Concentric Air/Flue Gas Routing Through A Flexible Flue And Shaft With Üb-Flex Set In Conjunction With The Ga-K Set - Buderus Logamax plus GB162 Technical Manual

10 Flue systems for balanced flue operation
10.7 Concentric air/flue gas routing through a flexible flue and shaft with ÜB-Flex set in
conjunction with the GA-K set
For the Logamax plus GB162 the ÜB-Flex set is only
permissible in conjunction with the GA-K (
Appliance type C (formerly C
93x
Observe the general information on page 132 ff. as well
as the specific information regarding the standard GA-K
set ( page 146 and page 148).
Logamax plus Maximum permissible
total length L
horizontal DN80/125, vertical DN83
GB162-15 11 (11)
GB162-25 19 (15)
GB162-25 T40S 19 (15)
GB162-35 16 (12)
GB162-45 13 (9)
horizontal DN110/160, vertical DN110
GB162-50
GB162-65
GB162-80
GB162-100
horizontal DN80/125, vertical DN110
GB162-45
Table 73 Maximum permissible total length of the flue
with ÜB-Flex set in conjunction with the GA-K
set ( fig. 143)
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
3) Permissible total length for Ø 120 mm shaft with ≤ 1.5 mm
surface finish
4) For 170 mm x 170 mm (140 mm x 200 mm) shaft. Lengths for
alternative shaft dimensions
Adequate combustion air supply
The ÜB-Flex set in conjunction with the GA-K set is ideally
suited for the modernisation of older buildings with an
offset shaft, if the 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.
150
fig. 143).
)
33x
Reduction of the
1)
total length for each
additional pipe
diversion
[m] [m]
3)
none
3)
L – 1.5
3)
L – 1.5
3)
L – 1.5
3)
L – 1.5
4)
25 L – 1.5
4)
22.7 L – 1.5
4)
20.5 L – 1.5
4)
24 L – 1.5
28 L – 1.5
= 2 m
1
tab. 71, page 148
page 133). Have the shaft
fig. 142).
Minimum dimensions and inspection apertures
Allow for inspection apertures in accordance with
regulations (
2)
A
Fig. 142 Minimum dimensions of the shaft cross-section
for the installation of the flexible flue (dim. in
mm)
A Boilers up to 45 kW
B From boiler size 50 kW
1)
Required shaft cross-section with system certification for
≤ 1.5 mm surface finish
ÜB-Flex set in conjunction with the GA-K set
Fig. 143 Installation version (dim. in mm)
A Flue gas
B Ventilation air
1)
Flexible flue pipe
2)
Air/flue gas concentric
6 720 645 821 (2010/09) – Logamax plus GB162
page 137).
120 × 120 140 × 140
∅ 120 , ∅ 140 ∅ 160
1)
B
A
B
GA-K
GA-K
2)
L
1
6 720 642 463-75.1il
3
B
≥ 400
L
1
1)
DN83
2/4
6 720 642 463-90.1il