Baxi COMBI 228 User manual

Please keep these instructions in a safe place.
If you move house, please hand them over to the next occupier.
United Kingdom
en
User Guide
High-efficiency wall-hung condensing gas boiler
224 Combi 2 - 228 Combi 2
224 Combi LPG 2

Dear Customer,
Thank you very much for buying this appliance.
Please read through the manual carefully before using the product, and keep it in a safe place for later reference. In order to
ensure continued safe and efficient operation we recommend that the product is serviced regularly. Our service and customer
service organisation can assist with this.
We hope you enjoy years of problem-free operation with the product.

Contents
1 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1 General safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.2 Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.3 Liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.3.1 User's liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
1.3.2 Installer's liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.3.3 Manufacturer's liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2 About this manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.3 Symbols used . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.3.1 Symbols used in the manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3 Technical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.1 Homologations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.1.1 Certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
3.2 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
4 Description of the product . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
4.1 General description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
4.2 Operating principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.2.1 Air-gas adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
4.2.2 Combustion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.2.3 Heating and domestic hot water production . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.3 Control panel description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.3.1 Description of the keys and knobs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
4.4 Accessories & options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
5 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
5.1 Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.1.1 Procedure for first start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
5.1.2 Changing the heating flow temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
5.1.3 Changing the domestic hot water (DHW) temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.2 Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.2.1 Switching off the heating and domestic water (DHW) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.3 Frost protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6 Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
6.1 Access to USER parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
7 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
7.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
7.2 Maintenance instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
7.3 Maintenance message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
7.2.1 Filling the installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
7.2.2 Venting the installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
8 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
8.1 Temporary and permanent faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
8.2 Error codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Contents
200 Combi 2 3
1.2.1 The Benchmark scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
1.2.2 Benchmark commissioning checklist. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.2 Additional documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.4 Abbreviations/glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.2.1 Technical information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
3.2.2 Dimensions and connections/clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
6.2 List of USER parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
8.3 Fault finding. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

10 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
10.1 Disposal and recycling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
11 Environmental . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
11.1 Energy saving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
12 Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
12.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
9 Decommissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
9.1 Decommissioning procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Contents
12.2 Standard warranty terms and conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
11.2 Room thermostats and settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
13 Appendix. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
13.1 Product fiche - Combination boilers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
13.2 Package fiche - boilers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
13.3 Package fiche - Combination heaters (boilers or heat pumps) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
4 200 Combi 2

1 Safety
1.1 General safety instructions
Danger
This boiler can be used by children aged 8 years and above and
by persons with reduced physical, sensory or mental capabilities
or lack of experience and knowledge when they have been given
supervision or instruction concerning the safe use of the device
and understand the resulting risks. Children must not be allowed
to play with the appliance. Cleaning and user maintenance must
not be carried out by children without supervision.
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.
Important
If a water or gas leak occurs or is suspected, the boiler can be
isolated at the inlet valves by turning their taps through 90° (1/4
turn) downwards.
A ON
B OFF
For advice please contact your Installer, Annual Service Provider
or Baxi Customer Support - The Service Division of Baxi. You can
contact Baxi Customer Support on telephone number 0344 871
1545.
When contacting Baxi Customer Support it will be useful to have
the "Benchmark Checklist " at the back of the Installation &
Service Manual to hand as it includes details relevant to the boiler
and installation.
Warning
Do not touch flue/chimney pipes. Depending on the settings of the
appliance, the temperature of flue/chimney pipes may exceed 60
°C.
Do not touch radiators for long periods. Depending on the settings
of the appliance, the temperature of radiators may reach 85 °C.
Take precautions with domestic hot water. Depending on the
settings of the appliance, domestic hot water temperature may
reach 65 °C.
Caution
Do not neglect to service the appliance. Contact a qualified
professional or take out a maintenance contract for the annual
servicing of the appliance.
Fig.1 Taps ON and OFF
PN-0000367
A
B
1 Safety
200 Combi 2 5

