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Worcester Greenstar 9Ri ErP +
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Bosch Worcester Greenstar 21Ri ErP +, Worcester Greenstar 9Ri ErP +, Worcester Greenstar 24Ri ErP +, Worcester Greenstar 18Ri ErP +, Worcester Greenstar 12Ri ErP + Installation And Maintenance Instructions Manual

...
UK/IE
Installation and Maintenance Instructions
6720644744-00.1Wo
Wall hung rsf gas fired condensing appliance
Greenstar Ri
ErP +
For open vented & sealed system central heating systems & indirect mains fed domestic hot water
These appliances are for use with: Natural Gas or LPG (Cat. II 2H 3P type C13, C33 & C53)
Model GC Number
12Ri 15Ri 18Ri 21Ri 24Ri
12Ri 15Ri 18Ri 21Ri 24Ri
ErP +
ErP +
ErP +
ErP +
ErP +
ErP +
ErP +
ErP +
ErP +
ErP +
ErP +
ErP +
Natural Gas 9Ri
LPG 9Ri
41-406-74 41-406-75 41-406-76 41-406-77 41-406-78 41-406-79 41-406-68 41-406-69 41-406-70 41-406-71 41-406-72 41-406-73
If you smell gas: ▶ Keep well away from the building: call the National Gas Emergency
Service on 0800 111 999.
▶ LPG appliances: Call the supplier’s number on the side of the gas
tank.

Contents

CONTENTS
1 KEY TO SYMBOLS AND SAFETY PRECAUTIONS . . . . . . . . . . . . 4
1.1 Key to symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2 Safety precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 Regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3 APPLIANCE INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.1 Appliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.2 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.3 Energy efficiency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.4 appliance main components . . . . . . . . . . . . . . . . . . . . . 12
3.5 Internal wiring diagram . . . . . . . . . . . . . . . . . . . . . . . . . 13
4 PRE-INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.1 Mains supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.1.1 Electrical supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.1.2 Gas supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.2 Water systems and pipe work . . . . . . . . . . . . . . . . . . . . 14
4.3 Condensate discharge . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.3.1 Condensate pipe work . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.3.2 Internal connections . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.3.3 External connection considerations . . . . . . . . . . . . . . . 18
4.4 Pressure relief pipe work . . . . . . . . . . . . . . . . . . . . . . . 19
4.4.1 Alternative PRV connections - Combined
PRV/condensate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.5 appliance location and clearances . . . . . . . . . . . . . . . . 20
4.5.1 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.5.2 Servicing clearances -
Ventilated compartment . . . . . . . . . . . . . . . . . . . . . . . . 20
4.5.3 Compartments: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.5.4 appliance clearances- Unventilated
compartments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.5.5 Installation clearances - unventilated
compartments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.5.6 Rooms containing a bath or shower . . . . . . . . . . . . . . . 21
4.6 Plumbing manifold . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.6.1 Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.7 Flue options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.7.1 Flue lengths . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.8 Flue terminal positions . . . . . . . . . . . . . . . . . . . . . . . . . 25
4.8.1 Vertical flue terminal positions . . . . . . . . . . . . . . . . . . . 25
4.8.2 Horizontal flue terminal positions . . . . . . . . . . . . . . . . 26
4.8.3 Plume re-direct and plume management terminal
positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
4.9 Cleaning primary systems . . . . . . . . . . . . . . . . . . . . . . . 30
4.9.1 Flushing the system . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
5 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
5.1 Unpacking the wall frame & ancillary items . . . . . . . . . . 31
5.2 Position the appliance . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5.3 Wall mounting template & flue opening . . . . . . . . . . . . . 32
5.4 Outer case removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
5.5 appliance connection . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
5.5.1 Condensate connection . . . . . . . . . . . . . . . . . . . . . . . . . 34
5.6 Flue turret/adaptor installation . . . . . . . . . . . . . . . . . . . 35
5.7 Electrical connections . . . . . . . . . . . . . . . . . . . . . . . . . . 36
6 COMMISSIONING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
6.1 Pre-Commissioning checks . . . . . . . . . . . . . . . . . . . . . . 37
6.2 Filling the system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
6.3 Water treatment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
6.4 Starting the appliance . . . . . . . . . . . . . . . . . . . . . . . . . . 39
6.4.1 Appliance controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
6.5 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
6.5.1 Checking the gas inlet pressure . . . . . . . . . . . . . . . . . . . 39
6.5.2 Checking the gas rate . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
6.6 CO and Combustion checks . . . . . . . . . . . . . . . . . . . . . . 40
6.7 Finishing commissioning . . . . . . . . . . . . . . . . . . . . . . . . 42
6.7.1 Replace the outer case: . . . . . . . . . . . . . . . . . . . . . . . . . 42
6.7.2 Install the bottom panel . . . . . . . . . . . . . . . . . . . . . . . . . 42
6.7.3 Hand over . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
6.7.4 Appliance guarantee . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
7 SERVICE AND SPARES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
7.1 Inspection and service . . . . . . . . . . . . . . . . . . . . . . . . . . 43
7.2 Checking gas inlet pressure . . . . . . . . . . . . . . . . . . . . . . 44
7.3 Checking flue integrity . . . . . . . . . . . . . . . . . . . . . . . . . . 45
7.4 Fan pressure test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
7.5 Flue gas analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
7.6 Setting the air/gas ratio . . . . . . . . . . . . . . . . . . . . . . . . . 47
7.6.1 Setting the CO/CO2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
7.7 Cleaning the heat exchanger . . . . . . . . . . . . . . . . . . . . . 47
7.7.1 Syphon removal and cleaning . . . . . . . . . . . . . . . . . . . . 49
7.8 Replacement of parts . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
7.8.1 Removing the outer casing . . . . . . . . . . . . . . . . . . . . . . . 50
7.8.2 Primary sensor (CH NTC) . . . . . . . . . . . . . . . . . . . . . . . . 50
7.8.3 Overheat thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
7.8.4 Flue overheat thermostat
(with grommet) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
7.8.5 Lowering the appliance controls to the service
position: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
7.8.6 Gas valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
7.8.7 Air/gas manifold and fan assembly . . . . . . . . . . . . . . . . 52
7.8.8 Air pressure switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
7.8.9 Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
7.8.10 Electrode assembly and burner . . . . . . . . . . . . . . . . . . . 54
7.8.11 Re-assembly of the burner clamping plate . . . . . . . . . . 54
7.8.12 Heat exchanger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
7.8.13 Syphon removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
7.8.14 Access to electrical control panel . . . . . . . . . . . . . . . . . 57
7.8.15 PCB Fuse and code plug . . . . . . . . . . . . . . . . . . . . . . . . . 57
7.8.16 PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
6 720 821 670 (2018/06)2
8 FAULT FINDING AND DIAGNOSIS . . . . . . . . . . . . . . . . . . . . . . 58
8.1 Fault finding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
9 OPERATIONAL FUNCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
9.1 Appliance function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
9.2 Protection function . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
9.3 Component Characteristics . . . . . . . . . . . . . . . . . . . . . 62
9.3.1 Flow temperature (NTC) Sensor resistances . . . . . . . . 62
9.3.2 Flue overheat thermostat . . . . . . . . . . . . . . . . . . . . . . . 62
9.3.3 Overheat thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
9.3.4 Gas valve coil resistances . . . . . . . . . . . . . . . . . . . . . . . 62
9.3.5 Code plug numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Contents
6 720 821 670 (2018/06) 3

