Supplied By www.heating spares.co Tel. 0161 620 6677
5
2.1
STATUTORY REQUIREMENTS
GAS SAFETY (INSTALLATION AND USE) REGULATIONS (as
amended). It is the law that all gas appliances are installed by
a registered person, in accordance with the above regula-
tions. Failure to install appliances correctly could lead to pros-
ecution. 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 IEE Wiring
Regulations (BS 7671), 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 rec-
ommendations in the current editions of the following British
Standards and Codes of Practice: BS5449, BS5546,
BS5440:1, BS5440:2, 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 siting the combination boiler, the following limitations MUST
be observed:
– The boiler is not suitable for external installation. The posi-
tion 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 combination 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 combination 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 16E/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
electricity must be so situated that it cannot be touched
by a person using the bath or shower. Attention is drawn
to the requirements of the current I.E.E. Wiring Regula-
tions (BS 7671), and in Scotland the electrical provisions
of the Building Regulations applicable in Scotland.
– A compartment used to enclose the appliance MUST be
designed and constructed specifically for this purpose. An
existing cupboard, or compartment, may be used provid-
ed it is modified accordingly.
– Where installation will be in an unusual location, special
procedures 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
combustion 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 forced ventilation/air conditioning. If this
does occur, the appliance MUST be turned OFF IMMEDI-
ATELY and the gas supplier consulted.
– The minimum acceptable dimensions from the terminal to
obstructions and ventilation openings are specified in fig. 4.
– 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
roof to which people have access, the terminal MUST be
protected by a purpose designed guard.
– Where the terminal is fitted within 850 mm (34 in) of a
plastic or painted gutter, or 450 mm (18 in) of painted
eaves, an aluminium shield at least 1,500 mm (59 in) long
must be fitted to the underside of the painted surface.
– The air inlet/outlet flue duct MUST NOT be closer than
25 mm (1 in) to combustible material.
– In certain weather conditions the terminal may emit a
plume of steam. This is normal but positions where this
would cause a nuisance should be avoided.
2
GENERAL REQUIREMENTS FOR INSTALLATION
Fig. 4
TABLE 5
Terminal position
Minimum spacing in mm
A
Directly below an openable window,
300
air vent or any other ventilation opening
B
Below guttering, drain pipes or soil pipes
25*
C/D
Below eaves, balconies or carport roof
25*
E
From vertical drain pipes or soil pipes
75
F
From internal or external corners
25
G
Above adjacent ground,
300
roof or balcony level
H
From a surface facing the terminal
600
I
From a terminal facing the terminal
1,200
J
From an opening in the carport
1,200
(e.g. door, window into dwelling)
K
Vertically from a terminal on the same wall
1,500
L
Horizontally from a terminal on the same wall
300
M
Horizontally from a vertical terminal to a wall
300
N
Horizontally from an openable
300
window or other opening
P
Above an openable window or other opening
300
* With “heat shield” installed in accordance to BS 5440 Pt1.