1 Safety
1.2 Recommendations
Caution
Only qualified professionals are authorised to work on the boiler
and the installation.
The appliance has an integral frost protection mode as long as
there is power to the boiler.
Important
Regularly check the water pressure in the system
(recommended pressure is 1.5 bar).
Keep the appliance accessible at all times.
Do not remove or cover the user information and serial number
labels affixed to the boiler control flap. They must remain legible
throughout the lifetime of the boiler.
1.2.1 The Benchmark Scheme
Baxi Heating UK Ltd is a licensed member of the Benchmark Scheme
which aims to improve the standards of installation and commissioning of
domestic heating and hot water systems in the UK and to encourage
regular servicing to optimise safety, efficiency and performance.
Benchmark is managed and promoted by Heating and Hotwater Industry
Council. For more information visit www.centralheating.co.uk
1.2.2 Benchmark Commissioning Checklist
Please ensure that the installer has fully completed the Benchmark
Checklist on the inside back pages of the installation instructions supplied
with the product and that you have signed it to say that you have received
a full and clear explanation of its operation. The installer is legally required
to complete a commissioning checklist as a means of complying with the
appropriate Building Regulations (England and Wales).
All installations must be notified, by the installer, to Local Area Building
Control either directly or through a Competent Persons Scheme. A
Building Regulations Compliance Certificate will then be issued to the
customer who should, on receipt, write the Notification Number on the
Benchmark Checklist.
This product should be serviced annually to optimise its safety, efficiency
and performance. The service engineer should complete the relevant
section of the Benchmark Service Record in the Installation & Service
manual after each service.
The completed Benchmark Checklist & proof of annual servicing (where
applicable) will be required in the event of any warranty work.
6 200 Combi 2

Our products are manufactured in compliance with the requirements of the
various Directives applicable. They are therefore delivered with the
marking and any documents necessary. In the interests of the quality of
our products, we strive constantly to improve them. We therefore reserve
the right to modify the specifications given in this document.
Our liability as manufacturer may not be invoked in the following cases:
1.3 Liabilities
1.3.1 User's liability
To guarantee optimum operation of the system, you must abide by the
following instructions:
Read and follow the instructions given in the manuals provided with the
appliance.
Call on a qualified professional to carry out installation and initial
commissioning.
Get your installer to explain your installation to you.
Have the required inspections and maintenance carried out by a
qualified installer.
Keep the instruction manuals in good condition close to the appliance.
1.3.2 Installer's liability
The installer is responsible for the installation and initial commissioning of
the appliance. The installer must observe the following instructions:
Read and follow the instructions given in the manuals provided with the
appliance.
Install the appliance in compliance with prevailing legislation and
standards.
Carry out initial commissioning and any checks necessary.
Explain the installation to the user.
If maintenance is necessary, warn the user of the obligation to check the
appliance and keep it in good working order.
Give all the instruction manuals to the user.
1.3.3 Manufacturer's liability
Failure to abide by the instructions on installing and maintaining the
appliance.
Failure to abide by the instructions on using the appliance.
Faulty or insufficient maintenance of the appliance.
1 Safety
200 Combi 2 7

2 About this manual
2 About this manual
2.1 General
2.3 Symbols used
2.3.1 Symbols used in the manual
This manual uses various danger levels to draw attention to special
instructions. We do this to improve user safety, to prevent problems and to
guarantee correct operation of the appliance.
Danger
Risk of dangerous situations that may result in serious personal
injury.
Danger of electric shock
Risk of electric shock.
Warning
Risk of dangerous situations that may result in minor personal
injury.
Caution
Risk of material damage.
Important
Please note: important information.
See
Reference to other manuals or pages in this manual.
Warning
Installation, repair and maintenance must only be carried out only
by a competent person.
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 manual is intended for the user of the Baxi 200 Combi 2 boiler. 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.
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.
2.2 Additional documentation
Various timers, external controls, etc. are available as optional extras. Full
details are contained in the relevant sales literature.
2.4 Abbreviations/glossary
CH Central heating
DHW
PCU
Pnc
SU
Domestic hot water
PCB for managing burner operation
Condensing output
Safety PCB
8 200 Combi 2

