Routing Flue Gas Via Flexible Flues Inside A Shaft With Üb-Flex Set In Conjunction With The Ga Set Or With The Ga-X And Ga-K Sets - Buderus Logamax plus GB162 Technical Manual

9 Flue systems for open flue operation
9.5 Routing flue gas via flexible flues inside a shaft with ÜB-Flex set in conjunction
with the GA set or with the GA-X and GA-K sets
For the Logamax plus GB162 the ÜB-Flex set is only
permissible in conjunction with the GA set or the GA-X
and GA-K sets. The (air)/flue gas line of the ÜB-Flex set in
conjunction with the GA set (appliance type B
formerly B ) or the GA-X and GA-K sets (appliance type
23
B ) has been system-certified together with the
33
Logamax plus GB162 (for ÜB-Flex with GA-X and GA-K
only up to 35 kW), GB162-45 and
GB162-50/65/80/100 (only GA in conjunction with
ÜB-Flex).
Observe the general information on page 108 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 51 Maximum permissible total flue length
( fig. 110)
1) These lengths include the pipe diversions included in the
standard GA-K 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
Subject to the selected combination, the design
information appertaining to the GA set (
page118) or those appertaining to the GA-X set apply in
conjunction with the GA-K set (
the minimum dimensions of the shaft cross-section to
ensure that the free cross-section is adequate for the
secondary ventilation of the flue (
According to the Technical Rules for Gas Installations
DVGW-TRGI 2008 [Germany], the adequate supply of
combustion air in the installation room requires vents
towards the outside with specified cross-sections
( tab. 44, page 110).
Minimum dimensions and inspection apertures
Allow for inspection apertures in accordance with
regulations ( page 114 f.).
122
23P
Reduction of the total
length for each
1)
additional pipe
2)
diversion
[m] [m]
50 L – 1.5
33 L – 1.5
33 L – 1.5
24 L – 1.5
22 L – 1.5
50 L – 1.5
50 L – 1.5
35 L – 1.5
35 L – 1.5
= 2 m
1
page 116 and
page 120). Maintain
fig. 109).
–
A
Fig. 109 Minimum dimensions of the shaft cross-section
for the installation of the flexible flue (dim. in
mm)
A Boilers up to 45 kW
B For boilers from 50 kW to 100 kW (45 kW for DN110)
1)
Required shaft cross-section with system certification for
≤ 1.5 mm surface finish
ÜB-Flex set in conjunction with the GA set or the
GA-X and GA-K sets
Fig. 110 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 (
2)
Air/flue gas concentric
3)
Flexible flue pipe
Special installation room > 50 kW
6 720 645 821 (2010/09) – Logamax plus GB162
120 × 120 140 × 140
∅ 120 1) , ∅ 140
A
≥ 400
B
GA-K GA-X
∅ 80/125
2)
C
1)
C
L 1
1)
B
tab. 44, page 110)
∅ 160
B
6 720 642 463-75.1il
3
B
GA-K
≥ 1000
L
1
3)
DN83
2/4
GA-K
6 720 641 280-54.1il
page 111