40
4.17
BOILER CLEANING
The boiler has to be cleaned regularly and properly, otherwise there is a risk of its wrong
functionality, shortened service life or damage.
Always clean the boiler when it is out of order. It is recommended to turn the exhaust fan on
while cleaning. Detailed description for boiler cleaning is given in the attached „Manual for
correct installation, operation and cleaning the boilers ATTACK DPX“.
The frequency of cleaning the particular boiler parts is given in the table below:
Cleaning*
Daily
Weekly
Annually
Ash removing
1×
Space around the ash tray
1×
Space under the exchanger
1×
Lever of turbulators
5–6×
Flap 1×
Space of the fan
1×
Radial impeller of the fan
1×
* The minimum recommended intervals of cleaning. They can be shorter, according to the
intensity of operation.
ATTENTION
– Regular and proper cleaning is important to ensure the permanent output and
service life of the boiler. The warranty is not valid if the boiler is not sufficiently cleaned and
damaged.
4.18
PRESCRIBED FUEL
The prescribed fuel is dry chopped and log wood with diameter of 80–150 mm, moisture of 12 %
(min.) – 20 % (max.) and heat value 15 – 17 MJ/kg
-1
. It is also possible to burn big pieces of the
wooden waste together with rough wood logs.
Note
The wood logs of higher diameter must be chopped to halves or to quarters (due to the
requirement for the boiler operation at nominal output). It is possible to burn soft or hard wood.
The wood must be dry!
The boiler output depends on the wood moisture. The boiler output and function are ensured
by the max. wood moisture of 20 %. The warranty is not valid if the boiler is operated with the
fuel of higher moisture than 20 %.
Energy content of the most used wood types
Wood
Heat capacity per 1 kg
kcal
MJ
kWh
Spruce 3900
16,25
4,5
Pine 3800
15,80
4,4
Birch 3750
15,50
4,3
Oak 3600
15,10
4,2
Beech
3450
14,40
4,0