7
Mexico Super 100 FF & 125 FF -
Installation
Table 4 - High and low vent areas
Boiler
Air from room/internal
Air direct from
space cm
2
(in.
2
)
outside cm
2
(in.
2
)
High level Low level High level Low level
100 FF
354 (55)
354 (55)
177 (28)
177 (28)
125 FF
438 (68)
438 (68)
219 (34)
219 (34)
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
25 mm ( 1")
3
. Below eaves
25 mm ( 1")
4.
Below balconies or a car port roof
25 mm ( 1")
5.
From vertical drain pipes or soil pipes
25 mm ( 1")
6.
From internal or external corners
25 mm ( 1")
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")
GENERAL
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 is to be installed only on a gas supply with a
governed meter.
A gas meter can only be connected by the local gas supplier or
by a local regional contractor.
Check that the appliance is suitable for the proposed gas
supply. 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
gas pressure of
20 mbar MUST be available at the boiler inlet, with the boiler
operating.
Installation pipes MUST be fitted in accordance with BS. 6891.
Pipework from the meter to the boiler MUST be of an adequate
size. Both 100 FF and 125 FF models should be piped in
22mm minimum. The final metre may be run in 15mm if it is
visible.
The complete installation MUST be tested for gas soundness
and purged as described in the above code.
FLUE INSTALLATION
Some pluming may occur at the termination, so terminal
positions where this could cause a nuisance should be
avoided.
The flue must be installed in accordance with the
recommendations of BS. 5440:1.
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.
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. The minimum
spacing in Table 3, Nos. 2,3, 4, 5 and 6 would be 75mm in
order to allow a terminal guard to be fitted.
Terminals guards are available from boiler suppliers - ask
for Tower Flue Guard, Model K1. In case of difficulty seek
advice from:
Tower Flue Components Ltd.,
Vale Rise, Tonbridge, Kent TN9 1TB (Model K1)
Telephone No. 01732 351 555
Ensure that the guard is fitted centrally.
5.
Where the terminal is fitted within 1000mm (39
1/2
") of a
plastic or painted gutter or 500mm (19
1/2
") of painted
eaves then an aluminium shield at least 1000mm (39
1/2
")
long should be fitted to the underside of the gutter or
painted surface.
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: 1990.
7.
Where it is essential that the terminal wall plate is fitted, i.e.
wall thicknesses over 600mm (23
1/2
") or with an inaccurately
cut hole, the minimum spacing in Table 3 - Nos. 2, 3, 4, 5 & 6
- would be 60mm (2
1/2
") in order to allow the terminal wall
plate to be fitted.
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 'unsafe' and
corrective action taken.
TERMINAL
WARNING.
For top outlet installation (100 FF only) the flue terminal MUST
always be in the horizontal position.
The terminal assembly can be adapted to accommodate
various wall thicknesses. Refer to Frames 7 & 36.
AIR SUPPLY
Detailed recommendations for air supply are given in
BS.5440:2. The following notes are for general guidance:
1.
It is NOT necessary to have a purpose provided 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/compartment, at both high and low levels.
The air vents must either communicate with room/internal
space, or be direct to outside air. The minimum effective
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.
