10.11 Concentric Air/Flue Gas Routing Via An Air/Flue Gas System With Las-K Set - Buderus Logamax plus GB162 Technical Manual

10 Flue systems for balanced flue operation

10.11 Concentric air/flue gas routing via an air/flue gas system with LAS-K set

Appliance type C
43x
Observe the general information on page 132 ff.
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 81 Maximum permissible total flue length
( fig. 153)
1) The length includes the pipe diversions included in the standard
set; greater lengths may be possible, subject to a calculation by
the manufacturer of the LAS
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
Connection to the air/flue gas system
When connecting the Logamax plus GB162 gas
condensing boilers directly to a chimney, a facing wall of
at least 11.5 mm is required (
Each manufacturer may specify different connections for
linking the concentric air/flue gas line to the LAS chimney.
The GB162 are suitable for connection to an air/flue gas
system operating with negative pressure.
The manufacturer will size the air/flue gas system.
A general building regulations approval from the Institut
für Bautechnik (DIBt) [Germany] must be granted for the
air/flue gas system.
For further information, see the DVGW Code
of Practice G 636 "Gas appliances for
connection to an air/flue gas system
operating with negative pressure
(standardised procedure)."
Inspection apertures
Allow for inspection apertures in accordance with
regulations ( page 137).
158
Reduction of the total
length for each
1)
additional pipe
2)
diversion
[m] [m]
1.4 none
1.4 none
1.4 none
1.4 none
1.4 none
1.4 none
1.4 none
1.4 none
1.4 none
fig. 153).
LAS-K set
4
+
5
3
+
1 2/5
4
L
115
3
+
1 4
Fig. 153 Installation versions (dim. in mm)
A Flue gas
B Ventilation air
1)
Seal supplied by the manufacturer of the LAS
2)
Facing wall for LAS-K only for installation directly to the
LAS with connection at the back
6 720 645 821 (2010/09) – Logamax plus GB162
B A
1)
2)
B A
1)
6 720 641 280-81.1il