water supply to the boiler. Contact your Water Distribution Company for advice on suitable devices.

Boiler

Other Tap Outlets

Expansion Vessel*

To Hot Taps

Check Valve*

Pressure Reducer Valve*

Stop Tap

Fig. 7

*See 6.8 for instances when these items may be required

IMPORTANT: Where Low Flow Taps or Fittings are intended to be used in the DHW system connected to a Baxi Platinum Combi GA it is strongly recommended that the DHW flow rate DOES NOT fall below 2.5l/min. This will ensure reliable operation of the DHW function.

Page 15

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. 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 7.3).

2. Where the boiler is sited in an unheated enclosure and during periods when the heating system is to be unused it is recommended that the permanent live is left on to give BOILER frost protection. NOTE: THIS WILL NOT PROTECT THE SYSTEM !

3. If the boiler is fitted in a room containing a bath or shower reference must be made to the relevant requirements. In GB this is the current I.E.E. Wiring Regulations and Building Regulations. In IE reference should be made to the current edition of I.S. 813 “Domestic Gas Installations” and the current ETCI rules.

4. If the boiler is to be fitted into a building of timber frame construction then reference must be made to the current edition of Institute of Gas Engineers Publication IGE/UP/7 (Gas Installations in Timber Framed Housing).

7.2 Clearances (Figs. 8 & 9)

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.

7.3 Ventilation of Compartments

1. Where the appliance is installed in a cupboard or compartment, no air vents are required.

2. BS 5440: Part 2 refers to room sealed appliances installed in compartments. The appliance will run sufficiently cool without ventilation.

150mm* Min

763mm

450mm

175 mm Min (300mm

Min if using 80/125mm

flueing system)

5mm Min

450mm Min

For Servicing

Purposes

Fig. 8

Fig. 9

In Operation

5mm Min

At least 1.5°

353mm*

*345 when i-THINK

controller removed

Page 16

7.0 Site Requirement

7.4 Gas Supply

1. The gas installation should be in accordance with the relevant standards. In GB this is BS 6891 or in IE 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. 10).

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 (22mm).

7.5 Electrical Supply

1. External wiring must be correctly earthed, polarised and in accordance with relevant regulations/rules. In GB this is the current I.E.E. Wiring Regulations. In IE reference should be made to the current edition of ETCI rules.

2. The mains supply is 230V ~ 50Hzfused at 3A.

NOTE: The method of connection to the electricity supply must facilitate complete electrical isolation of the appliance.

Connection may be via a fused double-pole isolator with a contact separation of at least 3mm in all poles and servicing the boiler and system controls only.

7.6 Bath & Shower Rooms

1. If the boiler is fitted in a room containing a bath or shower it can be fitted in zone 2, (Figs. A & B shows zone dimensions for a bathtub. For other examples refer to the Current I.E.E. Wiring Regulations) reference must be made to the relevant requirements. In GB this is the current I.E.E. Wiring Regulations and Building Regulations. In IE reference should be made to the current edition of I.S. 813 “Domestic Gas Installations” and the current ETCI rules.

Fig. 10

Gas Service Cock

Zone 2

Zone 1

Zone 0

Zone 2

Window Recess

0.6 m

Ceiling

Outside Zones

Zone 2

Zone 1

Zone 0

2.25 m

Window Recess Zone 2

0.6 m

Fig. A

Fig. B

In GB Only

Page 17

7.0 Site Requirements

Boiler

2.5° Minimum fall

Termination to an internal soil and

vent pipe

450mm min

Boiler

2.5° Minimum fall

External termination via internal discharge

branch

e.g sink waste - downstream

Sink

Pipe must terminate above water level but below surrounding surface

Boiler

Pipe must terminate above water level but below surrounding surface

2.5° Minimum fall

Termination to a drain or gully

Boiler

500mm min

2.5° Minimum fall

Termination to a purpose made

soak-away

Holes in the soak-away must face away from the building

50mm per metre of pipe run

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.

The condensate discharge pipe MUST NOT RISE at any point along its length. There MUST be a fall of AT LEAST 2.5° (50mm per metre) along the entire run.

1. The condensate outlet will accept 21.5mm (3/4in) 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 & Part H1 of the Building Regulations give further guidance.

3. The discharge pipe should be run in a proprietary drain pipe material e.g. PVC, PVC-U, ABS, PVC-C or PP.

4. Metal pipework is NOT suitable for use in condensate discharge systems.

5. The pipe should be a minimum of 21.5mm diameter and must be supported using suitably spaced clips to prevent sagging.

6. It is advisable that the full length of condensate pipe is run

internally and preferably be less than 3 metres.

7. Internal runs greater than 3 metres or runs in cold areas should use 32mm waste pipe.

8. External runs MUST be a MINIMUM of 32mm and fully insulated.

9. If the boiler is fitted in an unheated location the entire condensate discharge pipe should be treated as an external run.

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.

11. When discharging condensate into a soil stack or waste pipe the effects of existing plumbing must be considered. If soil pipes or waste pipes are subjected to internal pressure fluctuations when WC's are flushed or sinks emptied then back-pressure may force water out of the boiler trap and cause appliance lockout.

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) iii) to a drain or gully iv) to a purpose made soakaway

Page 18

7.0 Site Requirements

7.8 Flue

NOTE: 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.

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”.

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. If a terminal is less than 2 metres above a balcony, above

ground or above a flat roof to which people have access, then a suitable terminal guard must be provided.

IMPORTANT:

• 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.

*4. Reduction to the boundary is possible down to 25mm but flue deflector part no. 5111068 must be used.

J,K

D E

Likely flue positions requiring a flue terminal guard

J,K

Fig. 12

Fig. 11

300 min

Terminal Assembly

Top View Rear Flue

Property Boundar y Line

Terminal Position with Minimum Distance (Fig. 12) (mm)

A1Directly below an opening, air brick, opening

windows, etc. 300 B1Above an opening, air brick, opening window etc. 300 C1Horizontally to an opening, air brick, opening window etc. 300 D2Below gutters, soil pipes or drain pipes. 25 (75) E2Below eaves. 25 (200) F2Below balconies or car port roof. 25 (200) G2From a vertical drain pipe or soil pipe. 25 (150) H2From an internal or external corner. 25 (300) I Above ground, roof or balcony level. 300 J From a surface or boundary line facing a terminal. 600 K From a terminal facing a terminal (Horizontal flue). 1200

From a terminal facing a terminal (Vertical flue). 600 L From an opening in carport (e.g. door, window)

into the dwelling. 1200 M Vertically from a terminal on the same wall. 1500 N Horizontally from a terminal on the same wall. 300 R From adjacent wall to flue (vertical only). 300 S From an adjacent opening window (vertical only). 1000 T Adjacent to windows or openings on pitched and flat roofs 600 U Below windows or openings on pitched roofs 2000

Opening Window or Door

150mm MIN.

IMPORTANT: If fitting a Plume Displacement Flue Kit, the air inlet must be a minimum of 150mm from any opening windows or doors (see Fig. 13).

Plume Displacement Kit

Air Inlet

Fig. 13

In addition, the terminal should be no nearer than 150 mm to an opening in the building fabric formed for the purpose of accommodating a built-in element such as a window frame.

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 shown in brackets, in accordance with 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

Page 19

8.0 Flue Options

Horizontal Flues

(ii)

(i)

Plume Displacement Kit 60 /100 dia 1M Extensions 45° & 93° elbows are also available - see the separate Flue Guide.

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.

(ii)

(i)

This bend is equivalent to 1 metre

Total equivalent length =

A+B+C+2 x 90°Bends

This bend is equivalent to 1 metre

8.1 Horizontal Flue Systems

1. The standard flue is suitable only for horizontal termination applications.

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. Their equivalent lengths are:Concentric Pipes:

135° bend 0.5 metres 93° bend 1.0 metres

5. The elbow supplied with the standard horizontal

telescopic flue kit is not included in any equivalent length calculations.

NOTE: Flue length is measured from point (i) to (ii) as shown.

IMPORTANT SUPPORT - All flue systems MUST be securely supported a MINIMUM of once every metre. It is recommended that every straight piece is supported irrespective of length. Additional supports are available as accessories. VOIDS - Consideration must be given to flue systems in voids and the provision of adequate access for subsequent periodic visual inspection.

6. Read this section in conjunction with the Flue Installation

Guide supplied with the boiler.

Page 20

8.0 Flue Options

Fig. 15

Fig. 16

315mm

500mm

Flue Deflector

Fig. 14

8.2 Flue Lengths

The standard horizontal telescopic flue kit allows for lengths between 315mm and 500mm from elbow to terminal without the need or cutting (Fig. 14). Extensions of 250mm, 500mm & 1m are available.

