Baxi MainEco Heat 15 Manual

Installation and Service Manual
Gas Fired Wall Mounted Powered Flue Condensing Boiler
en
United Kingdom
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.
M
MainEco Heat
15 - 18 - 24

2 MainEco Heat 7215845 - 01 (08/14)
1 Introduction
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.
0086
ISO 9001
FM 00866
The Benchmark Scheme
Benchmark places responsibilities on both manufacturers and installers.
The purpose is to ensure that customers are provided with the correct
equipment for their needs, that it is installed, commissioned and
serviced in accordance with the manufacturer’s instructions by
competent persons and that it meets the requirements of the
appropriate Building Regulations. The Benchmark Checklist can be
used to demonstrate compliance with Building Regulations and should
be provided to the customer for future reference.
Installers are required to carry out installation, commissioning and
servicing work in accordance with the Benchmark Code of Practice
which is available from the Heating and Hotwater Industry Council who
manage and promote the Scheme. Visit www.centralheating.co.uk for
more information.
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.
Model Range
Baxi MainEco Heat 15
G.C.No 41-470-15
Baxi MainEco Heat 18
G.C.No 41-470-16
Baxi MainEco Heat 24
G.C.No 41-470-17

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Installer Notification Guidelines
Choose Building
Regulations Notification
Route
Contact your relevant Local
Authority Building Control
(LABC) who will arrange
an inspection or contact
a government approved
inspector
LABC will record the data
and will issue a
certificate of compliance
‘Gas Safe Register’ will issue a
Building Regulations Compliance
Certificate to the property owner
and inform the relevant LABC
You must ensure that the
certificate number issued by
the ‘Gas Safe Register’ is written
onto the Benchmark Checklist
Scheme Members only
Call ‘Gas Safe Register’ on:
0800 408 5577
or log onto:
www.gassaferegister.co.uk
within 10 days
If you notify via the ‘Gas Safe
Register’, the register will issue
the Building Regulations
certificate on members’ behalf
Complete the
Benchmark Checklist
Install and Commission this
appliance to manufacturer's
instructions
Competent Person's
Self Certification Scheme
Building Control
Complete the
Benchmark Checklist
Install and Commission this
appliance to manufacturer's
instructions
Installer Notification Guidelines

4 MainEco Heat
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
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
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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
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
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6 MainEco Heat
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 (CO2Check)
11 Troubleshooting
11.1 Error Codes - Auto Reset
11.2 Lockout Condition
12 Decommissioning Procedure
12.1 Decommissioning Procedure
13 Spare Parts
13.1 General
13.2 Spare Parts List
14 Notes
Benchmark Commissioning Checklist
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7215845 - 01 (08/14) MainEco Heat 7
Introduction 1
1 Introduction
1.1 General
WARNING
Installation, repair and maintenance must only be
carried out only by a competent person. This
document is intended for use by competent persons,
WARNING
Check the information on the data plate is
compatible with local supply conditions.
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.

8 MainEco Heat
1 Introduction
7215845 - 01 (08/14)
1.3 Symbols Used
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
PU: Parameter Unit
PCB: Printed Circuit Board
DANGER
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.
1.4 Abbreviations
1.2 Additional Documentation
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

7215845 - 01 (08/14) MainEco Heat 9
Introduction 1
1.5 Extent of Liabilities
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.

10 MainEco Heat
1 Introduction
7215845 - 01 (08/14)
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 MainEco 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 No3083” and is deemed to
meet the requirements of Directive 92/42/EEC on the energy
efficiency requirements for new hot water boilers fired with liquid
or gaseous fuels:-
Type test for purpose of Regulation 5 certified by:
Notified Body 0063.
Product/Production certified by:
Notified Body 0086.
For GB/IE only.