© Baxi Heating UK Ltd 2008
2
Contents
1. Introduction.....................................................4
2. Technical Data.................................................6
3. Installation Requirements..............................8
3.1
General Information........................................8
3.2
Legislation, Standards & Codes of Practice....8
3.3
Gas Supply......................................................8
3.4
Electricity Supply.............................................9
3.5
Location of Boiler............................................9
3.6
Condensate Disposal....................................10
3.7
Air Supply......................................................11
3.8
Flue Systems...........................................11
3.9
Plume Displacement....................................18
3.10 Water Circulating Systems...........................22
4. Installation.....................................................26
4.1
Unpack, Prepare the Wall & Boiler................26
4.2
Install the Flue...............................................27
4.3
Electrical Connections..................................28
4.4
Connect the Gas Supply...............................29
4.5
Connect the Water System...........................29
4.6
Connect the Condensate Drain.....................29
5. Wiring Diagrams............................................30
6. Commissioning.............................................32
6.1
Commission the Systems.............................32
6.2
Commission the Boiler..................................32
6.3
Flush the System..........................................32
6.4
Final Adjustments.........................................33
6.5
Advise the User.............................................33
6.6
Documentation.............................................33
7. Control Sequence.........................................34
8. Fault Finding Guides.....................................35
9. Servicing & Parts Replacement...................42
9.1
Servicing Procedure.....................................42
9.2
General Access............................................44
9.3
PCB Enclosure.............................................44
9.4
Gas Valve......................................................44
9.5
Air Pressure Switch.......................................45
9.6
Spark Igniter..................................................45
9.7
Flow/Casting Sensors...................................45
9.8
Overheat Sensor...........................................45
9.9
Fan & Flue Hood...........................................46
9.10 Electrodes/Burner.........................................47
9.11 Injector..........................................................47
9.12 Combustion Chamber Insulation...................48
9.13 Condensate Trap...........................................49
9.14 Primary Heat Exchanger...............................50
9.15 Secondary Heat Exchanger..........................51
10.
Short Spares List......................................52
Benchmark Commissioning Checklist ............54
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. From 1 April 2005 this can be achieved via
a Competent Persons Self Certification Scheme as an
option to notifying the Local Authority directly. Similar
arrangements will follow for Scotland and will apply in
Northern Ireland from 1 January 2006.
CORGI operate a Self Certification Scheme for gas
heating appliances.
These arrangements represent a change from the
situation whereby compliance with Building Regulations
was accepted as being demonstrated by completion of
the Benchmark Logbook (which was then left on site
with the customer).
With the introduction of Self Certification Schemes, the
Benchmark Logbook is being withdrawn. However, a
similar document in the form of a commissioning
checklist and service interval record is incorporated at
the back of these instructions.
Potterton 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.