KEY TO SYMBOLS AND SAFETY PRECAUTIONS

1
1 KEY TO SYMBOLS AND SAFETY
PRECAUTIONS

1.1 KEY TO SYMBOLS

WARNINGS

Warnings in this document are identified by a warning triangle printed against a grey background. Keywords at the start of a warning indicate the type and seriousness of the ensuing risk if measures to prevent the risk are not taken.
The following keywords are defined and can be used in this document:
• NOTICE indicates a situation that could result in damage to property or equipment.
• CAUTION indicates a situation that could result in minor to medium injury.
• WARNING indicates a situation that could result in severe injury or death.
• DANGER indicates a situation that will result in severe injury or death.

IMPORTANT INFORMATION

List entries, first and second levels
• A single component/item
• A component/list, made up of multiple parts/items. – Sub component or sublist of main component/list. –etc.

SYMBOLS USED IN THIS MANUAL

Domestic Hot Water
Central Heating
Hot Water Storage Cylinder
Domestic Cold Water Supply
Gas Supply
Table 2 Commonly used symbols

PLEASE READ THESE INSTRUCTIONS CAREFULLY BEFORE STARTING INSTALLATION.

This symbol indicates important information where there is no risk to people or property.

ADDITIONAL SYMBOLS

Symbol Meaning
a numbered step in an action sequence
a step in an action sequence
a reference to a related part in the document or to other
related documents a reference number to identify or refer to a part or item
a list entry
a list entry (second level)
Table 1 Symbols
Examples of additional symbols used
A numbered step in an action sequence
A sequence of numbered steps or actions carried out in a specific order to complete a task.
1. First action
2. Second action
3. Third action etc.
A step in an action sequence
A sequence of defined actions or steps carried out in order to complete a task.
▶Action ▶ Next action ▶etc
A reference to a related part in the document or to other related documents.
To refer the reader to a specific figure/table/section within the manual. e.g. figure 1.
A reference number to identify or refer to a part or item.
In a related figure, items or parts identified by a sequential number.
These instructions are applicable to the Worcester appliance model(s) stated on the front cover of this manual only and must not be used with any other make or model of appliance.
These instructions apply in the UK and Ireland only and must be followed except for any statutory obligations.
This appliance must be installed and serviced by a GAS SAFE registered, competent person. Failure to install correctly could lead to prosecution.
If you are in any doubt, contact the Worcester Technical helpline (0330 123 3366).
Please leave these instructions with the completed BENCHMARK CHECKLIST, (or a certificate confirming compliance with IS 813, Eire only) and the user manual with the owner or at the gas meter after installation or servicing.
Distance learning and training courses are available from Worcester. The BENCHMARK CHECKLIST can be found in the back of this
Installation manual.
ØDiameter NG Natural Gas LPG Liquid Petroleum Gas CH Central Heating DHW Domestic Hot Water DCW Domestic Cold Water DWTA Domestic Water Treatment Association PRV Pressure Relief Valve NTC Negative Temperature Coefficient (sensor) IP Ingress Protection RCD Residual Current Device TRV Thermostatic Radiator Valve ECV Emergency Control Valve WRAS Water Regulations Advisory Scheme SEDBUK Seasonal Efficiency of Domestic Boilers in the United
Kingdom
Table 3 Abbreviations use in this manual
6 720 821 670 (2018/06)4
KEY TO SYMBOLS AND SAFETY PRECAUTIONS

1.2 SAFETY PRECAUTIONS

IF YOU SMELL GAS
A gas leak could potentially cause an explosion. If you smell gas, observe the following rules.
▶ Prevent flames or sparks:
– Do not smoke, use a lighter or strike matches. – Do not operate any electrical switches or unplug any equipment.
– Do not use the telephone or ring doorbells. ▶ Turn off the gas at the meter or regulator. ▶ Open windows and doors. ▶ Warn your neighbours and leave the building. ▶ Prevent anyone from entering the building. ▶ Well away from the building: call the National Gas Emergency Service
on 0800 111 999. ▶ LPG appliances: Call the supplier’s number on the side of the gas tank.
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 centralheating.co.uk for more information.
Health and safety
The appliance contains no asbestos and no substances have been used in the construction process that contravene the COSHH Regulations (Control of Substances Hazardous to Health Regulations 1988).
Combustion and corrosive materials
Do not store or use any combustible materials (paper, thinners, paints etc.) inside or within the vicinity of the appliance.
Chemically aggressive substances can corrode the appliance and invalidate any warranty.
Fittings and modifications
Fitting the appliance and any controls to the appliance may only be carried out by a competent engineer in accordance with the current Gas Safety (Installation and Use) Regulations. Flue systems must not be modified in any way other than as described in the fitting instructions. Any misuse or unauthorised modifications to the appliance, flue or associated components and systems could invalidate the warranty. The manufacturer accepts no liability arising from any such actions, excluding statutory rights.
Servicing
Advise the user to have the system serviced annually by a competent, qualified Gas Safe registered engineer. Approved spares must be used to help maintain the economy, safety and reliability of the appliance.
Important The service engineer must complete the Service Record on the
Benchmark Checklist after each service.
FLUE SYSTEM
Only use the approved Worcester Condensfit II flue system with this appliance.
WORCESTER ORIGINAL SPARE PARTS
Only use Worcester original spare parts with this appliance. Non Worcester original spare parts will invalidate the guarantee (if applicable) and any warranty.
6 720 821 670 (2018/06) 5
Regulations