3 Technical specifications
3.1 Homologations
3.1.1 Certification
3.2 Technical data
3 Technical specifications
Tab.1 Certifications
UKCA certificate number 748363
NOx class 6
Boiler type C13, C33
Tab.2 Technical settings for combination heaters with boilers
3.2.1 Technical information
Important
All data in these sections are nominal and subject to normal pro
duction tolerances.
200 Combi 2 9
Baxi - Combi (C) 224 228 224 LPG
Condensing boiler Yes Yes Yes
Low-temperature boiler(1) No No No
B1 boiler No No No
Cogeneration space heater No No No
Combination heater Yes Yes Yes
Rated heat output
Prated
kW 20 20 20
Useful heat output at rated heat output and
high temperature setting (2)
P4
kW 20 20 20
Useful heat output at 30% of rated heat out
put and low temperature setting(1)
P1
kW 6.7 6.7 6.7
Seasonal space heating energy efficiency
ƞs
%93 93 93
Useful efficiency at rated heat output and high
temperature setting(2)
ƞ4
%88.2 88 88.2
Useful efficiency at 30% of rated heat output
and low temperature setting(1)
ƞ1
%97.9 97.8 97.9
Auxiliary electricity consumption
Full load
elmax
kW 0.037 0.026 0.037
Partial load
elmin
kW 0.014 0.014 0.014
Standby mode
PSB
kW 0.004 0.004 0.004
Other items
Heat loss on standby
Pstby
kW 0.04 0.04 0.04
Ignition burner power consumption
Pign
kW - - -
Annual energy consumption
QHE
GJ 62 62 62
Sound power level, indoors
LWA
dB 50 49 50
Nitrogen oxide emissions NOx mg/kWh 23 21 23
Domestic hot water parameters
Declared load profile XL XL XL
Daily electricity consumption
Qelec
kWh 0.176 0.185 0.176
Annual electricity consumption
AEC
kWh 39 41 39
Water heating energy efficiency
ƞwh
%88 85 88
Daily fuel consumption
Qfuel
kWh 22.03 22.72 22.03
Annual fuel consumption
AFC
GJ 17 17 17
(1) Low temperature means for condensing boilers 30°C, for low temperature boilers 37°C and for other heaters 50°C return temperature (at heater inlet).
(2) High temperature setting means 60 °C return temperature at boiler inlet and 80 °C flow temperature at boiler outlet
Gas Council numbers 47-077-48 47-077-49 47-077-50

Tab.3 General
3 Technical specifications
10 200 Combi 2
224 228 224 LPG
kW 24.7 28.9 24.7
kW - – -
kW 20.6 20.6 20.6
kW 4.9 6.0 4.9
kW 24 28.0 24
kW - – -
kW 20 20 20
kW 21.8 21.8 21.8
kW 4.8 5.8 4.8
kW 5.2 6.3 5.2
%105.8 105.8 105.8
Rated heat input (Qn) for domestic hot water
Rated heat input (Qn) with domestic hot water tank
Rated heat input (Qn) for heating
Reduced heat input (Qn) 80/60 °C
Rated heat output (Pn) for domestic hot water
Rated heat output (Pn) with domestic hot water tank
Rated heat output (Pn) 80/60 °C for heating
Rated heat output (Pn) 50/30 °C for heating
Reduced heat output (Pn) 80/60 °C
Reduced heat output (Pn) 50/30 °C
Rated efficiency 50/30 °C (Hi)
224 228 224 LPG
bar 2.5 2.5 2.5
bar 0.5 0.5 0.5
°C 25 - 80 25 - 80 25 - 80
l7 7 7
224 228 224 LPG
bar 0.8 0.8 0.8
bar 8.0 8.0 8
bar 0.15 0.15 0.15
l/min 2.0 2.0 2
l/min 11.5 13.4 11.5
°C 35 - 60 35 - 60 35 - 60
l/min 13.8 16.0 13.8
l/min 9.8 11.4 9.8
224 228 224 LPG
m3/h 2.61 3.06 2.61
m3/h – – –
m3/h 0.52 0.63 0.52
kg/h 1.92
kg/h 0.38
mm 80/80 80/80 80/80
mm 60/100 60/100 60/100
kg/sec 0.011 0.013 0.011
kg/sec – – –
kg/sec 0.002 0.003 0.002
224 228 224 LPG
V230 230 230
Hz 50 50 50
W90 85 90
W – – –
Power supply voltage
Power supply frequency
Rated electric power
Rated electrical output with domestic hot water tank
Flue gas mass flow rate (max)
Flue gas mass flow rate (max) with domestic hot water tank
Flue gas mass flow rate (min)
Tab.10 Electrical characteristics
G20 gas consumption (Qmin)
G31 propane gas consumption (Qmin)
Diameter of separate discharge pipes
Diameter of coaxial discharge pipes
Domestic water production with ΔT = 35 °C
Tab.9 Combustion characteristics
G20 gas consumption (Qmax)
G20 gas consumption (Qmax) with domestic hot water tank
Minimum water flow
Specific flow (D)
Temperature range for domestic water circuit
Domestic water production with ΔT = 25 °C
G31 propane gas consumption (Qmax)
Tab.8 Characteristics of the domestic water circuit
Minimum pressure
Maximum pressure
Minimum dynamic pressure
Maximum pressure
Minimum pressure
Temperature range for heating circuit
Water capacity of expansion vessel
Tab.7 Characteristics of the heating circuit
–
–
–
–

