Baxi EcoBlue Heat Quick Start Manual

United Kingdom

EcoBlue Heat

en

Installation and Service Manual

Gas Fired Wall Mounted Powered Flue Condensing Boiler

E

12 - 15 - 18 - 21 - 24

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.

1 Introduction

Model Range

Baxi EcoBlue 12 Heat

G.C.No 41 470 02

Baxi EcoBlue 15 Heat

o

G.C.N

41 470 03

Baxi EcoBlue 18 Heat

o

41 470 04

G.C.N

Baxi EcoBlue 21 Heat

o

G.C.N

41 470 05

Baxi EcoBlue 24 Heat

G.C.No 41 470 06

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.

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.

The Benchmark Scheme

0086

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.

ISO 9001

FM 00866

© Baxi Heating UK Ltd 2014 All rights reserved. No part of this publication may be reproduced or transmitted in any form or by any means, or
stored in any retrieval system of any nature (including in any database), in each case whether electronic, mechanical, recording or otherwise,
without the prior written permission of the copyright owner, except for permitted fair dealing under Copyrights, Designs and Patents Act 1988.

Applications for the copyright owner’s permission to reproduce or make other use of any part of this publication should be made, giving details of
the proposed use, to the following address:

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.

The Company Secretary, Baxi Heating UK Limited, 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.

You have just purchased one of our appliances and we thank you for the trust you have placed in our products. Please note that
the product will provide good service for a longer period of time if it is regularly checked and maintained. Our customer support
network is at your disposal at all times.

2 EcoBlue Heat 7212435 - 02 (08/14)

Installer Notification Guidelines

Choose Building

Regulations Notification

Route

Installer Notification Guidelines

1

Competent Person's

Self Certification Scheme

Install and Commission this
appliance to manufacturer's

instructions

Complete the

Benchmark Checklist

If you notify via the ‘Gas Safe

Register’, the register will issue

the Building Regulations

certificate on members’ behalf

Building Control

Contact your relevant Local

Authority Building Control

(LABC) who will arrange

an inspection or contact
a government approved

inspector

Install and Commission this
appliance to manufacturer's

instructions

Scheme Members only

Call ‘Gas Safe Register’ on:

0800 408 5577

or log onto:

www.gassaferegister.co.uk

within 10 days

You must ensure that the

certificate number issued by

the ‘Gas Safe Register’ is written

onto the Benchmark Checklist

‘Gas Safe Register’ will issue a

Building Regulations Compliance

Certificate to the property owner

and inform the relevant LABC

Complete the

Benchmark Checklist

LABC will record the data

and will issue a

certificate of compliance

7212435 - 02 (08/14) EcoBlue Heat 3

Contents

Contents

1 Introduction

1.1 General

1.2 Additional Documentation

1.3 Symbols Used

1.4 Abbreviations

1.5 Extent of Liabilities

1.5.1 Manufacturer’s Liability

1.5.2 Installer’s Liability

1.6 Homologations

1.6.1 Certifications

1.6.2 Directives

1.6.3 Standards

2 Safety

2.1 General Safety Instructions

2.2 Recommendations

2.3 Specific Safety Instructions

2.3.1 Handling

3 Technical Specifications

3.1 Technical Data

3.2 Dimensions and Connections

3.3 Electrical Diagram

4 Description of the Product

4.1 General Description

4.2 Operating Principle

4.3 Main Components

4.4 Control Panel Description

4.4.1 User Interaction Controller

4.5 Standard Delivery

4.6 Accessories & Options

4.6.1 Optional Extras

7

7
8
8
8
9

9
10
10
10
10

11

12

12
12
13
13

14

14
15
16

17

17
18
19
20
20
21
21
21

5 Before Installation

5.1 Installation Regulations

5.2 Installation Requirements

5.2.1 Gas Supply

5.2.2 Electrical Supply

5.2.3 Hard Water Areas

5.2.4 Bypass

5.2.5 System Control

5.2.6 Treatment of Water Circulating Systems

5.2.7 System Details - General

5.2.8 Low Head Installation / Open

5.2.9 Sealed Systems Details

5.3 Choice of the Location

5.3.1 Location of the Appliance

5.3.2 Data Plate

5.3.3 Bath & Shower Rooms

5.3.4 Ventilation

5.3.5 Condensate Drain

5.3.6 Clearances - Access in Service

5.3.7 Flue / Chimney Location

5.3.8 Horizontal Flue / Chimney Systems

22

22
22
22
23
23
23
23
23
24
24
25
26
26
26
26
26
27
29
30
32

4 EcoBlue Heat 7212435 - 02 (08/14)

Contents

5.3.9 Flue/Chimney Trim

5.3.10 Terminal Guard

5.3.11 Flue/Chimney Deflector

5.3.12 Flue/Chimney Accessories

5.4 Unpacking & Initial Preparation

5.4.1 Unpacking

5.4.2 Initial Preparation

5.4.3 Making the Water Connection

5.4.4 Filling the Condensate Trap

5.4.5 Connecting the Condensate Drain

5.4.6 Connecting the Gas Supply

6 Installation

6.1 Air Supply / Flue Gas Connections

6.1.1 Connecting the Top Flue

6.2 Electrical Connections

6.2.1 Electrical Connections of the Appliance

6.2.2 Connecting External Devices

6.3 Filling the System

6.4 Completing the Installation

6.4.1 Completion

7 Commissioning

7.1 General

7.2 Checklist before Commissioning

7.2.1 Preliminary Electrical Checks

7.2.2 Checks

7.3 Commissioning Procedure

7.4 Gas Settings

7.4.1 ‘Chimney Sweep’ Mode

7.4.2 ‘Chimney Sweep’ Mode - Combustion Check

7.5 Configuring the System

7.5.1 Check the Operational (Working) Gas Inlet Pressure & Gas Rate

7.6 Final Instructions

33
33
33
33
34
34
34
35
35
35
35

36

36
36
38
38
38
39
39
39

40

40
40
40
40
40
41
41
42
43
43
44

8 Operation

8.1 General

8.2 Start-Up

8.3 Shutdown

8.4 Use of the Control Panel

8.5 Frost Protection

9 Settings

9.1 Parameters

45

45
45
45
46
46

47

47

7212435 - 02 (08/14) EcoBlue Heat 5

Contents

10 Maintenance

10.1 General

10.2 Standard Inspection & Maintenance Operation

10.3 Specific Maintenance Operation

10.3.1 Spark Ignition Electrode

10.3.2 Automatic Air Vent

10.3.3 Condensate Trap

10.3.4 Removal of Ducts

10.3.5 Pressure Switch (21 & 24 only)

10.3.6 Flow Temperature Sensor

10.3.7 Overheat Sensor

10.3.8 Return Temperature Sensor

10.3.9 Parameter Unit

10.3.10 Gas Valve

10.3.11 Control & Fan Assembly

10.3.12 User Interaction Controller

10.3.13 Setting the Gas Valve (CO

11 Troubleshooting

11.1 Error Codes - Auto Reset

11.2 Lockout Condition

12 Decommissioning Procedure

12.1 Decommissioning Procedure

Check)

2

48

48
49
50
50
50
50
51
51
52
52
52
52
53
54
54
55

56

56
57

58

58

13 Spare Parts

13.1 General

13.2 Spare Parts List

14 Notes

Benchmark Commissioning Checklist

59

59
59

60

62

6 EcoBlue Heat

7212435 - 02 (08/14)

1 Introduction

1.1 General

Introduction 1

WARNING

Installation, repair and maintenance must only be
carried out only by a competent person. This
document is intended for use by competent persons,

All Gas Safe registered engineers carry an ID card with their
licence number and a photograph. You can check your engineer
is registered by telephoning 0800 408 5500 or online at
www.gassaferegister.co.uk

This appliance must be installed in accordance with the
manufacturer’s instructions and the regulations in force. If the
appliance is sold or transferred, or if the owner moves leaving
the appliance behind you should ensure that the manual is kept
with the appliance for consultation by the new owner and their
installer. 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 (as may be
amended from time to time).
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.

The appliance is designed as a boiler for use in residential
domestic environments on a governed meter supply only. The
selection of this boiler is entirely at the owner’s risk. If the
appliance is used for purposes other than or in excess of these
specifications, the manufacturer will not accept any liability for
resulting loss, damage or injury.

The manufacturer will not accept any liability whatsoever
for loss, damage or injury arising as a result of failure to
observe the instructions for use, maintenance and
installation of the appliance.

WARNING

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

7212435 - 02 (08/14) EcoBlue Heat 7

1 Introduction

1.2 Additional Documentation

1.3 Symbols Used

These Installation & Service Instructions must be read in
conjunction with the Flue Accessories & Fitting Guide supplied in
the Literature Pack.

Various timers, external controls, flue accessories, etc. are
available as optional extras. Full details are contained in the
relevant sales literature.

In these instructions, various levels are employed to draw the
user's attention to particular information. In so doing, we wish to
safeguard the user's safety, prevent hazards and guarantee
correct operation of the appliance. Each level is accompanied by
a warning triangle

DANGER

1.4 Abbreviations

Risk of a dangerous situation causing serious
physical injury.

WARNING

Risk of a dangerous situation causing slight physical
injury.

CAUTION

Risk of material damage.

Signals important information .

Signals a referral to other instructions or other pages
in the instructions.

8 EcoBlue Heat

DHW: Domestic hot water

CH: Central heating

GB: Great Britain

IE: Ireland

BS: British standard

HHIC: Heating and Hotwater Industry Council

CSM: Chimney Sweep Mode

PCB: Printed Circuit Board

PU: Parameter Unit

7212435 - 02 (08/14)

1.5 Extent of Liabilities

Introduction 1

1.5.1 Manufacturer's Liability

Our products are manufactured in compliance with the
requirements of the various european applicable Directives.
They are therefore delivered with marking and all relevant
documentation. In the interest of customers, we are
continuously endeavouring to make improvements in product
quality. All the specifications stated in this document are
therefore subject to change without notice.

The manufacturer will not accept any liability for loss, damage or
injury arising as a result of:-

Failure to abide by the instructions on using the appliance.
Failure to regularly maintain the appliance, or faulty or
inadequate maintenance of the appliance.
Failure to abide by the instructions on installing the
appliance.

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 current and relevant requirements of legislation and
guidance including 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.

Prior to commissioning all systems must be thoroughly
flushed and treated after installation with inhibitor (see
section 5.2.6). Failure to do so will invalidate the appliance
warranty.

Incorrect installation could invalidate the warranty and may lead
to prosecution.

7212435 - 02 (08/14) EcoBlue Heat 9

1 Introduction

1.5.2 Installer's Responsibility

The installer is responsible for the installation and initial start up
of the appliance. The installer must adhere to the following:

Read and follow the instructions given in the manuals
provided with the appliance.
Carry out installation in compliance with the prevailing
legislation and standards.
Ensure the system is flushed and inhibitor added.
Install the flue/chimney system correctly ensuring it is
operational and complies with prevailing legislation and
standards, regardless of location of the boiler’s installation.
Only the installer should perform the initial start up and carry
out any checks necessary.
Explain the installation to the user.
Complete the Benchmark Commissioning Checklist - this is a
condition of the warranty !
Warn the user of the obligation to check the appliance and
maintain it in good working order.
Give all the instruction manuals to the user.

