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2.6 FLUE TERMINATION POSITION
A.
Below an opening (1)
B.
Above an opening (1)
C.
Horizontally to an opening (1)
D.
Below gutters, soil pipes or drain pipes
E.
Below eves
F.
Below balcony or car port roof
G.
From a vertical drain pipe or soil pipe
H.
From an internal or external corner or to a boundary alongside the terminal
I.
Above ground, roof or balcony level
J.
From a surface or a boundary facing the terminal
K.
From a terminal facing the terminal
L.
From an opening in the car port into the building
M.
Vertically from a terminal on the same wall
N.
Horizontally from a terminal on the same wall
(1)
An opening here means an openable element, such as a openable window, or a fixed opening such as an air vent. However, in addition, the outlet should not
be nearer than 150mm (fanned draught) to an opening into the building fabric formed for the purpose of accommodating a built in element, such as a window frame.
The dimensions given in the table above may need to be increased to avoid wall staining and nuisance depending on site conditions.
GENERAL INSTALLATIONS
All parts of the system must be constructed in accordance with BS 5440 Part 1, except where specifically mentioned in these
instructions.
All pipe work must be adequately supported.
All joints other than approved push-on or plastic compression connectors must be made and sealed with solvent cement suitable
for muPVC pipes and conforming to BS 6209: 1982.
Consideration must be given to Corgi/Gas Safe bulletin TB200/TB008 regarding flues in voids.
The boiler casing must always be correctly fitted to the boiler when leaving the appliance operational.
External wall faces and any internal faces of cavity walls must be good.
AIR SUPPLY
The Keston Combi is a room-sealed appliance and therefore does not require purpose provided ventilation to the boiler room for
combustion air.
COMPARTMENT INSTALLATION
Due to the low casing temperatures generated by the boiler, no compartment ventilation is required. However, the cupboard or
compartment must not be used for storage.
Installation and Servicing
SECTION 2 - INSTALLATION
Twin Flue Positions
boundary
I
H
J
L
boundary
Note. When running flue pipes vertically they MUST be a
minimum of 140mm apart and termination MUST comply
with Section 2.3 and 2.6.
Flue Minimum Spacing
300 mm
300 mm
300 mm
75 mm
200 mm
200 mm
150 mm
300 mm
300 mm
600 mm
1200 mm
1200 mm
1500 mm
300 mm
D, E
B
F
C
A
H
G
I
Air Minimum Spacing
12"
50 mm
12"
50 mm
12"
50 mm
3"
75 mm
8"
50 mm
8"
50 mm
6"
50 mm
12"
50 mm
12"
100 mm
24"
100 mm
48"
1200 mm
48"
100 mm
60"
1500 mm
12"
300 mm
N
M
H
K
2"
2"
2"
3"
2"
2"
2"
2"
4"
4"
48"
4"
60"
12"
21
21
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