Fig.2 Dimensions and connections
700 mm
285 mm
395 mm
2
54
BO-0000199-1
1
37
6
1
2
3
Safety valve
Heating circuit flow fitting (G3/4”)
Fitting for condensate discharge
4
5
6
7
DHW (Domestic Hot Water) outlet fitting (G1/2”)
Gas inlet fitting (G3/4”)
Domestic cold water inlet fitting (G1/2”)
Heating circuit return fitting (G34")
3 Technical specifications
3.2.2 Dimensions and connections/clearances
200 Combi 2 11
224 228 224 LPG
IP X5D X5D X5D
kg 26.5/28.5 27.5/29.5 26.5/28.5
mm 700/395/285 700/395/285 700/395/285
Humidity protection rating (EN 60529)
Net weight when empty/filled with water
Dimensions (height/width/depth)
Tab.11 Other characteristics

4 Description of the product
4.1 General description
The purpose of this gas-fuelled condensing boiler is to heat water to a
temperature that is lower than boiling point at atmospheric pressure. It
must be connected to a heating installation and to a domestic hot water
distribution system that is compatible with its power and performance
ratings. Features of this boiler:
Low pollutant emissions,
High-efficiency heating,
Front control panel with display,
Lightweight and compact.
4.2 Operating principle
4.2.1 Air-gas adjustment
The air is drawn in by the fan and gas injected directly at the height of the
venturi. The fan revolution speed is regulated automatically by the
electronic board based on the adjustment settings. The gas and air are
mixed in the manifold. The gas/air ratio ensures that the quantity of gas
and air are adjusted correctly to always obtain optimal combustion. The
gas/air mixture is fed into the burner at the front of the exchanger.
Here, the electric igniter triggers the mixture with a series of sparks that
burn, producing thermal energy.
4.2.2 Combustion
The burner heats the heating water circulating in the heat exchanger.
When the temperature of the combustion gas is lower than the dew point
(around 55 °C), the water vapour contained in the combustion gas
condenses in the flue gas side of the heat exchanger. The heat recovered
during this condensation process (the latent heat or condensing heat) is
also transferred to the heating water. Once cooled, the combustion gases
are discharged through the exhaust pipe. The condensed water is
discharged through a siphon.
4.2.3 Heating and domestic hot water production
In boilers used for heating and for producing domestic hot water, an
integrated plate heat exchanger heats the domestic water. The heated
water is then channelled to the heating installation or to the plate heat
exchanger via a three-way valve. A flow sensor detects that a hot water
tap has been turned on and communicates this to the PCB, which
switches the three-way valve to the hot water position and activates the
pump. The three-way valve is spring-loaded and only consumes electricity
when switching from one position to another. Precedence is given to a
heat request in domestic water mode.
4 Description of the product
12 200 Combi 2

4.3 Control panel description
4 Description of the product
4.3.1 Description of the control panel
Fig.4 Display screen
4.4 Accessories & options
Consult the sales catalogue for all available accessories and options.
Knobs
HEATING: Using this knob you can modify the flow
temperature for the heating installation (heating
setpoint 25-80 °C).
turn the knob anti-clockwise to reduce the temperature
or to the left to scroll through the menus. With an outside
sensor connected it is possible to limit the setpoint value;
turn the knob clockwise to increase the temperature or to
the right to scroll through the menus.
DOMESTIC HOT WATER: Using this knob you can
modify the domestic hot water temperature (DHW setpoint
35-60 °C) or scroll through the menus to the left and right:
turn anti-clockwise to reduce the temperature.
turn clockwise to increase the temperature.
Fig.3 Control panel
1Chimney sweep mode:
Press the Back and Manual reset keys simultaneously.
Chimney sweep mode is enabled (forced full load or low
load for CO2 measurement).
The burner is on.
Display of the system water pressure.
DHW operation is enabled.
CH operation is enabled.
Information menu: read out various current values.
User menu: user-level parameters can be configured.
Installer menu: installer-level parameter can be configured.
Error menu: errors can be read out.
Counter menu: various counters can be read out.
Icons
Back (previous menu)
Manual reset
Menu
Confirms selection or value.
Buttons
200 Combi 2 13

