Concentric Air/Flue Gas Routing On An Exterior Wall With Gaf-K Set For The Logamax Plus Gb162 Up To 45 Kw - Buderus Logamax plus GB162 Technical Manual

10 Flue systems for balanced flue operation
10.8 Concentric air/flue gas routing on an exterior wall with GAF-K set for the
Logamax plus GB162 up to 45 kW
Appliance type C
53x
Observe the general information on page 132 ff.
Logamax plus Maximum
permissible
total length L
GB162-15
GB162-25
GB162-25 T40S
GB162-35
GB162-45
Table 75 Maximum permissible total flue length
( fig. 146)
1) These lengths include the pipe diversions included in the
standard set; horizontal length L
2) Up to three reductions for additional bends or inspection bends
can be taken into consideration; more than three must be
checked on an individual basis
Adequate combustion air supply
The GAF-K set is ideally suited for the modernisation of
older buildings, if the combustion air cannot be drawn in
via the existing chimney shaft.
To be able to draw in the combustion air at the height of
the wall outlet, the ventilation air tee must be located at
least 30 cm above ground level. Subject to the relevant
geography, the height of snow deposits must also be
taken into account. In any case, air must be drawn in at a
level above the height of snow deposits that can be
expected. Where this condition cannot be met, the
combustion air can alternatively be drawn in via a
concentric ventilation air connector that must be installed
in the air/flue gas line on the wall (
ventilation air).
Minimum dimensions and inspection apertures
Allow for inspection apertures in accordance with
regulations ( page 137).
The flue on the external wall must be at least 20 cm away
from windows. Provide wall mounting brackets every 2 m.
Roof outlet
The air/flue gas line on an external wall can be routed
through the eaves ( fig. 146). This requires the
concentric roof outlet and either an adhesive flat roof
flange or a universal roof tile with rain cap as auxiliary
equipment ( fig. 147, roof outlet).
152
Reduction of the total
length for each
1)
additional pipe
2)
diversion
[m] [m]
21 none
34 L – 1.5
34 L – 1.5
37 L – 1.5
27 L – 1.5
= 2 m
1
fig. 147, alternative
GAF-K set
1 2
∅ 80/125 1)
Fig. 146 Installation version with the GAF-K set (dim. in
mm)
A Flue gas
B Ventilation air
1)
Air/flue gas concentric
2)
Alternative
3)
At ≥ 30 cm (observe the height of snow deposits!)
6 720 645 821 (2010/09) – Logamax plus GB162
A
≥ 400
8
18
17
10
11
12
9
2)
B
2/11 3
7
6
4
≥ 300
L
+
1
5
3)
B
L
1
2)
6 720 642 463-91.1il
L