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Chapter 7
I N S T A L L A T I O N M A N U A L |
7
ATTENTION POINTS FLUE GAS EXTRACTION
To guarantee the fire safety regarding you flue gas configuration a casing
is necessary. For this case non-combustible materials should be used.
Make sure to ventilate a shaft and never to insulate it, to make sure the
hot air is able to get away.
Every transit or terminal should be made such, that the warmth-
insulation and non-combustability is guaranteed, according to the
building regulation.
7�1
DETERMINING THE MAXIMUM FLUE GAS EXTRACTION LENGTH
The fireplaces have a flue diameter of 200/130. You always start with
a vertical length of ½ meter. The maximum
total vertical section
is 22
meters. The flue can be reduced to 150/100 diameter according to the
table in
APPENDIX E
APPENDIX E
.
Calculating the Total Vertical Section (TVS)
You calculate the Total Vertical Section by adding up all vertical upward
sections in the extraction gradation.
Calculating the Total Horizontal Section (THS)
You calculate the Total Horizontal Section by adding up all horizontal
parts in the extraction gradation.
7�1�1
REFERENCE THE FLUE CALCULATION
In order to ascertain whether your intended extraction shall function
properly, a stove category is determined.
After you have determined the applicable category i.e. a wall or a roof
terminal (see
APPENDIX E
APPENDIX E
), you search for the corresponding calculation
tables.
Each category refers to a set of tables:
1.
A table for horizontal outlet.
2.
A table for vertical outlet
3.
A table for reduction to 150/100
You must use the table applicable to you. You calculate your
total
vertical section (TVS)
as well as your
total horizontal section (THS)
. In
the table you will find advice; TVS on the vertical axis and THS on the
horizontal axis.
7�2
BENDS
Be aware of the bends in your flue. They provide extra resistance in the
system and must therefore be included in the TVS and THS.
There are 2 bend types as per the example in
Figure 8.2
:
•
Type N bends: 45° and 90° bends from vertical to horizontal and
vice versa.
•
Type Q bends: 45° and 90° bends from horizontal to horizontal.
The first 3 type N bends (from vertical to horizontal) do not need to be
included in your calculations. The next type N bends are each calculated
as 1 horizontal meter in the THS.
For a type Q bend (horizontal to horizontal) the following applies:
•
90° bend in the horizontal section counts as 2 horizontal meters
in the THS.
•
45° bend in the horizontal section counts as 1 horizontal meter in
the THS
Extraction sections in a 45° upward pipe:
•
45° upward sections are calculated both vertically and horizontally.
Q
R
T
N
S
N
R
Figure 7.6 |
Flue bends examples
R
Horizontal or vertical terminal
N
Bend 45° & 90° vertical to horizontal and vice versa
Q
Bend 45° & 90° horizontal to horizontal
T
Pipe section horizontal
S
Pipe section vertical
Table 7.1 |