5 Operation
5.1 Start-up
5 Operation
5.1.1 Procedure for first start-up
The following information appears on the display when the boiler is
electrically powered:
1. The message "INIT"" appears, indicating that the "Initialisation" phase
is active (a few seconds);
2. The software version "Vxx.xx." appears (two seconds);
3. The software version for boiler settings "Pxx.xx." appears (two
seconds);
4. The boiler and heating installation venting phase has started. During
operation, the display shows in alternate mode "– – – – – – – –", the
word “DEAIR” and the pressure value for the heating circuit. This
phase lasts 6 minutes and 20 seconds, at the end the boiler is ready
for operation;
5. The symbol and the "x.x" installation water pressure value
appear.
In the event of a power outage the procedure will be repeated from the
beginning.
To activate a heating request, the room thermostat must be set to a
temperature above the current temperature (or open a domestic water
tap.)
5.1.2 Changing the heating flow temperature
1. Use the knob to adjust the flow temperature in heating mode.
Turn the knob anti-clockwise to reduce the temperature value. Turn
the knob clockwise to increase the temperature value.
Important
With an outside sensor connected it is possible to lower the
setpoint value.
2. Press the key to confirm the value or wait a few seconds until the
value is automatically saved.
Important
The flow temperature on the display automatically matches the
temperature set when using a:
Weather-dependent regulator.
OpenTherm regulator.
Fig.5 Scrolling through the menus and/or
settings
5.1.3 Changing the domestic hot water (DHW) temperature
1. Use the knob to adjust the domestic hot water temperature.
Turn the knob anti-clockwise to reduce the temperature value.
Turn the knob clockwise to increase the temperature value.
2. Press the key to confirm the value or wait a few seconds until the
value is automatically saved.
Fig.6 Scrolling through the menus and/or
settings
14 200 Combi 2

5 Operation
5.2 Shutdown
5.2.1 Switching off the heating and domestic hot water (DHW)
Heating mode can also be disabled by turning the
until the word OFF appears on the display.
Important
When heating mode is re-enabled check, by turning the knob, that
the comfort temperature is that requested.
Important
Heating is disabled but the frost protection function remains
activated.
Domestic hot water mode can also be disabled by turning the
knob anti-clockwise until the word OFF appears on the display.
To switch the boiler off completely, switch off the power supply to the
appliance and close the gas cock.
Important
In this condition, the boiler and the heating installation are not
protected against frost.
knob anti-clockwise
5.3 Frost protection
It is a good idea to prevent the heating installation from draining
completely, as changing the water can result in unnecessary and
damaging limescale deposits from forming inside the boiler and heating
elements. If the thermal installation is not intended to be used during the
winter months and there is a risk of frost, we recommend mixing suitable
antifreeze solutions designed for a specific purpose (e.g. propylene glycol,
which contains limescale and corrosion inhibitors) into the water in the
installation. The boiler's electronic control system is equipped with an
"antifreeze" function for the heating system. This function activates the
boiler pump when the heating system flow temperature falls below 7 °C. If
the water temperature reaches 4 °C, the burner is switched on, bringing
the system water to a temperature of 10 °C. When this value is reached
the burner switches off and the pump continues to operate for another 3
minutes.
Important
The frost protection function will not work if there is no power
being supplied to the boiler or if the gas supply cock is closed.
200 Combi 2 15