2Regulations

Installation regulations

Current Gas Safety (Installation & Use) Regulations: All gas appliances must be installed by a competent person in
accordance with the above regulations. Failure to install appliances correctly could lead to prosecution.
The appliance must be installed in accordance with, and comply to, the current: Gas Safety Regulations, IET Regulations, Building Regulations, Building Standards (Scotland) (Consolidation), Building Regulations (Northern Ireland), local water by-laws, Health & Safety Document 635 (The Electricity at Work Regulations 1989), EU Regulations No. 811/ 2013 - Energy Labelling and any other local requirements.

British standards

Where no specific instruction is given, reference should be made to the relevant British Standard codes of Practice. BS7074:1 Code of practice for domestic and hot water supply BS6891 Installation of low pressure gas pipe work up to 28mm
(R1)
BS5546 Installation of gas hot water supplies for domestic
purposes EN12828 Central heating for domestic premises BS5440:1 Flues and ventilation for gas appliances of rated heating
not exceeding 70kW (net): Flues BS5440:2 Flues and ventilation for gas appliances of rated heating
not exceeding 70kW (net): Air Supply BS7593 Treatment of water in domestic hot water central heating
systems BS6798 Installation of gas fired boilers of rated input up to 70kW
(net)

LPG Installations

An appliance using LPG must not be installed in a room or internal space below ground level unless one side of the building is open to the ground.

Irish Standards

The relevant Irish standards should be followed, including:
• ECTI National rules for electrical installations
• IS 813:2002 for Domestic Gas Installations.

Timber Framed Buildings

Where the boiler is to be fitted to a timber framed building the guidelines laid down in BS5440: Part 1 and IGE "Gas Installations in Timber Frame Buildings” should be adhered to.

Potable Water

All seals, joints and compounds (including flux and solder) and components used as part of the secondary domestic water system must be approved by WRAS.

CH Water

Artificially softened water must not be used to fill the central heating system.
6 720 821 670 (2018/06)6

3 APPLIANCE INFORMATION

1
2
3
6
6720813283-02.1Wo
390mm
270mm
*600mm to top of case front
590mm*
4
5

3.1 APPLIANCE

APPLIANCE INFORMATION
Fig. 1 Appliance
Do not use the pre-formed copper pipes supplied with the appliance for the gas supply. These copper pipes are for water only.
STANDARD PACKAGE:
1 Wall hung gas fired condensing regular appliance for central
heating and domestic hot water 2 Tail pipes - water only 3 Wall plate 4 Hardware literature pack (see checklist) 5ErP Label 6 Bottom panel and wall mounting template
CHECK LIST
- HARDWARE LITERATURE PACK:
Appliance Installation, Commissioning and Servicing Instructions
Users Instructions 1 Consumer Guarantee Card 1 Sealing Pack: 1
- Compression Nut 22mm 3
- Compression Ring 22mm 3
Elbow assembly pack 1
- Elbow Assembly 1
- Fibre Washer 1
Table 4 Hardware lit pack - checklist
Qty.
1
6 720 821 670 (2018/06) 7
APPLIANCE INFORMATION

