22
4 217 901 / 02
INSTAllATION
4.3
Exhaust gas connection, exhaust gas
line
Due to the low exhaust gas temperature, condensate
forms in the exhaust gas line and wind protection equip-
ment.
§
The following directives must be complied
with regarding the exhaust gas evacuation:
• DVGW (TRGI)
• ÖVGW
• SVGW/VKF
A exhaust gas temperature limiter as defined
in the aforementioned guidelines is installed
in the boiler.
§
The exhaust gas system must meet the fol-
lowing requirements:
• Gas-tight
• Water-tight
• Acid-resistant
• Approved for exhaust gas temperatures of up
to 120 °C (T 120)
• Approved for overpressure
!
WARNING
The exhaust gas lines must be secured
against unwanted loosening of the plug con-
nections.
Horizontal connecting pipes must be installed
with an inclination of at least 50 mm per metre
of their length installed in the direction of the
boiler to allow free return of condensation wa-
ter towards the boiler. The whole exhaust gas
system must be installed so that condensate
can never collect at any point.
• The cross sections and the maximum
lengths are calculated with reference to dia-
grams or tables. The tables are available from
the exhaust gas line manufacturer. The values
for the calculation can be found in the table
• The exhaust gas conduit cross sections and
lengths are calculated according to the spe-
cified technical data of the boilers.
• Combustion air:
- For airtight operation (optional accesso-
ries), the air duct should have the same
dimensions as the exhaust gas line.
- If the exhaust gas line diameter is larger
than the combustion air line, an individual
calculation must be done.
Standard values for the exhaust gas line dimensions
can be found in the following table:
Table with bases for calculation
• Calculation based on max. 1000 m above sea level.
The first 2 m of the exhaust gas line must be
configured with the same dimension as the
exhaust gas connector, after which the size of
the exhaust gas system can be selected ac-
cording to the table below.
Standard values for the exhaust gas line dimensions
Boiler
Smooth-walled exhaust gas line
Number of 90° bends (exhaust gas + supply air)
Type
Exhaust gas dim. mm
Designation
Total pipe length in m (exhaust gas + supply air)
UltraGas
®
peak load boiler
Inner
DN
1
2
3
4
5 *
(1550)
402
400
50
50
50
50
Notice: The data contained in the “exhaust gas line dimensions” table are standard values.
An exact cal cu lation for the exhaust gas line must be made on site.
* If there are 5 bends or more, the delivery pressure for the supply air/exhaust gas line must be reduced by 30%.
With total pipe lengths exceeding 50 m, a separate calculation is necessary.
Summary of Contents for UltraGas 1550
Page 47: ...47 4 217 901 02...