6 Settings
6 Settings
6.1 Access to USER parameters
To display/modify the list of USER parameters, proceed as follows:
on the menu
press the + keys simultaneously, the symbol
bar starts to flash;
turn the
turn the
knob until the appears. Press the key to confirm;
knob until you reach the required setting. Press the key
knob;
to confirm;
modify the value of the parameter using
the Press the key to confirm;
Press the key to exit.
Important
The factory settings for certain settings may differ based on the
market the product is destined for.
6.2 List of USER parameters
Tab.9 Table of parameters
Name Description Factory
value
Mini
mum
Maxi
mum Level
AP016
CH operation
0: Off
1: On
1 – – User
AP017
Domestic hot water (DHW)
0: Off
1: On
1 – – User
AP073 Average external temperature [°C] when switching from summer/
winter mode (with outside sensor) 22 10 30 User
AP074
Force summer mode (with outside sensor)
0: Auto according to AP073
1: Summer
0 – – User
DP004
Anti-legionella function
0: Disabled
1: Weekly
2: Daily (only available with Room Unit)
0 – – User
DP070
Domestic hot water temperature setpoint.
In the case of operation with a calorifier tank and programming via
room unit corresponding to the comfort setpoint [°C]
60 35 60 User
DP200
DHW mode:
0: Domestic hot water programming (only available with Room Unit)
1: Manual (boiler with calorifier tank) – Preheating active (instanta
neous boiler)
2: Antifreeze (boiler with calorifier tank) – No preheating (instantane
ous boiler)
2 – – User
Fig.7 Accessing the user parameters
16 200 Combi 2

6 Settings
Tab.10 Settings table with eMO Life
Name Description Factory
value
Mini
mum
Maxi
mum Level
CP060 Required ambient temperature (°C) in the zone in the holiday/anti
freeze period 6 5 20 User
CP070
Maximum ambient setpoint temperature (°C) in reduced mode that
enables switching to comfort mode with climate control (with outside
sensor)
16 5 30 User
CP080 Temperature (°C) set by SLEEP activity in the zone 16 5 30 User
CP081 Temperature (°C) set by HOME activity in the zone 20 5 30 User
CP082 Temperature (°C) set by AWAY activity in the zone 6 5 30 User
CP083 Temperature (°C) set by MORNING activity in the zone 21 5 30 User
CP084 Temperature (°C) set by EVENING activity in the zone 22 5 30 User
CP085 Temperature (°C) set by CUSTOM activity in the zone 20 5 30 User
CP200 Required ambient temperature (°C) for the zone in manual mode 20 5 30 User
CP250 Correct the temperature measured by the room unit 0 -5 +5 User
CP320
Zone operating mode
0: Scheduling
1: Manual
2: Off
0– – User
CP510 Temporary room setpoint per zone 20 5 30 User
CP550
Fireplace mode
0: Disabled
1: Enabled
0 – – User
CP570
Timer programme selected by User
0: Program 1
1: Program 2
2: Program 3
0 – – User
DP060
Timer programme selected for DHW
0: Program 1
1: Program 2
2: Program 3
0 – – User
DP080 Reduced temperature setpoint for the domestic hot water tank [°C] 35 10 60 User
DP337 Domestic hot water temperature setpoint for the holiday period [°C] 10 10 60 User
Important
The factory values of some parameters may differ according to
the target market of the product.
200 Combi 2 17

7 Maintenance
7.1 General
7.2 Maintenance instructions
To ensure continued safety, functionality and efficiency, the boiler must
be inspected annually by the installer/service engineer in order to ensure
the performance of the product constant over time, we recommend
having the boiler's energy efficiency checked annually by a qualified
technician. Accurate maintenance is always a reason for safety and
savings in the management of the system.
Periodically check that the pressure shown on the display with the system
cold is between 1 - 1.5 bar. If it is lower, act on the system filling tap. It is
advisable that the opening of this tap is carried out very slowly in order to
facilitate degassing.
Important
The boiler is equipped with a hydraulic pressure switch which
does not allow the boiler to operate in case of low pressure.
If frequent pressure drops should occur, call the installer/
service engineer
7 Maintenance
Fig.8 Water pressure
7.2.1 Filling the installation
If the water pressure is too low, the system must be re-pressurised.
The normal operating water pressure is between 1 and 2 bar. If the pres
sure exceeds 3 bar the safety pressure valve will operate and a fault is in
dicated. Ensure that the temporary filling loop is disconnected. Contact
your installer.
It may be necessary to repressurise the system occasionally (when the
water pressure falls below 0.7). A filling device (the filling loop) will be
fitted on the system. This will be on the boiler itself, or on pipework near to
the boiler. Seek advice from your installer.
Note
If the water pressure requires regular re-pressurising a fault or
leak is indicated. Seek advice from your installer.
The boiler does not require any special maintenance. However, the boiler
must be serviced annually in accordance with the Installation and Service
Manual and the relevant section of the Benchmark Service Record com
pleted in order to maintain the warranty.
Note
Taking out a maintenance contract is recommended.
Caution
Maintenance operations must be performed by a qualified compe
tent person.
Use only BAXI genuine spare parts.
The painted panels should be wiped with a damp cloth and then dried
completely. DO NOT USE ABRASIVE CLEANING AGENTS.
Note
The system pressure is shown at all times on the LCD display
and can be viewed when there is power to the boiler.
When the figures on the display indicates between 1 and 1.5 bar the
pressure is correct.
18 200 Combi 2

