Concentric Air/Flue Gas Routing On An Exterior Wall With Gaf-K Set For The Logamax Plus Gb162 From 50 Kw - Buderus Logamax plus GB162 Technical Manual

10 Flue systems for balanced flue operation
10.9 Concentric air/flue gas routing on an exterior wall with GAF-K set for the
Logamax plus GB162 from 50 kW
Appliance type C
53x
Observe the general information on page 132 ff. The
Logamax plus GB162-50/65/80/100 requires a specific
installation room, according to
Muster-Feuerungsverordnung [Germany], if the output
has not been restricted to 50 kW (
Logamax plus Maximum
permissible
total length
L
[m]
GB162-50
GB162-65
GB162-80
GB162-100
Table 77 Maximum permissible total flue length
( fig. 148)
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).
154
page 132).
Reduction of the total
length for each
additional pipe
1) 2)
diversion
[m]
50 L – 1.5
50 L – 1.5
35 L – 1.5
35 L – 1.5
= 2 m
1
fig. 149, alternative
Minimum dimensions and inspection apertures
Allow for inspection apertures in accordance with
regulations ( page 137). The flue on the exterior wall
must be at least 20 cm away from windows. Provide wall
spacers every 2 m.
Roof outlet
The air/flue gas line on an external wall can be routed
through the eaves ( fig. 148). This requires the
concentric roof outlet and either an adhesive flat roof
flange or a universal roof tile with cowl as additional
equipment ( fig. 149, roof outlet).
GAF-K set
≥ 400
∅ 110/160
1 2
Fig. 148 Installation version (dim. in mm)
A Flue gas
B Ventilation air
1)
400 mm sufficient if the output is restricted to 50 kW
2)
Alternative
3) Ventilation air: ≥ at 30 cm (observe the height of snow
deposits!)
4)
Stainless steel
6 720 645 821 (2010/09) – Logamax plus GB162
A
8
≥ 1000
1)
11
17
16
10
11
∅ 110/160
9
2)
B
11 3
7
6
B
4
L 1
+
2) 5
3)
L 1
6 720 642 463-92.1il
L
L
12
4)