Connections; Chimney - HDG Euro 30 Operation Manual

4 Planning and installation – Connections

4.3 Connections

C
HIMNEY CHARACTERISTICS
C
HIMNEY DIMENSIONS
26
C
HIMNEY
According to EN 303-5, the entire flue system must be installed in
such a way that contamination, condensation and insufficient flue
draught are avoided. Here note that, in the accessible operational
area of the boiler, flue gas temperatures of less than 160 K above
room temperature may arise.
✎
The required flue gas values are listed in chapter "3 Mode of
operation", section "3.3 Technical data".
The benefits of the HDG Euro 30/40/45/50 can only be enjoyed if all
of the prerequisites for good combustion are ensured. The heating
system and chimney form a single functional unit and must be
adapted to one another in order to guarantee fault-free and
economical operation.
Since the flue gas temperature may lie below 100°C when the system
is under partial load, a chimney/flue is required which meets the
requirements of DIN EN 13384-1: 2003-03 "Thermal and fluid
dynamic calculation methods". If it does not meet this standard,
contact your specialist heating company or chimney technician.
When planning the flue system, a flue calculation based on DIN EN
13384-1 must be performed by authorised specialists.
Another essential criterion is meeting the flue draught requirement.
This depends on three major factors.
The requirements for minimising the draught loss in the chimney are:
• Good thermal insulation to avoid the flue gases cooling down too
quickly.
• Smooth interior surface to reduce the flow resistance.
• A tight seal of the chimney to avoid outside air leaking in. Air
penetrating from the outside speeds up the cooling of the flue
gases.
These requirements correspond to chimneys of the type conforming
to DIN EN 13384-1: 2003-03 "Thermal and fluid dynamic calculation
methods".
Free-standing chimneys require particularly good insulation.
The system may only be connected to a chimney which has been
dimensioned in accordance with DIN EN 13384-1, taking into
account the fuel planned and the expected load, and which meets
local building regulations for the installation site.
A chimney can only be designed with full knowledge of the on-site
conditions. This includes taking into account the following factors:
• Building location
– Surrounding hills/slopes