The maximum permissible equivalent flue length is:

10 metres (60/100 system - vertical & horizontal) 20 metres (80/125 system - vertical & horizontal) 15 metres (80/80 twin pipe)

8 metres (60/100 system - vertical connected

to ridge terminal)

8.3 Flue Trim

1. The flexible flue trims supplied can be fitted on the outer and inner faces of the wall of installation.

8.4 Terminal Guard (Fig. 15)

1. When codes of practice dictate the use of a terminal guard ‘Multifit’ accessory part no. 720627901 can be used (Note: This is not compatible with Flue Deflector referred to below).

2. There must be a clearance of at least 50mm between any part of the terminal and the guard.

3. The flue terminal guard should be positioned centrally over the terminal and fixed as illustrated.

8.5 Flue Deflector (Fig. 16)

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.

8.6 Flue Accessories

1. For full details of Flue Accessories (elbows, extensions, clamps etc.) refer to the Flue Installation Guide supplied in the literature pack.

Page 21

9.0 Installation

Fig. 20

145mm

For Side Flue Exit

Central Heating Return

Flushing Tube

Fig. 18

Fig. 19

Fig. 17

200 mm

Recommended

Pressure

Relief Valve

(15mm)

Condensate

Drain

Part No. 720636602

65 mm 65 mm 65 m m 65 mm

5 mm Minimum Side Clearance

Boiler Mounting Bracket Fixing Slots

116mm Dia Minimum

Aperture For Flue Tube

Side Flue Centre Line

Vertical Flue Centre Line

175 mm Minimum Clearance

Profile of Outercase

Ø 8 mm

177 mm

45 mm

50 mm

95 mm

Part No. 720636602

Hot Water

Outlet (15mm)

Cold Water

Inlet

(15mm)

Heating Return (22mm)

Heating

Flow

(22mm)

Gas Inlet

(22mm)

150 mm Minimum

Clearance

Central Heating Flow

9.1 Unpacking & Initial Preparation

IMPORTANT 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. GAS SUPPLY - The gas supply, gas type and pressure must be checked for suitability before connection (see Section 7.4).

NOTE: A small amount of water may drain from the boiler

in the upright position. If pre-plumbing it will be necessary to turn the carton over to access the wall plate first.

1. Remove staples, open flaps and remove the cardboard

sheet. Remove the polystyrene side pieces and literature. Two people can then lift out the boiler (Fig. 17). Disengage the wall plate from the boiler.

2. After considering the site requirements (see Section 7.0)

position the fixing template on the wall ensuring it is level both horizontally and vertically.

3. Mark the position of the two most suitable fixing slots for

the wall plate and boiler lower fixing holes.

4. Mark the position of the centre of the flue hole (rear exit).

For side flue exit, mark as shown (Fig. 18).

5. If required, mark the position of the gas and water pipes.

Remove the template.

6. Cut the hole for the flue (minimum diameter 116mm).

7. Drill the wall as previously marked to accept the wall plugs

supplied. Secure the wall plate using the fixing screws.

8. Using a spirit level ensure that the plate is level before finally

tightening the screws.

9. Connect the gas and water pipes to the valves on the wall

plate using the copper tails supplied. Ensure that the sealing washers are fitted between the connections.

NOTE: 40kW models ONLY - ensure the flow restrictor is inserted in cold water inlet connection (Fig. 19). On other models the restrictor is factory fitted internally.

10. Fit the filling loop as described in the instructions supplied

with it.

9.2 Flushing

1. Connect a tube to the heating flow or return pipe (Fig. 20).

2. Flush thoroughly (see System Details, Section 6.2).

Flow Restrictor (40 kW model only)

Wall Template

Page 22

9.0 Installation

Fig. 22

Pressure Relief Valve

Discharge Pipe

Fig. 21

Suggested Lifting Points shown as shaded area

Condensate Trap Outlet Connection

Remove Sealing Caps from under the Boiler before lifting into position

Sealing Washers

Control Box removed for clarity

Fig. 23

Boiler Mounting

Bracket

9.3 Fitting The Boiler

1. Remove the sealing caps from the boiler connections.

NOTE: A small amount of water may drain from the boiler once the caps are removed.

2. Lift the boiler as indicated by the shaded areas. The boiler should be lifted by TWO PEOPLE. Engage the mounting bracket at the top rear of the boiler on the wall plate (Fig. 21) (see Safe Manual Handling page 5).

3. Insert the sealing washers between the valves and pipes on

the wall plate and the boiler connections.

4. Tighten all the connections.

9.4 Fitting the Safety Pressure Relief Discharge

Pipe (Fig. 22)

1. Remove the discharge pipe from the kit and 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.

IMPORTANT: Make all soldered joints before connecting to the pressure relief valve. The relief valve is intentionally angled to the right of the boiler. DO NOT adjust the position of the valve. The discharge pipe must be installed before pressurising the system.

3. The pipework must be at least 15mm diameter and run continuously downwards to a discharge point outside the building. See section 6.7 for further details.

4. Utilising one of the sealing washers, connect the discharge pipe to the adaptor and tighten the nut hand tight, plus 1/4 turn to seal.

5. Complete the discharge pipework and route it to the outside discharge point.

9.5 Condensate Drain (see section 7.7) (Fig. 23)

1. Using the short piece of rubber hose supplied, connect the condensate drain pipework to the boiler condensate trap outlet pipe. When connecting the hose, ensure that the condensate sump is not inadvertently unscrewed.

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).

2. The hose will accept 21.5mm (

/4in) 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.

3. The boiler condensate trap should be primed by pouring approximately 300ml of water into the flue spigot. Do not allow any water to fall into the air inlet.

Rubber Hose

Page 23

9.0 Installation

Wall

Thickness

(X)

Wall Thickness

(X)

Fig. 24

Fig. 26

315mm

500mm

Terminal Assembly

Connection Assembly

Fig. 25

Fig. 27

‘Peak’ to be uppermost

Dimension ‘Y’

Securing Screw

Fig. 28

Sealing Tape

‘TOP’ Label

9.6 Fitting The Flue

HORIZONTAL TELESCOPIC FLUE

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.

2. The two sections can be adjusted to provide a length between 315mm and 500mm (Fig. 24) when measured from the flue elbow (there is 50mm engagement into the elbow).

3. Locate the flue elbow on the adaptor at the top of the boiler. Set the elbow to the required orientation (Fig. 25).

NOTE: The flue elbow is angled at 93 degrees to ensure a fall back to the boiler.

4. Measure the distance from the outside wall face to the elbow. This dimension will be known as ‘X’ (Fig. 25).

5. If the distance from the flue elbow to the outside face of the wall (‘X’ in Fig. 25) is less than 250mm the Connection Assembly can be discarded and the Terminal Assembly fitted directly into the elbow.

6. In instances where the dimension ‘X’ (Fig. 25) is between 250mm and 315mm it will be necessary to shorten the Terminal Assembly by careful cutting to accommodate walls of these thicknesses.

7. To dimension ‘X’ add 50mm. This dimension to be known as ‘Y’.

8. Adjust the two telescopic sections to dimension ‘Y’ and seal the joint with the tape provided (Fig. 27). Ensure that the labels marked ‘TOP’ on the Terminal and Connection Assemblies are uppermost.

9. Using the clearance holes in the Connection Assembly secure it to the Terminal Assembly using the screws supplied (Fig. 28).

Page 24

9.0 Installation

Slots at bottom

Fig. 30

Fig. 31

Flue Elbow

Fig. 29

Boiler Adaptor

Apply the lubricant supplied for ease of assembly (do not use any other type).

Ensure Flue Elbow is fully engaged into Boiler Adaptor

Apply the lubricant supplied for ease of assembly (do not use any other type).

Ensure Flue is fully engaged into Elbow

9.6 Fitting the Flue (Cont)

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 (Fig. 29).

11. Draw the flue back through the wall and engage it in the elbow. It may be necessary to lubricate to ease assembly of the elbow and flue (Fig. 30).

12. Ensure that the terminal is positioned with the slots to the bottom (Fig. 31). Secure the flue to the elbow with the screws supplied (Fig. 30).

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, appropriate to the wall construction and fire rating.

14. If necessary fit a terminal guard (see Section 8.4).

Page 25

10.0 De-Aeration

Link wire detail.