1.6 Homologations

1.6.1 Certifications

EC - Declaration of Conformity

Baxi Heating Uk Limited being the manufacturer / distributor
within the European Economic Area of the following

Baxi EcoBlue Heat
declare that the above is in conformity with the provisions of the
Council Directive

2009/142 EC 92/42 EEC 2004/108 EC 2006/95 EC
and has been subject to the following conformity procedures laid
down in

Annex 2 - Article 3 of 2009/142 EC
under the supervision of the British Standards Institution, a
Notified Body authorized by the United Kingdom Competent
Authority, and carrying the Notified Body Number 0086.

1.6.2 Directives

The boiler meets the requirements of Statutory Instrument “ The
Boiler (Efficiency) Regulations 1993 N
meet the requirements of Directive 92/42/EEC on the energy
efficiency requirements for new hot water boilers fired with liquid
or gaseous fuels:-

o

3083” and is deemed to

10 EcoBlue Heat

Type test for purpose of Regulation 5 certified by:
Notified Body 0063.

Product/Production certified by:
Notified Body 0086.

For GB/IE only.

7212435 - 02 (08/14)

Introduction 1

1.6.3 Standards

Codes of Practice - refer to the most recent version

In GB the following Codes of Practice apply:
Standard Scope
BS 6891 Gas Installation.
BS 5546 Installation of hot water supplies for domestic

purposes.
BS EN 12828 Heating systems in buildings.
BS EN 12831 Heating systems in buildings - Calculation of

load.
BS EN 14336 Installation & commissioning of water based

heating systems.
BS 6798 Installation of gas fired hot water boilers.
BS 5440 Part 1 Flues.
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 12831 Heating systems in buildings - Calculation of

load.
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.

7212435 - 02 (08/14) EcoBlue Heat 11

2 Safety

2 Safety

2.1 General Safety Instructions

2.2 Recommendations

DANGER

If you smell gas:

1. Turn off the gas supply at the meter

2. Open windows and doors in the hazardous area

3. Do not operate light switches

4. Do not operate any electrical equipment

5. Do not use a telephone in the hazardous area

6. Extinguish any naked flame and do not smoke

7. Warn any other occupants and vacate the
premises

8. Telephone the National Gas Emergency Service
on:- 0800 111 999

WARNING

Installation, repair and maintenance must be carried
out by a Gas Safe Registered Engineer
(in accordance with prevailing local and national
regulations).

When working on the boiler, always disconnect the
boiler from the mains and close the main gas inlet
valve.

After maintenance or repair work, check the
installation to ensure that there are no leaks.

CAUTION

The boiler should be protected from frost.

Only remove the casing for maintenance and repair
operations. Replace the casing after maintenance
and repair operations.

12 EcoBlue Heat

7212435 - 02 (08/14)

2.3 Specific Safety Instructions

Safety 2

2.3.1 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.

• Before lifting the boiler, the circumstances of the installation
must be assessed, please use appropriate manual handling
techniques and equipment.

• 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
assess 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 !

7212435 - 02 (08/14) EcoBlue Heat 13

3 Technical Specification

3 Technical Specifications

3.1 Technical Data

Appliance Type C13 C33 C

Appliance Category CAT I

2H

Heat Input (Gross) Max Min

12 model kW 14.88 8.59

15 model kW 18.32 8.59

18 model kW 21.75 8.59

21 model kW 24.04 8.59

24 model kW 28.62 8.59

Heat Output

(Non Condensing 70° C Mean Water
Temp)
Max Min

12 model kW 13 7.5

15 model kW 16 7.5

18 model kW 19 7.5

21 model kW 21 7.5

24 model kW 25 7.5

Max Gas Rate (Natural Gas - G20)
(After 10 Mins)

m3/hr

12 model 1.42

15 model 1.75

18 model 2.07

21 model 2.29

24 model 2.73

Dynamic (nominal) Inlet Pressure

(Natural Gas - G20)

mbar 20

with a CV of 37.78 MJ/m

3

53

Horizontal
Flue Terminal Diameter 100mm
Dimensions Projection 125mm

Connections

Gas Supply - 22mm
Central Heating Flow
(compression fitting) - 22mm
Central Heating Return
(compression fitting) - 22mm
Condensate Drain - for 21.5mm
plastic waste pipe

Outercase Dimensions

Nox Class 5

Electrical Supply 230V~ 50Hz

(Appliance must be connected to an
earthed supply)

Power Consumption Max Rate

12 model W 17
15 model W 20
18 model W 23
21 model W 25
24 model W 33

External Fuse Rating 3A

Overall Height Inc Flue Elbow - 790mm
Casing Height - 625mm
Casing Width - 370mm
Casing Depth - 270mm

Clearances

Both Sides 5mm Min
Above Casing (Top Flue) 19 0mm Min
Above Casing (Rear Flue) 35mm Min
Below Casing (in Cupboard) 35mm Min

Internal Fuse Rating (Terminal Strip)

Fuse 1.6T

Electrical Protection IPX4D

Water Content

litres 1.7

Static Head

max 25 metres
Below Casing 120 mm Min
Front (For Servicing) 800mm Min

Low Head 0.4m min

Front (In Operation) 5mm Min

See Section 5.3.6 for full details !

Weights

Packaged Boiler Carton 21.5 kg
Installation Lift Weight 19.5 kg

System Detail

fully pumped open vented & sealed systems

Pressure Switch

12/15/18 Model - Not Fitted

CO/CO2Ratio Up to a maximum

21/24 Model - Fitted

of 0.004

Flow Temperature (adjustable)

30° C to 80° C (± 5° C)

Recommended System

NOTE: All data in this section are nominal

values and subject to normal production
tolerances.

Temperature Drop

Condensing 20°C 36°F

SEDBUK 2009 Declaration

12 model - 89.2% 21 model - 89.2%
15 model - 89.2% 24 model - 89.1%
18 model - 89.2%

SEDBUK 2005 Declaration

12 model - 90.2% 21 model - 90.1%
15 model - 90.2% 24 model - 90%
18 model - 90.1%

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 0063.

14 EcoBlue Heat

300

250

200

150

100

Pressure drop (mbar)

50

0

0.00.20.40.60.81.01.21.41.61.8

Pressure drop vs Flow

3

Flow (m

hr)

7212435 - 02 (08/14)

3.2 Dimensions and Connections

Technical Specifications 3

At Least

1.5°

DIMENSIONS

E

G

A 625mm

For clearances see
Section 5.3.6

B 270mm

C 370mm

D 116mm Ø Min.

A

E 165mm

F 155mm

G 110mm

B

360° Orientation

H 550mm

NOTE: There must be no part of the air duct
(white tube) visible outside the property after

D

C

installation. The flue seal should fit neatly and
effect a good seal.

Tube Ø 100mm

IMPORTANT: The 1.5° fall provided by the elbow is
to allow condensate to run back to the boiler, for
disposal through the condensate discharge pipe.
When using extensions the fall along the flue
system must be increased to 3°.
Where extensions are used ensure the clearance
above the top of the flue elbow (X) is as shown in
the table below:-

F

Y

6m max

Flue length (Y)

up to 1m

1m - 2m

2m - 3m

3m - 4m

X

4m - 5m

5m - 6m

Clearance (X)

30mm

84mm

134mm

186mm

238mm

290mm

At Least 3°

7212435 - 02 (08/14) EcoBlue Heat 15

3 Technical Specifications

3.3 Electrical Diagram

br

b

g/y

Safety
Thermostat

User Interaction

Gas Valve

Controller

3.1 Technical Data (cont)

g/y

Electrode

r

L

Electrical
Test Point

Mains

g/y

br

b

N

Pressure
Switch (where
fitted)

Not used

Return
Sensor

b

Flow
Sensor

r

Parameter

Unit

Loop Connector
(where no pressure
switch fitted)

16 EcoBlue Heat

Key To Wiring Colours

b - Blue

r - Red

br - Brown

g/y - Green/Yellow

All other wires are black

7212435 - 02 (08/14)

4 Description of the Product

4.1 General Description

Description of the Product 4

1. The Baxi EcoBlue Heat Range are gas fired wall mounted
powered flue condensing boilers.

2. The maximum output of the boiler is :-

12 model - 13 kW
15 model - 16 kW
18 model - 19 kW
21 model - 21 kW
24 model - 25 kW

Information
Label

Slide
Forward

Fig. 1

Data Label

3. The boiler modulates automatically to the system load up to
the set output. It is designed for use on Natural Gas (G20) only.

4. The two illuminated User Interaction Controller push buttons
provide information about the operating condition of the boiler.

5. The boiler is suitable for fully pumped open vented central
heating and domestic hot water systems and sealed systems.

6. An information label giving details of the model, serial number
and Gas Council number is situated on the front left underside of
the outercase and is accessed by pulling forward gently (Fig. 1).

7. The boiler data label is positioned on the inside lower right­hand side of the boiler and can be seen when the outercase
panel is removed (Fig. 1).

8. The boiler is intended to be installed in residential/domestic
environments on a governed meter supply only.

9. The boiler must be installed with one of the purpose designed
flues such as one of the standard telescopic flue kits detailed in
the Flue Accessories & Fitting Guide.

All systems must be thoroughly cleansed, flushed and
treated with inhibitor (see Section 5.2.6).

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

7212435 - 02 (08/14) EcoBlue Heat 17

3 Technical Specifications

4.2 Operating Principle

Mains On.

(CH or DHW demand)

1. Switched Live On: When the boiler switched live turns on
the boiler, a 20 second check cycle takes place. If the flow
temperature is less than the boiler set-point temperature the
ignition cycle will start. Pre-purge, Ignition and Burner on.

Self test cycle for 20s

(output setting displayed)

NO

temperature less

than set point ?

10 second pre-purge

5 second ignition

Flame detected ?

Burner on

Modulate output

Flow

YES

YES

NO

5th ignition attempt ?

YES

Ignition Lockout

2. Fan Pre-Purge: The boiler has a 10 second pre-purge (Fan
On, Spark Generator and Gas Valve off) before the start of the
ignition sequence.

3. Ignition: The boiler has a 5 second ignition period (Fan,
Spark Generator and Gas Valve on) and burner on occurs when
a flame is detected. If a flame is not detected within the 5
second ignition period then 4 more ignition attempts are made.
If a flame is not detected after the 5 ignition attempts the boiler
goes to an ignition lock-out and an error code is displayed.

4. Burner on: After a successful ignition, Burner on occurs (Fan
and Gas Valve on, Spark Generator off). The boiler flow
temperature is controlled by varying the fan speed (and thereby
the gas rate) to achieve the optimum boiler operation. If the
boiler flow temperature exceeds the boiler set-point, the burner
will turn off (Fan and Gas Valve off).

