6
SECTION 3 GENERAL REQUIREMENTS (UK)
BS 5440
BS 5440
BS 5449
BS 6798
BS 6891
PART 1
PART 2
PART 1
FLUES
FLUES & VENTILATION
FORCED CIRCULATION HOT WATER SYSTEMS
INSTALLATION OF BOILERS OF RATED INPUT NOT EXCEEDING 60kW
LOW PRESSURE INSTALLATION PIPES
This appliance must be installed by a competent person
in accordance with the Gas Safety (Installation & Use)
Regulations.
3.1 RELATED DOCUMENTS
The installation of this boiler must be in accordance with
the relevant requirements of the Gas Safety (Installation
& Use) Regulations, the local building regulations, the
current I.E.E. wiring regulations, the bylaws of the local
water undertaking, the Building Standards (Scotland)
Regulation, and Building Standards (Northern Ireland)
Regulations.
It should be in accordance also with any relevant re-
quirements of the local authority and the relevant rec-
ommendations of the following British Standard Codes
of Practice.
3.2 LOCATION OF APPLIANCE
The appliance may be installed in any room or internal
space, although particular attention is drawn to the re-
quirements of the current I.E.E. wiring regulations, and in
Scotland, the electrical provisions of the Building Regula-
tions, with respect to the installation of the appliance in
a room or internal space containing a bath or shower.
When an appliance is installed in a room or internal space
containing a bath or shower, the appliance or any control
pertaining to it must not be within reach of a person using
the bath or shower.
The location chosen for the appliance must permit the
provision of a safe and satisfactory fl ue and termination.
The location must also permit an adequate air supply for
combustion purposes and an adequate space for servic-
ing and air circulation around the appliance. Where the
installation of the appliance will be in an unusual location
special procedures may be
Necessary, BS 6798 gives detailed guidance on this
aspect.
A compartment used to enclose the appliance must be
designed and constructed specifi cally for this purpose. An
existing compartment/cupboard may be utilised provided
that it is modifi ed to suit.
Details of essential features of compartment/cupboard
design including airing cupboard installations are given
in BS 6798. This appliance is not suitable for external
installation.
3.3 GAS SUPPLY
The gas meter – as supplied by the gas supplier – must
be checked to ensure that it is of adequate size to deal
with the maximum rated input of all the appliances that
it serves. Installation pipes must be fi tted in accordance
with BS 6891.
Pipe work from the meter to the appliance must be of
adequate size. Pipes of a smaller size than the appliance
gas inlet connection must not be used. The installation
must be tested for soundness in accordance with BS6891.
If the gas supply serves more than one appliance, it must
be ensured that an adequate supply is maintained to
each appliance when they are in use at the same time.
3.4 FLUE SYSTEM
The terminal should be located where the dispersal of
combustion products is not impeded and with due regard
for the damage and discoloration that may occur to build-
ing products located nearby. The terminal must not be
located in a place where it is likely to cause a nuisance
(see fi g. 4).
In cold and/or humid weather, water vapour will condense
on leaving the terminal; the effect of such pluming must
be considered.
If installed less than 2m above a pavement or platform
to which people have access (including balconies or
fl at roofs) the terminal must be protected by a guard of
durable material. The guard must be fi tted centrally over
the terminal.
Refer to BS 5440 Part 1, when the terminal is 0.5 metres
(or less) below plastic guttering or 1 metre (or less) below
painted eaves. metres (or less) below plastic guttering or
1 metre (or less) below painted eaves.
3.5 AIR SUPPLY
The following notes are intended for general guidance only.
This appliance is a room-sealed, fan-fl ued boiler, conse-
quently it does not require a
Permanent air vent for combustion air supply.
When installed in a cupboard or compartment, ventilation
for cooling purposes is also not required.
3.6 WATER CIRCULATION
Detailed recommendations are given in BS 5449 Part 1
and BS 6798. The following notes are for general guid-
ance only.
3.6.1 PIPEWORK
It is recommended that copper tubing to BS 2871 Part
1 is used in conjunction with soldered capillary joints.
Where possible pipes should have a gradient to ensure
air is carried naturally to air release points and that water
fl ows naturally to drain cocks.
Except where providing useful heat, pipes should be
insulated to avoid heat loss and in particular to avoid the
possibility of freezing. Particular attention should be paid
to pipes passing through ventilated areas such as under
fl oors, loft space, and void areas.