3.2 TECHNICAL DATA

Natural Gas Appliances
DESCRIPTION NATURAL GAS
UNIT 9kW 12kW 15kW 18kW 21kW 24kW
Gas flow rate - Max. 10 minutes from lighting
Natural Gas G20 m³/h 0.95 1.30 1.63 1.96 2.26 2.60
Central Heating
Max. rated heat input (net) kW 9.24 12.32 15.40 18.48 21.54 24.62 Min. heat input kW 3.45 3.45 4.62 5.54 7.38 7.38 Maximum rated heat output 40/30 °C kW 9.64 12.85 16.06 19.28 22.47 25.67 Maximum rated heat output 50/30 °C kW 9.55 12.74 15.92 19.11 22.27 25.45 Maximum rated heat output 80/60 °C kW 91215 18 21 24 Maximum flow temperature °C 82 82 82 82 82 82 Maximum possible flow temperature °C 87 87 87 87 87 87 Maximum permissible operating pressure bar 2.5 2.5 2.5 2.5 2.5 2.5
Flue
Flue gas temp. 80/60 °C, rated/min. load °C 60/56 62/56 66/58 70/60 74/63 78/63 Flue gas temp. 40/30 °C, rated/min. load °C 38/33 41/33 44/33 48/34 51/35 54/35 CO2 level at max. rated heat output (after 30 min) % 9.6 9.6 9.6 9.6 9.6 9.55 CO2 level at min. rated heat output (after 30 min) % 8.6 8.6 8.6 8.6 8.6 8.55 NOx class 666666 NOx rating mg/kWh 36.0 38.6 44.3 48.7 55.5 56.0
Condensate
Maximum condensate rate l/h 0.60 0.93 1.20 1.50 1.80 2.00 pH value, approx. 4.8 4.8 4.8 4.8 4.8 4.8
Electrical
Electrical power supply voltage A.C. V 230 230 230 230 230 230 Frequency Hz 50 50 50 50 50 50 Maximum power consumption W 25 33 44 49 42 51
General data
Appliance protection rating IP 20 20 20 20 20 20 Permissible ambient temperatures °C 0 - 50 0 - 50 0 - 50 0 - 50 0 - 50 0 - 50 Nominal capacity of appliance litre 1.1 1.1 1.1 1.1 1.1 1.1 Packaged appliance weight kg 31 31 31 31 31 31 Total appliance weight kg 27.4 27.4 27.4 27.4 27.4 27.4 Lift weight kg 22.6 22.6 22.6 22.6 22.6 22.6 SEDBUK 2005 % 89.8 89.8 89.7 89.7 89.6 89.6 SEDBUK 2009 % 89.1 89.1 88.9 88.9 88.7 88.7 Flue system Category II 2H 3P type C13, C33 & C53
Table 5 Technical data Natural Gas
6 720 821 670 (2018/06)8
APPLIANCE INFORMATION
LPG Appliances
DESCRIPTION LPG
UNIT 9kW 12kW 15kW 18kW 21kW 24kW
Gas flow rate - Max. 10 minutes from lighting
Propane Gas (LPG) kg/h 0.71 0.96 1.20 1.44 1.77 1.91
Central Heating
Max. rated heat input (net) kW 9.24 12.32 15.40 18.48 21.54 24.62 Min. heat input kW 5.95 5.95 5.95 9.64 9.64 9.64 Maximum rated heat output 40/30 °C kW 9.64 12.85 16.06 19.28 22.47 25.67 Maximum rated heat output 50/30 °C kW 9.55 12.74 15.92 19.11 22.27 25.45 Maximum rated heat output 80/60 °C kW 91215 18 21 24 Maximum flow temperature °C 82 82 82 82 82 82 Maximum possible flow temperature °C 87 87 87 87 87 87 Maximum permissible operating pressure bar 2.5 2.5 2.5 2.5 2.5 2.5
Flue
Flue gas temp. 80/60 °C, rated/min. load °C 59/57 62/57 66/59 71/61 75/64 79/64 Flue gas temp. 40/30 °C, rated/min. load °C 40/35 43/35 46/36 49/37 52/37 55/38 CO2 level at max. rated heat output (after 30 min) % 10.5 10.5 10.5 10.5 10.5 10.5 CO2 level at min. rated heat output (after 30 min) % 10 10 10 10 10 10 NOx class 666666 NOx rating mg/kWh 36.0 38.6 44.3 48.7 55.5 56.0
Condensate
Maximum condensate rate l/h 0.5 0.7 0.9 1.2 1.4 1.5 pH value, approx. 4.8 4.8 4.8 4.8 4.8 4.8
Electrical
Electrical power supply voltage A.C. V 230 230 230 230 230 230 Frequency Hz 50 50 50 50 50 50 Maximum power consumption W 26 36 52 55 44 54
General data
Appliance protection rating IP 20 20 20 20 20 20 Permissible ambient temperatures °C 0 - 50 0 - 50 0 - 50 0 - 50 0 - 50 0 - 50 Nominal capacity of appliance litre 1.1 1.1 1.1 1.1 1.1 1.1 Packaged appliance weight kg 31 31 31 31 31 31 Total appliance weight kg 27.4 27.4 27.4 27.4 27.4 27.4 Lift weight kg 22.6 22.6 22.6 22.6 22.6 22.6 SEDBUK 2005 % 90.1 90.1 90.5 90.4 90.0 90.0 SEDBUK 2009 % 89.0 89.0 89.1 89.2 88.9 88.9 Flue system Category II 2H 3P type C13, C33 & C53
Table 6 Technical data LPG
6 720 821 670 (2018/06) 9
APPLIANCE INFORMATION

3.3 Energy efficiency

Natural Gas appliances
The following product data satisfy the requirements of the EU Regulations No. 811/2013 and No. 812/2013 supplementing Directive 2010/30/EU.
Product data Symbol Unit 7733600306 7733600307 7733600308 7733600309 7733600310 7733600311
Product type – – 9Ri
ErP +
NG 12Ri Condensing boiler – – Yes Yes Yes Yes Yes Yes Low temperature boiler – – No No No No No No B1 boiler – – No No No No No No Cogeneration space heater
– – No No No No No No
(CHP) Combination heater – – No No No No No No Rated heat output P Seasonal space heating
rated
η
kW9 1215182124
%929292929292
s
energy efficiency Energy efficiency class––AAAAAA
Useful heat output
At rated heat output and high temperature regime
At 30 % of rated heat output and low temperature
2)
regime
P
1)
P
kW9 1215182124
4
kW445688
1
Useful efficiency
At rated heat output and
η
4
% 87.2 87.2 86.9 86.9 86.7 86.7
high temperature regime 1) At 30 % of rated heat output
η
1
% 98.1 98.1 97.6 97.6 97.2 97.2 and low temperature regime 2)
Auxiliary electricity consumption
At full load el At part load el In standby mode P
max
min
SB
kW 0.025 0.033 0.044 0.049 0.042 0.051 kW 0.016 0.016 0.018 0.018 0.017 0.017 kW 0.003 0.003 0.003 0.003 0.003 0.003
Other items
Standby heat loss P Ignition burner power
P
stby
ign
kW 0.059 0.059 0.059 0.059 0.059 0.059 kW000000
consumption Emissions of nitrogen
NOx mg/kWh 32 35 40 44 50 51
oxides Annual energy
Q
kWh------
HE
consumption Sound power level, indoors L
dB(A)454548505050
WA
Table 7 Product data for energy consumption
1) High-temperature regime means 60 °C return temperature at heater inlet and 80 °C feed temperature at heater outlet.
2) 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).
ErP +
NG 15Ri
ErP +
NG 18Ri
ErP +
NG 21Ri
ErP +
NG 24Ri
ErP +
NG
6 720 821 670 (2018/06)10
APPLIANCE INFORMATION
LPG appliances
The following product data satisfy the requirements of the EU Regulations No. 811/2013 and No. 812/2013 supplementing Directive 2010/30/EU.
Product data Symbol Unit 7733600300 7733600301 7733600302 7733600303 7733600304 7733600305
Product type – – 9Ri
ErP +
LPG 12Ri
ErP +
LPG 15Ri
ErP +
LPG 18Ri
ErP +
LPG 21Ri
ErP +
LPG 24Ri
ErP +
LPG Condensing boiler – – Yes Yes Yes Yes Yes Yes Low temperature boiler – – No No No No No No B1 boiler – – No No No No No No Cogeneration space heater
– – No No No No No No
(CHP) Combination heater – – No No No No No No Rated heat output P Seasonal space heating
rated
η
kW9 1215182124
%929292929292
s
energy efficiency Energy efficiency class––AAAAAA
Useful heat output
At rated heat output and high temperature regime
At 30 % of rated heat output and low temperature
2)
regime
P
1)
P
kW9 1215182124
4
kW 6 6 6 10 10 10
1
Useful efficiency
At rated heat output and high temperature regime
At 30 % of rated heat output and low temperature
2)
regime
η
4
1)
η
1
% 87.2 87.2 86.9 86.9 86.7 86.7
% 98.1 98.1 97.6 97.6 97.2 97.2
Auxiliary electricity consumption
At full load el At part load el In standby mode P
max
min
SB
kW 0.026 0.036 0.052 0.055 0.044 0.054 kW 0.019 0.019 0.018 0.023 0.019 0.019 kW 0.003 0.003 0.003 0.003 0.003 0.003
Other items
Standby heat loss P Ignition burner power
P
stby
ign
kW 0.059 0.059 0.059 0.059 0.059 0.059 kW000000
consumption Emissions of nitrogen
NOx mg/kWh 32 35 40 44 50 51
oxides Annual energy consumption Q Sound power level, indoors L
kWh------
HE
dB(A)454548505050
WA
Table 8 Product data for energy consumption
1) High-temperature regime means 60 °C return temperature at heater inlet and 80 °C feed temperature at heater outlet.
2) 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).
6 720 821 670 (2018/06) 11
APPLIANCE INFORMATION
1
23
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
6720804541-01.1Wo