5. Overtemperature: If a boiler overtemperature event occurs
(triggering the safety thermostat) the burner shuts down (Fan off
and Gas Valve off). A locking signal is generated and an error
code is displayed.

6. Lockout: If a lock-out error is displayed (Fan, Spark
Generator and Gas Valve off) the boiler can only be reset by
manually pressing the reset button. If 5 lock-outs are reset
within a 1 hour period then boiler becomes inoperable. It is
necessary to switch off the power supply to the boiler, and when
reinstated the reset button pressed again to operate the
appliance.

Flow temp or

rate of rise too

high ?

Burner Off

NO

Over Temp

Fault ?

YES

Lockout

18 EcoBlue Heat

Any lock-out errors that occur regularly will require further
investigation and rectification.

Technical Enquiries: 0844 871 1555.

NO

YES

Mains Off

(Demand satisfied)

7212435 - 02 (08/14)

4.3 Main Components

4

Description of the Product 4

1. Heat Exchanger

2. Combustion Control Unit

3. Condensate Trap

8

4. Exhaust Tube

5. Inlet Silencer

6. User Interaction Controller

10

7. Gas Cock

8. Air Pressure Switch (21 & 24 model only)

9. System Drain Cock

10. Air Vent

1

5

2

9

6

3

7

7212435 - 02 (08/14) EcoBlue Heat 19

4 Description of the Product

4.4 Control Panel Description

4.4.1 USER INTERACTION CONTROLLER

(Control Panel) (Fig. 2)

Key to symbols

Heating Water Temperature

Sweep Key and Status Signals

Reset button and On/Off Signal

1. The User Interaction Controller has 2 illuminating push
buttons which provide information about the operating condition
of the boiler.

Fig. 2

2. The RESET button lights up green when the boiler has a
demand for CH or DHW.

3. The button can flash in a range of colours and at
different frequencies.

4. The User Interaction Controller also has one rotary knob. The
rotary knob can be used to set the maximum flow

temperature of the heating water.

Maximum temperature is 80°C

5. The temperature on this rotary knob must be set to a higher

temperature than the cylinder thermostat to achieve the required
hot water demand.

20 EcoBlue Heat

7212435 - 02 (08/14)

4.5 Standard Delivery

4.6 Accessories & Options

Description of the Product 4

1. The pack contains:

Boiler
Wall Fixing Bracket
Copper Tail (Gas Connection) and Fibre Washer
Power Lead
Literature pack

• Installation & Servicing Manual (including ‘benchmark’)

• User Guide

• Flue Accessories & Fitting Guide

• Service Contract Leaflet

• Registration Card

• Envelope

• Fernox Leaflet

• Wall Template

4.6.1 Optional Extras

1. Various items are available as optional extras.

Flue Accessories (elbows, extensions, clamps etc.)
(refer to the Flue Accessories & Fitting Guide supplied
in the literature pack.)
Remote relief valve kit
1M Condensate Drain Pipe ‘Trace Heating’ Element
2M Condensate Drain Pipe ‘Trace Heating’ Element
3M Condensate Drain Pipe ‘Trace Heating’ Element
5M Condensate Drain Pipe ‘Trace Heating’ Element

7212435 - 02 (08/14) EcoBlue Heat

21

5 Before Installation

5 Before Installation

5.1 Installation Regulations

WARNING

Installation, repair and maintenance must only be
carried out by a competent person. This document is
intended for use by competent persons.

Installation must be carried out in accordance with the prevailing
regulations, the codes of practice and the recommendations in
these instructions.

Installation must also respect the following points:

This instruction manual and any other applicable
documentation.
Building Regulations.
British Standards.
92/42/EEC Efficiency Directive.
2009/142/EC Gas Appliance Directive.
2006/95/EC Low Voltage Directive.
2004/108/EC Electromagnetic Compatibility Directive.
Gas safety regulations.
Water supply regulations.

5.2 Installation Requirements

5.2.1 Gas Supply

1. The gas installation should be in accordance with the relevant

standards. In GB this is BS 6891 (NG). In IE this is the current
edition of I.S. 813 “Domestic Gas Installations”.

2. The connection to the appliance is a 22mm copper tail

located at the rear of the gas service cock.

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.

4. The gas service cock incorporates a pressure test point.

22 EcoBlue Heat

7212435 - 02 (08/14)

Description of the Product 4

5.2.2 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 ~ 50Hz fused at 3A.

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.
Isolation of the boiler can be checked at the electrical
test point.

5.2.3 Hard Water Areas

1. If the area of the installation is recognised as a HARD
WATER AREA then this must be taken into account when filling
the system.

5.2.4 Bypass

1. An automatic bypass must be fitted on the system for
protection of the boiler and pump.

5.2.5 System Control

1. The system must be fitted with thermostats and TRVs to
comply with Part L of the Building Regulations.

5.2.6 Treatment of Water Circulating Systems

1. All recirculatory water systems will be subject to corrosion
unless they are flushed and an appropriate water treatment is
applied. To prevent this, follow the guidelines given in BS 7593
“Treatment of Water in Domestic Hot Water Central Heating
Systems” and the treatment manufacturers instructions.

2. 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 cleansing 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. Complete the label supplied with the inhibitor and attach to
the inside of the boiler case. Detail of system treatment should
be added for future reference.

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

7212435 - 02 (08/14) EcoBlue Heat 23

5 Before Installation

5.2.7 System Details - General

Flow

Return

Fig. 3

400mm

Min Head

Flow

Fig. 4

22mm
Open Vent

400mm

Min Head

Pump

Flow

If Conditions Require,

This System Possible

Copper

0.4m

Copper

1m

22mm
Open Vent

15mm

Cold

Feed

Pump

500mm

45°

150mm

Max

Return

1000mm

Min

Boiler

Typical Low Head Installation

500mm

45°

15mm

Cold

Feed

150mm

Max

Return

1000mm

Min

Fig. 5

Copper

0.6m

Boiler

Boiler

Water Circulating Systems

1. The appliance is suitable for use with open vent fully pumped
systems and sealed systems .
The following conditions should be observed on all systems:

• The static head must not exceed 25m of water.

• The boiler must not be used with a direct cylinder.

• Drain cocks should be fitted to all system low points.

• All gas and water pipes and electrical wiring must be
installed in a way which would not restrict the servicing
of the boiler.

• Position isolating valves as close to circulating pump as
possible.

Pipework

1. The sizes of flow and return pipes from the boiler should be
determined by normal methods, according to the requirements
of the system. The connections on the boiler are 22mm.

2. A 20 °C (36°F) drop in temperature across the system is
recommended for condensing boilers. Existing radiators may be
oversized and so allow this, but where radiator sizing is
marginal it may be advisable to retain a system temperature
drop of 11°C (20°F).

3. In systems using non-metallic pipework it is necessary to use
copper pipe for the boiler Flow and Return. The copper must
extend at least 1 metre from the boiler and include any branches
(Fig. 3).

5.2.8 Low Head Installation / Open

1. Using a close coupled arrangement the minimum head is as
shown in the diagrams (Figs. 4, 5 & 6) subject to the following
conditions:

a) The pump being adjusted to give a 20°C drop across

the boiler.

b) Ideally the pump should be fitted on the flow but
providing that the cold feed and open vent pipe are
positioned correctly (e.g. the system is not prone to
pumping over, air entrainment etc.) the pump may be
fitted on the primary return pipe.

c) The pump must be fitted in accordance with the
pump manufacturer's instructions.

d) The open vent pipe must be taken up from a tee in a
horizontal section of the flow pipe.

Flow

Fig. 6

Alternative Low Head Installation

24 EcoBlue Heat

22mm

Feed & Vent

Pipe

Separator

Pump

Air

Return

200mm

Min

400mm

Min Head

Boiler

Venting

1. A method of venting the system during filling and
commissioning is provided by an automatic air vent fitted inside
the boiler. The air vent is supplied in the open position.

7212435 - 02 (08/14)

Before Installation 5

3 Litre Top Up Bottle
(if required)

Radiator
Circuit

Max Boiler Flow

Temp = 82° C

Fig. 7

Method of determining minimum valve of

Static

Head

( m)

<5

Air

Vent

Filling

Point

Pump

Expansion
Vessel

expansion vessel volume for sealed

systems using Baxi Boilers

Vessel

Charge

Pressure

(Bar)

0.5

Pressure

System Drains
at Low Point

Initial

System

(Bar)

0.5

1.0

1.5

2.0

Pressure

Gauge

Multiply Total

Water Content

Of System By

(Litres)

0.067

0.112

0.207

0.441

Safety

Valve

Boiler

5.2.9 Sealed Systems Details

1. SAFETY VALVE - A safety valve complying with the
requirements of BS 6750 Part 1 must be fitted close to the
boiler on the flow pipe by means of a horizontal or vertically
upward connection with no intervening valve or restrictions and
should be positioned to facilitate testing. The valve should be
pre-set and non-adjustable to operate at a pressure of 3 bar
(45 Ibf/in2). It must be arranged to discharge any water or
steam through a pipe to a safe outlet position.

2. PRESSURE GAUGE - A pressure gauge of minimum range
0-4 bar (0-60 Ibf/in2) with a fill pressure indicator must be fitted
to the system, preferably at the same point as the expansion
vessel in an easily visible position.

3. EXPANSION VESSEL - An expansion vessel complying with
the requirements of BS 4814 must be fitted to the system by
means of a connection close to the inlet side of the circulating
pump in accordance with the manufacturers instructions, the
connecting pipe being unrestricted and not less than 15mm
(1/2 in) nominal size. The volume of the vessel should be
suitable for the system water content and the nitrogen or air
charge pressure should not be less than the system static head
(See Table. 1a).

Further details of sealed system design can be
obtained from BS 5449 and the British Gas publication entitled
'Specifications for Domestic Wet Central Heating Systems'.

<10

<15

Example :-

Table. 1a

Then :-

Where a vessel of the calculated size is not obtainable

then the next available larger size should be used.

Return

CH

1.0

1.5

System Volume = 75 litres
Vessel Charge Pressure = 1.0 bar
Initial System Pressure = 1.5 bar
75 x 0.152 = 11.4 litres
Expansion Vessel Volume

Stop
Valve

Temporary
Hose

1.0

1.5

2.0

1.5

2.0

NOTE

Double
Check
Valve

Stop
Valve

0.087

0.152

0.330

0.125

0.265

Mains
Cold
Supply

4. FILLING POINT - 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. The sealed primary circuits may be filled
or replenished by means of a temporary connection between
the primary circuit and a supply pipe provided a ‘Listed’ double
check valve or some other no less effective backflow
prevention device is permanently connected at the inlet to the
circuit and the temporary connection is removed after use. The
filling method adopted must be in accordance with all relevant
water supply regulations and use approved equipment.
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. MAKE UP SYSTEM - A method of replacing water lost from
the system should be provided either by means of a make up
vessel of not more than 3 litres (5 pints) capacity, mounted
above the highest point of the system, or by re-pressurisation
of the system.

6. VENTING - A method of venting the system during filling and
commissioning is provided by an automatic air vent fitted inside
the boiler. The air vent is supplied in the open position.

