10.6 Concentric Air/Flue Gas Routing Through A - Buderus Logamax plus GB162 Technical Manual

10 Flue systems for balanced flue operation
10.6 Concentric air/flue gas routing through a flue and shaft with GA-K set (DN110/160)
for the Logamax plus GB162 from 50 kW
Appliance type C (formerly C
93x
Observe the general information on page 132 ff.
Type Shaft dimensions
[mm]
140, Ø 160
150, Ø 170
160, Ø 180
GA-K
170 (140 × 200),
shaft
Ø 190
180, Ø 200
200, Ø 230
Table 71 Maximum permissible total flue length
( fig. 140)
1) These lengths include the pipe diversions included in the
standard set; horizontal length L
length by 1.5 m for every additional pipe diversion and every
tee.
Inspection apertures
Allow for inspection apertures in accordance with
regulations ( page 137).
Adequate combustion air supply
The GA-K set is ideally suited for the modernisation of
older buildings, if combustion air can be drawn in via the
existing chimney shaft (
cleaned by a chimney sweep prior to installing the flue.
Maintain the minimum dimensions of the shaft
cross-section to ensure that the free cross-section is
adequate for drawing in the combustion air (
The secondary ventilation aperture in the shaft must be
omitted.
Shaft terminal in conjunction with combustion
equipment for solid fuel
If the shaft cover of the GA-K set and the chimney terminal
of combustion equipment for solid fuel are side by side,
then ensure that the flue gas from the combustion
equipment for solid fuel cannot be drawn in.
In this case, increase the height of the chimney terminal
for such combustion equipment. In addition, use the
standard GA-K set with stainless steel shaft cover and
terminal pipe ( fig. 139).
If there is a risk of soot fire in the adjacent chimney, the
plastic flue must be at least 50 mm away from the wall of
the adjacent chimney (according to the state combustion
order [Germany]). Where this cannot be ensured, design
the flue using non-combustible materials (e.g. stainless
steel fig. 139) and route it inside the shaft used for the
condensing boiler.
148
)
33x
Maximum permissible total
1)
length L
[m]
GB162- GB162- GB162- GB162-
50 65 80
14 14.5 9
24 22.5 12
25 31 17.5
25 35 22.5
25 35 26
25 35 30.5
= 2 m. Reduce the total
1
page 133). Have the shaft
fig. 139).
A
≥ 50
100
8.5
14
Fig. 139 Minimum dimensions of the shaft cross-section
20.5
and the shaft terminal for the flue (dim. in mm)
26
A Stainless steel shaft cover
B Flue gas from the combustion equipment for solid fuel
30
C Chimney F 90
35.5
D Minimum clearances for chimney F 90
GA-K set
∅ 110/160
Fig. 140 Installation version (dim. in mm)
A Flue gas
B Ventilation air
1)
Flue gas/ventilation air, concentric
2)
400 mm sufficient if the output is restricted to 50 kW
6 720 645 821 (2010/09) – Logamax plus GB162
B
≥ 2 × Dn
Dn
C
140 × 140
D
Ø 160
6 720 642 463-113.1il
A
B
≥ 400
14
3
+
1)
9
1 2
4
L 1
7+8
B
≥ 1000
2)
(15)
L
13
6/16
A
∅ 110
5
6 720 642 463-89.1il