Potterton LPG 50e Installation And Servicing Manual page 5

SITE REQUIREMENTS - Page 5
Where the installation of the boiler will be in an unusual
location, special procedures may be necessary and BS
6798 1987 gives detailed guidance on this aspect.
Ensure that the gas supply pipe and meter if fitted are
installed in accordance with B55482 Part 1. Check that they
are large enough for this appliance and any others that may
be run off the same supply. If in doubt seek advice from the
Propane gas supplier.
Boiler Mounting Surface
The boiler must be mounted on a flat wall, which may be of
combustible material and must be sufficiently robust to take
the weight of the boiler. The requirements of the local
authorities and the Building Regulations must be adhered
to.
IMPORTANT NOTICE:
TIMBER FRAMED HOUSES
If the appliance is to be fitted in a timber framed building, it
should be fitted in accordance with British Gas Publication
Operational Procedures for Customer Service' Part 19. If in'any
doubt, advice should be sought from the local region of British
Gas.
Clearances Around the Boiler
The following minimum clearances must be maintained after
installation, for correct operation and servicing of the boiler:
610mm (2 ft) at the front of the boiler
5mm (0.2 in) each side of the boiler
Balanced Flue Terminal and Ducting
The fresh air inlet and flue ducts can be run from either the
left, right, rear or top of the boiler to a miniature terminal on
the outside of the building.
The minimum spacings from the terminal to obstructions
and ventilation openings are shown in FIG. 3. For infor-
mation appertaining to horizontal flue lengths reference
should be made to FIG. 4.
If a terminal is fitted less than 2m above a balcony, above
ground or above a flat roof to which people have access
then a suitable terminal guard should be fitted. (P.l.L. No.
205792).
Refer to B55440 Part 1 for further guidance.
FIG. 3 THE SITING OF BALANCED FLUE TERMINALS
50mm (2 in) at the top (measured from the top of the boiler
case), except where the optional extra pump cover is to be
fitted, when 178mm (7 in) should be allowed.
100mm (4 in) at the bottom of the boiler.
Additional clearances to these are required during
installation for lifting the boiler and 127mm (5 in) is required
at the top of the boiler for access to the pipe connections.
Ventilation
If the boiler is to be installed in a confined space such as a
cupboard, the space will need ventilating. Openings must
be provided at the top and bottom of the cupboard each of
which should have a free area as shown in TABLE 1.
Further details for installation of a boiler within a
compartment are given in BS 6798 1987.
TABLE 1
PROFILE
50e
60e
80e
If the openings draw air from outside the building the free
areas may be halved. Refer to B55440 Part 2 for further
guidance.
INFORMATION RELATING TO VERTICAL FLUING IS
PROVIDED IN THE PACK CONTAINING THE VERTICAL
FLUE SYSTEM.
NOTE
Where a flue terminal is fitted less than 1000mm from a
plastic or painted gutter or 500mm from painted eaves, an
aluminium shield of 1000mm length should befitted to
underside of gutter or eaves.
Any car port or other add-on extension should consist of a
roof or a roof and one other wall. If it consists of a roof and
two other walls - the installation shall be treated as suspect
and further advice sought.
Position
A DIRECTLY BELOW
WINDOW, AIR VENT, OR ANY OTHER
VENTILATION OEPNING
B BELOW GUTTER, DRAIN/SOIL PIPE
C BELOW EAVES
D BELOW A BALCONY OR CAR PORT ROOF
E FROM VERTICAL DRAIN PIPES AND SOIL
PIPES
F FROM INTERNAL
CORNERS
G ABOVE ADJACENT
BALCONY LEVEL
H FROM A SURFACE
TERMINAL
I FACING TERMINALS
J. FROM OPENING (DOOR/WINDOW) IN
CARPORT INTO DWELLING
K. VERTICALLY FROM A TERMINAL ON THE
SAME WALL
L. HORIZONTALLY FROM A TERMINAL ON
THE SAME WALL
M. ADJACENT TO OPENING
AIR VENT AREAS
2 2
in cm
26 170
32 206
43 277
Minimum Distance
mm
AN OPENABLE
300
25
25
25
75
OR EXTERNAL 25
GROUND OR 300
FACING THE 600
1,200
1,200
1,500
300
150