7. HOT WATER STORAGE - The hot water storage vessel
must be of the indirect coil type. All components used in the
system must be suitable for operation at 110°C (230°F) and at
the pressure allowed by the safety valve.

Fig. 8

7212435 - 02 (08/14) EcoBlue Heat 25

5 Before Installation

5.3 Choice of the Location

Zone 2

Window
Recess

Zone 1

Zone 2

Zone 0

0.6 m

Window
Recess

Zone 2

Fig. A

In GB Only

5.3.1 Location of the Appliance

Due to the high efficiency 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 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).

2. If the boiler is sited in an unheated enclosure then it is
recommended to incorporate an appropriate device for frost
protection in the system controls.

3. If the boiler is fitted in a room containing a bath or shower it
MUST NOT BE fitted in zone 0 or 1, ONLY within the shaded
area (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.

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).

5.3.2 Data Plate

Zone 1

Zone 0

Fig. B

Window Recess
Zone 2

Zone 2

0.6 m

Outside Zones

In GB Only

2.25 m

Ceiling

1. The boiler data label gives details of the model, serial number
and Gas Council number and is situated on the lower right hand
inside face of the outercase. It is visible when the outercase
front panel is removed (Fig. 5).

5.3.3 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.

5.3.4 Ventilation

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.

26 EcoBlue Heat

7212435 - 02 (08/14)

Before Installation 5

Examples are shown of the following methods of
termination:­i) to an internal soil & vent pipe
ii) via an internal discharge branch (e.g. sink waste)
downstream of the trap
iii) to a drain or gully
iv) to a purpose made soakaway
v) pumped into an internal discharge branch (e.g.
sink waste) downstream of the trap
vi) pumped into an external soil & vent pipe
vii) to a drain or gully with extended external run &
trace heating

It is strongly recommended to discharge
internally into the household drainage system. If
connecting to a rain water drain, that drain MUST
discharge into a foul drain.

21.5mm

32mm

i) Termination to an internal soil

and vent pipe

Insulation

5.3.5 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. CORRECT INSTALLATION IN
ACCORDANCE WITH THIS SECTION WILL
CONSIDERABLY MINIMISE THE LIKELIHOOD OF
BLOCKAGE AND SUBSEQUENT BOILER LOCK-OUT.

A CONDENSATE DISCHARGE PUMP AND PIPE
‘TRACE HEATING’ ARE AVAILABLE AS
ACCESSORIES - see paragraphs 5.3.5.12 to 5.3.5.15
for further details.

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
EXCEPT when employing a suitable condensate pump
in basement and cellar or similar applications.

50mm per metre of pipe run

2.5° Minimum fall

450mm min*

*450mm is applicable to properties up
to 3 storeys.
For multi-storey building installations
consult BS 6798.

Boiler

Sink

50mm per metre

of pipe run

2.5° Minimum fall

ii) External termination via
internal discharge branch
e.g sink waste - downstream*

The boiler condensate trap incorporates a water seal of
75mm, therefore it is unnecessary to install an
additional air break and trap in the discharge pipework.

1. The condensate outlet will accept 21.5mm (

3

/4in) plastic

overflow pipe. It is strongly recommended that this

discharges internally into the household drainage system.

Where this is not possible, discharge into an outside drain is
permissible providing every possible precaution is taken to
prevent freezing.

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 detailed 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 of the correct design to
prevent sagging.

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

Pipe must terminate
above water level but
below surrounding
surface. Cut end at 45°

*It is NOT RECOMMENDED to connect upstream
of the sink or other waste water receptacle !

7212435 - 02 (08/14) EcoBlue Heat 27

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 with material suitable for external use.

5 Before Installation

Boiler

2.5° Minimum fall

Pipe must terminate above water level
but below surrounding surface. Cut
end at 45°

iv) Termination to a purpose made
soakaway

Further specific requirements for

Boiler

soakaway design are referred to in
BS 6798.

50mm per metre

of pipe run

2.5° Minimum fall

iii) Termination to a drain
or gully

50mm per metre
of pipe run

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

10. In all cases discharge pipe must be installed to aid disposal
of the condensate. To reduce the risk of condensate being
trapped, as few bends and fittings as possible should be used
and any burrs on cut pipe removed.

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 back­pressure may force water out of the boiler trap and cause
appliance lockout.

12. A boiler discharge pump is available, ‘MULTIFIT’
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. Follow the instructions supplied
with the pump.

500mm min

13. Condensate Drain Pipe ‘Trace Heating’ Elements are
available in various lengths. ‘MULTIFIT’ part nos.:-

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

v) pumped into an internal discharge branch
(e.g. sink waste) downstream of the trap

Sink

5m

vi) pumped into an external soil & vent pipe

Unheated Location
(e.g. Garage)

5m

50mm per metre of pipe run

2.5° Minimum fall

Basement or

Boiler

50mm per metre of pipe run

Boiler

similar
(heated)

Condensate Pump

2.5° Minimum fall

Basement or similar
(heated)

Pipe must terminate
above water level but
below surrounding
surface. Cut end at 45°

1 metre 720644401
2 metre 720664101
3 metre 720664201
5 metre 720664401*

*Where the drain is between 3 & 5 metres a 5 metre kit can be
used and “doubled back” upon itself.

14. It is possible to fit the element externally on the condensate
drain or internally as detailed in the instructions provided.

15. The fitting of a ‘Trace Heating’ Element is NOT a substitute
for correct installation of the condensate drain. ALL
requirements in this section must still be adhered to.

vii) to a drain or gully with extended
external run & trace heating

The ‘Trace Heating’ element must be installed in

Boiler

50mm per metre of pipe run

2.5° Minimum fall

accordance with the instructions supplied.
External runs & those in unheated locations still
require insulation.

Pipe must terminate
above water level but
below surrounding
surface. Cut end at 45°

28 EcoBlue Heat

Condensate
Pump

7212435 - 02 (08/14)

Before Installation 5

5.3.6 Clearances - Access in Service

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
(Figs. 9 & 10). 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.

*These are MINIMUM recommended dimensions. Greater
clearance will aid installation and maintenance.

At least

1.5°

Fig. 9

270mm

800mm Min

For Servicing

Purposes

5mm Min

In Operation

5mm Min

370mm

5mm Min

190 mm

625mm

35mm Min*

in Cupboard

120mm Min*

35mm Min when in

cupboard 300mm deep

120mm Min when over

surface 600mm deep

7212435 - 02 (08/14) EcoBlue Heat 29

5 Before Installation

5.3.7 Flue/Chimney Location

1. The following guidelines indicate the general requirements for
siting balanced flue terminals. For GB recommendations are
given in BS 5440 Pt 1. For IE recommendations are given in the
current edition of I.S. 813 “Domestic Gas Installations”.

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.

R

N

M

I

I

F

L

Likely flue positions requiring
a flue terminal guard

J,K

T

U

D

C

E

I

A

S

I

B

F

A

G

A

H

H

J,K

I

Fig. 11

Terminal Position with Minimum Distance (Fig. 11) (mm)

1

Directly below an opening, air brick, opening windows, etc. 300

A

1

B

Above an opening, air brick, opening window etc. 300

1

C

Horizontally to an opening, air brick, opening window etc. 300

2

D

Below gutters, soil pipes or drain pipes. 25 (75)

2

E

Below eaves. 25 (200)

2

F

Below balconies or car port roof. 25 (200)

2

G

From a vertical drain pipe or soil pipe. 25 (150)

2

H

From 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

1

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.

2

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.

30 EcoBlue Heat

7212435 - 02 (08/14)

Flue
Deflector

Terminal
Assembly

Top View Rear Flue

300 min

Before Installation 5

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.

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.

*4. The distance from a fanned draught appliance terminal
installed parallel to a boundary may not be less than 300mm in
accordance with the diagram opposite (Fig. 12).

Reduction to the boundary is possible down to 25mm
but flue deflector part no. 5111068 or the appropriate
Plume Displacement Kit must be used. The nuisance
factor must still be taken into account when these
options are being considered.

Fig. 12

Plume
Displacement
Kit

Air Inlet

Property Boundary Line

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

Opening
Window or Door

150mm

Fig. 13

7212435 - 02 (08/14) EcoBlue Heat 31

MIN.

5 Before Installation

5.3.8 Horizontal Flue/Chimney Systems

1. The standard telescopic flue is suitable only for horizontal
termination applications. It allows for lengths between 315mm

(ii)

(i)

and 500mm from elbow to terminal without the need for cutting
(Fig. 14). Extensions of 250mm, 500mm & 1m are available.

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 Horizontal Concentric equivalent flue
lengths are:-

(60/100) (80/125)
6 metres 12 metres

4. Any additional “in line” bends in the flue system must be taken
into consideration. Their equivalent lengths are:-

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.

Fig. 14

315mm 500mm

Horizontal
Flues

Flue Trims

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

Read this section in conjunction with the Flue
Accessories & Fitting Guide supplied with the boiler. That
document includes details of vertical flue/chimney systems and
Plume Displacement Kits.

This bend is
equivalent to 1 metre

A

C

(ii)

B

(i)

This bend is equivalent
to 1 metre

Total equivalent length =

32 EcoBlue Heat

A+B+C+2 x 90° Bends

NOTE: Horizontal flue extensions should

always be installed with a fall of at least
3° from the terminal to allow condensate
to run back to the boiler.

7212435 - 02 (08/14)

Fig. 15

Terminal

Guard

Before Installation 5

5.3.9 Flue/Chimney Trim

1. The flexible flue trims supplied can be fitted on the outer and
inner faces of the wall of installation (Fig. 14).

5.3.10 Terminal Guard

1. When codes of practice dictate the use of terminal guards
(Fig. 15) ‘Multifit’ accessory part no. 720627901 can be used
(NOTE: This is not compatible with Flue Deflector referred too
below).

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

3. When ordering a terminal guard, quote the appliance name
and model number.

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

Flue Deflector

Fig. 16

5.3.11 Flue/Chimney Deflector

1. Push the flue deflector over the terminal end, it may point
upwards as shown, or up to 45° either way from vertical. Secure
the deflector to the terminal with screws provided (Fig. 16).

5.3.12 Flue/Chimney Accessories

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

WARNING

SUPPORT - All flue systems MUST be securely
supported, a MINIMUM of once every metre and at
each change of direction. 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.

7212435 - 02 (08/14) EcoBlue Heat 33

5 Before Installation

5.4 Unpacking & Initial Preparation

Fig. 18

Part No. 7212282-01

116mm Dia Minimum
Aperture For Flue Tube

Heating

Heating

Position of Elbow Rear Flue

Return

Flow

(22mm)

56mm

Part No. 7212282-01

60mm

Securing Points

110mm Dia Minimum
Aperture For Flue Tube

Securing Points

5 mm Minimum
Side Clearance

Profile of
Outercase

95mm

(22mm)

Vertical Flue
Centre Line

WALL FIXING BRACKET

IMPORTANT: For ease of installation it is
recommended that the horizontal tongues
and slots are visible whilst mounting the
appliance. Familiarise yourself with the
method of fixing and retaining before
commencing.