3.4 APPLIANCE MAIN COMPONENTS

1 Air/Gas Manifold 2 Sensor - appliance flow 3 Flow pipe 4 Return pipe 5 Removable servicing panel 6 Electrode assembly 7 Overheat thermostat 8 Silicon tube - Heat Exchanger air vent 9Heat Exchanger 10 Flue overheat thermostat 11 Access panel - Heat Exchanger/Sump cleaning 12 Return connector with drain point 13 Flow connector 14 Appliance Temperature control and Reset knob
15 Power and fault indicator (blue) 16 Wiring connections cover 17 Burner indicator (green) 18 Appliance ON/OFF switch 19 Condensate connection 20 Syphon / Trap 21 Gas inlet connection 22 Mains cable inlet 23 Gas Valve 24 Flue air pressure switch connection 25 Fan 26 Manual vent point 27 Fan pressure test point 28 Air pressure switch
6 720 821 670 (2018/06)12

3.5 Internal wiring diagram

SPARK TRANSFORMER
DIAGNOSTIC INTERFACE
CODE PLUG
MODE SWITCH
Slow 2 A fuse,
AC 230 V
EMS BUS
CH TEMPERATURE CONTROL
ON/OFF SWITCH
ST9
ST6
ST5
ST2
ST1
F1
230V~
Min
Max
Norm
LN LP NPLR
Earth
11
COMMON
230V MAINS
SUPPLY
SL
L
N
6720644744-27.3Wo
4
10
8
9
1
2
12
3
5
6
7
Colour sequence
Colour sequence
Green
Live
Neutral
Red
Blue
Violet
Orange
Pump Live
Pump Neutral
Switched Live
LN
LP
LRNP
APPLIANCE INFORMATION
Fig. 2 Electrical diagram
[1] Air pressure switch [2] Fan (fan wiring: Live = purple wire, Neutral = brown wire [3] Flue overheat thermostat [4] Flow temperature sensor (NTC) [5] Flame sense electrode [6] Spark electrodes [7] Overheat thermostat [8] External pump [9] PCB [10] External wiring center/junction box [11] Earth bar connection [12] Gas valve
6 720 821 670 (2018/06) 13
Installer connections Connection Function
ST1 230V supply to the appliance
ST2 External pump supply connections and Switched live
• Live input (L)
• Neutral input (N)
(Live Return) to the appliance
•Pump Live (LP)
• Pump Neutral (NP)
• Demand input (LR)
• Earth connection, external pump supply
Earth • Earth connection, appliance 230V supply
PRE-INSTALLATION

4 PRE-INSTALLATION

NOTICE: All the following Pre-Installation sections must
be read and requirements met before starting appliance or flue installations.
CAUTION: Isolate the mains supplies before starting a ny work and observe all relevant safety precautions.

4.1 MAINS SUPPLY

4.1.1 ELECTRICAL SUPPLY
• Supply: 230V - 50 Hz, 140 Watts
• Cable: PVC insulated 0.75mm
• External 3A fuse to BS1362.
• The appliance must be earthed.
• Do not connected the appliance to a 3 phase supply.
• IP20.
• Wiring must comply with the latest edition of BS 7671 (IET wiring regulations).
4.1.2 GAS SUPPLY
To ensure that the equipment is in good working order and can meet the gas flow and pressure requirements, in addition to the demand from any other appliance being served, the following applies:
• Appliances using Natural Gas (NG) must be connected to a governed meter.
• Liquid Petroleum Gas (LPG) must be connected to a regulator.
• Installation and connection of the gas supply to the appliance must be in accordance with BS6891.
• Gas pipe sizing should be calculated to ensure no more than the
permitted mbar drop between the meter/governor to the appliance inlet. ( Commissioning section).
• The meter or regulator and pipe work to the meter must be checked, preferably by the gas supplier.
2
(24 x 0.2mm) temp. rated to 90 °C.

