7
combination boiler -
Installation and Servicing
GENERAL
4.
Where the lowest part of the terminal is fitted less than 2m
(6'6") above a balcony, above ground or above a flat roof to
which people have access then the terminal MUST be
protected by a purpose designed guard.
Terminals guards are available from boiler suppliers. Ask
for Tower Flue Guard, Model K6. In case of difficulty seek
advice from:
Grasslin (UK) Ltd.,
Vale Rise, Tonbridge, Kent TN9 1TB
Telephone No. 01732 359 888
Ensure that the guard is fitted centrally.
5.
Where the terminal is fitted within 850mm (34") of a plastic
or painted gutter or 450mm (18") of painted eaves then an
aluminium shield at least 750mm (30") long should be
fitted to the underside of the gutter or painted surface fitted
centrally above the flue.
6.
The air inlet/products outlet duct and the terminal of the
boiler MUST NOT be closer than 25mm (1") to combustible
material. Detailed recommendations on the protection of
combustible material are given in BS. 5440: Part 1, 2000.
IMPORTANT
. It is absolutely essential to ensure, in practice,
that products of combustion discharging from the terminal
cannot re-enter the building or any other adjacent building
through ventilators, windows, doors, other sources of natural
air infiltration, or forced ventilation / air conditioning.
If this should occur the appliance MUST be turned OFF,
labelled as 'unsafe' until corrective action can be taken.
TERMINAL
The terminal assembly can be adapted to accommodate
various wall thicknesses. Refer to Frame 9 - Unpacking.
AIR SUPPLY
Detailed recommendations for all supply are given in BS5440.2
The following notes are for general guidance:
1. It is NOT necessary to have a purpose-povided air vent in the
room or internal space in which the boiler is installed.
2. If the boiler is to be installed in a cupboard or compartment
permanent air vents are required (for cooling purposes) in the
cupboard/comparment, at both high and low levels.
The air vents must either comunicate with room/internal space,
or be direct to outside air. The minimum efective areas of the
permanent air vents, required in the cupboard/compartment,
are specified as follows and are related to maximum rated heat
input.
3. Both air vents MUST communicate with the same room or
internal space or MUST be on the same wall to outside air.
4. In siting the air vents care must be taken to avoid the freezing
of pipework
.
GAS SUPPLY
The local gas supplier should be consulted, at the installation
planning stage, in order to establish the availability of an
adequate supply of gas. An existing service pipe must NOT be
used without prior consultation with the local gas supplier.
The boiler MUST be installed on a gas supply with a governed
meter only.
A gas meter can only be connected by the local gas supplier or
by a registered CORGI engineer.
An existing meter should be checked, preferably by the gas
supplier, to ensure that the meter is adequate to deal with the
rate of gas supply required. A minimum working gas pressure of
20 mbar should be available at the boiler inlet.
Do not use pipes of a smaller size than the boiler inlet gas
connection.
IMPORTANT.
Installation pipes MUST be fitted in accordance with BS. 6891.
Pipework from the meter to the boiler MUST be 22mm O.D.
The complete installation MUST be tested for gas soundness and
purged as described in the above code.
FLUE INSTALLATION
Pluming may occur at the terminal, so where possible, terminal
positions where this could cause a nuisance should be
avoided.
The flue must be installed in accordance with the
recommendations of BS. 5440: Part 1, 2000.
The following notes are intended for general guidance:
1.
The boiler MUST be installed so that the terminal is
exposed to external air.
2.
It is important that the position of the terminal allows the
free passage of air across it at all times.
3.
Minimum acceptable spacing from the terminal to
obstructions and ventilation openings are specified in
Table 3.
Table 3 - Balanced flue terminal position
Terminal Position
Minimum Spacing
1.
Directly below or alongside an
opening window, air vent or other
ventilation opening
300 mm (12")
2.
Below guttering, drain pipes or soil
pipes
75 mm ( 3")
3
.
Below eaves
200 mm
( 8")
4.
Below balconies or a car port roof
200 mm
( 8")
5.
From vertical drain pipes or soil pipes
150 mm
( 6")
6.
From internal or external corners
300 mm ( 12")
7.
Above adjacent ground, roof or
balcony level
300 mm (12")
8.
From a surface facing the terminal
600 mm (24")
9.
From a terminal facing a terminal
1200 mm (48")
10.
From an opening in a car port
(e.g. door or window) into dwelling
1200 mm (48")
11.
Vertically from a terminal on the
same wall
1500 mm (60")
12.
Horizontally from a terminal on the wall
300 mm (12")
Table 4
Europa
24
28
Air from room/internal space
cm ( i n )
2
2
Air direct from outside
265 (41)
310 (48)
133 (21)
155 (24)
c m ( i n )
2
2
