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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.
BS5546:1 - Installation of gas hot water supplies.
BS5482 - Domestic Propane Gas Burning Installations.
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.
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 These instructions cover, as far as possible, the foreseeable
situations which may arise. Contact The Worcester Technical
Department, Telephone: 08705 266241, for advice on specific
installations.
1.10 The appliance shall not be installed into a room or internal
space below ground level when it is intended for use with LPG-
propane (G31). This does not preclude the installation into a
room or space which are basements with respect to one side of
the building but are open to the ground on the opposite side.
The Benchmark initiative is the new code of practice to
encourage the correct installation, commissioning and servicing
of domestic central heating boilers and system equipment.
The ‘checklist’ is a vital document that must be completed by
the installer at the time of installation and handed to the
householder. It confirms that the boiler has been installed and
commissioned according to the manufacturers instructions.
Without the completion of the checklist, manufacturers may refuse
to respond to a call-out from a householder, who will be advised
that he or she must call back the installer, who has not fulfilled his
obligations to record the information required by the initiative.
2.1 General Information
The Worcester boilers provide a heat output of between 9-14kW
(9/14CBi), 14-19kW (14/19CBi) & 19-24kW (19/24 CBi) factory set at
mid-range and contain a temperature control and all the appropriate
safety controls. They are suitable for fully pumped open vent or
sealed systems.
They can be connected to a domestic hot water supply system
through an external S or Y plan system.
2.2 Electrical Supply
230V - 50Hz. Load 125 watts. External fuse 5A to BS 1362, Internal
fuse F1 - 4A.
IP Rating: IP 20.
2.3 Gas supply
The 19/24CBi appliance requires a maximum of 2.72 m
3
/h of
natural gas (G20), 1.05 m
3
/h propane (G31).
The 14/19CBi appliance requires a maximum of 2.18 m
3
/h of
natural gas (G20), 0.84 m
3
/h propane (G31).
The 9/14CBi appliance requires a maximum of 1.62 m
3
/h of
natural gas (G20), 0.63 m
3
/h propane (G31).
The installation and the connection of the gas supply to the
appliance must be in accordance with BS6891or BS5482 for LPG.
The meter or regulator should deliver a dynamic pressure of 20
mbar for natural gas (G20) at the appliance, which is equivalent
to about 19.0 mbar at the gas valve inlet pressure test point, or a
dynamic pressure of 37 mbar for propane (G31) - equivalent to
36.0 mbar at gas valve inlet pressure test point.
2.4 Installation
The appliance is suitable for indoor installation only and for use
with a fully pumped open vent or sealed system with an indirect
cylinder. It is not suitable for use with a direct cylinder.
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. The spaces specified for servicing
must be maintained. Refer to Section 6.
2.5 System
All dirt and system cleanser must be fully flushed from
any system to be connected to the appliance. Refer to Fig. 5,6 and 7.
A system by-pass maybe required dependent on the system which can
take the form of a single uncontrolled radiator located at least 2m from
the boiler - usually in the bathroom. See Section 7 for more details.
The connections in any system must withstand a pressure of up to 3 bar..
Radiator valves must conform to BS2767:10.
2.6 Domestic Hot Water
Single feed direct cylinders are NOT suitable and must not be used.
A HW cylinder must be of the indirect coil type and suitable for
2. Introduction1. Installation Regulations
2
1. Installation Regulations . . . . . . . . . . . . . . . . . . . . . . . . . . Page 2 11. Installing the Appliance . . . . . . . . . . . . . . . . . . . . . . . . . . Page 15
2. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 2 12. Commissioning the Appliance . . . . . . . . . . . . . . . . . . . . Page 23
3. Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 4 13. Instructions to the User . . . . . . . . . . . . . . . . . . . . . . . . . . Page 24
4. Siting the Appliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 6 14. Inspection and Service. . . . . . . . . . . . . . . . . . . . . . . . . . . Page 24
5. Flue Terminal Positions . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 7 15. Replacement of Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 26
6. Air Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 7 16. Conversion Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . Page 32
7. System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 8 17. Component Parts List. . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 33
8. Domestic Hot Water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 8 18. Operational Flow Diagram . . . . . . . . . . . . . . . . . . . . . . . Page 34
9. Gas Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 10 19. Fault Finding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 35
Contents
10. Electrical. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 10