Preparation; Preliminary Work With The Help Of A Scale Drawing; Chimney Calculation; Check The Gas Fire And Determine The Location Of The Technical Unit - Kalfire G Series Installation Instructions Manual

4. Preparation

The upcoming sections provide preparatory information prior to
installation of the gas fire:
-

Preliminary work with the help of a scale drawing

-

Chimney calculation

- Check the gas fire and determine the location of the
technical unit
4.1 Preliminary work with the help of a scale drawing
You can use to your advantage a scale drawing prior to and during
the placing of the concentric flue duct system and the gas fire.
Scale drawings are available on the http:/ /www.kalfire.com/en/
fireplaces website. Select the correct gas fire type here. Once you
have made your choice, a page will open on which you will find
"technical information" . The subject " documents " with the scale
drawing of the gas fire can be found there too.
4.2 Chimney calculation
Calculate the concentric flue duct system with the values of the
chimney calculation or make a choice from the configurations in
the appendices. See: flue duct configurations 1 through 6 on
page 35. A chimney calculation is made for the roof pass-through
and the wall pass-through. The chimney calculation is suitable
for gas types G20, G25 and G30. Kalfire cannot guarantee proper
operation of the fireplace if your configuration does not comply
to the chimney calculation.
Table 1: Calculation values chimney calculation
Components
First vertical metre
Second metre and subsequent
vertical metres
1 metre horizontal pipe
1 90° vertical elbow (A)
1 45° vertical elbow
1 90° horizontal elbow (B)
1 45° horizontal elbow
Example of chimney calculation
Used parts
1x 1st vertical metre
1x 2nd vertical metre
2x metre horizontal pipe
2x 90* vertical elbow (A)
1x 90* horizontal elbow (B)
Result:9 + 1 - 2 - 4 - 4 = 0. (This chimney calculation is not
acceptable, it must be at least 0.5)
12
Calculation values Maximum permitted Kalfire G
+9
+1
-1
-2
-1
-4
-2
CAREFUL! Many elbows and/or horizontally-mounted
components of the concentric flue duct system can
create substantial resistance. The flame pattern can vary
considerably because the combustion air cannot easily
reach the gas fire.
A
Fig. 3: Flue duct components
23 metres
7 metres
3 units
6 units
2 units
4 units
Calculation values
+9
+1
-2
-4
-4
WARNING: the sum of all calculation values must be
higher than 0.5. At a value lower than 0.5, the gas fire
will not function according to standard EN613. Deviating
configurations can be presented to Kalfire for written
approval.
B
Maximum permitted Kalfire GP
11 metres
5 metres
3 units
6 units
2 units
4 units
A