Concentric Air/Flue Gas Routing Through A Flue And Shaft With Ga-K Set (Dn80/125) For The Logamax Plus Gb162 Up To 45 Kw - Buderus Logamax plus GB162 Technical Manual

10 Flue systems for balanced flue operation
10.5 Concentric air/flue gas routing through a flue and shaft with GA-K set (DN80/125)
for the Logamax plus GB162 up to 45 kW
Appliance type C (formerly C
93x
Observe the general information on page 132 ff.
Logamax plus Maximum permissible
total length L
Ø 120 Ø 140
GB162-15 10
GB162-25 15
GB162-25 T40S 15
GB162-35 11
GB162-45 9
horizontal DN80/125, vertical DN110
Ø 160
GB162-45 27
Table 69 Maximum permissible total flue length
( fig. 137)
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 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.
Inspection apertures
Allow for inspection apertures in accordance with
regulations ( page 137).
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. 136).
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
146
)
33x
Reduction of the
1)
total length for
each additional
pipe diversion
[m] [m]
DN80/125
120
10 10 none
17 17 L – 1.5
17 17 L – 1.5
19 16 L – 1.5
15 13 L – 1.5
150
27 L – 1.5
= 2 m
1
page 133). Have the shaft
fig. 136).
order [Germany]). Where this cannot be ensured, design
the flue using non-combustible materials (e.g. stainless
steel fig. 136) and route it inside the shaft used for the
condensing boiler.
2)
A
≥ 50
120 × 120
1)
Ø 120 , Ø 140
Fig. 136 Minimum dimensions of the shaft cross-section
and the shaft terminal for the flue (dim. in mm)
A Stainless steel shaft cover
B Flue gas from the combustion equipment for solid fuel
C Chimney F 90
D Minimum wall thickness for chimney F 90 (L90)
1)
Required shaft cross-section with system certification for
≤ 1.5 mm surface finish
GA-K set
14
∅ 80/125
Fig. 137 Installation version (dim. in mm)
A Flue gas
B Ventilation air
1)
Air/flue gas concentric
6 720 645 821 (2010/09) – Logamax plus GB162
B
≥ 2 × Dn
Dn
C
D
6 720 642 463-86.1il
A
7+8
B B
400
(15)
13
6/16
A
3
∅ 80
+
1)
1 2 9
4
5
L 1
L
6 720 641 280-69.1il