General Requirements (Uk); Related Documents; Location Of Appliance; Gas Supply - Benchmark Procombi A Series Installation & Servicing Instructions Manual

SECTION 3

GENERAL REQUIREMENTS (UK)

This appliance must be installed by a competent
person in accordance with the Gas Safety (In-
stallation & Use) Regulations.
3.1

RELATED DOCUMENTS

The installation of this boiler must be in accord-
ance with the relevant requirements of the Gas
Safety (Installation & Use) Regulations, the local
building regulations, the current I.E.E. wiring regu-
lations, 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
requirements of the local authority and the rel-
evant recommendations 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 requirements of the current I.E.E.
wiring regulations, and in Scotland, the electrical
provisions of the Building Regulations, with re-
spect 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
BS 5440 PART 1
BS 5440 PART 2
BS 5449 PART 1
BS 5546
BS 6798
BS 6891
BS 7074 PART 1
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 servicing 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 specifically for
this purpose. An existing compartment/cupboard
may be utilised provided that it is modified to suit.
Details of essential features of compartment/
cupboard design including airing cupboard instal-
lations 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 fitted 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 sound-
ness 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.
6
3.4
3.5
FLUES
FLUES & VENTILATION
FORCED CIRCULATION HOT WATER SYSTEMS
INSTALLATION OF GAS HOT WATER SUPPLIES FOR DOMESTIC PURPOSES
INSTALLATION OF BOILERS OF RATED INPUT NOT EXCEEDING 60kW
LOW PRESSURE INSTALLATION PIPES
APPLICATION, SELECTION, AND INSTALLTION OF EXPANSION VESSELS
AND ANCILLARY EQUIPMENT FOR SEALED WATER SYSTEMS
3.6
3.6.1
3.6.2
3.6.3
3.6.4

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 fig. 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 flat roofs) the terminal must be
protected by a guard of durable material.
The guard must be fitted centrally over the termi-
nal. 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.

AIR SUPPLY

The following notes are intended for general guid-
ance only. This appliance is a room-sealed, fan-
flued boiler, consequently 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 re-
quired.

WATER CIRCULATION

Detailed recommendations are given in BS 5449
Part 1 and BS 6798. The following notes are for
general guidance only.
PIPEWORK
It is recommended that copper tubing to BS 2871
Part 1 is used in conjunction with soldered capil-
lary 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 pass-
ing through ventilated areas such as under floors,
loft space and void areas.
AUTOMATIC BY-PASS
The appliance has a built-in automatic by-pass,
consequently there is no requirement for an exter-
nal by-pass, however the design of the system
should be such that it prevents boiler 'cycling'.
DRAIN COCKS
These must be located in accessible positions to
facilitate draining of the appliance and all water
pipes connected to the appliance. The drain cocks
must be manufactured in accordance with BS
2879.
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.