12
CTC 380 S
General information
2.6
Connection to chimney
Existing regulations for the design of the chimney must be taken into
consideration. An optimal utilization of the flue gases and with that an
energy-saving operation, requires hereby a mostly optimized adaption
between boiler and burner.
The most important conditions are the following:
• Good thermal insulation in order to as much as possible avoid
temperature losses from the connection between the boiler and
chimney.
• Accurate sealing of the flue gas connections
• Smooth surfaces of the combustion chamber to avoid turbulence.
• Heat-shock resistance as well as water- and steamtight.
According to regulations:
• The boiler must be connected to the chimney with the shortest feasible
flue duct at an angle of 30-45°.
• The flue duct must not be fully inserted through the chimney wall.
• If flue ducts with a cross-sectional dimension which deviate from the
dimension of the flue gas outlet would be used, the connection must
be cone-shaped. Cone angle of maximum 7,5°.
• By the construction of the flue duct between boiler and chimney must
feasible actions be taken to secure that no condensate can flow back
to the boiler (condensate trap).
2.7
Flue gas temperatures
When a new boiler is being connected to an old chimney, the chimney is
often not dimensioned to the new high efficiency of the boiler, which may
easily result in condensation in the chimney depending on lower flue gas
temperatures. In order to ventilate the chimney with warmer boiler room air, a
draught interrupter can be mounted.
All boiler-sizes of the CTC 380 Ecoswiss serie has for the current output-size
design related operational flue gas temperatures. For flue gas temperature
data, see Technical information.
2.8
Hydraulic connection boiler
The dimensioning and plumbing of the system shall be accomplished
according to the measurements in the part Technical information.
2.9
Safety valve boiler
In a closed system, an approved safety valve according to existing
regulations must be mounted.
The max. Operation pressure of the boiler is 3 bars. The connection
pipebetween boiler and safety valve must be constructed in such way
that no pressure increase is possible. The safety valve drain pipe must be
uncovered and visible. Possible exhausting high-temperature hot water must
without danger be removed (Caution! Risk of scalding)
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