41
CAUTION
Once the flue has been installed and the appliance
commissioned, the installer should observe the
plume direction. Particular attention should be
drawn to plume vapour re-entering the boiler via
the air intake. If this occurs, it is highly possible the
flue is fitted within a negative pressure area and
therefore a plume management kit (PMK) must be
fitted.
To reduce the telescopic flue length further:
Separate the telescopic flue, with the terminal end,
mark the length required (min. 130mm) for the term
inal and cut square, taking care not to damage the
tubes.
Remove any burrs and chamfer the outer edge of the
tubes to assist ease of connection and prevent seal
damage. The aluminum tape is not required when
reducing the termi nal to a single section.
7.8.3 PMK terminal positions 60mm
.
Door
Balcony
Boundary
Drainpipe
3
2
4
5
6
1
200
200
100
200
200
200
300
300
300
300
1,200
150
150
150
150
150
600
All measurements in millimetres
Window
Window
25
25
Window
7
Terminal Position
Min. distance
1
600mm distance to a boundary or surface facing a boundary,
unless it will cause a nuisance. BS5440:Part1 recommends that
care is taken when siting terminals in relation to boundaries.
Adjacent to a boundary line.
600mm
300mm
2
Internal/external corners. The air intake clearance can be
reduced to 150 mm providing the flue exhaust outlet has a 300
mm clearance.
(Air) 150mm
(Exhaust) 300mm
3
The flue cannot be lower than 1,000 mm from the top of the
light well due to the build up of combustion products.
1000mm
4 1,200 mm between air intake and facing terminal.
1200mm
5 Clearance no less than 200 mm from the lowest point of the
balcony or overhang.
200mm
6 1,200 mm from an opening in a car port on the same
wall i.e. door or window leading into dwelling.
300mm
7 Balcony kit option.
Using a Plume Management Kit the air intake measurement
can be reduced to 150 mm providing the flue exhaust outlet
has a 300 mm clearance. Plume kits r unning horizontally
must have a 10° fall back to the boiler for proper disposal of
condensate.
For details on specific lengths see relevant boiler Technical &
Specification information.
(Air) 150mm
(Exhaust) 300mm
300 mm minimum clearances to a opening e.g. window.
However the minimum clearance to an opening in direction
that the plume management is facing, must be increased to
1,500 mm.
Where the flue is less than 150 mm to a drain pipe and plume re
direction is used the deflector should not be directe-d towards
the drainpipe.
Installations in
car ports are not
recommended
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