IMPORTANT

The minimum clearances must be

maintained for regular operation

and servicing.

Condensate

Drain Connection

25mm Min
Cupboard
Clearance

120mm Minimum
Clearance

Wall Bracket

155mm

For Side Flue Exit

Fig. 19

Safety

Bracket

Fig. 21

Sealing

Caps

200mm Minimum
Clearance

35mm Minimum

Boiler Mounting Bracket

Clearance for

Horizontal Securing Tongue

Rear Flue

Locate the slots in the boiler
hanging bracket over the
horizontal securing tongues

5 mm Minimum
Side Clearance

Gas
Inlet

(22mm)

Fig. 20

5.4.1 Unpacking

1. Follow the procedure on the carton to unpack the boiler. See
Section 2.3.1 Handling before lifting the boiler.

5.4.2 Initial Preparation

1. After considering the site requirements, position the fixing
template on the wall ensuring it is level both horizontally and
vertically (Fig. 20).

2. Mark the position of the four most suitable fixing slots for the
wall bracket, the lower securing point and the position of the
centre of the flue hole whether rear, top or side flue.

3. If required, mark the position of the gas and water pipes, and
the electrical supply. Remove the template.

4. Cut the hole for the required flue position (rear, top or side)
using a minimum diameter of 116mm.

5. Drill the wall as previously marked to accept suitable wall
plugs. Secure the wall bracket using appropriate fixing screws.

6. Using a spirit level ensure that the bracket is level before
finally tightening the screws (Fig. 21).

Electrical
Socket

47mm

Mains Input

142mm

7. For top flue installation, the flue can be fitted after the boiler
has been fitted to the wall bracket (see Section 6.1).

If the boiler is being fitted in a cupboard or other place
where clearance underneath will be at the minimum
35mm (see Section 5.3.6) all soldering and pipework
should be completed prior to installation. Also the lower
panel retaining cords can be dispensed with - See
Section 10.2 for removal of the lower panel - the cords
can then be disconnected.

8. Lift the boiler using the lower polystyrene packing and locate
the slots in the wall bracket over the horizontal tongues on the
wall bracket. As the boiler is pushed back the wall bracket spring
latch will positively engage over the wall bracket (Figs. AA, BB &
CC).

Fig.22

34 EcoBlue Heat

Lower Securing

Point Screw

Fig. AA

Snap off rear polystyrene
and lift using lower
polystyrene (can be
discarded if space is limited)

9. Locate the slots in the safety bracket over the two vertical
tongues on the wall bracket and secure with the two screws
(Fig CC). Adjust the jack screw to ensure the boiler is fully
vertical and then insert the lower securing screw.

Fig. CC

7212435 - 02 (08/14)

Safety
Bracket

Screw

Horizontal
Tongue

Fig. BB

Spring
Latch

Before Installation 5

5.4.3 Making the Water Connections (Fig. 22)

1. There are two water connections at the top of the boiler. The
left connection is the return pipe (indicated with blue label) and
the flow the right hand one (indicated with red label). Remove the
sealing caps from the boiler connections.

2. It is essential that the flow and return pipes are connected to
the boiler correctly. The boiler connections will accept 22mm
compression fittings.

3. For a top flue installation make sure the water connections do
not clash with the flue position.

When soldering of joints is to be performed under
the boiler the condensate trap must be removed
to prevent damage.

5.4.4 Filling the Condensate Trap

1. The condensate trap must be filled with water before the
boiler is commissioned.

90° rubber hose

Sealing Cap - to

be discarded

Fig. 23

Condensate
Trap

2. If access to the condensate trap is impeded remove the facia
panel with the User Interaction Controller.

3. Disengage the condensate trap retaining clip and carefully
pull out the trap. Remove and discard the sealing cap.

4. Fill the condensate trap with tap water to a depth of
approximately 75mm.

5. Carefully relocate the condensate trap in the boiler ensuring
all seals are located properly and reattach the retaining clip.

6. If necessary remove the boiler front panel to inspect that the
seals are located properly and refit the facia panel with the User
Interaction Controller.

5.4.5 Connecting the Condensate Drain (Fig. 23)

1. Using the 90° rubber hose supplied, connect the condensate
drain pipework to the boiler condensate trap outlet pipe.

Ensure the discharge of condensate complies with any
national or local regulations in force (see British Gas “Guidance
Notes for the Installation of Domestic Gas Condensing Boilers”
& HHIC recommendations) and Section 5.3.5.

Elbow & Nut

2. The hose will accept 21.5mm (3/4in) plastic overflow pipe
which should generally discharge internally into the household

Sealing
Washer

Gas Cock

drainage system. If this is not possible, discharge into an
outside drain is acceptable.

5.4.6 Connecting the Gas Supply (Fig. 23a)

1. The elbow and nut assembly supplied must be used to
connect to the gas supply. The flared end of the elbow is
22mm O.D.

Fig. 23a

7212435 - 02 (08/14) EcoBlue Heat 35

2. Engage the nut onto the gas cock, ensuring that the sealing
washer is in place. Tighten the nut.

6 Installation

6 Installation

6.1 Air Supply / Flue Gas Connections

315mm 500mm

Terminal Assembly

Connection Assembly

Fig. 24

6.1.1 Connecting the Top 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.

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 40mm engagement into the elbow).

Wall Thickness

(X)

Fig. 25

‘TOP’ Label

(X)

Wall

Thickness

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

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 40mm. 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. 26). Ensure that the labels
marked ‘TOP’ on the Terminal and Connection Assemblies are
uppermost.

Dimension ‘Y’

Sealing Tape

9. Using the clearance holes in the Connection Assembly
secure it to the Terminal Assembly using the screws supplied
(Fig. 27).

‘Peak’ to be

uppermost

Fig. 26

36 EcoBlue Heat 7212435 - 02 (08/14)

‘TOP’ Label

Securing Screw

Fig. 27

Spring Latch

Horizontal
Tongue

Fig. AA Fig. BB

Safety
Bracket

Screw

Installation 6

10. Lift the boiler and locate the slots in the wall bracket over
the horizontal tongues on the wall bracket. As the boiler is
pushed back the wall bracket spring latch will positively engage
over the wall mounted bracket (Figs. AA, BB & CC).

11. Locate the slots in the safety bracket over the two vertical
tongues on the wall bracket and secure with the two screws
(Fig CC).

12. Insert the flue through the hole in the wall. Fit the elbow to
the boiler adaptor, ensuring that it is pushed fully in (Fig. 29).

13. 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).

Boiler Elbow

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

Ensure 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

Fig. CC

Adaptor

Fig. 29

14. 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).

It is essential that the flue terminal is fitted as shown to

ensure correct boiler operation and prevent water

entering the flue. There must be no part of the air duct

(white tube) visible outside the property after

installation.

15. Make good between the wall and air duct outside the
building, appropriate to the wall construction and fire rating.

16. If necessary fit a terminal guard (see Section 5.3.11).

If not already done so, make the water connections, fill
the condensate trap, connect the condensate drain and connect
the gas supply as described in Sections 5.4.3, 5.4.4, 5.4.5 &

5.4.6 respectively.

Fig. 30

Slots at bottom

7212435 - 02 (08/14) EcoBlue Heat 37

Fig. 31

6 Installation

6.2 Electrical Connections

321

6.2.1 Electrical Connections of the Appliance

1. See Section 5.2.2. for details of the electrical supply. 1.3
metres of 3 core cable and a multipin male plug connected to a
female socket at the left rear are supplied with the boiler. The
cable live must be connected to the boiler switched live control.

N

2. If necessary the cable can be replaced by one of greater
length providing it is of equivalent specification (Fig. 32).

6.2.2 Connecting External Devices

Fig. 32

Key to colours

b - Blue
br - Brown
w - White
o - Orange
gr - Grey
g/y - Green/Yellow

230V
50Hz

L NE

g/y

Room

Stat

1. System Controls - This boiler operates on a switched live only.
If there is a permanent live in the existing supply it can be
connected to spare terminals 2 or 3 of the plug supplied.

2. To comply with Part L1 of the Building Regulations the heating
system into which the boiler is installed should include the
following:

a) Zone Controls
b) Timing Controls
c) Boiler Control Interlocks (Room & Cylinder
Thermostats)

3. Such a system needs to be fully pumped and must provide
independent temperature and time control to both the heating
and hot water circuits.

4. An automatic bypass must be fitted on the system for

3 Core Cable Connection

protection of the boiler and pump.

5. Connection diagrams for Y and S plan systems are shown.

230V

b

w

Cylinder

Stat

1

C 2

Y Plan

Diverter

Valve

gr

o

50Hz

L NE

gr

Motor

b

S Plan

br

Valve

g/y

Room

Stat

b

Cylinder

Stat

Boiler

L NE

gr

Motor

br

o

S Plan

g/y

Valve

o

Boiler

L NE

Timer

L

N

CH on
HW on
HW off

Pump

LNE

Y Plan, Room Thermostat System, CH Interlocked By Room
Thermostat

At least the Radiator(s) near the Room Thermostat not TRV’d
Pump run from Switched Live

Timer

L

N

CH on

HW on

Pump

LNE

S Plan, Room Thermostat System, CH Interlocked By Room
Thermostat

At least the Radiator(s) near the Room Thermostat not TRV’d
Pump run from Switched Live

38 EcoBlue Heat 7212435 - 02 (08/14)

6.3 Filling the System

6.4 Completing the Installation

Installation 6

See Section 5.2.6. for details of treating the system,
Section 5.2.7. for open vent system details, Section 5.2.9. for
sealed system details and Section 5.4.4. for filling the
condensate trap.

6.4.1 Completion

1. Before turning on the electrical and gas supply to commission
the boiler, check that all the installation requirements for the
chosen heating system and flue options have been satisfied.

2. Ensure that the system is vented to expel any excess air.

7212435 - 02 (08/14) EcoBlue Heat 39

7 Commissioning

7 Commissioning

7.1 General

7.2 Checklist before Commissioning

1. Reference should be made to BS:EN 12828 & 14336 when
commissioning the boiler.

2. At the time of commissioning, complete all relevant sections of
the Benchmark Checklist at the rear of this publications.

3. Turn the gas supply on and purge according to in GB BS 6891
and in IE I.S. 813 “Domestic Gas Installations”.

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.

7.2.1 Preliminary Electrical Checks

7.3 Commissioning Procedure

1. Prior to commissioning 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.

7.2.2 Checks

Check that the boiler has been installed in accordance with
these instructions.
Check the integrity of the flue system and the flue seals.
Check the integrity of the boiler combustion circuit and the
relevant seals.
Check the integrity of all gas and water joints.

CAUTION

On first firing the boiler, an odour may be present for
a short period.

1. Open the main gas supply.

2. Open the gas cock on the boiler.

3. Set the controls (thermostats, control system) so that they
request heat to turn the boiler on.

4. The boiler incorporates an automatic air vent. As supplied
this is in the open position to allow venting of the system.