4.2 WATER SYSTEMS AND PIPE WORK

PLASTIC PIPE WORK:
• Any plastic pipe work must have a polymeric barrier with 600mm (minimum) length of copper pipe connected to the appliance.
• Plastic pipe work used for underfloor heating must be correctly controlled with a thermostatic blending valve limiting the temperature of the circuits to approximately 50 °C.
PRIMARY SYSTEMS CONNECTIONS/VALVES:
• All system connections, taps and mixing valves must be capable of sustaining a pressure up to 3 bar.
• Radiator valves should conform to BS2767:10.
• All other valves should conform to BS1010.
• It is best practice to fit Thermostatic Radiator Valves (TRV's) to all radiators except the area where the room thermostat is sited which must be fitted with lockshield valves that are left open.
• If the circulating pump speed is fixed and system circulation can be
significantly adjusted or stopped by TRV's or zone valves, a system bypass should be installed to give at least a 3 metre circuit when activated. However; any appliance fitted with a modulating pump may not require a system bypass.
• A drain cock is required at the lowest point in the system.
• An air vent is required at all high points in the system.
NOTICE: To prevent reverse circulation ▶ The cylinder return must be the last connection on the
common return pipe.
NOTICE: Artificially softened water must not be used to fill the central heating system.
Pump speed characteristics ▶ In order to save as much energy as possible and the
minimise the possibility of water circulation noise. The circulating pump should be selected and adjusted to suit the system resistance.
OPEN VENT PRIMARY SYSTEM CONSIDERATIONS:
• The open vent pipe and feed and expansion pipe must rise continuously from the appliance.
• Close coupled feed and expansion pipe maximum separation of
150mm.
• The feed and expansion cistern must be positioned to provide a
minimum static head of 250mm above the highest point in the heating system to the water level in the feed and expansion cistern.
• Ensure adequate space is left in the expansion cistern for expansion
of the system water.
• No valve shall be fitted in the open vent pipe or the feed and
expansion pipe.
• The open vent pipe must be at least 22mmØ.
• Do not use galvanised pipes or radiators.
SEALED PRIMARY SYSTEM CONSIDERATIONS:
• The CH sealed system must be filled using a WRAS approved filling loop or comply with figure 3 for system fill.
• An expansion vessel, of a size suitable for the system, must be fitted as close as possible to the appliance in the central heating return.
• Also fit a pressure gauge, a 3 bar pressure relief valve and stop cock (fixed cylinder type or sealed system approved connection).
• No valve shall be fitted that can isolate the appliance from the
expansion vessel or pressure relief valve.
• An automatic air vent must be fitted.
• Do not use galvanised pipes or radiators.
6 720 821 670 (2018/06)14
PRE-INSTALLATION
Y PLAN LAYOUT
8
7
1
3
2
4
5
150 mm
max
reset max
M
6720644744-04.1Wo
SYSTEM FILL
SYSTEM FILL
Heating
return
SV SV
Hose union
Temporary hose
CV = Check Valve SV = Stop Valve
SYSTEM MAKE UP
Heating
return
AA
SV
CV
Fig. 3 System fill/System make-up
S AND Y PLAN SYSTEMS:
NOTICE: Bypass considerations
▶ Appliances fitted with a modulating pump may not
require a system bypass.
CV
CV
Test point
AA = Auto Air vent CV = Check Valve
Make up
vessel
1000 mm (39 in) above the highest point of the system.
Mains
supply
SYSTEM LAYOUTS EXAMPLES:
S PLAN LAYOUT - OPEN VENT
S PLAN LAYOUT
1
3
2
8
7
150 mm
max
reset max
6720644743-08.2Wo
5
4
M
M
6
6720644744-03.1Wo
Fig. 4 S plan open vent
Y PLAN LAYOUT - OPEN VENT
1 Static head -
Minimum static head 250mm measured from the highest point in the heating system (top surface of the appliance or the highest point in the heating system) to the water level in
the feed and expansion tank 2 Heating vent (22mm minimum) 3 Primary cold feed (15mm minimum) 4 Diverter/Zone valve 5 Pump, maximum power 90 Watts 6 Automatic bypass 7 Radiator valve (Flow) 8 Lock shield valve (Return) 9 Expansion vessel
10 Pressure gauge 11 3 bar pressure relief valve 12 Stop cock
Table 9 Key to figures 4, 5, 6, 7 & 8
NOTICE: A drain cock should be fitted at the lowest point of the heating circuit and beneath the appliance.
Fig. 5 Y plan open vent
6 720 821 670 (2018/06) 15
PRE-INSTALLATION
SEALED SYSTEM LAYOUT
MCW
8
7
4
10
12
11
9
5
reset max
M
6720644744-05.1Wo
6720644744-61.1Wo
8
7
1
3
2
4
6
5
150 mm
max
M
reset max
MM
OPEN VENT LAYOUT
6720644744-62.1Wo
8
7
4
6
5
M
reset max
MM
SEALED SYSTEM LAYOUT
MCW
12
10
11
9
SEALED SYSTEM Y PLAN LAYOUT
The central heating sealed system must be filled using a WRAS approved filling loop or comply with figure 3 for System fill.
Fig. 6 Y plan sealed system
NEW BUILD SYSTEM LAYOUTS
The latest Part L1a regulation for new installations require separate zone controls for the central heating.
Open vent with two heat zones

