Technical information

12
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 v
er
tical drain pipes and soil pipes 75
F - From internal or external corners 300
G - Above ground or below balcony level 300
H - From a surf
ace 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
M - Horizontally from an opening window 300
N - Fixed by vertical flue terminal
2.9. CONNECTING THE FLUE
FLUE SYSTEM
The provision for satisfactory flue termination must be made as
d
escribed 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.
T
he terminal should be located with due regard for the damage or
discolouration that might occur on buildings in the vicinity, it must
also be located in a place not likely to cause nuisance.
In cold or humid weather water vapour will 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
stainless steel terminal guard must be fitted.
The minimum acceptable spacing from the terminal to obstructions
and ventilation openings are specified in Fig. 2.8.
Note: In cold weather the condensate could cause a safety hazard if
it freezes on pathways or if it results in frost damage to
surfaces and the plume could trigger infra-red security lighting
if sited in the wrong place.
FIG. 2.8
4
Ø 60/100 mm
FIG. 2.9
IM
PORTANT
!
!
BEFORE CONNECTING THE FLUE, ENSURE THAT 1 LITRE OF
WATER HAS BEEN POURED INTO THE EXHAUST CONNECTION TO
FILL THE CONDENSATE TRAP
(FIG.2.7). SHOULD THE TRAP BE
EMPTY THERE IS A TEMPORARY RISK OF FLUE GASSES
E
SCAPING INTO THE ROOM.
FIG. 2.7