Worcester 24CDi BF Installation And Servicing Instructions Download Page 2

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1.1 Gas Safety (Installation & Use) Regulations 1996 (Amended
1996) : 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, of 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:
BS6798 - Specification for the installation of gas fired hot water
boilers of rated input not exceeding 60kW (Gross).
BS5449 - Central heating for domestic premises.
BS5546:1 - Installation of gas hot water supplies for domestic
purposes.
BS5440/1 - Flues and ventilation for gas appliances of rated input
not exceeding 60kW (Gross): Flues.
BS5440/2 - Flues and ventilation for gas appliances of rated input
not greater than 60kW (Gross): Air supply.
BS6891 - Installation of low pressure gas pipework installations
upto 28mm (R1).
BS6700 - Domestic water supply in buildings.
BS7593 - Water treatment in domestic heating systems.
1.6. To ensure that the installation will perform to the highest
standards, the system and components should conform to any
other relevant standards.
1.7. The appliance and/or components conform, where
applicable, with the Essential Requirements of the Gas Appliance
Directive, the Boiler Efficiency Directive, the EMC Directive and the
Low Voltage Directive.
1.8. In accordance with the requirements of COSSH the appliance
does not contain any substances which are harmful to health.
1.9. 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.
1.10. The advice and instructions given in this document covers,
as far as possible, the foreseeable situations which may arise.
Contact Worcester Heat Systems Technical Department, Telephone:
0990 266241, for advice on specific installations.

2.1. General Information
2.1.1.

The appliance is set to give a maximum output of 24kW

to the domestic hot water and to the heating system. The hot
water flow rate is limited to a nominal 9 l/min at a maximum
temperature rise of 40°C.

2.1.2.

The sanitary water section of the appliance is suitable for

water mains pressures of upto 10bar.

2.2 Electrical Supply

Mains supply: 230V ~ 50 Hz. 140Watts.
External fuse: 3A. Internal fuses: T 2A (F1), and T 1.25A (F2).

2.3 Gas Supply

The boiler requires 2.9m

/h (100ft

/hr) of natural gas (G20) The

gas meter and supply pipes must be capable of supplying this
quantity of gas in addition to the demands of any other
appliances being served.
The meter governor or regulator should deliver a dynamic
pressure of 20mbar (8in wg) at the appliance, which is about
18.5mb at gas valve inlet pressure test point.
The complete installation, including the gas meter, must be
tested for soundness and purged. Refer to BS 6891.

2.4 Packing

The appliance and flue components are packed in separate cartons.

2.5 Installation

The appliance is suitable for indoor installations only.
An open vent feed pipe assembly kit is available.
A wall-spacing frame to allow pipe runs behind the appliance is
available.
An inlet water filter is fitted to the mains cold water inlet on the
appliance.
The appliance is fitted with a system filling link assembly. See
Page 8
The appliance is suitable for connection to a sealed or open
vented primary system.
The specified ventilation openings made into a wall or
compartment door must not be obstructed.
If the appliance is to be fitted into a compartment then the
c o m p a r t m e n t m u s t c o n fo r m to t h e re q u i re m e n t s o f
BS 5440:2:1989.
Do not place anything on top of the appliance.
The clearances specified for servicing must be maintained.
Refer to Fig. 2.