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1. Installation Requirements
1.1
Gas Supply
The meter and supply pipes must be capable of delivering
this quantity of gas in addition to the demand from any
other appliances in the house and must be governed at
the meter. The pipe diameter required will depend on the
boiler model and the pipe length from the gas meter. On
90 & 100 models, due to the gas flow rate required, 22mm
gas supply pipe should be used up to the inlet connection
of the gas cock on the boiler.
The gas installation should be in accordance with the
relevant standards. In GB this is BS 6891. In IE this is the
current edition of I.S. 813 "Domestic Gas Installations".
1.2
Electricity Supply
230V ~ 50Hz via a fused double pole switch with a contact
separation of at least 3 mm in both poles adjacent to the
boiler. Power consumption is approximately 80W. There
must be only one common isolator for the boiler and its
control system and it must provide complete electrical
isolation. A plug (if fitted) must be accessible to the user
after installation of the appliance.
Fuse the supply at 3 A. The minimum requirement for the
power supply cable is that it should be a PVC sheathed
cord at least 0.75 mm≈ (24 x 0.2 mm) (code designation
HO5 VV-F or HO5 VVH2-F) as specified in table 16 of
BS6500:1984.
External wiring must be correctly earthed, polarised and in
accordance with relevant regulations/rules. In GB this is
the current I.E.E. Wiring Regulations. In IE reference
should be made to the current edition of the ETCI rules.
WARNING: THIS APPLIANCE MUST BE EARTHED.
1.3
Location of Boiler
The boiler is not suitable for external installation. The
boiler must stand firm and level. No special floor protection
is needed, but finishes which soften when warm e.g.
linoleum and plastic floor tiles should be removed or may
be protected by an insulating sheet at least 10mm thick.
The boiler must be installed so that the flue terminal is
exposed to the external air. It is important that the position
of the terminal allows the free passage of air across it at
all times.
The boiler is suitable for installation against a combustible
wall e.g. wood cladding, provided that the flue duct is not
closer than 25 mm to combustible material. A metal sleeve
should be installed to surround the flue duct to provide a
25mm annular space. Further guidance is given in
6
Installation Requirements
BS5440:1:2000, sub-clause 4.4.
If the boiler is to be fitted into a building of timber frame
construction then reference must be made to the current
edition of Institution of Gas Engineers Publication
IGE/UP/7/ (Gas Installation in Timber Framed Housing).
If the boiler is to be fitted in a room containing a bath or
shower reference must be made to the relevant
requirements.
In GB this is the current I.E.E. Wiring Regulations and
Building Regulations.
In IE reference should be made to the current edition of
I.S. 813 "Domestic Gas Installations" and the current ETCI
rules.
CFL boilers must not be installed in bath, shower rooms,
or rooms used as sleeping accommodation.
RSL Models: Where a room-sealed appliance is installed
in a room containing a bath or shower, any electrical
switch or appliance control, utilising mains electricity
should be so situated that it cannot be touched by a
person using the bath or shower.
CFL Models: Conventional flue boilers can be installed
either in a kitchen or utility room or inside a suitably
ventilated, purpose designed or modified compartment.
Where the installation of the boiler will be in an unusual
position, special procedures may be necessary and
BS6798 and BS5546 give detailed guidance on this
aspect.
A compartment used to enclose the boiler must be
designed and constructed specifically for this purpose. An
existing compartment may be used provided that it is
modified for the purpose. Details of essential features of
compartment
design
installations are given in BS6798 and BS5546 and should
be complied with.
RSL Models: If the boiler is fitted under a worksurface it
may be located next to or between kitchen cabinets or
fittings providing that the front of the boiler case is visible
and unobstructed, the special requirements for an
enclosed compartment will not apply
If the boiler is to be fitted under a worksurface, the
worksurface may need to be removed to install the boiler.
It is advisable that the worksurface be removable to allow
access for servicing if required.
If the boiler is to be fitted in a run of kitchen units it is
recommended that the boiler is fitted first or the adjacent
units removed.
including
airing
cupboard
Publication No. 5102977
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