Yellow Link

Wire

black

brown

Boiler Terminal Block M1

04. November 2008 08:50 Tuesday

1.5 bar

update

Data

ready

Operator unit

Menu Button

Easy Menu Button

Selector Button (OK Button)

Fig. 33

i-THINK Controller

Fig. 32

10.1 The De-Aeration Process

1. It is recommended that the De-Aeration Process is carried out prior to firing the boiler for the first time, as part of commissioning. This will assist in removing residual air from the boiler.

NOTE: If Low Voltage Controls are to be fitted the Link Wire must be used. However, do NOT connect this link wire across 1 & 2 of terminal block M1 (Fig. 32) until the De-Aeration process has been completed. If the system controls have been wired ensure there is no heat demand before carrying out De-Aeration. The outer case front panel does not need to be

removed to carry out the De-Aeration procedure.

2. Open the mains water supply to the boiler and all hot water taps to purge the DHW system. Ensure that the filling loop is connected and open, then open the heating flow and return valves on the boiler.

3. Open the cap on the automatic air vent on the pump body. The system must be flushed in accordance with BS 7593 (see Section 6.2) and the flushing agent manufacturers instructions.

4. Pressurise the system to 1.5 bar then close and disconnect the filling loop.

5. 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 tightness.

6. Connect the boiler flying lead to a fused spur and turn on the power. On initial power up, ‘Test Mode’ will be displayed briefly followed by ‘Press OK button min 5s’. Press the Selector Button (OK Button) for a minimum of 5 seconds to continue. ‘Data Update’ will be displayed for several minutes whilst the i-THINK controller configures its settings. ‘Operator unit ready’ will be displayed when the process is complete (Fig. 33).

7. Using the Selector Button, select Language (English) and set the Year, Month, Day and Time.

De-Aeration Function

8. Press and hold the and buttons for 6 seconds. Fig. 2. ‘Chimney sweep function’ will be displayed. Turn the Selector Button (Fig. 33) until ‘De-Aeration Function’ is displayed. Press the Selector Button to activate. ‘312 De-Aeration Function’ will be shown. The boiler pump will run for approximately 10 minutes, during which time the diverter valve will switch between heating & hot water. This will assist in venting air from the boiler. All radiators and bleed points must still be vented.

9. If the system pressure drops below 0.5bar during De-Aeration an error symbol ‘E’ will be displayed and the process will stop. The test will restart automatically once the system has been refilled and repressurised. The error will clear from the screen and ‘312 De-Aeration Function’ will reappear. NO BUTTONS ARE TO BE PRESSED. As part of this process the pump may stop for a period before restarting. Once the test is complete the main screen display will reappear.

10. Turn off the power and remove the i-THINK controller. Remove the outer case front panel and refit the i-THINK Controller to the front of the boiler. The display will show ‘Data Update’ for approximately 20 seconds and ‘Operator Unit Ready’ will be displayed. The Operational Gas Inlet Pressure and Gas Rate can now be checked. See Section 12.2 of the boiler manual for details.

IMPORTANT: Gas Rate Measurement (Section 12.2 of the Boiler Instructions). The system MUST be completely cold to ensure the boiler is operating under full demand. If this cannot be maintained for sufficient time to measure the gas rate, remove the diverter valve motor and the DHW Hall sensor and fully open a hot tap(s) to prevent the boiler switching off by reaching temperature. Ensure the correct orientation of the Hall sensor when reassembling.

11. On completion, the boiler link wire can be connected if required and any remaining system wiring completed. Ensure all controls are calling for heat.

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. 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.

Page 26

11.0 Electrical

Fig. 36

Fig. 34

Control Box

g/y

Frost Thermostat

External Clock

Pipe Thermostat

Room ‘Stat

Fused Spur

230V

NOTE: When using an existing external control system 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.

11.1 Making The Electrical Connections

1. IMPORTANT: First remove the i-THINK controller, then undo the securing screws and lift the case front panel off. Ensure that power to the boiler is isolated.

2. Disengage the securing tab at the left and hinge the control box downwards. Undo the terminal block cover securing screw and remove the cover (Fig. 34).

3. The boiler is supplied with a mains input lead connected. Remove the grommet adjacent to the gland nut, pierce the diaphragm and insert the cable from the external control system.

4. Leave sufficient slack in the cables to allow the Control Box to be hinged fully open. Tighten the gland nut and refit the grommet.

NOTE: Both the Permanent Live and Neutral connections are fused. The mains supply is 230V ~ 50H

fused at 3A (see Section 7.5 for further details).

5. Refer to the instructions supplied with the external control(s).

6. When fitting the boiler to an existing installation it may be desired to retain the external control system already in place. In such circumstances the wiring should be as shown in Fig. 36 for example, and the i-THINK controller set to ‘On’ heating operation with no timed ‘off’ periods (as supplied). NO LOW VOLTAGE EXTERNAL CONTROLS (except the Outdoor Sensor) CAN BE FITTED IN THIS INSTANCE !

IMPORTANT: Any thermostat shown in Fig. 36 MUST be suitable for 230V switching.

7. The 230V supply at terminal 2 must be connected to the control system. The switched output from the control system must be connected to terminal 1. If the room thermostat being used incorporates an anticipator it MUST be wired as shown in Fig. 36.

8. Once wiring is complete replace all covers.

NOTE: If the i-THINK Controller is to be used as a timer or room unit, or if any of the available Low Voltage external controls (with the exception of the Outdoor Sensor) are to be used IT IS NOT POSSIBLE TO CONNECT A FROST OR PIPE THERMOSTAT TO TERMINAL M1. In these instances the link wire must be connected to 1 & 2 of Terminal M1.

11.2 Preliminary Electrical Checks

1. Prior to commissioning the boiler preliminary electrical system checks should be carried out.

2. These should be performed using a suitable meter, and include checks for Earth Continuity, Resistance to Earth, Short Circuit and Polarity.

M1 Boiler Mains Voltage Terminal Block

Case Front Panel Securing Screw

i-THINK Controller

Unclip before

removing case

Case Front Panel Securing Screw

Page 27

11.0 Electrical

11.3 i-THINK Controller (Fig. 37)

Easy Menu Button

Standby Mode

Summer/Winter Mode

CH/DHW Temperatures

Selector Button

Scrolling Options and Values Selecting Options and Values

Menu Button

Programming

Options

i-THINK Controller

Fig. 37

Burner in Operation

Heating to the Comfort Set Point

Heating to the Reduced Set Point

Central Heating Times Active

DHW Times Active

Combustion Check Function Active

Holiday Function Active

Manual Override

Time Switch Function Active

i-THINK Controller & Main PCB Established

i-THINK Controller programmed as Room Sensor

Error Message

Stand By - Appliance On/Off (Off = Frost Protection)

Outdoor Sensor Connected

System / Appliance Attention Required

Maintenance / Special Mode

Change Battery (only if radio control fitted)

Text 3

Text 1 Text 2

Display showing all available segments

Display Descriptions

1. The i-THINK Controller is effectively an interface which allows the householder to programme the appliance to provide the desired comfort levels for the central heating and hot water. It also gives information on the appliance – error codes, primary system pressure etc.

2. Whilst the i-THINK Controller is on the appliance the standard screen displays the appliance flow temperature. External sensors/room thermostats can be connected to monitor and control the room and domestic hot water temperatures.

3. The i-THINK Controller may be removed from the appliance and used as a programmable room unit – 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.

Outside

Temperature

Boiler or Room

Temperature

Page 28

11.0 Electrical

11.4 Room Unit Installation Procedure

1. Room unit location: The wall cradle should be located in the main living room while giving consideration to the following points:

The place of installation should be chosen such that the sensor can capture the room temperature as accurately as possible without getting adversely affected by direct solar radiation or other heat or refrigeration sources (about 1.5 meters above the floor).

There must be sufficient clearance around the unit, enabling it to be fitted and removed.

IMPORTANT: A TRV should not be fitted to the radiator in the same room as the i-THINK Controller working as a Room Sensor. If a TRV has been installed on this radiator, the TRV must remain set open at all times, otherwise the house holder will experience room temperature control problems.

11.5 Low Voltage Terminal M2

NOTE: Only Baxi supplied Low Voltage control accessories

must be used with this boiler.

1. When directed in Baxi control accessory literature to connect wiring to ‘Boiler Wiring Terminals (see Boiler Manual for details)’ the wiring MUST be connected to Terminal M2.

2. Where used, the Outdoor Sensor must be connected to Terminals 4 & 5 of M2. Other Baxi Low Voltage control accessories must be connected to terminals 1, 2 & 3 of M2:Terminal 1 (Red) = Live (for display backlight) Terminal 2 (Black) = Ground Terminal 3 (White) = Data Signal

3. When Baxi control accessories are connected to Terminal M2 the yellow link wire supplied in the boiler fitting kit MUST be fitted to terminals 1 & 2 of M1 Mains Voltage Terminal Block, except when using the Outdoor Sensor. This may be used with a 230V control system.

