6
Mexico Super 440 FF - 480 FF -
Installation
GENERAL
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. 5440-1:2000. In IE refer to I.S. 813:2002.
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
TFC Flue Guard Model K1. In case of difficulty seek advice
from:
Grasslin (UK) Ltd., Tower House, Vale Rise, Tonbridge,
Kent TN9 1TB.
Tel: +44 (0) 1732 359 888. Fax: +44 (0) 1732 354 445
www.tfc-group.co.uk
Ensure that the guard is fitted centrally.
5. 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.5440-1:2000.
In IE refer to
I.S.813:2002.
6. 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 and 6
would be 60mm (2
1/2
") in order to allow the terminal wall
plate to be fitted.
7. The flue assembly shall be so placed or shielded as to
prevent ignition or damage to any part of any building.
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
The terminal assembly can be adapted to accommodate various
wall thicknesses. Refer to Frames 7 and 27.
AIR SUPPLY
Detailed recommendations for air supply are given in
BS.5440:2.
In IE refer to I.S. 813:2002.
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.
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
440 FF
143 (23)
143 (23)
72 (12)
72 (12)
450 FF
173 (27)
173 (27)
87 (14)
87 (14)
460 FF
208 (33)
208 (33)
104 (17)
104 (17)
470 FF
245 (38)
245 (38)
123 (19)
123 (19)
480 FF
282 (44)
282 (44)
141 (22)
141 (22)
WATER CIRCULATION SYSTEM
The boiler must NOT be used for direct hot water supply. The
boiler is suitable for connection to pumped open vent central
heating systems, pumped central heating combined with pumped
or gravity indirect domestic hot water supply systems.
The boiler is NOT suitable for gravity heating systems. The
hydraulic resistances of the boilers at
maximum output with 11ºC
(20ºF) temperature differentials are shown in the graph below.
The central heating system should be in accordance with
BS. 6798 and, in addition, for smallbore and microbore systems,
BS. 5449:1.
The domestic hot water system, if applicable, should be in
accordance with the relevant recommendations of BS. 5546.
Table 3 - Balanced flue terminal position
Approved Manufacturer’s Clearances
Terminal Position
Minimum Spacing
1a. Directly BELOW an opening, air brick,
opening window, etc.
300 mm (12")
1b. Directly ABOVE an opening, air brick,
opening window, etc.
300 mm (12")
1c. HORIZONTALLY to an opening,
air brick,opening window, etc.
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 an internal or external corner or
to a boundary alongside the terminal
25 mm
( 1")
7.
Above adjacent ground, roof or
balcony level
300 mm (12")
8.
From a surface or a boundary
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")
