Flue systems
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(2010/09)
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11.3 Flue systems for balanced flue
operation
11.3.1 General information for balanced flue
operation
Regulations
In accordance with the DVGW-TRGI 2008 technical rules
[Germany] governing gas installations, the contracted
installer must seek the agreement of the responsible flue
gas inspector prior to commencing work on the flue
system or notify the flue gas inspector of the installation
in writing. In this connection, observe the relevant
national and regional regulations. We recommend asking
the flue gas inspector to confirm participation in writing.
The following are important standards, ordinances,
regulations and directives concerning the sizing and
implementation of flue systems:
•
DIN-EN 483
•
DIN-EN 677
•
DIN-EN 13384-1 and DIN-EN 13384-2
•
DIN 18160-1 and DIN 18160-5
•
Technical rules for gas installations
DVGW-TRGI 2008 [Germany]
•
Landesbauordnung (LBO) [Germany]
•
Muster-Feuerungsverordnung (MuFeuVO) [Germany]
•
Feuerungsverordnung (FeuVO) of the relevant Federal
State [Germany]
General requirements of the installation room
Observe all building regulations and the technical rules
for gas installations applicable to installation rooms
(DVGW-TRGI 2008 [Germany]). The installation room
must be free from the risk of frost.
Where combustion air is concerned, ensure that it is not
heavily contaminated with dust and contains no
halogenated compounds or other corrosive substances.
Otherwise there would be a risk of damage to the burner
and the heat exchanger surfaces.
Halogenated compounds are highly corrosive. These are
contained, for example, in spray cans, thinners, cleaning
& degreasing agents and in solvents. Design the
combustion air supply so that, for example, no extract
air is drawn in from chemical cleaners or paint shops.
Safety clearances towards combustible building
materials
•
Minimum safety clearances towards combustible
building materials are not required.
•
Inflammable and explosive materials and liquids must
not be stored or used in the vicinity of the gas
condensing boiler.
•
At rated output, the maximum surface temperature of
the balanced flue systems and appliances is less than
85 °C. No special measures or safety clearances to
protect flammable materials and furniture are
therefore required.
•
Allow for minimum clearances for maintenance
purposes in accordance with the installation
instructions of the Suprapur boiler.
Installation room for rated output > 50 kW
In accordance with the Muster-Feuerungsverordnung
MuFeuVO [Germany], for gas combustion equipment
with a total rated output in excess of 50 kW, a separate
installation room is required. Variations may apply in
other countries.
For balanced flue operation, this installation room must
meet the following requirements:
•
The installation room must be able to be vented or
ventilation apertures to the outside must be installed
with 1 × 150 cm
2
or 2 × 75 cm
2
clear cross-section.
•
The installation room must not be used for other
purposes, except the following:
–
for the introduction of domestic services
–
for the installation of further combustion
equipment, heat pumps, CHP modules,
permanently fixed internal combustion engines
or
–
for the storage of fuels
•
The installation room must not have any opening to
other rooms except doorways.
•
The doors to the installation room must be tight and
self-closing.
•
All combustion equipment must be able to be shut
down via an emergency stop switch outside the
installation room.
Gas combustion equipment must be
connected to the flue system on the same
floor on which it is installed.