Fig. 39

Min. 200 mm

1500 mm

Fig. 40

M2 Boiler Low Voltage Terminal Block

M1 Boiler Mains Voltage Terminal Block

Red

Black

White

Brown

Black

Brown

Blue

Green/Yellow

Brown

M2 Terminals 1, 2 & 3 Remote Room Units, etc.

M2 Terminals 4 & 5 Outdoor Sensor

Link

IMPORTANT: DO NOT CONNECT any Low Voltage controls to Mains Voltage Terminal M1 ! Irreparable damage may occur !

Link Wire to be fitted across 1 & 2 of M1 when Low Voltage controls connected to M2.

Page 29

11.0 Electrical

11.6 1.1 Positioning the Outdoor 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.

NOTE: DO NOT position the sensor in direct sunlight !

2. The Sensor should be positioned approximately half the height of the living space ‘H’ of the property, and a minimum of 2.5m above ground level.

3. It must be positioned away from any sources of heat or cooling (e.g. flue terminal) to ensure accurate operation. Siting the Sensor above doors and windows, adjacent to vents and close to eaves should be avoided.

11.7 Connecting the Outdoor Sensor

1. Ensure the electrical supply to the boiler is isolated and remove the i-THINK controller. Undo the securing screws and lift the case front panel off.

2. Disengage the securing tab and hinge the control box downwards. Undo the terminal block cover securing screw and remove the cover.

3. Remove one of the grommets, pierce the diaphragm and insert the wires from the Outdoor Sensor.

4. Leave sufficient slack in the wires to allow the Control Box to be hinged fully open. Refit the grommet.

5. Connect the wires from the Outdoor Sensor (two core “bell wire” is suitable) to positions 4 & 5 on M2 as shown. Refit the cover.

6. When correctly connected the outside temperature and icon will be display on the i-THINK Controller.

11.8 Setting the Sensor Curve

1. The default curve is 1.5. If it is desired to change the curve, proceed as follows. Ensure that there is power to the boiler.

2. Press and then press and for 6 seconds. ‘Chimney sweep function’ will be displayed.

3. Turn the Selector Button until ‘Commissioning’ is displayed. Press the Selector Button.

4. Turn the Selector Button until ‘Temps/mode CH1’ is displayed. Press the Selector Button.

5. Turn the Selector Button until ‘Heating curve slope’ is displayed and the number ‘720’ is shown at the right of the screen.

6. Press the Selector Button so that the number at the bottom right of the screen flashes. Turn the Selector Button until this number corresponds with the desired curve on the graph opposite.

7. Press to confirm and to exit.

North

West

2.5m Min

4 3.5 3 2.75 2.5

1.75

1.5

1.25

0.75

0.5

0.25

20 10 0

Outdoor Temperature

-10 -20

Flow

Temperature

Page 30

12.0 Commissioning

Fig. 41

Pump

Pressure Gauge

bar

Control Box removed for clarity

Fig. 42

Automatic Air

Vent

Cap

12.1 Commissioning the Boiler

It is recommended that the De-Aeration Process is carried out prior to firing the boiler for the first time, as part of commissioning. This will assist in removing residual air from the boiler.

1. Reference should be made to BS:EN 12828, 12831 & 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 and all hot water taps to purge the DHW system. Ensure that the filling loop is connected and open, then open the heating flow and return valves on the boiler.

4. Open the cap on the automatic air vent on the pump body (Fig. 41). The system must be flushed in accordance with BS 7593 (see Section 6.2) and the flushing agent manufacturers instructions.

5. Pressurise the system to 1.5 bar (Fig. 42) then close and disconnect the filling loop.

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 tightness.

Page 31

12.0 Commissioning

12.2 Check the Operational (Working) Gas Inlet

Pressure & Gas Rate

IMPORTANT: The system MUST be completely cold to

ensure the boiler is operating under full demand. If this cannot be maintained for sufficient time to measure the gas rate, remove the diverter valve motor and Hall effect sensor and fully open a hot tap(s) to prevent the boiler switching off by reaching maximum temperature.

1. To set the boiler to operate at maximum rate ensure all external controls e.g. room stat, timer etc. are calling for heat and turn on the mains electrical supply.

2. With the boiler operating in the maximum rate condition check that the operational (working) gas pressure at the inlet gas pressure test point is in accordance with B.S. 6798 & B.S. 6891.

3. Ensure that this inlet pressure can be obtained with all other gas appliances in the property working.

(continued on next page)

Fig. 43

Inlet Gas Pressure Test Point

DO NOT check gas pressure here

Control Box removed for clarity

Retaining Clip

Diverter Valve

Motor

Hall Effect Sensor

Fig. 43a

Page 32

12.0 Commissioning

12.2 Check the Operational (Working) Gas Inlet

Pressure & Gas Rate (cont)

4. Press and for 6 seconds. ‘Chimney sweep function’ will be displayed.

5. Press the Selector Button . Chimney sweep function on and the display screen will appear briefly until the screen below appears.

6. Press the Selector Button . Rotate the button either clockwise or anticlockwise until ‘Full Load’ or ‘Partial Load’ is displayed. Press the button to select.

Measure the Gas Rate

7. With any other appliances & pilot lights turned OFF the gas rate can be measured. It should be:-

28 kW model 2.96 m

33 kW model 3.49 m

40 kW model 4.23 m

8. To deactivate the function press and for 6 seconds. The screen below appears.

9. Press the Selector Button to turn off. Chimney sweep function off will appear briefly and then wait until the display screen is shown.

10. Carefully read and complete all sections of the Benchmark Commissioning Checklist at the rear of this publication that are relevant to the boiler and installation. These details will be required in the event of any warranty work. The publication must be handed to the user for safe keeping and each subsequent regular service visit recorded.

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.

Controller stop function

---------------------------------------------------

Chimney sweep function

Adjust? Full load

303: Chimney sweep function

Burner output

Controller stop function

---------------------------------------------------

Chimney sweep function

04. November 2008 08:50 Tuesday

1.6 bar

04. November 2008 08:50 Tuesday

1.5 bar

Menu Button

Easy Menu Button

Selector Button (OK Button)

i-THINK Controller

Display Screen

Fig. 43b

Page 33

13.0 Completion

Fig. 44

Facia Panel

13.1 Completion

1. Replace the case front panel, and secure with the screws previously removed. Re-fit the i-THINK Controller.

2. This publication must be handed to the user for safe keeping and each subsequent regular service visit recorded.

3. 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.

4. Instruct the user in the operation of the boiler controls. Hand over the i-THINK Set Up Guided/User’s Operating/Important Warranty booklet and the Installation & Servicing Instructions, giving advice on the necessity of regular servicing.

5. Demonstrate to the user the action required if a gas leak occurs or is suspected. Show them how to turn off the gas supply at the meter control, and advise them not to operate electric light or power switches, and to ventilate the property.

6. Show the user the location of the system control isolation switch, and demonstrate its operation.

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.

Case Front Panel

Page 34

14.0 Servicing

14.1 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:-

• The integrity of the complete flue system and the flue seals.

• The integrity of the boiler combustion circuit and relevant seals as described in Section 14.2.

• The operational gas inlet pressure as described in Section

12.2.1 to 12.2.7 and the gas rate as described in 11.2.8.

• The combustion performance as described in ‘Check the

Combustion Performance’ (14.1.4 to 14.1.6 below).

3. Competence to carry out Checking Combustion

Performance

B.S. 6798 ‘Specification for Installation & Maintenance of Gas Fired Boilers not exceeding 70kW’ advises that:-

• The person carrying out a combustion measurement should have been assessed as competent in the use of a flue gas analyser and the interpretation of the results.

• The flue gas analyser used should be one meeting the requirements of BS7927 or BS-EN50379-3 and be calibrated in accordance with the analyser manufacturers’ requirements.

• Competence can be demonstrated by satisfactory completion of the CPA1 ACS assessment, which covers the use of electronic portable combustion gas analysers in accordance with BS 7967, Parts 1 to 4.

Check the Combustion Performance (CO/CO

ratio)

4. Set the boiler to operate at maximum rate as described in Section 16.1.1 to 16.1.6.

5. Remove the plug from the flue sampling point, insert the analyser probe and obtain the CO/CO

ratio. This must be

less than 0.004.