40 EcoBlue Heat 7212435 - 02 (08/14)

7.4 Gas Settings

Commissioning 7

Flue Sampling

Point

Plug

Analyser Probe

After refitting the sampling point
plug ensure there is no leakage
of products !

7.4.1 ‘Chimney Sweep’ Mode (CSM)

1. The current operating condition of the boiler is shown by the
button on the User Interaction Controller. The

button can flash in a range of colours and at different
frequencies.

2. Follow the flow chart on the next page to comply with the

requirement to check combustion on commissioning.

3. Setting the boiler to maximum and minimum heat outputs is

achieved as follows;

• Press the button for 3 seconds.

• CSM is activated and will go to the min rate.

• Pressing again will make it adjust to max rate.

• To exit press the RESET for 3 seconds.

Fig. 33

7212435 - 02 (08/14) EcoBlue Heat 41

7 Commissioning

7.4.2 ‘Chimney Sweep’ Mode - Combustion Check

Verify Flue Integrity

Indication that products of
combustion & inlet air are
mixing - further
investigation is required.
Check all flue components
are correctly assembled,
fixed & supported. Check
the flue & terminal are
unobstructed.

Is O

2  20.6% and

CO

2 < 0.2% ?

No

TURN APPLIANCE OFF !

Call 0844 871 1555 for
advice.
The appliance MUST NOT
be commissioned until all
problems are identified
and resolved.

Set Boiler to Maximum Rate

Allow the combustion to
stabilise. Do not insert probe
to avoid ‘flooding’ the analyser.

Perform Flue Integrity
Combustion Check

Insert the analyser probe into
the air inlet test point, allowing
the reading to stabilise.

No

Is O

2  20.6% and

CO

2 < 0.2% ?

Yes

Verify Integrity of Seals

Check all burner seals,
internal flue seals, door &
case seals. Replace any
seals that appear unsound.

Is CO < 350ppm
and CO/CO
< 0.004 ?

2 ratio

1. Follow the flow chart opposite.

Check CO & Combustion
Ratio at Maximum Rate

Whilst the boiler is still

Yes

operating at maximum insert
the analyser probe into the
flue gas test point, allowing
the reading to stabilise.

No

Is CO < 350ppm
and CO/CO
< 0.004 ?

Yes

2 ratio

Set Boiler to Minimum Rate

Allow the combustion to

Yes

stabilise. Do not insert probe
to avoid ‘flooding’ the
analyser.

Check CO & Combustion
Ratio at Minimum Rate

Whilst the boiler is
operating at minimum insert
the analyser probe into the
flue gas test point, allowing
the reading to stabilise.

No

TURN APPLIANCE OFF !

Call 0844 871 1555 for advice.

No

The appliance MUST NOT be
commissioned until all
problems are identified and
resolved.
If commissioning cannot be
fully completed the appliance
must be disconnected from the
gas supply in accordance with
the GSIUR.
Note: Check & record the CO
& combustion ratio at both
maximum & minimum rates
before calling 0844 871 1555.

42 EcoBlue Heat 7212435 - 02 (08/14)

Is CO < 350ppm
and CO/CO

2 ratio

< 0.004 ?

Yes

BOILER OPERATING

SATISFACTORILY. NO

FURTHER ACTION

REQUIRED

Ensure test points are capped,
the boiler case front panel is
correctly fitted & secured and
all other commissioning
procedures completed.
Complete the ‘Benchmark’
Checklist, recording the CO &
combustion ratio readings as
required.

7.5 Configuring the System

Commissioning 7

7.5.1 Check the Operational (Working) Gas Inlet
Pressure

1. Ensure that all controls are calling for heat and maximum load

is applied to the system.

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.
This must be AT LEAST 17mb ! (Fig. 34)

3. Ensure that this inlet pressure can be obtained with all other

gas appliances in the property working.

Measure the Gas Rate

4. With any other appliances & pilot lights turned OFF the gas

rate can be measured. It should be as shown in Section 3.1
Technical Data.

5. 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.

Check gas pressure here

17-21 mbar

Gas Valve

Gas Cock

18-22 mbar

19-23 mbar

Gas Meter

Fig. 34

Working Gas Pressures

If the pressure drops are greater than shown
above a problem with the pipework or connections
is indicated.

7212435 - 02 (08/14) EcoBlue Heat 43

7 Commissioning

7.6 Final Instructions

1. 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.

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

3. Hand over the User’s Operating, Installation and Servicing
Instructions, giving advice on the necessity of regular servicing.

4. 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.

5. Instruct the user in the operation of the boiler controls. Hand
over the User’s Operating, Installation and Servicing
Instructions, giving advice on the necessity of regular servicing.

6. 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 switched, and to ventilate the property.

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

8. 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.

9. Complete the label supplied with the inhibitor and stick to the
inside of the boiler case. Detail of system treatment must be
recorded in the Benchmark Commissioning Checklist.

44 EcoBlue Heat 7212435 - 02 (08/14)

8 Operation

8.1 General

Operation 8

1. It is the responsibility of the installer to instruct the user in the

day to day operation of the boiler and controls and to hand over
the completed Benchmark Checklist at the back of this manual.

2. Set the central heating and hot water temperatures to the

requirements of the user. Instruct the user in the operation of the
boiler and system.

3. The temperature on the boiler rotary knob must be set to a

higher temperature than the cylinder thermostat to achieve the
required hot water demand.

4. Instruct the user in the operation of the boiler and system

controls.

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 switched, and to ventilate the property.

8.2 Start-up

8.3 Shutdown

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.

8. When installed on a sealed system the method of

repressurising the primary system should be demonstrated.

1. Switch on the boiler at the fused spur unit and ensure that the

time control is in the on position and any other controls (i.e.
room thermostat) are calling for heat.

2. The boiler will begin it start sequence.

3. The orange LED will flash at EVERY heating demand. The

number of flashes will correspond with the output of the boiler
e.g. 4 orange flashes = 21kW. This is normal and does not
indicate a fault condition.

1. If the CH system is shut down for remedial work requiring

either the electrical power to be switched off or the gas supply to
be turned off then any frost protection present will be inactive.

2. Switching off the boiler’s power supply or turning off the gas

supply will disable any frost protection that has been
incorporated into the control system.

7212435 - 02 (08/14) EcoBlue Heat 45

8 Operation

8.4 Use of the Control Panel

8.5 Frost Protection

See Section 4.4 Control Panel Description

1. To prevent radiators and pipework from freezing in areas
where there is a risk of frost (e.g. a garage or storage room), a
frost thermostat should be connected to the control system.

The following arrangement is recommended:­ Utilise a room frost thermostat in conjunction with a
pipe thermostat. The pipe thermostat should be located
on the primary return close to the boiler.

46 EcoBlue Heat 7212435 - 02 (08/14)

9 Settings

9.1 Parameters

Settings 9

The operating parameters for this boiler are factory set.

7212435 - 02 (08/14) EcoBlue Heat 47

10 Maintenance

10 Maintenance

10.1 General

WARNING

When changing components ensure that both the
gas and electrical supplies to the boiler are isolated
before any work is started. When the component has
been changed recommission the boiler as described
in Section 7.
The Case Front Panel MUST seal effectively against
the boiler side panels.

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.

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
by checking air inlet sample to eliminate the possibility of
recirculation. O2 20.6% & CO2< 0.2%

• The integrity of the boiler combustion circuit and relevant
seals.

• The operational gas inlet pressure and the gas rate as
described in Section 7.5.1.

• The combustion performance as described in ‘Check the
Combustion Performance’ below.

Flue Sampling

Point

Plug

Analyser Probe

Fig. 35

After refitting the sampling point
plug ensure there is no leakage
of products !

3. Competence to carry out Checking Combustion

Performance B.S. 6798 ‘Specification for Installation &
Maintenance of Gas Fired Boilers not exceeding 70kWh’ 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.

4. Check the Combustion Performance (CO/CO2ratio)

Set the boiler to operate at maximum rate as described

in Section 7.4.

5. Remove the plug from the flue sampling point (Fig. 35), insert

the analyser probe and obtain the CO/CO2ratio. This must be
less than 0.004. If the combustion reading (CO/CO2 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 ‘Standard Inspection and Maintenance’ (Section

10.2) & re-check.

• Perform ‘Setting the Gas Valve’ (Section 10.3.13) & re-check.

• Replace and set the gas valve (Sections 10.3.10 & 13) &
re-check.

48 EcoBlue Heat 7212435 - 02 (08/14)

10.2 Standard Inspection and Maintenance Operation

WARNING

Ensure that the boiler is cool.

Ensure that both the gas and electrical supplies to
the boiler are isolated. Electrical isolation can be
checked at the electrical test point.

CAUTION

During inspection and maintenance operations,
always replace all gaskets on the parts removed.

Fig. 36

Use only original spare parts that are intended for
use with this type of boiler.

When performing any inspection or maintenance
personal protective equipment must be used where
appropriate.

Maintenance 10

Fig. 37

1. Unscrew the two screws located on the lower front panel
(Fig. 36).

2. Slide the lower front panel forward and hinge down or
remove (Fig. 37).

3. Unscrew the two securing screws on the front panel. Remove
the front panel (Fig. 38).

4. Visually check for debris/damage and clean or replace if
necessary the following:

a) Check the water pressure (sealed systems)
b) Check the flue pipes and air supply pipes for leaks
c) Check and clean (if necessary) the condensate trap
d) Check the ignition electrode (replace if necessary)
e) Check the combustion

f) 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

Electrical Test
Point

Fig. 38

7212435 - 02 (08/14) EcoBlue Heat 49

10 Maintenance

10.3 Specific Maintenance Operation

Earth
Wire

Ignition
Electrode
Plug

Spark Ignition
Electrode

Earth Wire

Gasket

WARNING

When changing components ensure that both the
gas and electrical supplies to the boiler are isolated
before any work is started. When the component has
been changed recommission the boiler as described
in Section 7.
Always examine any seals or gaskets, replacing
where necessary. The Case Front Panel MUST seal
effectively against the air box side panels.

1. See section 10.2 for removal of lower front panel and front
panel.

10.3.1 Spark Ignition Electrode (Fig. 39)

1. Disengage the fan protective cover securing tab and lower
the cover.

Ta b

Fan Protective
Cover

Automatic
Air Vent

Clip

Fig. 40

Press the tap to
hinge down the
Fan Protective
Cover

2. Disconnect the ignition electrode plug from the PCB and the
earth wire from the electrode.

3. Undo the two securing screws securing and remove the
electrode and gasket.

Fig. 39

4. Fit the new electrode and if necessary replace the gasket.
Connect the electrode lead to the PCB and earth wire to the
new electrode.

10.3.2 Automatic Air Vent (Fig. 40)

1. Remove the clip securing the automatic air vent.

2. Manoeuvre the air vent out of the adaptor in the heat
exchanger.

3. Fit the new air vent and if necessary replace the ‘O’ ring .
Refit the securing clip.

10.3.3 Condensate Trap (Fig. 41)

1. Disengage the condensate trap retaining clip and disconnect
the condensate drain. Carefully pull out the trap.

2. Thoroughly clean the trap and if necessary replace the seal.

3. Fill the condensate trap with tap water to a depth of

Fig. 41

Push the Condensate Trap
Clip either side to release
the trap

Condensate Trap

50 EcoBlue Heat 7212435 - 02 (08/14)

approximately 75mm.

