Buderus Logamax plus GB162 Technical Manual page 110

9 Flue systems for open flue operation
Installation room conditions
Gas appliances type B
23P
installed in rooms that feature a vent leading to the outside
2
of at least 150 cm or two vents of 75 cm
alternatively lines towards the outside with cross-sections
offering the equivalent flow rate.
2
An additional 2 cm are required for every kilowatt in
excess of 50 kW total rated output.
Logamax plus Cross-section
for a single
vent
[cm
GB162-50
GB162-65
GB162-80
GB162-100
Table 44 Required cross-sections of the vents for the
Logamax plus GB162-50/65/80/100
Wire mesh and grilles must not reduce the required
cross-section.
Gas appliances type B
33
in rooms with or without a door to the outside or a window
that can be opened, independent of the volume of the
room, subject to an adequate supply of combustion air
and correct flue gas routing being ensured
(interconnected room air supply to DVGW-TRGI 2008,
section 9.2.2 [Germany]).
110
(formerly B ) must be
23
2
each;
Cross-section for
two vents
2 2
] [cm ]
150 75
180 90
220 110
250 125
(up to 35 kW) may be installed
Installation room for rated output ≤ 100 kW
No particular installation room is required for operating
the Logamax plus GB162 gas condensing boilers with an
overall rated output of up to 100 kW in open flue mode.
Not permissible in rooms occupied by people is the
installation of the Logamax plus GB162 gas condensing
boiler in conjunction with the GA and GN sets (appliance
type B – formerly B
23P 23
DVGW-TRGI 2008 [Germany].
The installation room must be equipped with vents
towards the outside with the following cross-sections:
• ≤ 50 kW: 1 × 150 cm
• > 50 kW: The vents must be at least 150 cm
2
2 cm for every kilowatt above a total rated output in
excess of 50 kW.
Accordingly, the Logamax plus GB162-65 requires a
combustion vent to the outside with a clear
cross-section of 1 × 180 cm
Permissible in rooms occupied by people, however,
is the installation of the Logamax plus GB162 gas
condensing boiler up to 35 kW in conjunction with the
GA-X set (appliance type B
specified gas condensing boilers lies below 35 kW, and
no flue gases can enter the installation room with air/flue
gas routing via the GA-X set, since the flue inside the
installation room is surrounded by combustion air.
However, an adequate supply of combustion air must be
ensured in compliance with DVGW-TRGI 2008,
section 9.2, via an interconnected combustion air supply.
6 720 645 821 (2010/09) – Logamax plus GB162
) according to
2 2
or 2 × 75 cm
2
plus
2 2
or 2 × 90 cm .
). The output of the
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