Technical data
Boiler
11
The flue gas connection on the boiler does not yet give any indication of the required chimney diameter.
Information on the required chimney diameter can be found in the installation instructions for the boiler in the
Chimney chapter.
Moving-grate boiler
Unit
250 kW
Rated capacity, wood chips M25 BD 150 (W25-S160)
kW
74.9 - 249.9
Rated capacity of pellets
kW
74.9 - 249.9
Efficiency with spruce wood chips at partial/full load
%
92.6 / 92.8
Efficiency with pellets at partial/full load
%
92.4 / 92.7
Retort transport dimensions W x D x H
mm
1375 x 1685 x 1890
Heat exchanger transport dimensions W x D x H
mm
1240 x 1300 x 2210
Weight of the retort
kg
1850
Weight of heat exchanger
kg
1060
Weight of one-chamber rotary valve with stoker
kg
124
Total weight
kg
3144
Water content
litres
540
Water-side pressure drop (∆T = 20K)
Pa / mWs
2400 / 0.24
Flue gas mass flow rate with spruce wood chips at full load
g / s
138
Flue gas mass flow rate with pellets at full load
g / s
140
CO
2
content in dry exhaust gas partial/full load
%
12.5 / 14.7
Exhaust temperature at partial / full load
°C
80 / 130
Required flue draught
Pa
> 5
Carbon monoxide (CO) emissions with wood chips at partial/full
load
mg/MJ
8 / 1
mg/m³
(13% O
2
)
12 / 2
Dust emissions with wood chips at partial/full load
mg/MJ
7 / 7
mg/m³
(13% O
2
)
10 / 10
Unburned hydrocarbon emissions (CxHy) with wood chips at par-
tial/full load
mg/MJ
1.3 / < 2
mg/m³
(13% O
2
)
2 /< 2
Carbon monoxide (CO) emissions with pellets at partial/full load
mg/MJ
21 / 4
mg/m³
(13% O
2
)
31 / 6
Dust emissions with pellets at partial/full load
mg/MJ
5 / 7
mg/m³
(13% O
2
)
8 / 10
Unburned hydrocarbons (CxHy) with pellets at partial/full load
mg/MJ
< 2 / < 2
mg/m³
(13% O
2
)
< 3 / < 2
Electrical power consumption in ready mode
W
19
Maximum permissible operating pressure
bar
6
Temperature adjustment range
°C
70 – 95
Maximum permissible operating temperature
°C
95
Minimum return temperature
°C
60°C for wood chips, 55°C for
pellets
Boiler class
5 acc. to EN 303-5:2012