4. Carefully relocate the condensate trap in the boiler ensuring
all seals are located properly and reattach the retaining clip.

Maintenance 10

Removal of the fan air duct and flue outlet duct is

necessary to enable the changing of the pressure

switch, flow temperature sensor, return temperature

sensor, overheat sensor and gas valve.

Flue Clip

Fan Air
Duct

Fig. 42

10.3.4 Removal of Ducts (Fig. 42)

1. Remove the air duct by pulling the bottom of the duct forward
to disengage it from the gas valve and then sliding the top of the
duct left away from the fan.

2. Disengage the clip at the top of the flue duct, pull the duct
forwards and then manoeuvre it out of the heat exchanger
sump connection.

10.3.5 Pressure Switch (21 & 24 only) (Fig. 43)

1. Disconnect the pressure switch wiring from the overheat
sensor wiring harness.

2. Depress the retaining latch to release the pressure switch
pull to the right and remove it from the top flue duct tube.

3. Fit the new pressure switch, ensuring the ‘O’ ring is in place
on the lower spigot and reconnect to the wiring harness from
the overheat sensor.

Flue Outlet
Duct

Top Flue
Duct Tube

Fig. 43

Pressure Switch
Retaining Latch

Slide Pressure Switch away from
Top Flue Duct Tube

Disconnect from Overheat

Sensor Harness

7212435 - 02 (08/14) EcoBlue Heat 51

10 Maintenance

Flow
Temperature
Sensor

Overheat
Sensor

Fig. 44

Fan Protective Cover
removed for clarity

10.3.6 Flow Temperature Sensor (Fig. 44)

The sensor is fitted in a ‘dry’ pocket.

1. Disconnect the wiring from the flow temperature sensor.

2. Unscrew the sensor from the top of the heat exchanger.

3. Fit the new sensor and reconnect the wiring.

10.3.7 Overheat Sensor (Fig. 44)

The sensor is fitted in a ‘dry’ pocket. For ease of
access remove the Flow Temperature Sensor (10.3.6)

1. Disconnect the wiring from the overheat sensor.

2. Unscrew the sensor from the top of the heat exchanger.

3. Fit the new sensor and reconnect the wiring.

10.3.8 Return Temperature Sensor (Fig. 45)

The sensor is fitted in a ‘dry’ pocket.

Push the retaining latch
backwards to release the
Parameter Unit

Slide the Parameter
Unit upwards

Return
Temperature
Sensor

Fig. 45

1. Disconnect the wiring from the return temperature sensor.

2. Unscrew the sensor from the top of the heat exchanger.

3. Fit the new sensor and reconnect the wiring.

10.3.9 Parameter Unit (Fig. 46)

1. Push the retaining latch to release the parameter unit and
slide it upwards to remove.

2. Disconnect the wiring from the parameter unit.

3. Fit the new parameter unit and reconnect the wiring.

Fan Protective Cover
removed for clarity

Parameter
Unit

52 EcoBlue Heat 7212435 - 02 (08/14)

Fig. 46

Combustion
Control Unit

Fig. 47

Maintenance 10

10.3.10 Gas Valve (Figs. 47, 48 & 49)

After replacing the valve the CO2must be checked and

adjusted as detailed in Section 10.3.13 Setting the Gas

Valve. Only change the valve if a suitable calibrated

combustion analyser is available, operated by a

competent person - see section 10.1.3.

A T25 Torx screwdriver will be required.

1. Ensure that the gas supply to the boiler is isolated.

Remove the ducts as described in Section 10.3.4

2. Disconnect the cable from the bottom of the PCB, disengage
the fan protective cover securing tab and lower the cover.

3. Taking care not to touch the PCB components, disconnect
the electrode lead, earth lead, mains power cable and the main
sensor harness from the board. Re-engage the fan protective
cover.

Fan Gas
Supply Pipe

Electrical

Plug

Fig. 49

View from
behind
Combustion
Control Unit

Gas Valve
Securing Screws

Fan not shown for
clarity

Fig. 48

Gas Valve
Securing Screws

Gas Inlet
Pipe

4. Disconnect the plug from the gas valve and undo the nut on
the gas inlet pipe at the base of the valve.

5. Remove the combustion control unit from the boiler by
releasing the over-centre catches that secure it to the heat
exchanger (Fig. 47).

6. Remove the T25 screws securing the gas valve to the fan
assembly.

7. Lift the gas valve from its seat and pull it gently downwards
to release it from the fan assembly.

8. Remove the 2 O-Rings from the gas feed pipe and replace
with new ones supplied in the kit. Take care not to damage the
O-Rings when refitting. Apply a small quantity of the silicone
grease provided to aid reassembly of the gas valve (Fig. 49).

9. Push the new gas valve onto the gas feed pipe taking care
not to damage the O-Ring seals and push home securely.
Secure the valve using the 2 T25 screws and shakeproof
washers.

10. Reassemble all components in reverse order. When a seal
kit is provided replace the existing seals with the new ones.
Inspect all other seals before reassembly and replace if
necessary. Check all the joints are tight and wires are securely
connected.

Check gas tightness & CO2!

If the boiler will not light, prior to final setting, use a

suitable hexagon key to wind out the Throttle

Adjustment Screw until it is flush with the valve body,

then turn the screw 4 full turns clockwise. If the boiler

will not light, or the correct CO2 cannot be achieved

contact the ‘heateam’ technical helpline.

See Section 10.3.13 for CO2check.

7212435 - 02 (08/14) EcoBlue Heat 53

10 Maintenance

Burner Manifold

Control & Fan
Assembly

Fig. 50

10.3.11 Control & Fan Assembly (Figs. 50, 51 & 52)

1. Ensure that the gas supply to the boiler is isolated.

Remove the ducts as described in Section 10.3.4

An ESD wrist strap should be used when replacing
these components.

A T25 screwdriver will be required.

2. Disconnect the cable from the bottom of the PCB, disengage
the fan protective cover securing tab and lower the cover.

3. Taking care not to touch the PCB components, disconnect
the electrode lead, earth lead, mains power cable and the main
sensor harness from the board. Re-engage the fan protective
cover.

4. Disconnect the plug from the gas valve and undo the nut on
the gas inlet pipe at the base of the valve.

5. Remove the combustion control unit from the boiler by
releasing the over-centre catches that secure it to the heat
exchanger.

Gas Valve
Securing Screws

Fig. 52

View from
behind
Combustion
Control Unit

Fig. 51

Fan Gas
Supply Pipe

Gas Valve
Securing Screws

Fan not shown for
clarity

6. Remove the screws securing the gas valve. Remove
the gas valve by lifting it from its seat and pulling it downwards.

7. Using the special tool provided, remove the 4 T20 Torx
screws securing the burner manifold and set the manifold aside.

8. Fit the burner manifold to the new fan and PCB assembly
using the new seals and screws provided in the kit. Do not
overcompress the manifold gasket or use any grease.
Check visually that the gasket is correctly in place.

9. Replace the gas valve ensuring new O ring seals are
greased prior to replacing the pipe.

10. Reassemble all components in reverse order. When a seal
kit is provided replace the existing seals with the new ones.
Inspect all other seals before reassembly and replace if
necessary. Check all the joints are tight and wires are securely
connected.

10.3.12 User Interaction Controller (Fig. 53)

1. Disconnect the user interaction controller cable from the PCB
and undo the cable gland locknut.

2. Note the setting and carefully prise off the rotary temperature
selection knob.

3. Ease apart the retaining clips on the lower panel and

Fig. 53

Lower Panel

withdraw the user interaction controller and cable.

4. Reassemble in reverse order, setting the rotary knob as
previously noted.

Rotary
Knob

54 EcoBlue Heat 7212435 - 02 (08/14)

User Interaction Controller

Chimney Sweep Button

Flue Sampling

Point

Plug

Throttle

Adjustment Screw

Fig. 54

Fig. 55

Maintenance 10

10.3.13 Setting the Gas Valve (CO2Check)

The CO2must be only be checked and adjusted to set
the valve if a suitable calibrated combustion analyser is
available, operated by a competent person - see
Section 10.1.3.

If a new gas valve has been fitted it is recommended
that to assist the boiler to light prior to final setting, use
a suitable hexagon key to wind out the Throttle
Adjustment Screw (Fig. 54) until it is flush with the
valve body, then turn the screw 4 full turns clockwise. If
the boiler will not light, or the correct CO2cannot be
achieved contact the ‘heateam’ technical helpline.

1. The maximum rate CO2setting can only be reached via the
minimum rate. Press the Chimney Sweep (Fig. 55) button for
approximately 3 seconds. The status signal for the Chimney
Sweep button is orange and flashes green briefly to show that
the minimum rate is selected.

2. Press the Chimney Sweep button again once. The orange
status light for the Chimney Sweep button goes off briefly once
and maximum rate is selected.

When the boiler first lights wait a short time before
inserting the analyser probe to avoid saturation.

Analyser Probe

Offset

Adjustment Screw

(cap fitted)

Reduce CO
at min. rate

Increase CO
at min. rate

2

3. Remove the plug from the flue sampling point (Fig. 56) and

Fig. 56

insert the probe of the flue gas analyser.

4. Check the CO2is 9.3% ±0.1%. If the CO2is incorrect alter
the Throttle Adjustment Screw (Fig. 57). Turn the screw
anticlockwise to increase the CO2or clockwise to decrease
(2.5mm hexagon key).

Do not turn either adjustment screw more than 1/8 of a
turn at a time. Allow the analyser reading to settle

Throttle

Adjustment Screw

(cover removed)

before any further adjustment.

5. Press the Chimney Sweep button twice to select the
minimum rate. The orange status light for the Chimney Sweep
button flashes green briefly and minimum rate is selected.

6. Check the CO2is 8.9% ±0.1%. If the CO2is incorrect alter
the Offset Adjustment Screw (Fig. 57). Turn the screw clockwise

Reduce CO
at max. rate

2

to increase the CO2or anticlockwise to decrease (4mm
hexagon key).

Re-check both the maximum and minimum values if

2

Gas Valve

Increase CO
at max. rate

2

any adjustment has been made. THERE MUST
ALWAYS BE A DIFFERENCE OF 0.4% BETWEEN
MAXIMUM & MINIMUM CO2READINGS !

Fig. 57

7. Check the Combustion Performance (CO/CO2ratio). This
must be less than 0.004.

8. Briefly press the RESET button to return the boiler to normal
operating status and remove the analyser probe.

Refit the sampling point plug & ensure there is no
leakage of products !

7212435 - 02 (08/14) EcoBlue Heat 55

11 Troubleshooting

11 Troubleshooting

11.1 Error Codes

Operation status and error codes are displayed on the “chimney
sweep” button (3) on the control panel. In normal operation this
button is illuminated and goes off for a time once periodically.