6. If the combustion reading (CO/CO

ratio) is greater than this, and the integrity of the complete flue system and combustion circuit seals has been verified, and the inlet gas pressure and gas rate are satisfactory either:

• Perform the ‘Annual Servicing - Inspection’ (Section 14.2) &

re-check

• Adjust the gas valve (Section 16.0) & re-check

• Replace the gas valve (Section 15.23) & re-check

14.2 Annual Servicing - Inspection

1. Ensure that the boiler is cool.

2. Ensure that both the gas and electrical supplies to the

boiler are isolated.

3. Remove the screws securing the case front panel. Lift the panel slightly to disengage it from the studs on top of the case (Fig. 45) and hinge down the Control Box.

4. Disconnect the condensate drain pipe and unscrew the sump from the bottom of the condensate trap assembly (Fig. 46). Remove any deposits from the sump and trap. Clean as necessary and replace the sump.

Fig. 45

Case Front Panel

Case Front Panel Securing Screw

Fig. 46

Condensate Trap

Condensate Drain Pipe

Sump

Gasket

Flue Sampling

Point

Air Sampling

Point

IMPORTANT: Before commencing any work on the boiler or controls ensure that the installation is isolated.

In ‘Standby’ mode (if no error is displayed) approximately 160 - 170 volts is present at the flame sensing lead !

Case Front Panel Securing Screw

Page 35

14.0 Servicing

Fig. 48

DHW Isolation

Cock

Fig. 49

Fan, Collector and Cover

Assembly

Electrode

Leads

Electrode Position

Control Box removed for clarity

Fig. 47

Gas Feed Pipe

Securing Clip

0.5

Spark Ignition Electrode

Flame Sensing Electrode

View underneath appliance

Hall Effect

Sensor

Hydraulic Inlet

Assembly

Fig. 50

Restrictor

(not on 40 models)

Filter

14.2 Annual Servicing Inspection (Cont)

5. Remove the clip securing the gas feed pipe to the air/gas venturi. Disconnect the pipe. Do not break the joint between the pipe and gas valve unless necessary.

6. Disconnect the electrode leads, noting their position, and the fan electrical plugs and earth wiring (Fig. 48).

7. Undo the four nuts retaining the combustion box cover to the heat exchanger.

8. Carefully draw the fan, collector and cover assembly forward (Figs. 48).

9. Clean any debris from the heat exchanger and check that the gaps between the tubes are clear.

10. Inspect the burner, electrodes position and insulation, cleaning or replacing if necessary. Clean any dirt or dust from the air box.

11. Carefully examine all seals & gaskets, replacing as necessary. Look for any evidence of leaks or corrosion, and if found determine & rectify the cause.

12. Reassemble in reverse order, ensuring the front case panel is securely fitted.

DHW Filter & Turbine Assy. (Fig. 50)

13. If the flow of domestic hot water is diminished, it may be necessary to clean the filter.

14. Turn the DHW isolation cock (Fig. 49) off and draw off from a hot tap.

15. Remove the retaining clip and extract the filter cartridge and rinse thoroughly in clean water. Reassemble and check the flow. Ensure that the turbine spins freely.

16. Recommission the boiler as described in Section 11.0.

17. Complete the relevant Service Interval Record section of the Benchmark Commissioning Checklist at the rear of this publication and then hand it back to the user.

14.3 Reset ‘Service Due’

1. After 11 months of 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)

2. Once the service has been completed satisfactorily the ‘Service Due’ message can be reset.

3. Press then press & together for 6 seconds. Use the Selector Button to scroll to ‘Commissioning Menu’, press and scroll to ‘Service/Special Operation’.

4. Press the Selector Button to reset the service timer and press to exit.

Page 36

15.0 Changing Components

IMPORTANT: When changing components ensure that

both the gas and electrical supplies to the boiler are isolated before any work is started. In ‘Standby’ mode (if no error is displayed) approximately 160 - 170 volts is present at the flame sensing lead ! When the component has been changed recommission the boiler as described in Section 12.0. Always examine any seals or gaskets, replacing where necessary. The Case Front Panel MUST seal effectively against the air box side panels.

See Section 14.1 “Annual Servicing” for removal of case panel, door etc.

15.1 Igniter (Fig. 51)

1. Disconnect the igniter feed plug, ignition and earth leads, noting their positions.

2. Undo the screw securing the bracket to the boiler.

3. Remove the igniter and transfer the bracket to the new component.

4. Reassemble in reverse order.

15.2 Spark Ignition and Flame Sensing Electrodes

(Fig. 52)

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. Check the condition of the sealing gaskets and replace if necessary. Reassemble in reverse order.

4. After changing the Flame Sensing Electrode check the combustion - see Section 15.1.

5. If satisfactory combustion readings are not obtained ensure the electrode position is correct and perform the combustion check again.

Fig. 52

Spark

Ignition

Electrode

Flame

Sensing

Electrode

Leads

Control Box removed for clarity

Fig. 51

Igniter

Igniter Feed

Plug

Ignition

Lead

Bracket

Earth Lead

Page 37

15.0 Changing Components

15.3 Fan (Fig. 53)

1. Remove the clip securing the gas feed pipe to the air/gas venturi. Disconnect the pipe.

2. Undo the screws securing the collector to the cover (33/40 kW models) or extension piece (28 kW model), disconnect the fan electrical plugs and earth wiring.

3. Remove the collector and fan assembly, being careful to retain the gasket.

4. Undo the screws securing the fan to the collector. Retain the gasket.

5. Undo the screws securing the venturi to the fan (noting its position) and transfer to the new fan, replacing the seal if necessary.

6. Examine the gasket(s) and replace if necessary.

7. Reassemble in reverse order.

15.4 Air/Gas Venturi (Figs. 53 & 54)

1. Remove the clip securing the gas feed pipe to the venturi.

2. Undo the screws securing the collector to the cover (33/40 kW models) or extension piece (28 kW model) and disconnect the fan electrical plugs.

3. Remove the collector and fan assembly, being careful to retain the gasket.

4. Undo the screws securing the venturi to the fan (noting its position) and fit the new venturi, replacing the seal if necessary.

5. Examine the gasket and replace if necessary.

6. Reassemble in reverse order.

Cover

Fan

Air/Gas

Collector

Fig. 53

Control Box removed for clarity

Gasket

Air/Gas

Venturi

Gas Feed Pipe

Venturi

Gasket

Fan

Fig. 54

Air Box is on 28 kW model only. All illustrations show 33/40 models. It will be necessary to remove this before replacing the Fan, Venturi & Burner.

Page 38

15.0 Changing Components

15.5 Burner (Fig. 55)

1. Remove the clip securing the gas feed pipe to the air/gas venturi and disconnect the fan electrical plugs.

2. Undo the screws securing the collector to the cover (33/40 kW models) or extension piece (28 kW model). Remove this extension piece from the cover (on 28 kW models).

3. Withdraw the burner from the cover and replace with the new one.

4. Examine the gasket(s), replacing if necessary.

5. Reassemble in reverse order.

15.6 Insulation (Fig. 56)

1. Remove the clip securing the gas feed pipe to the venturi and disconnect the fan electrical plugs.

2. Remove the electrodes as described in section 15.2.

3. Undo the nuts holding the cover to the heat exchanger. Draw the air/gas collector, fan and cover assembly away.

4. Remove the cover insulation piece.

5. Fit the new insulation carefully over the burner and align it with the slots for the electrodes.

6. If the rear insulation requires replacement, remove it and all debris from the heat exchanger. Also it may be necessary to separately remove the spring clip from the pin in the centre of the heat exchanger and the ‘L’ shaped clips embedded in the insulation.

7. Do not remove the shrink-wrapped coating from the replacement rear insulation. Keep the insulation vertical and press firmly into position.