4.3 Condensate discharge

Full details on condensate discharge. ▶ Follow the latest version of BS6798 and HHIC
guidance.
For correct installation and trouble free operation of the appliance the following advice should be followed:
1. All condensate pipework must ‘fall’ from the appliance by a minimum of 3 degrees (52mm per metre) to ensure adequate Condensate flow.
2. The pipework route must allow air to be supplied back to the appliance for correct operation of the siphon.
3. Connection to a rainwater down pipe must include an air break.
Also:
• Keep external pipework as short as possible and not exceed 3 metres length.
• External pipework should be increased to a minimum diameter of 32mm and ideally be insulated.
• Minimise the number of bends and connectors.
• Remove burrs after cutting pipe.
• Remove surplus solvent from the interior of the pipe.
4.3.1 CONDENSATE PIPE WORK
NOTICE:
▶ Where a new or replacement appliance is being
installed, access to an internal “gravity discharge” point should be one of the factors considered in determining appliance location.
▶ The condensate pipe must be nominally
22mm Ø plastic pipe.
▶ The condensate pipe work must fall at least 52mm
per metre towards the outlet and should take the shortest practicable route.
▶ Ensure there are no blockages in the pipe run.
Fig. 7 Two heating zones open vent
Sealed system with two heat zones
Fig. 8 Two heating zones sealed system
NOTICE: Unheated internal areas. Although the large volume siphon will reduce the risk of
freezing, condensate discharge may freeze in areas of prolonged cold temperatures.
▶ Internal pipe runs in unheated areas such as lofts,
basements and garages should be treated as external runs.
Key to condensate illustrations, figures 9, 10, & 11 1 Condensate discharge from appliance 2 Soil and vent stack 3 Minimum 450mm and up to three storeys 4 Visible air break at plug hole 5 Sink or basin with integrated overflow 6 75mm sink waste trap 7 Condensate pump
Table 10 Key to Internal condensate disposal methods
6 720 821 670 (2018/06)16
PRE-INSTALLATION
4.3.2 INTERNAL CONNECTIONS
In order to minimise risk of freezing during prolonged cold spells, the following methods of installing condensate drainage pipe should be adopted, in order of priority. Wherever possible, the condensate drainage pipe should be routed and terminated so that the condensate drains away from the appliance under gravity to a suitable internal foul water discharge point such as an internal soil and vent stack. A suitable permanent connection to the foul waste pipe should be used.
1
22mm Ø
2
3
6720644744-06.4Wo
Fig. 9 Disposal to soil vent stack
Alternatively if the first option is not possible an internal kitchen, bathroom or washing machine waste pipe etc. can be used. Ensure that the condensate drain pipe is connected “down stream” of the waste trap.
CONDENSATE PUMP
Where “gravity discharge” to an internal termination is not physically possible, or where very long internal runs would be required to reach a suitable discharge point, condensate should be removed using a proprietary condensate pump, of a specification recommended by the appliance or condensate pump manufacturer. The pump outlet pipe should discharge to a suitable internal foul water discharge point such as an internal soil and vent stack or if not possible to internal kitchen, bathroom or washing machine waste pipe etc. A suitable permanent connection to the foul waste pipe should be used.
2
1
Fig. 11 Condensate pump disposal
22mm Ø
7
3
6720819188-12.2Wo
1
1
Fig. 10 Disposal to a waste pipe
22mm Ø
6
22mm Ø
5
75mm
min.
5
75mm
6
min.
6720819188-03.3Wo
6 720 821 670 (2018/06) 17
PRE-INSTALLATION
6720644744-12.4Wo
9
25mm min.
8
1
7
4.3.3 External connection considerations
NOTICE: Rainwater or external drain disposal
Untreated condensate must not be allowed to flow into streams or rivers ▶ A rainwater down pipe or an external drain shall only
be used for condensate disposal it the down pipe or external drain is connected to a combined foul and rainwater system
▶ Refer to BS 6798 for more information
NOTICE: Grey water systems Contamination of recovered water ▶ Condensate disposal shall not be allowed into a grey
water recovery system that is intended for re-use
NOTICE: Freezing conditions ▶ Pipe work length should be kept to a minimum and the
route as vertical as possible.
▶ When required, use only weather proof insulation.
NOTICE: Condensate waste ▶ Care should be taken when siting a soak-away to avoid
causing damage to existing services.
Continued - Key to condensate illustrations, figures 12, 13, 14 &
15 1 Condensate discharge from appliance 7Condensate pump 8 Pipe work transition 9 Insulate and increase pipe size 10 External rain water pipe into foul water 11 External air break 12 Air gap 13 Strap-on fitting 14 43mm 90 ° male/female bend 15 100mm Ø minimum plastic pipe 16 Drainage holes 17 Limestone chippings 18 Bottom of sealed tube 19 Increase size of soak away with limestones chippings if in clay
soil area
Table 11 Key to external condensate disposal methods
▶ The use of fittings, elbows etc. should be kept to a minimum and any
internal “burrs” on cut pipe work should be removed so that the internal pipe section is as smooth as possible.
FITTING AN EXTERNAL AIR BREAK
• Refer to figure 12 when a rain water down pipe is used to dispose of condensate.
• An air break must be installed in the 43mm pipe work, between the appliance condensate outlet and the drainpipe, outside the property, to avoid flooding during adverse weather conditions.
22mm Ø
1
9
10
11
8
14
Fig. 12 Disposal into a rainwater down pipe
Where the pipe terminates over an open drain or gully, the pipe should terminate below the grating level, but above water level, in order to minimise “wind chill” at the open end.
The use of a drain cover (such as those used to prevent blockage by leaves) may offer further protection from wind chill. Pipe drainage will be improved if the end is cut at 45° as opposed to a straight cut.
12
13
6720810188-05.5
1
11
9
8
Fig. 13 External disposal
25mm min.
6720644744-10.4Wo
Condensate drainage pipe can be run above or below ground. If the pipe work is run under ground, care must be taken to ensure that the pipe work “fall” towards the disposal point is maintained
If no other discharge method is possible then the use of an externally run condensate drainage pipe terminating at a suitable foul water discharge point, or purpose-designed soak away, may be considered. If this method is chosen then the following measures should be adopted: ▶ Use a CondenseSure siphon to help prevent the condensate freezing. ▶ The external run be kept as short as possible and not exceed 3
metres.
▶ The pipe should be run internally as far as possible before going
externally and the pipe diameter should be increased to 32mm before it passes through the wall to the exterior. The pipe should be insulated using suitable waterproof and weather resistant insulation, if not using a CondenseSure siphon.
▶ The external pipe should take the shortest and least exposed route to
the discharge point, and should "fall" as steeply as possible away from the appliance, with no horizontal runs in which condensate might stand.
Fig. 14 Condensate pump to external disposal
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PRE-INSTALLATION
6720819188-06.6Wo
500mm min.
25mm min.
400mm min.
9
16
18
17
19
15
15
16
1
8
11
1
2
3
4
2
3
4
1
2
6720646608-123.1Wo
CONDENSATE SOAK AWAY
• The condensate soak away must be sited at least 500mm away from building footings.
• The condensate drainage pipe may be run above or below the ground to the soak away. The examples shown on this page run above ground.
• The soak away must use a 100mm Ø plastic tube with two rows of three 12mm holes on 25mm centres and 50mm from the bottom of the tube. The holes must face away from the house.
• The tube must be surrounded by at least 100mm of limestone chippings to a depth of 400mm.
Minimum hole size for the condensate soak away m ust be 400mm deep by 300mmØ .
In situations where there are likely to be extremes of temperature or exposure, the use of a proprietary trace-heating system for external pipe work, incorporating an external frost thermostat, should be considered. If such a system is used, the requirement to use 32mm pipe does not apply. However, all other guidance above and the instructions for the trace heating system, should be closely followed.
NOTICE: Unheated internal areas. ▶ Internal pipe runs in unheated areas such as lofts,
basements and garages should be treated as external runs and consideration should be given to using a CondenseSure siphon.

