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2.1
STATUTORY REQUIREMENTS
GAS SAFETY [INSTALLATION AND USE REGULATIONS [as
amended]. It is the law that a registered person, in accordan-
ce with the above regulations, installs all gas appliances.
Failure to install appliances correctly could lead to prosecu-
tion. It is in your own interest, and that of safety, to ensure
that the law is complied with.
In addition to the above regulations, this appliance must be
installed in accordance with the current lEE Wiring
Regulations [BS 7871], Local Building Regulations, the
Building Standards [Scotland] [Consolidation] Regulations,
Byelaws of the local water undertaking, and Health and Safety
Document No 635 ‘The Electricity at Work Regulations 1989’.
It should also be in accordance with the relevant recommen-
dations in the current editions of the following British
Standards and Codes of Practice: BS5449, BS5546,
BS5440: 1, B5544O:2, BS6798, BS6891, and BG.DM2,
BS7074, and BS5482 for propane installations.
Manufacturer’s instructions must NOT be taken in any way as
over-riding statutory obligations.
2.2
BOILER POSITION
In sighting the boiler, the following limitations MUST be observed:
The boiler is not suitable for external installation. The position
selected for installation should be within the building, unless
otherwise protected by a suitable enclosure, and MUST allow
adequate space for installation, servicing, and operation of
the appliance, and for air circulation around it [section 2.4].
This position MUST allow for a suitable flue termination to be
made. The boiler must be installed on a flat vertical wall which
is capable of supporting the weight of the appliance, and any
ancillary equipment.
If the boiler is to be fitted in a timber framed building it should
be fitted in accordance with the Institute of Gas Engineers
document for Gas Installations In Timber Frame Housing,
Reference 1SF UP 7:1998. If in doubt, advice must be sought
from the gas supplier.
If the appliance is installed in a room containing a bath or
shower, any electrical switch or control utilising mains electri-
city must be so situated that it cannot be touched by a person
using the bath or shower. Attention is drawn to the require-
ments of the current lEE. Wiring Regulations [BS7871], and in
Scotland the electrical provisions of the Building Regulations
applicable in Scotland.
A compartment used to enclose the appliance MUST be desi-
gned and constructed specifically for this purpose. An existing
cupboard, or compartment, may be used provided it is modi-
fied accordingly.
Where installation will be in an unusual location, special pro-
cedures may be necessary. BS6798 gives detailed guidance
on this aspect.
2.3
FLUE TERMINAL POSITION
Detailed recommendations for flue installation are given in
BS5440: 1. The following notes are for general guidance:
The boiler MUST be installed so that the terminal is exposed
to the external air.
It is important that the position of the terminal allows free
passage of air across it at all times.
It is ESSENTIAL TO ENSURE, in practice that products of com-
bustion discharging from the terminal cannot re-enter the
building, or any other adjacent building, through ventilators,
windows, doors, other sources of natural air infiltration, or for-
ced ventilation air conditioning. If this does occur, the applian-
ce MUST be turned OFF IMMEDIATELY and the gas supplier
consulted.
The minimum acceptable dimensions from the terminal to
obstructions and ventilation openings are specified in fig. 2.
If the terminal discharges into a pathway or passageway
check that combustion products will not cause nuisance and
that the terminal will not obstruct the passageway.
Where the lowest part of the terminal is fitted less than 2 m
[78 in] above ground, above a balcony or above a flat root to
which people have access, the terminal MUST be protected
4
2
GENERAL REQUIREMENTS FOR INSTALLATION
Terminal position
Directly below an openable window, air
vent or any other ventilation opening
Below guttering, drain pipes or soil pipes
Below eaves, balconies or carport roof
From vertical drain pipes or soil pipes
From internal or external corners
Above adjacent ground, roof or bal-
cony level
From a surface facing the terminal
From a terminal facing the terminal
From an opening in the carport (eg
door, window into dwelling)
Vertically from a terminal on the
same wall
Horizontally from a terminal on the
same wall
Adjacent to opening
A
B
C/D
E
F
G
H
I
J
K
L
M
Minimum spacing
300 mm
12 in
75 mm
3 in
200 mm
8 in
75 mm
3 in
300 mm
12 in
300 mm
12 in
600 mm
24 in
1,200 mm
48 in
1,200 mm
48 in
1,500 mm 60 in
300 mm
12 in
300 mm 12 in
TABLE 5
Fig. 2
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