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STORAGE IN A SACK SILO Storing the pellets in a sack silo is another alternative. No changes to
the construction of the building are necessary for this.
Both of these variants are filled from the tanker, just like the pellet
bunker, and are emptied using the HDG vacuum delivery system.
4.2 Connections
CHIMNEY
The benefits of the HDG Pelletmaster 15/25 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.
As, when partially loaded, the flue temperature may lie below 100 °C,
a chimney/flue is required which meets class 1 requirements. If this is
not the case, please contact our service department.
Another essential criterion is to achieve the correct conveying
pressure. This depends on three major factors.
C
HIMNEY CHARACTERISTICS 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.
• Pressure tightness to avoid outside air leaking in. Outside air
would speed up the cooling of the flue gases.
These requirements correspond to chimneys in designs I and II as
specified in DIN 4705 Part 2.
Figure 4/11 - Storage in HDG pellet sack silo
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