4.4 PRESSURE RELIEF PIPE WORK

NOTICE:
▶ The pressure relief valve is a safety device for the
appliance and if activated may discharge boiling water or steam through the relief valve drain pipe.
▶ Care should be taken when siting the outlet pipe so
that it does not cause an obstruction or discharge above a window, entrance or other public access where it could cause a hazard.
• The pressure relief discharge pipe [1 or 3] should be run in at least 15mm diameter copper pipe or pipe made of a material that will withstand PRV discharge temperatures and pressures and which complies to BS 5252 or BS EN 1451.
• The connection to the PRV must be made in copper pipe. Plastic pipe
work must be properly supported with a maximum of 300mm between supports to prevent sagging and run downwards away from the appliance.
• The pressure relief should discharge away from any electrical or
other hazard, preferably to an external drain or soak away.
• Pipe [1 or 3] should be finished with a partial bend, near the outlet to face the external wall (as shown) to help prevent freezing.
Fig. 16 Pressure relief pipe work
[1] Discharge pipe (turned back onto external wall example)
Fig. 15 To a soakaway
[2] Outside wall [1] Discharge pipe (into drain or gully example) [4] External drain
4.4.1 Alternative PRV connections - Combined PRV/condensate
The PRV or a combined PRV/ condensate discharge can be connected into a suitable internal waste system, the installer must ensure that all the pipe work, including the waste pipe, is capable of withstanding PRV temperatures and pressures.
Worcester, Bosch Group endorses a PRV or a combined PRV/ Condensate internal discharge system, provided that a Hotun hiflo tundish is employed. The tundish is manufactured by RA Tech UK and is WRAS approved, information on the tundish can be found at www.hotun.co.uk.
The guidance of BS 6798 sections 6.3.5 and 6.4.3.2a and RA Tech UK and must be followed.
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PRE-INSTALLATION
6720643895-121.2Wo
+ 30 mm
above elbow
930 mm 410 mm
20 mm* 600 mm**
5 mm
Using 100 mm ue kit 1080 mm
Using 125 mm ue kit 1100 mm
200 mm
5 mm

4.5 APPLIANCE LOCATION AND CLEARANCES

4.5.1 Installation
This appliance is only suitable for installing internally within a property at a suitable location onto a fixed, rigid surface at least the same size as the appliance and capable of supporting the appliance weight.
The appliance must be installed where:
• An engineer can gain clear and safe access to work on the product or component, including making adequate provision for visual inspection of flues in voids.
• The homeowner can gain clear and safe access to the controls, check, top up or reset the appliance.
• Products in loft cavities must have permanent fixed lighting, a permanent fixed retractable ladder and a fixed floor area sufficient to allow access for normal use and servicing directly under and around the product and between and the access hatch.
4.5.2 SERVICING CLEARANCES -
Figure 17 shows the minimum space required to install and service the appliance in a ventilated compartment.
• If a appliance is installed in a compartment with clearances less than
shown in the tables 14, 15, or 16 ventilation is required. Refer to table 12 for ventilation requirements.
Vent position To room or internal
High level Min. free area 122cm2Minimum free area 61cm Low level Min. free area 122cm2Minimum free area 61cm
Table 12 Compartment ventilation
Fig. 17 Ventilated compartment
* Minimum clearance to removable door ** Minimum clearance required for servicing
Table 13 Minimum clearances
No surface protection is required against heat transfer from the appliance.
VENTILATED COMPARTMENT
Direct to outside
space
4.5.3 COMPARTMENTS:
Follow the requirements of BS6798 and BS5440 Part 2 and note:
• Minimum clearances must be maintained.
• An access door is required to install, service and maintain the appliance and any ancillary equipment.
• If the appliance is installed in an unventilated airing/storage cupboard, there is no requirement to make a partition between the appliance and the storage space as long as the minimum clearances around the appliance are maintained.
• Ideally, storage should be below the appliance, where the appliance is mounted in the upper part of the cupboard, whilst maintaining the clearances given in tables 14, 15, or 16.
4.5.4 APPLIANCE CLEARANCES- UNVENTILATED
COMPARTMENTS
The tables below show the options for the minimum space required to install and service the appliance inside an unventilated compartment.
4.5.5 INSTALLATION CLEARANCES - UNVENTILATED
COMPARTMENTS
CAUTION: CLEARANCES
▶ Top and bottom clearances must not be reduced
below the values shown in table 14 as they are the minimum clearances required for servicing.
Unventilated Compartment Installation Clearances (millimetres)
Suggested total unventilated compartment minimum clearances are: Side Above Below Front (to removable door) 400mm 170mm approx.
2
2
Table 14 Minimum unventilated compartment clearances
If Side Clearances are Reduced (millimetres)
If total side clearance is reduced to: (Combined left and right clearances excluding the appliance)
Table 15 Reduced side clearances
If Front Clearance is Reduced (millimetres)
If front clearance (to removable door) is reduced to:
Table 16 Reduced front clearances
(30mm above elbow)
Increase height clearances to (approx.): (Combined top & bottom clearances excluding the
appliance) 350 441 129 300 523 161 250 617 200 200 717 243 150 856 295 100 1012 358
50 1202 434
Increase overall height clearances to (approx.): (Combined top and bottom clearances excluding the
appliance) 50mm 511mm 505mm 25mm 596mm 569mm
200mm 100mm
OR Front clearance
(to removable door) must be
increased to:
OR Increase total side
clearance to: (Combined left and right clearances excluding the appliance)
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4.5.6 ROOMS CONTAINING A BATH OR SHOWER
NOTICE: Any switch or appliance control using mains
electricity must not be within reach of a person using the bath or shower.
• The installation must be in accordance with the latest edition of the IET Wiring Regulations BS7671.
• Circuit breaking devices should be used in accordance with the regulations.
• The diagram is for guidance only.
The appliance must only be installed outside zone 2.
600mm
600mm
600mm
1
1
2*
2250mm
2*
2
2
1
2
PRE-INSTALLATION
A
A
A
6720646608-124.6Wo
Fig. 18 Bathroom installations
[1] Zone 1 [2] Zone 2 [2*] Without the end wall, zone 2 must extend 600mm from the bath [A] 600mm radius from bath or shower
2250mm
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