8. Examine the cover seal and replace if necessary. Reassemble in reverse order.

Fig. 55

Cover

Burner

Gasket

Extension Piece

(28 kW model only)

Air/Gas

Collector

Heat

Exchanger

Rear

Insulation

Cover

Insulation

Seal

Air/Gas

Collector

Spark Ignition

Electrode

Flame Sensing

Electrode

Leads

Fig. 56

Control Box removed for clarity

Gasket

Page 39

15.0 Changing Components

15.7 Flue Sensor (Fig. 57)

1. Ease the retaining tab on the sensor away and disconnect the electrical plug.

2. Turn the sensor 90° anticlockwise to remove - it is a bayonet connection.

3. Reassemble in reverse order.

15.8 Heating Flow & Return Sensors (Fig. 58)

1. There is one sensor on the flow (red wires) and one sensor on the return (blue wires).

2. After noting the position prise the sensor clip off the pipe and disconnect the plug.

3. Connect the plug to the new sensor and ease the clip onto the pipe as close to the heat exchanger as possible.

15.9 Safety Thermostat (Fig. 58)

1. Pull the terminals off the safety thermostat.

2. Remove the screws securing the thermostat to the mounting plate on the flow pipe.

3. Reassemble in reverse order, ensuring that the terminals are pushed fully on.

15.10 DHW NTC Sensor (Fig. 59)

1. Turn off the mains cold water supply tap and draw off the residual domestic hot water.

2. Ease the retaining tab on the sensor away and disconnect the electrical plug.

3. Unscrew the sensor from the hydraulic outlet assembly. Examine the sealing washer, replacing if necessary.

4. Reassemble in reverse order. The plug will only fit one way.

15.11 Hydraulic Pressure Sensor (Fig. 59)

1. Close the flow and return isolation taps and drain the primary circuit.

2. Disconnect the plug from the sensor.

3. Prise off the spring clip and remove the sensor. Examine the ‘O’ ring, replacing if necessary.

4. Reassemble in reverse order.

Flue Sensor

Electrical

Plug

Fig. 57

Central Heating

Temperature Sensor

Fig. 58

DHW NTC Sensor

Fig. 59

Control Box removed for clarity

Safety Thermostat

Pump, Gas Valve

Assemblies and Pipework

removed for clarity

Hydraulic Pressure

Sensor

Plug

Retaining Clip

Page 40

15.0 Changing Components

Socket Headed

Screw

Pump Head

Pump Body

Automatic Air

Vent

Fig. 60

Fig. 61

Electrical Supply

Plug

Pump Flow

Pipe

15.12 Pump - Head Only (Fig. 60)

1. Disconnect the electrical supply plug at the pump and the modulation feed wire part way along its length.

2. Close the flow and return isolation taps and drain the primary circuit. Remove the socket head screws securing the pump head to the body and draw the head away.

3. Reassemble in reverse order.

15.13 Pump - Complete (Fig. 61)

1. Disconnect the electrical supply plug from the pump.

2. Close the flow and return isolation taps and drain the primary circuit. Undo the two screws securing the body to the inlet assembly and pump flow pipe. Draw the complete pump forwards.

3. Pull off the securing clip and remove the automatic air vent. Transfer them to the new pump body.

4. Examine the ‘O’ ring seals, replacing if necessary and reassemble in reverse order.

15.14 Automatic Air Vent (Fig. 61)

1. Close the flow and return isolation taps and drain the primary circuit. Disconnect the gas pipe from the venturi.

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.

Control Box removed for clarity

Page 41

15.0 Changing Components

15.15 Hall Effect Sensor (Fig. 62)

1. Ease the sensor upwards off the hydraulic inlet manifold assembly.

2. Disconnect the electrical plug from the sensor.

3. Connect the plug to the new sensor. Carefully fit the new sensor to the hydraulic assembly, ensuring it is fully down.

15.16 Safety Pressure Relief Valve (Fig. 63)

1. Close the flow and return isolation taps and drain the primary circuit.

2. Disconnect the discharge pipework from the valve. Remove the sealing grommet.

3. Slacken the grub screw securing the pressure relief valve and remove from the inlet assembly.

4. On reassembly ensure that the ‘O’ ring is in place and the sealing grommet is correctly refitted to maintain the integrity of the case seal.

15.17 Pressure Gauge (Figs. 64 & 65)

1. Close the flow and return isolation taps and drain the primary circuit.

2. Remove the gauge from the boiler lower panel.

3. Remove the clip securing the pressure gauge capillary.

4. Fit the new gauge, ensuring that the capillary is routed to prevent any sharp bends. Reassemble in reverse order and ensure the gauge is firmly in position to maintain the integrity of the case seal.

Pressure

Gauge

Control Box removed for clarity

Fig. 64

Safety Pressure Relief Valve

Grub Screw

‘O’ ring seal

Discharge Pipe

Fig. 63

Hall Effect

Sensor

Hydraulic Inlet

Assembly

Fig. 62

Pressure Gauge Capillary

Fig. 65

Page 42

15.0 Changing Components

Plate Heat Exchanger

Rubber Seal

15.18 Plate Heat Exchanger (Fig. 66)

1. Close the flow & return isolation taps and the cold mains inlet. Drain the primary circuit and draw off any residual DHW.

2. Remove the gas valve as described in Section 15.22 and disconnect the pressure gauge capillary.

3. Undo the screws securing the plate heat exchanger to the hydraulic inlet & outlet assemblies.

4. Withdraw the plate heat exchanger upwards and remove.

Seals

5. There are four rubber seals between the hydraulic assembly and heat exchanger which may need replacement.

6. Ease the seals out of the hydraulic assembly. Replace carefully, ensuring that the seal is inserted parallel and pushed fully in.

7. When fitting the new heat exchanger note that the right hand location stud is offset more towards the centre.

8. Reassemble in reverse order.

15.19 Diverter Valve - Motor & Valve Assembly

(Fig. 67)

1. To replace the motor, disconnect the multi-pin plug.

2. Pull off the retaining clip and remove the motor.

3. The motor can now be replaced, or the valve assembly removed.

4. Drain the primary circuit and draw off any hot water once the isolating taps are closed. Disconnect the pressure gauge capillary and h/exchanger flow pipe.

5. Undo the nuts on the tap rail under the boiler. Remove the screws securing the valve assembly to the boiler bottom panel and plate heat exchanger.

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.

Control Box removed for clarity

Fig. 66

Multi-pin Plug

Retaining Clip

Valve

Assembly

Fig. 67

Diverter Valve

Motor

Page 43

15.0 Changing Components

15.20 P.C.B. (Fig. 68)

1. Ensure the power to the boiler is isolated.

2. Remove the screws securing the control box cover and release the cover retaining barbs from their slots.

3. Note the position of all plugs and wires on the P.C.B. and disconnect them.

4. Undo the securing screws and remove the P.C.B.

5. Reassemble in reverse order and check the operation of the boiler.

15.21 P.C.B. Bridge (Fig. 68)

1. Ensure the power to the boiler is isolated and remove the i-THINK Controller.

2. Remove the screws securing the control box cover and release the cover retaining barbs from their slots.

3. Note the position of all plugs and wires on the main P.C.B. and disconnect them.

4. Undo the securing screws and remove the main P.C.B. and then undo the screws and remove the P.C.B. Bridge. Transfer the bridge harness to the new P.C.B. Bridge.

5. Reassemble in reverse order and check the operation of the boiler.

Fig. 68

P.C.B.

Bridge

Control Box Cover

i-THINK

Controller

Page 44

15.0 Changing Components

15.22 Gas Valve (Fig. 69)

IMPORTANT: After replacing the valve the CO2must be checked as detailed in Section 16.0 Combustion. Only change the valve if a suitable calibrated combustion analyser is available, operated by a competent person see section 14.1.

1. Turn the gas cock off and undo the nut under the boiler. Retain the washer.

2. Remove the electrical plugs from the valve.

3. Undo the nut on the venturi inlet pipe and ease the pipe aside, retaining the washer.

4. Remove the nut securing the gas valve to the boiler bottom panel.

5. Reassemble in reverse order, ensuring the washers are in place, and check the combustion (Sections 16.0).

NOTE: Check for gas tightness after replacing gas valve.

15.23 Expansion Vessel (Fig. 70)

1. Close the flow and return isolation taps and drain the primary circuit.

2. Undo the nut on the pipe connection at the bottom of the vessel, and slacken the nut on the hydraulic inlet assembly.

3. Remove the screws securing the support bracket, and withdraw the bracket.

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.

Gas Valve

Fig. 69

Expansion Vessel

Lock Nut

Fig. 70

Support Bracket

Venturi Inlet

Pipe

Control Box removed for clarity

Plug

Gas Cock

Washer

Plug

Nut

Page 45

16.0 Combustion

16.1 Checking the Combustion

IMPORTANT: The system MUST be completely cold to

1. The measured CO

is dependent upon the length of time the boiler has operated (actual firing time, NOT CH demand time) and also if a new sensing electrode or burner has been recently fitted.

2. A new boiler (up to 100 hours operating time) or boiler with new sensing electrode or burner will give:-

Full Load 8.0 - 9.5% CO

Partial Load 7.0 - 8.5% CO

3. A boiler with over 100 hours operating time will give:-

Full & Partial Load 8.3 - 9.7% CO

4. Press and for 6 seconds. ‘Chimney sweep function’ will be displayed.

5. Press the Selector Button . Chimney sweep function on and the display screen will appear briefly until the screen below appears.

6. Press the Selector Button . Rotate the button either clockwise or anticlockwise until ‘Full Load’ or ‘Partial Load’ is displayed. Press the button to select.

