Technical information

Flue System
The provision for satisfactory flue termination must be made as
described in BS 5440-1.
The appliance must be installed so that the flue terminal is exposed to
outdoor air.
The terminal must not discharge into another room or space such as
an outhouse or lean-to.
It is important that the position of the terminal allows a free passage of
air across it at all times.
The terminal should be located with due regard for the damage or dis-
colouration that might occur on buildings in the vicinity.
In cold or humid weather water vapour may condense on leaving the
flue terminal.
The effect of such “steaming” must be considered.
If the terminal is less than 2 metres above a balcony, above ground or
above a flat roof to which people have access, then a suitable terminal
guard must be fitted. When ordering a terminal guard, quote the appli-
ance model number.
A suitable terminal guard is available from:
TOWER FLUE COMPONENTS
Morley Road
Tonbridge
Kent TN9 1RA
The minimum acceptable spacing from the terminal to obstructions
and ventilation openings are specified in Fig. 2.6
The boiler is designed to be connected to a coaxial flue discharge
system.
TERMINAL POSITION mm
A - Directly below an open window or other opening 300
B - Below gutters, solid pipes or drain pipes 75
C - Below eaves 200
D - Below balconies or car-port roof 200
E - From vertical drain pipes and soil pipes 75
F - From internal or external corners 300
G - Above ground or below balcony level 300
H - From a surface facing a terminal 600
I - From a terminal facing a terminal 1200
J - From an opening in the car port
(e.g. door, window) into dwelling 1200
K - Vertically from a terminal in the same wall 1500
L - Horizontally from a terminal in the same wall 300
A
BC
D
E
F
G
J
K
HI
L
G
F
Fig. 2.6
2.9 Flue Connections
10
400
In addition, it is also possible to use a split
system by fitting a special adapter to the
flue discharge collar and using one of the
apertures for the air vent intake located
on the top part of the combustion cham-
ber (A).
Fig. 2.8
Fig. 2.7
FU010A
FU011A
FU012A