Vertical, Concentric Air/Flue Gas Routing Above The Roof With The Do Set (Dn80/125) For Logamax Plus Gb162; Up To 50 Kw - Buderus Logamax plus GB162 Technical Manual

10 Flue systems for balanced flue operation
10.2 Vertical, concentric air/flue gas routing above the roof with the DO set (DN80/125)
for Logamax plus GB162 up to 50 kW
Appliance type C
33x
Observe the general information on page 132 ff.
Logamax plus Maximum
permissible
total length L
[m]
GB162-15
GB162-25
GB162-25 T40S
GB162-35
GB162-45
GB162-50
Table 61 Maximum permissible total flue length
( fig. 122)
1) 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
Air/flue gas line inside a shaft or inside a
protective pipe
In accordance with the Technical Rules for Gas
Installations DVGW-TRGI 2008 [Germany], floors may be
bridged if the air/flue gas line complies with the criteria
described here.
If only the roof structure lies above the installation room,
then encase the air/flue gas line between the upper edge
of the ceiling inside the installation room and the roof skin.
For this, a non-combustible rigid material or a protective
metal pipe ( fig. 122) will suffice. If a level of fire
resistance has been specified for the ceiling, then the
same applies to the casing.
When bridging floors, allow for a shaft with fire resistance
category L 30 (F 30) or L 90 (F 90) for the air/flue gas line
outside the installation room up to the roof skin - except
building categories 1 and 2 with only one utility unit
( "Flue shafts" page 135 and fig. 122). For this, use
only approved shaft structures (by Promat, for example).
Minimum clearances and inspection apertures
Allow for inspection apertures in accordance with
regulations ( page 137). On the roof, maintain minimum
clearances towards windows (
138
Reduction of the total
length for each additional
pipe diversion
[m]
11 none
19 L – 1.5
19 L – 1.5
14 L – 1.5
11 L – 1.5
6 L – 1.5
fig. 125).
DO set
1)
≥ 400
B
4
5
C
9
Fig. 122 Installation versions (dim. in mm)
A Flue gas
B Ventilation air
C Protective cover
1)
Shaft L 30 (F 30) or L 90 (F 90)
Fig. 123 Installation dimensions of the concentric boiler
flue connection (dim. A
Logamax plus
GB162-15/25/35/45
GB162-50
Table 62 Installation dimensions of the concentric boiler
flue connection (
6 720 645 821 (2010/09) – Logamax plus GB162
≥
400
B
A
6
B
1)
8
9
L
3
2
1
1)
6 720 642 463-81.1il
tab. 62)
Dimension A
fig. 123)
A
6
B
8
3
2
1
L
6 720 641 280-60.1il
A
[mm]
≈ 70
≈ 85