7. Measure and note the CO

8. To deactivate the function press and for 6 seconds. The screen below appears.

9. Press the Selector Button to turn off. Chimney sweep function off will appear briefly and then wait until the display screen is shown.

Fig. 71

Flue Adaptor Test

Point

Plug

Analyser Probe

New boiler - Full Load 8.0 - 9.5% CO

New boiler - Partial Load 7.0 - 8.5% CO

Boiler 100+ hours - Full & Partial Load 8.3 - 9.7% CO

Boiler 100+ hours - Full & Partial Load 3.6 - 6.1% O

Retaining Clip

Diverter Valve

Motor

Hall Effect Sensor

Controller stop function

---------------------------------------------------

Chimney sweep function

Adjust? Full load

303: Chimney sweep function

Burner output

Controller stop function

---------------------------------------------------

Chimney sweep function

04. November 2008 08:50 Tuesday

1.6 bar

IMPORTANT: DO NOT insert the Analyser Probe into the Test Point immediately. This will prevent saturation of the analyser. Allow the boiler to stabilise before taking any reading.

The person carrying out a combustion measurement should have been assessed as competent in the use of a flue gas analyser and the interpretation of the results.

The flue gas analyser used should be one meeting the requirements of BS7927 or BS-EN50379-3 and be calibrated in accordance with the analyser manufacturers’ requirements.

Page 46

17.0 Schematic Wiring

17.1 Illustrated Wiring Diagram

Link

g/y

Mains Input Cable

X20 X21 X30

X42X41X40

X60

X23

X25

X22

X50

X10 X11 X12 X13 X14X15

X1 X2

i-THINK Controller

Flue Sensor

Heating

Return Sensor

Heating

Flow

Sensor

Igniter

Spark

Ignition

Electrode

Flame Sensing Electrode

Gas

Valve

Fan

Safety

Thermostat

g/y

Diverter

Valve

Motor

Hydraulic Pressure Switch

Hall Effect

Sensor

DHW

NTC

Sensor

Pump

g/y

Low Voltage

External Control

Connection

Mains Voltage

Connection

Key To Wiring Colours

b - Blue

bk - Black

br - Brown

w - White

gr - Grey

r- Red

g - Green

g/y - Green/Yellow

y - Yellow

p - Purple

Page 47

18.0 Short Parts List

Short Parts List

Key Description Manufacturers No.

No. Part No.

A Fan (28/33) 720908801

Fan (40) 720909001

B Burner (28/33) 720767901

Burner (40) 720785201

C Spark Ignition Electrode 720908401

D Flame Sensing Electrode 720908601

E Gas Valve 720910001

F Hall Effect Sensor 720788201

G Plate Heat Exchanger (28) 720790001

Plate Heat Exchanger (33/40) 720790201

H Diverter Valve Motor 720788601

J Pump 720910801

K Heating Flow/Return Sensor 720747101

L DHW NTC Sensor 720789201

M Pump Automatic Air Vent 720777601

N Hydraulic Pressure Sensor 720789001

O Pressure Gauge 720910601

P Flue Sensor 720851401

Q PCB 28 720912001

PCB 33 720912201

PCB 40 720912401

R Venturi 28 720909201

Venturi 33 720909401

Venturi 40 720909601

S Igniter 720913201

Page 48

19.0 Fault Finding

19.1 Initial Fault Finding Checks

1. Check that gas, water and electrical supplies are available at the boiler.

2. Electrical supply = 230V ~ 50 Hz.

3. The preferred minimum gas pressure is 20 mbar.

4. Carry out electrical system checks, i.e. Earth Continuity, Resistance to Earth, Short Circuit and Polarity with a suitable meter.

NOTE: These checks must be repeated after any servicing or fault finding.

7. Ensure all external controls are calling for heat and check all external and internal fuses. Before any servicing or replacement of parts, ensure the gas and electrical supplies are isolated.

19.2 Error Codes

1. If a fault occurs on the boiler an error code may be shown by the facia display.

2. The codes are a flashing number, either two or three digit, preceded by the symbol :-

followed by

20, 28, 40, or 160 indicates possible faulty

components.

110 indicates overheat of the primary system water.

117 is displayed when the primary water pressure is greater

than 2.7 bar.

118 is displayed when the primary water pressure is less than

0.5 bar.

133 indicates that the gas supply has been interrupted,

ignition has failed or the flame has not been detected.

128 is displayed if there has been a flame failure during

normal operation.

125 is displayed in either of two situations:i) If between 15 and 30 seconds of the burner lighting the boiler temperature has not changed by 1°C. ii) If within 10 minutes of the burner lighting the boiler actual temperature twice exceeds the selected temperature by 30°. In these instances poor primary circulation is indicated.

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.

Central Heating NTC Fault

Flue NTC Fault

Central Heating Return NTC Fault

Pre-circulation Fault (Air in Boiler - Temporary Fault)

Safety Thermostat Operated

Primary System Water Pressure Too High

Primary System Water Pressure Too Low

Circulation Fault (Primary)

Flame Failure - In Operation

Flue NTC Operated

Flame Failure - At Ignition (after 4 attempts)

PCB Internal Fault

Flow/Return Sensor Temperature Test

Fan or Fan Wiring Fault (Fan Not Running)

Circulation Fault (Dry Fire)

Hot Water NTC Fault

False Flame (Flame Without Demand)

Input Voltage Too Low

Fan Speed Not Achieved

109

110

117

118

125

128

130

133

151

154

160

270

321

384

385

386

Table Of Error Codes

Reset Function

When an error is displayed press the Selector Button then rotate it until ‘Yes’ is displayed and press again.

Page 49

19.0 Fault Finding

Refer to “Illustrated Wiring Diagram” for position of terminals and components Central Heating - Follow operational sequence

Turn on mains power

The display illuminates

20, 28, 40 or 321 flashing

117 or 118 flashing

110, 125, 133, 135 or 384

flashing

Set Central Heating

temperature to Maximum.

symbol flashing, pump runs

Go to section ‘A’

Go to section ‘D’

Ensure all controls and

programmers are calling for

heat

Go to section ‘B’

If 110 is still flashing go to

section ‘H’

YES

Go to section ‘I’

Ensure controls are set to

demand and verify the

contacts are closed

Operate ‘Reset’ function

Fan runs after up to 4 minutes

160 flashing

Go to section ‘C’

If 110 or 384 is flashing or re-occurs regularly,

check all PCB connections. If this has no effect

replace the PCB.

Fan runs at correct speed

160 flashing

Go to section ‘C’

Spark at ignition electrodes up to 5 seconds & for 4 attempts

Go to section ‘F’. Operate the

‘Reset’ function

YES

Burner lights

Go to section ‘E’

Burner goes out after 5

seconds

133 flashing

Go to section ‘G’

YES

109 flashing

125 flashing after 1 min

Go to section ‘J’

YES

110 flashing

Go to section ‘H’

YES

3 Way Valve open to Central

Heating circuit

Go to section ‘K’

YES

Burner modulates to maintain

set temperature

Check CH NTC sensor.

Go to section ‘D’

130 flashing

Go to section ‘M’

YES

Burner goes out

Fan stops after 10 seconds

YES

Boiler operation correct

YES

133 flashing

Reset Function

When an error is displayed press the Selector Button

then rotate it until ‘Yes’ is displayed and press again.

Page 50

19.0 Fault Finding

Domestic Hot Water - Follow operational sequence

Turn on mains power

The display illuminates

20, 28, 40 or 321 flashing

117 or 118 flashing

Set Hot Water temperature to

Maximum & fully open hot tap.

symbol flashing, pump runs

Go to section ‘A’

Go to section ‘D’

DHW flow rate greater than

2litres/min

Burner lights

133 flashing

If 110 is still flashing go to

section ‘H’

YES

Go to section ‘I’

YES

Fan runs after up to 4 minutes

160 flashing

Go to section ‘C’

Fan runs at correct speed

160 flashing

Go to section ‘C’

Spark at ignition electrodes up to 5 seconds & for 4 attempts

YES

Burner lights

Go to section ‘E’

Burner goes out after 5

seconds

133 flashing

Go to section ‘G’

YES

109 flashing

125 flashing after 1 min

Go to section ‘J’

YES

110 flashing

Go to section ‘H’

YES

3 Way Valve open to

Domestic Hot Water circuit

Go to section ‘K’

YES

Burner modulates to maintain

set temperature

Check CH NTC sensor.

Go to section ‘D’

130 flashing

Go to section ‘M’

YES

Burner goes out

Fan stops after 10 seconds

YES

Boiler operation correct

YES

Go to section ‘L’

Go to section ‘B’

YES

If 110 or 384 is flashing or re-occurs regularly,

check all PCB connections. If this has no effect

replace the PCB.

