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2. INSTALLATION
2.01 Important notices
Assembly, installation, first start up and maintenance must be carried out by competent persons only, in accordance with
all current technical regulations and directives.
Gas Safety (Installation & Use) Regulations: 1996
In the interest of safety, it is the law that all gas appliances are installed by a competent person in accordance with the
above Regulations, Building Regulations/Building Standards Scotland, Codes of Practice, current I.E.E. Regulations and the
byelaws of the Local Water Undertaking. Failure to comply with the Regulations may lead to prosecution; it is your
responsibility to ensure that the law is complied with.
This appliance must be installed strictly in accordance with these instructions and regulations:
The Gas Safety Regulations (Installations & Use) 1996.
The Local Building Regulations.
The Building Regulations.
The Buildings Standards (Scotland - Consolidated) Regulations.
British Standards Codes of Practice:
B.S.
5440 PART 1
B.S.
5440 PART 2
B.S.
5449 1990 FORCED CIRCULATION HOT WATER SYSTEMS
B.S.
6798 1987 INSTALLATION OF GAS FIRED HOT WATER BOILERS
B.S.
6891 1989 GAS INSTALLATIONS
B.S.
7671 1992 IEE WIRING REGULATIONS
B.S.
4814 1990 SPECIFICATION FOR EXPANSION VESSELS
B.S.
5482 1994 INSTALLATION OF LPG
B.S.
7593 1992 TREATMENT OF WATER IN DOMESTIC HOT WATER CENTRAL HEATING SYSTEMS
Model Water Bye Laws
For Northern Ireland the rules in force apply
N.B. For Northern Ireland the rules in force apply.
Important - If the boiler is to be fitted in a timber framed building it should be fitted in accordance with the institute of
gas engineers publication IGE/UP/1. If in doubt advice should be sought from the Local Gas Region of British Gas Plc.
2.01.01 Location of Boiler
The installation of the Sigma must be on a suitable non-combustible load bearing wall which will provide an adequate fixing
for the boiler mounting bracket assembly. The location should be in an area where the water pipes will not be subjected
to frost conditions. In siting the boiler the following limitations must be observed:
The boiler may be installed in any room or internal space, although particular attention is drawn to the requirements of the
current I.E.E. wiring regulations and 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.
Where a room sealed appliance is installed in a room containing a bath or shower any electrical switch or appliance control
utilising mains electricity must be situated so that it cannot be touched by a person using the bath or shower.
2.01.02 Air Supply
The room or compartment in which the boiler is installed does not require a purpose provided vent when using the standard
concentric flue.
2.01.03 Flue System
The boiler allows the flue outlet to be taken from the rear of the boiler, from either side or vertically.
A standard flue length of 0.75 metres is provided. Alternative lengths of two or three metres can be supplied (equivalent
to wall thicknesses of up to 565, 1815 and 2815mm for rear flues, deduct 91mm plus distance from side wall for side outlet
flues). It is absolutely essential, to ensure that products of combustion discharging from the terminal cannot re-enter the
building, or enter any adjacent building, through ventilations, windows, doors, natural air infiltration or forced ventilation/
air conditioning.
6
Sigma
Flues
Air supply
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