Conditions For Air Supply And Flue Pipes; Conditions For Fuel - Natural Gas H (Physical Requirements) - Buderus Logano GE434 Maintenance Instructions Manual

Boiler operating conditions for countries outside the EU

12.3 Conditions for air supply and flue pipes

Operating conditions Dimension Boiler output (in case of multi-boiler
Cross-section for the
supply of combustion air
from outside – total
output of all combustion
equipment in kW
Operating conditions
Required flue gas system
draught (negative pressure
inside the flue pipe)
Tab. 25 Air supply and flue pipe
12.4 Conditions for fuel – natural gas H (physical requirements)
Operating conditions
General information
Wobbe index (W )
S
Gross calorific value (H )
S
Relative density
Water content – dewpoint
Dust, mist, liquid
Hydrocarbons – condensing
point
Supply pressure
Static pressure (burner OFF)
Protection against
overpressure upstream of the
boiler
Tab. 26 Fuel – natural gas H (physical requirements)
We reserve the right to make any changes due to technical modifications.
Commissioning and maintenance instructions Logano GE434 Gas-fired special boiler • Issue 02/2003
systems = total output) in kW
2
cm 100 to 150
150 to 200
200 to 250
250 to 300
300 to 350
350 to 400
Dimension
Pa 3 – 30
Dimension
– –
3
kWh/m 12.0 – 16.1
n
3
kWh/m 9.5 – 13.1
n
– 0.55 – 0.75
°C max. + 5
– –
°C –
mbar 17.0 – 25.0
(10.0)
mbar max. 30
mbar max. 100.0
Air supply cross-section in cm
(unrestricted aperture)
Notes – More detailed requirements
Only operate these boilers with a chimney or flue gas system,
which supply the stated draught during operation. Only use non-
flammable materials.
Notes – More detailed requirements
Only use natural gas as fuel. The following are, amongst others,
not permissible:
! Propane:air mixtures
! Sewer gas
! Biogas
! Pit gas
! Methane
W at 0 °C; 1013 hPA
S
Technically free, i.e. a constant operation of gas systems will not
lead to accumulation, which causes reductions in the cross-
section of valves, strainers and filters.
Ground temperature at the respective pipe pressure.
The additional "Gas pressure switch" is required for systems,
where the supply pressure can temporarily fall below 17 mbar.
The stated pressure must not be exceeded in case of faults
caused by a failure of the supply network pressure regulator.
Ensure the protection against overpressure through the
installation of a safety shut-off valve or a safety blow-off valve.
Buderus Heiztechnik GmbH • http://www.heiztechnik.buderus.de
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