Reset Function

When an error is displayed press the Selector Button then rotate it until ‘Yes’ is displayed and press again.

110, 125, 133, 135 or 384

flashing

Operate ‘Reset’ function

Go to section ‘F’. Operate the

‘Reset’ function

Page 51

19.0 Fault Finding

Fault Finding Solutions Sections

Is there 230V at:

Main terminals L and N Check electrical supply

Main terminal fuse Replace fuse

Display

illuminated

PCB - X10 connector Main terminals L and N

Check wiring

Fan connections correct at fan & PCB

X11 and X23 connectors - see

Wiring Diagram.

Make connections

Fan jammed or

faulty wiring

Connection

OK at X40

Display or

Main PCB fault

Switch to DHW mode maximum flow and operate the ‘Reset’ function. During next 3 minutes check:-

230V at PCB - X13 connector (between blue & brown - see Wiring Diagram)

Replace PCB

YES

230V between PCB - X13 connector and diverter valve motor - see Wiring Diagram

Replace PCB

YES

230V at pump

YES

Replace pump

Check wiring

230V at PCB - X11 connector (between blue & brown - see Wiring Diagram)

YES

Replace PCB

Replace fan or wire

YES

Temperature sensor faulty.

Check correct location and wiring.

Replace sensor

Cold resistance approximately 10kΩ @ 25° C (DHW and CH sensors) (resistance reduces with increase in temp.)

YES

Gas at burner

Ensure gas is on and purged

Replace PCB

Replace gas valve

Check wiring and PCB - X36 connector

see Wiring Diagram

YES

Page 52

19.0 Fault Finding

Replace PCB

Check and correct if necessary

1. Ignition electrode and lead

2. Electrode connection

3. Spark gap and position

Voltage at PCB - X15

connector is 24V

Check wiring - see Diagram

YES

0.5

Spark Ignition Electrode

Flame Sensing Electrode

Electrode Position

Viewing Window

Burner

Check and correct if necessary

1. The set of the gas valve (CO2 values - see instruction)

2. Flame sensing electrode and lead connections

3. Flame sensing electrode position

Check supply pressure at the

gas valve:-

Minimum 17 mbar

Replace sensing electrode or PCB

Replace PCB

YES

Replace safety thermostat

YES

Overheat thermostat operated or

faulty

Check for and correct any

system faults

Allow to cool. Continuity

across thermostat terminals

more than 1.5 ohm

Check Flow & Return Sensors -

see section ‘D’

Is 110 still flashing ?

YES

Replace Igniter

YES

Page 53

19.0 Fault Finding

Temperature sensors faulty. Cold resistance approximately 10kΩ @ 25° C (CH sensor) 20kΩ @ 25° C (Flue sensor) (resistance reduces with increase in temp.)

Replace sensor

YES

If pump is running the heat exchanger could be obstructed

Replace heat exchanger

Replace pressure sensor

YES

Restore system pressure

YES

CH system pressure less than

0.5 bar or greater than 2.7 bar

Check wiring and PCB - X22

connector for approx. 5V DC

between green & black - see

Wiring Diagram

Replace PCB

Replace sensor

System fault - correct

YES

Ensure that the boiler and system

are fully vented

Check flow temperature sensor connections

and position. Cold resistance approximately 10kΩ @ 25° C (CH sensors)

(resistance reduces with increase in temp.)

YES

Go to section ‘B’

Is there 230V at:

3-way valve motor Replace 3-way valve motor

YES

PCB - X13 connector terminals between:Blue & Black (central heating mode) Blue & Brown (domestic hot water mode)

see Wiring Diagram

Replace PCB

Check 3-way valve cable

YES

Replace PCB

Replace Hall Effect Sensor

Is mains water filter & assembly

clean, and rotor moving freely ?

Clean or replace

Check wiring and PCB - X22 connector for approx. 5V DC between red & blue from Hall

effect sensor - see Wiring Diagram

YES

Page 54

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

Customer Name

Address

Boiler Make and Model

Boiler Serial Number

Commissioned by (print name)

Company Name

Company Address

To be completed by the customer on receipt of a Buildings Regulations Compliance Certificate*:

Building Regulations Notification Number (if applicable)

Time and Temperature Control to Heating Room Thermostat and

Programmer/Timer

Programmable

Room Thermostat

Load/Weather Compensation

Time and Temperature Control to Hot Water Cylinder Thermostat and Programmer/Timer

Fitted

Yes

ppm Ratio

Yes

www.centralheating.co.uk

Yes

Temperature

Quantity

m /hr

mbar Gas Inlet Pressure

Gas Inlet Pressure (at maximum rate)

OR%ORCO

litres

Provided

Not Required

Combination Boiler

Optimum Start

Control

Heating Zone Valves

Hot Water Zone Valves

Thermostatic Radiator Valves

Automatic Bypass to System

Boiler Interlock

Telephone Number

Gas Safe Register Number

Telephone Number

Commissioning Date

The system has been flushed and cleaned in accordance with BS7593 and boiler manufacturer’s instructions

What inhibitor was used?

What system cleaner was used?

Gas Rate

Burner Operating Pressure (if applicable)

Central Heating Flow Temperature

Central Heating Return Temperature

Gas Rate

Burner Operating Pressure (at maximum rate)

Cold Water Inlet Temperature

Hot Water has been checked at all outlets

If required by the manufacturer, record the following

The heating and hot water system complies with the appropriate Building Regulations

The boiler and associated products have been installed and commissioned in accordance with manufacturer’s instructions

The operation of the boiler and system controls have been demonstrated to and understood by the customer

(To confirm satisfactory demonstration and receipt of manufacturer’s literature)

The manufacturer’s literature, including Benchmark Checklist and Service Record, has been explained and left with the customer

*All installations in England and Wales must be notified to Local Authority Building Control (LABC) either directly or through a Competent Persons Scheme.

A Building Regulations Compliance Certificate will then be issued to the customer.

Heating and Hotwater Industry Council (HHIC)

Commissioning Engineer’s Signature

Customer’s Signature

Water Flow Rate

Is the installation in a hard water area? (above 200ppm)

If yes and if required by the manufacturer, has a water scale reducer been fitted?

The condensate drain has been installed in accordance with the manufacturer’s instructions and/or BS5545/BS6798

If the condensate pipe terminates externally, has the pipe diameter been increased and weatherproof insulation fitted?

What type of scale reducer has been fitted?

CONTROLS Tick the appropriate boxes

ALL SYSTEMS

CENTRAL HEATING MODE

Measure and Record:

COMBINATION BOILERS ONLY

CONDENSING BOILERS ONLY

ALL INSTALLATIONS

DOMESTIC HOT WATER MODE Measure and Record

mbar

ft /hr

°C

m /hr

mbar

ft /hr

l/min

°C

CO/CO

Page 55

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.

Always use the manufacturer’s speciﬁed spare part when replacing controls.

Date:

Engineer Name:

Company Name:

Telephone No.

Gas Safe Register No.

Comments:

Signature:

Date:

Engineer Name:

Company Name:

Telephone No.

Gas Safe Register No.

Comments:

Signature:

Date:

Engineer Name:

Company Name:

Telephone No.

Gas Safe Register No.

Comments:

Signature:

Date:

Engineer Name:

Company Name:

Telephone No.

Gas Safe Register No.

Comments:

Signature:

Date:

Engineer Name:

Company Name:

Telephone No.

Gas Safe Register No.

Comments:

Signature:

Date:

Engineer Name:

Company Name:

Telephone No.

Operative ID No.

Comments:

Signature:

Date:

Engineer Name:

Company Name:

Telephone No.

Gas Safe Register No.

Comments:

Signature:

Date:

Engineer Name:

Company Name:

Telephone No.

Gas Safe Register No.

Comments:

Signature:

Date:

Engineer Name:

Company Name:

Telephone No.

Gas Safe Register No.

Comments:

Signature:

Date:

Engineer Name:

Company Name:

Telephone No.

Gas Safe Register No.

Comments:

Signature:

Service 1 Service 2

Service 3 Service 4

Service 5 Service 6

Service 7 Service 8

Service 9 Service 10

Page 56

UK Comp No720633602 (9/11)

BAXI

A Trading Division of Baxi Heating UK Ltd (3879156)

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

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 Platinum 2 Combi 28 GA, Platinum 2 Combi 33 GA, Platinum 2 Combi 40 GA Installation & Servicing Instructions Manual

Specifications and Main Features

Frequently Asked Questions

User Manual