When normal operation is interrupted for some reason this
button will turn off and flash on a number of times periodically.
The colour and number of flashes displayed is dependent on
the boiler status or fault condition.

The orange LEDs will flash at EVERY heating demand.
The number of flashes will correspond with the output
of the boiler as shown in the table. e.g. 4 orange flashes
= 21kW. This is normal and does not indicate a fault
condition.

“Error” or auto reset conditions (Green flashes on
“chimney sweep”)

The following table describes the conditions that may result in a
blocking signal being displayed.

Status
signal
1 flash
green

2 flashes
green

3 flashes
green

4 flashes
green

5 flashes
green

6 flashes
green

The boiler will try to re-start several times, and normal operation
will resume once the blocking condition has been eliminated.

Should the conditions persist the boiler may go into lock-out
(see following section)

Description Remedial actions by service

engineer

Temperature
protection

Shutdown input

Flame loss

Communication
fault

Parameter fault

Miscellaneous

• Maximum flow temperature

exceeded,

•Flow temperature rise rate too

high,

• Excessive difference between
flow and return temperature

•BL terminals on User Interaction
Controller are open circuit

•No flame detected during
operation

•Bad connection or wiring fault

• Internal communication fault

• Parameter error or faulty PU

• Configuration error or PCB fault

• Internal fault in combustion
control unit

•Check system circulation &
pump operation

•Check demands for boiler
operation (switched live operation)

•Check temperature setting

•Check temperature sensors in boiler

• If condensate pump is wired
to these terminals check
operation of condensate pump

•Check wiring to BL terminals
(link present or connections to
external device correct)

•Check gas supply is turned on
and gas is available if on a
pre-payment meter

•Check flue condition

•Check wiring/connections
between boiler and User Interaction
Controller and within the box

• If necessary replace control/fan assy

•Replace PU and recommission

•Replace control/fan assy

•Replace combustion control unit

56 EcoBlue Heat 7212435 - 02 (08/14)

Troubleshooting 11

Lock-out conditions (Red flashes on “chimney sweep”)

The following table describes the conditions that may result in a
lock-out condition and red flashing signal being displayed.

To reset a lock-out condition press and hold the reset button
until the fault indication flashes rapidly and goes out.

NOTE: a lock-out condition can be re-set up to 5 times within
one hour using the reset button. Any repeating fault should be
fully investigated and appropriate remedial actions taken by a
Gas Safe registered service engineer.

Status
signal
1 flash
red

2 flashes
red

3 flashes
red

4 flashes
red

5 flashes
red

6 flashes
red

Description Possible causes

Sensor error

•Bad connection to flow or
return temperature sensor

•Fault with flow or return
temperature sensor(s)

•Low or no flow through boiler

• Reverse flow through boiler

High
temperature
protection

• Over-temperature thermostat on
heat exchanger activated

•No water flow through heat
exchanger

• Over-temperature thermostat
fault or bad connection (open
circuit).

•PCB over-temperature condition

•Flue fault resulting in
recirculation or activation of air
pressure switch (if fitted)

Ignition fault

•No ignition

•No flame detected following
ignition

•False flame signal detected

• Repeated loss of flame detected

Fan fault

•Fan calibration error

•Fan failure

Parameter fault

•Bad connection to PU

• Parameter error or faulty PU

Miscellaneous

•Bad connection or wiring fault
internal or external to the boiler

• Parameter error

• Communication error

Remedial actions by service
engineer

•Check connections to
temperature sensors/PCB and
condition of wiring loom

•Check resistance

of

temperature sensors

•Check pump operation and
system circulation

•Check connections to and
operation of O/T thermostat
and air pressure switch (if
fitted) and PCB and condition
of wiring loom

•Check system pressure or that
system is not air-locked

•Check pump operation and
system circulation

•Check flue condition

•Check earthing of the appliance

•Check ignition electrode
condition and clean/replace if
necessary

•Check gas valve operation

•Check flue condition

•Check correct

combustion/gas

valve settings

•Check condensate drain for
blockage

• If fan operates, check flue
installation and condition.

•Replace control/fan assy

•

PCB and condition of wiring
loom

•Replace PU and recommission

•Check all wiring connections

correctly made

are

• Using a service tool or Recom
software check all parameter
settings

• If necessary replace PU
and/or control/fan assy

7212435 - 02 (08/14) EcoBlue Heat 57

12 Decommissioning

12 Decommissioning

12.1 Decommissioning Procedure

1. Disconnect the gas & electric supplies and isolate them.

2. Drain the primary circuit and disconnect the filling device.

3 . Dismantle the chimney system and remove the boiler from the
wall mounting frame.

58 EcoBlue Heat 7212435 - 02 (08/14)

13 Spare Parts

Spare Parts 13

13.1 General

A

B

1. If, following the annual inspection or maintenance any part of
the boiler is found to need replacing, use Baxi Spare Parts only.

13.2 Spare Parts List

D

C

E

Key Description Manufacturer’s
No. Part No.

A Parameter Unit 7216298

B Sensor Kit 7216301

C Automatic Air Vent 7216300

D Ignition/Sensing Electrode 7216299

E Pressure Switch 7212522

F Combustion Control Unit 7216292

G User Interaction Controller 7600498

H Gas Valve 7618108

I Control & Fan Assembly 7618106

F

G

H

I

7212435 - 02 (08/14) EcoBlue Heat 59

Notes 14

60 EcoBlue Heat 7212435 - 02 (08/14)

Notes 14

7212435 - 02 (08/14) EcoBlue Heat 61

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

Competent Persons Scheme. A Building Regulations Compliance

will then be issued to the customer.

www.centralheating.co.uk

© Heating and Hotwater Industry Council (HHIC)

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.

GAS BOILER SYSTEM COMMISSIONING CHECKLIST

Customer name: Telephone number:

Address:

Boiler make and model:

Boiler serial number:

Commissioned by (PRINT NAME): Gas Safe register number:

Company name: Telephone number:

Company address:

Commissioning date:

CONTROLS (tick the appropriate boxes)

Time and temperature control to heating

Room thermostat and programmer/timer Programmable room thermostat

Load/weather compensation Optimum start control

Time and temperature control to hot water Cylinder thermostat and programmer/timer Combination Boiler

Heating zone valves Fitted Not required

Hot water zone valves Fitted Not required

Thermostatic radiator valves Fitted Not required

Automatic bypass to system Fitted Not required

Boiler interlock Provided

ALL SYSTEMS

’s instructions Yes

What system cleaner was used?

What inhibitor was used? Quantity litres

Yes No

CENTRAL HEATING MODE measure and record:

Gas rate m³/hr OR ft³/hr

Burner operating pressure (if applicable) mbar OR Gas inlet pressure mbar

°C

Central heating return temperature °C

COMBINATION BOILERS ONLY

Is the installation in a hard water area (above 200ppm)? Yes No

Yes No

DOMESTIC HOT WATER MODE Measure and Record:

Gas rate m³/hr OR ft³/hr

Burner operating pressure (at maximum rate) mbar OR Gas inlet pressure at maximum rate mbar

Cold water inlet temperature °C

Hot water has been checked at all outlets Yes Temperature °C

I/min

CONDENSING BOILERS ONLY

The condensate drain has been installed in accordance with the manufacturer’s instructions and/or BS5546/BS6798 Yes

ALL INSTALLATIONS

Record the following:

At max. rate: CO ppm AND CO/CO

²

Ratio

At min. rate: (where possible) CO ppm AND CO/CO

²

Ratio

The heating and hot water system complies with

the appropriate Building Regulations Yes

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

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

The manufacturer’s literature, including Benchmark Checklist and

Service Record, has been explained and left with the customer Yes

Commissioning Engineer’s Signature

Customer’s Signature

www.centralheating.co.uk

62

www.centralheating.co.uk

It is recommended that your heating system is serviced regularly and that the appropriate Service Interval Record is completed.

Service Provider

Before completing the appropriate Service Record below, please ensure you have carried out the service as described in the manufacturer’s instructions.

SERVICE RECORD

SERVICE 01

Date:

Engineer name:

Company name:

Telephone No:

Gas safe register No:

Record:

At max. rate: CO ppm AND CO² %

At min. rate:

(Where Possible) CO ppm AND CO

²

%

Comments:

Signature

SERVICE 02

Date:

Engineer name:

Company name:

Telephone No:

Gas safe register No:

Record:

At max. rate: CO ppm AND CO² %

At min. rate:

(Where Possible) CO ppm AND CO

²

%

Comments:

Signature

SERVICE 03

Date:

Engineer name:

Company name:

Telephone No:

Gas safe register No:

Record:

At max. rate: CO ppm AND CO² %

At min. rate:

(Where Possible) CO ppm AND CO

²

%

Comments:

Signature

SERVICE 04

Date:

Engineer name:

Company name:

Telephone No:

Gas safe register No:

Record:

At max. rate: CO ppm AND CO² %

At min. rate:

(Where Possible) CO ppm AND CO

²

%

Comments:

Signature

SERVICE 05

Date:

Engineer name:

Company name:

Telephone No:

Gas safe register No:

Record:

At max. rate: CO ppm AND CO² %

At min. rate:

(Where Possible) CO ppm AND CO

²

%

Comments:

Signature

SERVICE 06

Date:

Engineer name:

Company name:

Telephone No:

Gas safe register No:

Record:

At max. rate: CO ppm AND CO² %

At min. rate:

(Where Possible) CO ppm AND CO

²

%

Comments:

Signature

SERVICE 07

Date:

Engineer name:

Company name:

Telephone No:

Gas safe register No:

Record:

At max. rate: CO ppm AND CO² %

At min. rate:

(Where Possible) CO ppm AND CO

²

%

Comments:

Signature

SERVICE 08

Date:

Engineer name:

Company name:

Telephone No:

Gas safe register No:

Record:

At max. rate: CO ppm AND CO² %

At min. rate:

(Where Possible) CO ppm AND CO

²

%

Comments:

Signature

SERVICE 09

Date:

Engineer name:

Company name:

Telephone No:

Gas safe register No:

Record:

At max. rate: CO ppm AND CO² %

At min. rate:

(Where Possible) CO ppm AND CO

²

%

Comments:

Signature

SERVICE 10

Date:

Engineer name:

Company name:

Telephone No:

Gas safe register No:

Record:

At max. rate: CO ppm AND CO² %

At min. rate:

(Where Possible) CO ppm AND CO

²

%

Comments:

Signature

*All installations in England and Wales must be

to Local Authority Building Control (LABC) either directly or through a

Competent Persons Scheme. A Building Regulations Compliance

will then be issued to the customer.

© Heating and Hotwater Industry Council (HHIC)

63

All descriptions and illustrations provided in this leaflet have been

carefully prepared but we reserve the right to make changes and

improvements in our products which may affect the accuracy of the

information contained in this leaflet. All goods are sold subject to our

standard Conditions of Sale which are available on request.

BAXI

A 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

7212435 - 02 (08/14)