Concentric Air/Flue Gas Routing In Open; Logamax Plus Gb162 Up To 35 Kw; Las Multiple Connection) For The Logamax Plus Gb162 Up To 35 Kw - Buderus Logamax plus GB162 Technical Manual

9 Flue systems for open flue operation
9.4 Concentric air/flue gas routing in open flue operation with GA-X set
in conjunction with GA-K or LAS-K set (LAS multiple connection) for the

Logamax plus GB162 up to 35 kW

Appliance type B
33
Observe the general information on page 108 ff.
Logamax plus Maximum
permissible
total length L
Standard GA-X set in conjunction with GA-K
GB162-15
GB162-25
GB162-25 T40S
GB162-35
Standard GA-X set in conjunction with LAS-K
GB162-15
GB162-25
GB162-25 T40S
GB162-35
Table 49 Maximum permissible total flue length
( fig. 107)
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) Greater lengths are also possible following a calculation by the
LAS manufacturer
4) Values as supplied by the LAS chimney manufacturer
Adequate combustion air supply
When using the GA-X set, flue gas cannot enter the
installation room as the flue is surrounded by combustion
air inside the room. Therefore, this method of routing
air/flue gas is permissible for occupied rooms, subject to
the total output of the open flue combustion equipment
not exceeding 35 kW, and an adequate interconnected
combustion air supply in accordance with DVGW-TRGI
2008, section 5.5. Alternatively, the installation room
requires vents towards the outside (
Minimum dimensions and inspection apertures
Allow for inspection apertures in accordance with
regulations ( page 114 f.).
When using the GA-X set in conjunction with the GA-K
set, maintain minimum dimensions of shaft cross-section
to ensure that the remaining cross-section is adequate for
the secondary ventilation of the flue (
page 150). For further requirements when using the
GA-K set, page 148 ff.
120
Reduction of the total
length for each
1)
additional pipe
diversion
[m] [m]
50 L +L – 1.5
1 2
33 L +L – 1.5
1 2
33 L +L – 1.5
1 2
25 L +L – 1.5
1 2
3)
1.4
3)
1.4
4)
3)
1.4
3)
1.4
= 2 m
1
fig. 107).
fig. 142,
Air/flue gas system
GA-X and LAS-K sets enable multiple appliances to be
connected to a single air/flue gas system. The
manufacturer of the LAS will calculate the required
cross-section. [In Germany] the connection of multiple
appliances requires the permission of the flue gas
inspector.
2)
GA-X set in in conjunction with the GA-K set or
LAS-K
GA-X + GA-K
GA-X + LAS-K
Fig. 107 Installation version (dim. in mm)
A Flue gas
B Secondary ventilation
C Ventilation air
1)
Interconnected combustion air supply to TRGI or vent to
the outside 1 × 150 cm
2)
Air/flue gas concentric
3)
The manufacturer of the LAS will calculate and supply the
required cross-section.
6 720 645 821 (2010/09) – Logamax plus GB162
A
≥ 400
B
GA-K GA-X
)
∅ 80/125 2
1
1)
C
L
1
1)
B
LAS-K GA-X
)
∅ 80/125
2
1
L
1)
C
1)
2
or 2 × 75 cm
GA-K
B
≥ 1000
L
2
A
∅ 80
GA-K
A
3)
6 720 641 280-51.1il
2