Concentric Air/Flue Gas Routing Via A Separate Combustion Air Line Inside The Installation Room And Via A Flue With Secondary Ventilation In A Shaft With; Gal-K Set - Buderus Logamax plus GB162 Technical Manual

10 Flue systems for balanced flue operation
10.10 Concentric air/flue gas routing via a separate combustion air line inside the
installation room and via a flue with secondary ventilation in a shaft with GAL-K set
For the Logamax plus GB162 the Buderus GAL-K set is
only permissible in conjunction with the GA-K set
( fig. 151).
Appliance type C
53x
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
GB162-15
GB162-25
GB162-25 T40S
GB162-35
GB162-45
GB162-50
GB162-65
GB162-80
GB162-100
Table 79 Maximum permissible total flue length
( fig. 151)
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 GAL-K set is ideally suited for the modernisation of
older buildings, if the combustion air cannot be drawn in
via the existing chimney shaft (
adequate supply of combustion air from the outside is
safeguarded by the separate ventilation air line in the
installation room.
The ventilation air aperture and the terminal of
the flue shaft must be arranged on the same
side of the building (identical pressure
range).
Maintain the minimum dimensions of the shaft
cross-section to ensure that the free cross-section is
adequate for the secondary ventilation of the flue
( fig. 150).
Minimum dimensions and inspection apertures
Allow for inspection apertures in accordance with
regulations ( page 137).
156
Reduction of the total
length for each
1)
additional pipe
2)
diversion
[m] [m]
50 none
48 L – 1.5
48 L – 1.5
36 L – 1.5
27 L – 1.5
50 L – 1.5
50 L – 1.5
35 L – 1.5
35 L – 1.5
= 2 m, L = 5 m
1 2
page 133). The
120 × 120
Ø 120
A
Fig. 150 Minimum dimensions of the shaft cross-section
for the installation of the flue (dim. in mm)
A Boilers up to 45 kW
For boiler size ≥ 50 kW
B
1)
Required shaft cross-section with system certification for
≤ 1.5 mm surface finish
GAL-K set in conjunction with the GA-K set
GAL-K
1
∅ 125 1)
2) 3)
C
L
2
2)
Fig. 151 Installation version (dim. in mm)
A Flue gas
B Secondary ventilation
C Ventilation air
1)
Ventilation air pipe
2)
For boilers > 35 kW vents or vent to the outside
( tab. 44, page 110)
3) For boilers ≤ 35 kW, an interconnected ventilation air
supply in accordance with DVGW-TRGI 2008 [Germany]
is feasible for the secondary ventilation supply
6 720 645 821 (2010/09) – Logamax plus GB162
140 × 140
1)
, Ø 140 Ø 160
B
6 720 642 463-94.1il
A
GA-K
B B
400
GAL-K
2 3
GA-K
GA-K
L
1
B
6 720 642 463-95 .1il
L