7.2.2 Venting the installation
It is essential to eliminate any air in the boiler, pipes or fittings because
this can cause irritating noise during heating or the intake of water. To do
this, proceed as follows:
Important
Take care as the water might still be hot.
Important
If the hydraulic pressure of the water in the central heating
system is below 0.8 bar, it is advised to increase the pressure
(the recommended hydraulic pressure is 1.0 - 1.5 bar).
Fig.9 Venting the installation
BO-0000026
1
2
3
4
C1
A
B
C
D
7 Maintenance
1. Open the valves (A & B) of all the radiators connected to the central
heating system.
2. Set the ambient thermostat as high as possible.
3. Wait for the radiators to heat up.
4. Set the ambient thermostat as low as possible.
5. Wait about 10 minutes until the radiators have cooled down.
6. Vent the radiators. Start with the lower floors.
7. Open the vent valve (C & C1) holding a cloth (D) against the valve.
8. Wait until water comes out of the vent valve and then tighten it
again.
9. After venting, check that the system is still at sufficient pressure.
The purpose of this function is to warn the user that the boiler requires
maintenance.
flashes, When the letters SVC appear on the screen and the symbol
the boiler requires maintenance. Contact your installer.
7.3 Maintenance message
Fig.10 Maintenance message
200 Combi 2 19

8 Troubleshooting
8.1 Temporary and permanent faults
The codes on the display indicate two types of fault: volatile and
permanent. The first item shown on the display is a letter followed by a
two-digit number. The letter indicates the type of fault: temporary (H) or
permanent (E). The number indicates the group in which the fault that has
occurred is classified according to its impact on safe and reliable
operation. The second item shown flashes alternately with the first and
consists of a two-digit number that indicates the type of fault which has
occurred (see the following fault tables).
TEMPORARY FAULT (A/H.x.x.)
A temporary fault is shown on the display by the letter “A” or “H” followed
by a number (group). A temporary fault is a type of fault that does not
cause a permanent stoppage of the boiler. It has the following
characteristics:
A: The appliance continues to operate. It disappears as soon as the cause
has been resolved.
H: Disappears when the error condition is removed, in some cases even
after 10 minutes.
PERMANENT FAULT (E.x.x)
A permanent fault is shown on the display by the letter "E" followed by a
number (group). Press the RESET button for one second. If faults are
shown frequently, contact our authorised technical assistance centre.
E: Stoppage, reset required..
8.2 Error codes
8 Troubleshooting
Tab.11 List of temporary faults
DISPLAY
DESCRIPTION OF TEMPORARY FAULTS
CAUSE – Check/Solution
An installer is required for most checks and solu
tions.
Group
code
Specific
code
H.00 .42 Pressure sensor open/faulty
SENSOR/CONNECTION PROBLEM
Check the operation of the pressure sensor
Check the sensor/PCB connection
H.01 .00 Temporary communication failure in the PCB The error is resolved automatically
H.01 .05 Maximum temperature difference value between flow
and return reached.
INSUFFICIENT CIRCULATION
Check the boiler/installation circulation
Activate a manual venting cycle
Check the installation pressure
OTHER CAUSES
Check the cleanliness of the exchanger
Check the operation of the temperature sensors
Check the temperature sensor connection
H.01 .08 Flow temperature increase in heating mode too quick.
INSUFFICIENT CIRCULATION
Check the boiler/installation circulation
Activate a manual venting cycle
Check the installation pressure
Check the operation of the pump
OTHER CAUSES
Check the cleanliness of the exchanger
Check the operation of the temperature sensors
Check the temperature sensor connection
H.01 .14 Maximum flow or return temperature value reached.
INSUFFICIENT CIRCULATION
Check the boiler/installation circulation
Activate a manual venting cycle
20 200 Combi 2