Table Of Contents; Installation Regulations; Introduction - Bosch Worcester 15SBi Installation And Servicing Instructions

Contents
1. Installation Regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 2
2. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 2
3. Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 4
4. Siting the Appliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 6
5. Flue Terminal Positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 7
6. Air Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 7
7. Sealed System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 8
8. Domestic Hot Water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 8
9. Gas Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 10
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1. Installation Regulations

1.1 Gas Safety (Installation & Use) Regulations 1998.
It is the law that all gas appliances are installed by a competent
person in accordance with the above regulations. Failure to
install appliances correctly could lead to prosecution. It is in
your interest, and that of safety, to ensure compliance with the
law.
1.2 The manufacturers notes must not be taken, in any way, as
overriding statutory obligations.
1.3 The compliance with a British Standard or European Norm
does not, in itself, confer immunity from legal obligations.
1.4 The installation of the appliance must be in accordance with
the relevant requirements of the Gas Safety Regulations, current
IEE Regulations, Building Regulations, Building Standards
(Scotland) and local water bye-laws.
1.5 The installation should follow the recommendations of the
following British Standards unless otherwise indicated and to
any other relevant standards.
BS5440:1 - Flues and ventilation for gas appliances: Flues
BS5440:2 - Flues and ventilation for gas appliances: Air supply.
BS5449 - Central heating for domestic premises.
BS5482 - Domestic propane gas burning installations.
BS5546:1 - Installation of gas hot water supplies.
BS6700 - Domestic water supply (when relevant).
BS6798 - Installation of gas fired hot water boilers.
BS6891 - Low pressure gas pipework installations up to 28mm
(R1).
BS7593 - Water treatment.
BS7671 - Requirements for electrical installations.
1.6 The appliance and/or components must conform, where
applicable, to all relevant Directives.
1.7 In accordance with COSSH the appliance does not contain
any substances which are harmful to health.
1.8 Product Liability regulations indicate that, in certain
circumstances, the installer can be held responsible, not only for
mistakes on his part but also for damage resulting from the use
of faulty materials. We advise that to avoid any risk, only
quality approved branded fittings are used.
1.9 LPG Installation. The appliance shall not be installed in a
room or internal space below ground level when it is intended for
use with LPG. This does not preclude the installation into rooms
which are basements with respect to one side of the building but
open to the ground on the opposite side.
1.10 These instructions cover, as far as possible, the foreseeable
situations which may arise. Contact Worcester Heat Systems
Technical Department, Telephone: 0990 266241, for advice on
specific installations.
10. Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 10
11. Installing the Appliance . . . . . . . . . . . . . . . . . . . . . . . . . . Page 13
12. Commissioning the Appliance . . . . . . . . . . . . . . . . . . . . Page 19
13. Instructions to the User . . . . . . . . . . . . . . . . . . . . . . . . . . Page 21
14. Inspection and Service . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 21
15. Replacement of Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 21
16. Component Parts List. . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 28
17. Operational Flow Diagrams. . . . . . . . . . . . . . . . . . . . . . . Page 29
18. Fault Finding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 30

2. Introduction

2.1 General Information
The appliance is set to give the mid-range output of 19.5kW
[24SBi] or 10.8kW [15SBi].
Kits are available to convert the appliance from Natural Gas to
Propane operation and vice versa.
2.2 Electrical Supply
230V - 50Hz. Load 180 watts. External fuse 5A, Internal fuse
F1 - 4A.
2.3 Gas supply
The 24SBi appliance requires a maximum of 2.86 m
natural gas (G20) or 1.1 m
The 15SBi appliance requires a maximum of 1.78 m
natural gas (G20) or 0.68 m
The installation and the connection of the gas supply to the
appliance must be in accordance with BS6891.
The meter or regulator should deliver a dynamic pressure of 20
mbar (G20) or 37mbar (G31) at the appliance, which is
equivalent to about 19 mbar or 36 mbar at the gas valve inlet
pressure test point.
Total length of gas supply pipe
3
Gas
1.5
Discharge
8.0
Rate
Gas Discharge
15.9
Rate
3
(m /hr)
(m 3 /hr)
8.7
18.0
2.4 Installation
The appliance is suitable for indoor installation and for use with
a sealed system only and includes a built in filling loop.
If the appliance is fitted in a cupboard or a compartment is built
around it after installation, then the structure must conform with
the requirements of BS6798. However, because of the low casing
losses, there is no need for cooling ventilation openings in the
compartment. The spaces specified for servicing must be
maintained. Refer to Section 6.
An optional wall frame is available to create space for the service
pipes to pass at the back of the appliance.
2.5 Flue
The flue can be to the right, left or rear. A vertical flue system is
available.
An internal flue fitting kit is available. Fitting instructions are
given in Section 11.9.
2.6 Controls
A control knob adjusts the CH temperature and switching.
A facia mounted mechanical clock is available.
Only mains voltage external controls can be used.
A plug- in mid-position diverter valve is available as an optional
extra.
2
3 /h of propane (G31).
3 /h of propane (G31).
(metres)
6 9 12
Propane
- - -
5.2 4.2 3.6
8.8 8.5 7.2
Natural Gas
5.8 4.6 -
12.0 9.4 -
3
/h of
3
/h of
Pipe size
(Ømm)
15
22
28
22
28