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2.1
2.2
2.3
2.4
INSTALLATION REQUIREMENTS
Related Documents
The installation of the heater must be in accordance with
the relevant requirements of the Gas Safety (Installation
and Use) Regulations 1984, Building Regulations, the cur-
rent IEE Wiring Regulations and the Byelaws of the local
water undertaking. It should also be in accordance with
any relevant requirements in British Standard Codes of
Practtce. Detailed recommendations are contained in the
following British Standard Codes of Practice :
BS 6400 : 1985, BS 5546 : 1979, BS 5440 : Pt. 1 : 1990 and BS
5440
: Pt. 2 : 1989.
Location
The location chosen for the appliance must permit the
provision of a satisfactory flue termination. The location
must also permit adequate space for servicing and air cir-
culation around the appliance.
The appliance may be installed in any room or internal
space although particular attention is drawn to the requi-
rements of the IEE Wiring Regulations and, in Scotland,
the electrical provisions of the Building Standards applica-
ble in Scotland, with respect to the installation of a heater
In a room or internal space containing a bath or shower.
Where a room sealed appliance is installed in a room
containing a bath or shower, any electrical switch or ap-
pliance control, utilising mains electricity should be so si-
tuated that it cannot be touched by a person using the
bath or shower.
Where the installation of the appliance will be in an
unusual location special procedures may be necessary
and BS 5546 gives detailed guidance on this aspect.
A compartment.used to enclose the appliance must be
designed and constructed specifically for this purpose. An
existing cupboard or compartment may be used provided
that it is modified for the purpose.
Details of essential features of cupboard/compartment
design are given in BS 5546.
Gas Supply
An adequately sized gas meter must be connected to the
service pipe. Where necessary the local Gas Region of Bri-
tish Gas will arrange for the extsting meter to be checked
or for a suitable meter to be installed. On no account
must any work be carried out on the gas meter other
than by the local Gas Region or their specifically authori-
sed contractor.
Installation pipes should be fitted in accordance with BS
6891 : 1988. Pipework from the meter must be of ade-
quate size. Pipes of a smaller size than the gas connection
should not be used. Gas
supplv
pipes In excess of 3 me-
tres use 22 mm pipe.
The complete installation must be tested for gas sound-
ness and purged in accordance with BS 6891 : 1988.
Siting the Flue Terminal
The flue must be installed in accordance with BS 5440 :
Pt. 1. 1990.
The following notes are intented to give general guidance.
The standard flue set is suitable for walls having a thick-
ness of 75 mm 13 in.) to 612.5 mm (24 in.) for rear outlet
fluing or up to 500 mm (19,5 in.) for side outlet fluing.
Other flue options are available to a maximum of 3 m (9
ft. 8 in.1 to special order.
2.5
2.6
The appliance must be installed so that the flue terminal is
exposed to external air. The appliance must NOT be instal-
led so that the terminal discharges into another room or
space such as an outhouse or lean-to. It is important that
the position of the terminal allows a free passage of air
across it all times. The minimum acceptable spacings from
the terminal to obstructions and ventilation openings are
specified in the following chart. Also see Section 3.4.
Terminal Position
or any other ventilation opening.
Note-Where the terminal is fitted within 850 mm (34 in.)
of a plastic or painted gutter or 450 mm (18 in.) of pain-
ted eaves an aluminium shield of at least 750 mm (30 in.)
long should be fitted to the underside of the gutter or
painted surface.
Where the lowest part of the terminal is less than 2 m.
(6.5 ft) above the level of any ground, balcony, flat roof or
place to which any person has access and which adjoins
the wall in which the terminal is situated must be protec-
ted by a guard of durable material (a terminal guard is
available from Quinnell Barrett & Quinnell. 071 639. 1357.
(GC No 381. 782)
The air inlet/products outlet duct and the terminal of the
appliance must not be closer than 25 mm (1 in.) to any
combustible material. Detailed recommendations on the
protection of combustible material are given in BS 5440
Pt. 1 : 1990.
IMPORTANT NOTICE: TIMBER FRAMED HOUSES. If the
appliance is to be fitted in a timber framed building it
should be fitted in accordance with the British Gas publi-
cation “Guide for Gas Installations in Timber Framed Hou-
sing” reference DM2. If in doubt advice must be sought
from the local Gas Region of British Gas.
Wall Mounting
The appliance should be installed on a flat non-
combustible material which will not reverberate. What
ever the thickness of the wall a hole 107 mm (4.2 in.) in dia-
meter will be required for the appliance flue assembly. It
is recommended that a core drill be used to form this
hole.
For dimensions and clearances see sections 1.2 and 1.3.
Flue Terminal Assembly
The flue may be fitted from inside or outside of the buil-
ding. If fitting from inside the flue duct should be assem-
bled into the air inlet duct and the assembly passed trough
the hole in the wall. The outside diameter of the terminal isu
the same as outside diameter of the air inlet duct.
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