Worcester GB162-50 Installation And Servicing Instructions page 7

reducing valves of nominal size up to and including
DN 50 for supply pressures up to and including 12 bar.
BS6880 Code of practice for low temperature hot water heating
systems for output greater than 45 kW.
BS6891 Installation of low pressure gas pipe work up to 35 mm
(R1¼") in domestic premises (2
BS7074:1 Code of practice for domestic and hot water supply.
BS7671 Requirements for Electrical Installations IEE Wiring
Regulations seventeenth edition.
BS EN 303-7 Heating boilers. Gas-fired central heating boilers
equipped with a forced draught burner of nominal heat
output not exceeding 1000 kW.
CISBE Guide Reference sections B7, B11 and B13.
CP 342-2 Code of practice for centralized hot water supply.
Buildings other than individual dwellings.
IGE/UP/2 Gas installation pipework and compressors on
industrial and commercial premises.
IGE/UP/10 Installation of gas appliances in industrial and
commercial premises, part 1: flued appliances.
EN12828 Central heating for domestic premises.
Installation not exceeding 70 kW rated input
BS5440:1 Flues and ventilation for gas appliances of rated
heating not exceeding 70 kW (net): Flues.
BS5440:2 Flues and ventilation for gas appliances of rated
heating not exceeding 70 kW (net): Air Supply.
BS5449 Specification for forced circulation hot water central
heating systems for domestic premises.
BS5546 Installation of gas hot water supplies for domestic
purposes.
BS6798 Installation of gas fired boilers of rated input up to
70 kW (net).
BS7593 Treatment of water in domestic hot water central
heating systems.
BS EN 483 Gas-fired central heating boilers. Type C boilers of
nominal heat input not exceeding 70 kW.
BS EN 677 Gas-fired central heating boilers. Specific
requirements for condensing boilers with a nominal
heat input not exceeding 70 kW.
Installation of rated input greater than 70 kW
BS 6644 Specification for Installation of gas-fired hot water
boilers of rated inputs between 70 kW (net) and
1.8 MW (net) (2
BS EN 15417 Gas-fired central heating boilers. Specific
requirements for condensing boilers with a nominal
heat input greater than 70 kW but not exceeding
1000 kW.
BS EN 15420 Gas-fired central heating boilers. Type C boilers of
nominal heat input exceeding 70 kW, but not
exceeding 1000 kW.
Irish Standards
The relevant Irish standards should be followed, including:
• ECTI National rules for electrical installations
• IS 813:2002 for Domestic Gas Installations.
Health and & Safety Document No. 635.
Ventilation Requirements
BS5440:2 (up to a total boiler rating of 70 kW input).
BS6644 (Total boiler rating of 70 kW to 2000 kW input).
6720813171 (2015/04)
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family gas).
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and 3 family gases).
Key to symbols and safety instructions
The manufacturer's notes must not be taken, in any way, as
overriding statutory obligations.
The design and construction of the Worcester Wall hung gas fired
condensing boiler conforms to the basic specifications listed in the
European directive governing gas-fired appliances 2009/142/EEC, and
with respect to EN 625, EN 483 and EN 677.
Observe the corresponding technical rules and the
building supervisory and statutory regulations when
installing and operating the system.
WARNING: Keep the control unit housing closed when
working on water-bearing components.
• The boiler is designed exclusively for heating water as part of a
central heating system and/or hot-water system.
• For optimum, long-term reliable functioning of the boiler, and in
order to be able to claim under the terms of the manufacturer's
warranty. The boiler must be inspected and maintained at least once
a year (under normal operating conditions) by a Gas Safe / ACS
registered installation and service engineer.
• When instructions are not followed, warranty is invalid.
• Condensing boilers work more efficiently if the return temperature is
as low as possible.
LPG Installations
An appliance using L.P.G. must not be installed in a room or internal
space below ground level unless one side of the building is open to the
ground.
Timber framed building:
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.
Bathroom Installations
This appliance is rated IP X4D.
The boiler may be installed in any room or internal space, although
particular attention is drawn to the requirements of the current IEE
(BS 7671) Wiring Regulations. In Scotland, the electrical provisions of
the building regulations applicable in Scotland, with respect to the
installation of the boiler in a room or internal space containing a bath or
shower.
If the appliance is to be installed in a room containing a bath or shower
then, providing water jets are not going to be used for cleaning purposes
(as in communal baths/showers), the appliance can be installed in Zone
3, as detailed in BS 7671.
Compartment Installations
A compartment used to enclose the boiler should be designed and
constructed especially for this purpose. An existing cupboard or
compartment may be used, provided that it is modified for the purpose.
In both cases, details of essential features of cupboard/compartment
design, including airing cupboard installation, are to conform to the
following: BS 6798 (No cupboard ventilation is required - see 'Air
Supply' for details).
It is not necessary to have a purpose-provided air vent in the room or
internal space in which the boiler is installed. Neither is it necessary to
ventilate a cupboard or compartment in which the boiler is installed, due
to the low surface temperatures of the boiler casing during operation;
therefore the requirements of BS 6798, Clause 12, and BS 5440:2 may
be disregarded.
See for the required service clearances fig. 6 and fig. 7.
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