Fuels
2
7
Personal dust masks and gloves
must be worn when carrying out
maintenance in the combustion
chamber or the ash collector or on
flue gas-carrying parts and when
emptying the ash container, etc.!
Extra-low-voltage lamps are to be
used
when
carrying
out
maintenance work in the storage
room. Electrical equipment in the
storage room must be designed in
accordance
with
ÖNORM_EN_ISO_20023!
In order to prevent any maintenance errors, if
maintenance is not carried out properly, it is
recommended to be carried out regularly by
authorised personnel or by the HERZ Customer
Service department.
Spare parts must be obtained directly from the
manufacturer or a distribution partner. The
customer will not be exposed to any health risks
as a result of the noise generated by the machine.
Details on the residual risks can be requested
from the residual risk analysis at HERZ if required.
2
FUELS
The HERZ pellets boiler should be operated with
the fuels and their properties which are described
in this chapter.
2.1
Wood pellets
Wood pellets for non-industrial use according to
ENplus,
Swisspellet,
DINplus
resp.
pellets
according
to
EN
17225-2
with
following
specifications:
Property class A1
The maximum permissible fines content in
the fuel storage room must not exceed 8 % of
the fuel volume (determined using a
perforated screen with holes 5 mm in
diameter)!
Fines content at loading: < 1.0 m-%
Calorific value at as-delivered condition > 4.6
kWh/kg
Bulk density (BD) at as-delivered condition >
600 kg/m³
Mechanical Strength (DU), EN 15210-1 at as-
delivered condition in m-
%: DU 97,5 ≥ 97,5
Diameter 6 mm
The nominal power and the emission values can
be guaranteed up to a maximum water content of
25 % and a minimum calorific value of 3.5 kWh/kg
of the permissible fuel.
From a water content of about 25 % and a
calorific value < 3.5 kWh/kg a reduced output is
expected.
Prevent the entering of debris such as stones
or metal particles into the system! Sand and
soil lead to higher level of ash and slagging
precipitation.
There may be a formation of slag according to the
fuel quality, which has to be removed by hand.
In the case of non-compliance, any warranty
or guarantee will be rendered null and void.
The burning of unsuitable fuels could lead to
uncontrolled combustion. Operational faults
and consequential damage are likely to occur.
If a different fuel is named explicitly on the order
respectively the order confirmation, the system
can be operated with the mentioned fuel.
Note: The system is set to the agreed fuel at the
commissioning. This setting (ID-fan speed, fuel,
flow and backflow, cycle times, etc.) should not be
changed when using constant fuel quality.
