5
24/28/bi
24/28/bi
24/28/bi
24/28/bi
24/28/bi
This appliance must be installed by a competent
person in accordance with and defined by, the
Standard Specification (Domestic Gas Installa-
tions) Declaration (I.S. 813).
3A.1
RELATED DOCUMENTS
The installation of this boiler must be in accord-
ance with the relevant requirements of the local
building regulations, the current ETCI National
Rules for Electrical Installations, and the bylaws
of the local water undertaking.
It should be in accordance also with any relevant
requirements of the local and/or district authority.
3A.2
LOCATION OF APPLIANCE
The appliance may be installed in any room or
internal space, although particular attention is
drawn to the requirements of the current ETCI
National Rules for Electrical Installations, and I.S.
813, Annex K.
When an appliance is installed in a room or in-
ternal 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 satisfac-
tory flue and termination. The location must also
permit an adequate air supply for combustion pur-
poses and an adequate space for servicing and
air circulation around the appliance. Where the
installation of the appliance will be in an unusual
location special procedures may be necessary,
refer to I.S. 813 for detailed guidance on this
aspect. A compartment used to enclose the
appliance must be designed and constructed
specifically for this pur pose. An existing
compartment/cupboard may be utilised provided
that it is modified to suit.
The appliance can be installed external to a prop-
erty or dwelling provide the installation has been
carried out in accordance with these instructions
and the provisions of I.S. 813.
3A.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 fitted in accordance with I.S. 813. 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 I.S. 813. If the gas supply serves
more than one appliance, it must be ensured that
an adequate supply is maintained to each appli-
ance when they are in use at the same time.
3A.4
FLUE SYSTEM
The terminal should be located where the disper-
sal of combustion products is not impeded and
with due regard for the damage and discoloration
that may occur to building products located nearby.
The terminal must not be located in a place where
it is likely to cause a nuisance (see I.S. 813). In
cold and/or humid weather, water vapour may
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
flat roofs) the terminal must be protected by a
guard of durable material. The guard must be
fitted centrally over the terminal. Refer to I.S.
813, when the terminal is 0.5 metres (or less)
below plastic guttering or 1 metre (or less) below
painted eaves.
3A.5
AIR SUPPLY
The following notes are intended for general
guidance only.
This appliance is a fan-flued boiler, approved for
use with certain Type ‘B’ and Type ‘C’ applica-
tions. Consequently it may require a permanent
air vent for combustion air supply.
Guidance on the requirements for combustion air
and instructions for Type B22 applications can be
found in Section 4.
3A.6
WATER CIRCULATION
Specific recommendations are given in I.S. 813.
The following notes are for general guidance only.
3A.6.1 PIPEWORK
It is recommended that copper tubing be 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 flows 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 atten-
tion should be paid to pipes passing through
ventilated areas such as under floors, loft space,
and void areas.
3A.6.2 AUTOMATIC BY-PASS
The appliance has a built-in automatic by-pass.
However it may be necessary to fit an external
bypass should the design of the heating system
require such. In any case, the design of the
system should be such that it prevents boiler
‘cycling’.
3A.6.3 DRAIN COCKS
These must be located in accessible positions to
facilitate draining of the appliance and all water
pipes connected to the appliance.
3A.6.4 AIR RELEASE POINTS
These must be positioned at the highest points in
the system where air is likely to be trapped. They
should be used to expel trapped air and allow
complete filling of the system.
3A.6.5 EXPANSION VESSEL
The appliance has an integral expansion vessel
to accommodate the increased volume of water
when the system is heated. It can accept up to 8
litres of expansion from within the system, gener-
ally this is sufficient, however if the system has an
unusually high water content, it may be neces-
sary to provide additional expansion capacity
(see 6.19).
3A.6.6 FILLING POINT
An approved method for initial filling of the system
and replacing water lost during servicing etc. is
required (see fig. 5). This method of filling must
comply with local water regulations and/or I.S.
813.