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SECTION 3A
GENERAL REQUIREMENTS (EIRE)
This appliance must be installed by a competent person in
accordance with and defined by, the Standard Specifica-
tion (Domestic Gas Installations) Declaration (I.S. 813).
3A.1 RELATED DOCUMENTS
The installation of this boiler must be in accordance 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 require-
ments 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 re-
quirements of the current ETCI National Rules for Electri-
cal Installations, and I.S. 813, Annex K.
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 flue 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, 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 purpose. An
existing compartment/cupboard may be utilised provided
that it is modified to suit.
This appliance is not suitable for external installation.
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 appliance when they are in use at the same time.
3A.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 I.S. 813).
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
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 room-sealed, fan-flued boiler, con-
sequently 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.
3A.6 WATER CIRCULATION
Specific recommendations are given in I.S. 813. The fol-
lowing notes are for general guidance only.
3A.6.1 PIPEWORK
It is recommended that copper tubing be used in conjunc-
tion 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 attention should be paid
to pipes passing through ventilated areas such as under
floors, loft space, and void areas.
3A.6.2 AUTOMATIC BY-PASS
Vokera recommend that an automatic bypass is installed
to ensure the required minimum flow-rate is achieved at
all times. Additionally, the design of the system and its
controls should ensure that an adequate temperature
differential is met, and 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.7 ELECTRICAL SUPPLY
The appliance is supplied for operation on 230V @ 50Hz
electrical supply; it must be protected with a 3-amp fuse.
The method of connection to the mains electricity supply
must allow for complete isolation from the supply. The
preferred method is by using a double-pole switch with
a contact separation of at least 3mm. The switch must
only supply the appliance and its corresponding controls,
i.e. time clock, room thermostat, etc.
3A.8 MOUNTING ON A COMBUSTIBLE SURFACE
If the appliance is to be fitted on a wall of combustible
material, a sheet of fireproof material must protect the wall.
3A.9 TIMBER FRAMED BUILDINGS
If the appliance is to be fitted in a timber framed building,
it should be fitted in accordance with I.S. 813 and local
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