3 Mode of operation – Fuel quality requirements
28
P
RESSED
WOOD
BRIQUETTES
For the HDG Compact 45/50/65/80, pressed wood briquettes can
also be used as fuel. Pressed wood briquettes are pressed shavings,
with or without various forms of additives, with a diameter of more
than 25 mm.
Essential criteria for the definition of the property classes are the
length and diameter, moisture content and ash content of the fuel.
L
ENGTH
AND
DIAMETER
•
D60/L50
The diameter of the pressed wood briquettes must not exceed
60 mm and the length must not exceed 50 mm.
W
ATER
CONTENT
The water content must not exceed a maximum of 12 % (M12) for
property class A1 and a maximum of 15 % (M15) for property class A2
and B.
A
SH
CONTENT
The ideal ash content is a maximum of 1.0% by weight (A1.0) and this
complies with property class A1. When using pressed wood bri-
quettes with a higher ash content (property class A2 and B) sec-
ondary measures (filter technology) may be necessary for complying
with the dust emission values according to the 1st Federal Emission
Control Ordinance (2nd stage).
R
ECOMMENDED
FUEL
It is important that fuel is used according to HGD fuel specifications
in order to be able to guarantee compliance with emission limit
values under the 1st Federal Emission Control Ordinance (2nd stage).
In particular, all fuel requirements concerning size, water content
and ash content must be met. Without the use of secondary meas-
ures (filter technology), only fuels of property class A1 are suitable for
this in each case.
P
ERMITTED
FUEL
IN
ACCORDANCE
WITH
1
ST
F
EDERAL
E
MISSION
C
ONTROL
O
RDINANCE
(G
ERMANY
)
Additional quality requirements apply in Germany independently of
the fuel specification in accordance with DIN EN ISO 17225. In accord-
ance with Section 3 (1) of the 1st Federal Emission Control Ordinance,
Pay particular attention to the fuel quality, both when ordering and
at delivery.
Important!
If there is a significant change of fuel, the system must be reset ac-
cordingly and checked for emissions by authorised specialists.