3 Mode of operation – Technical data
18
3.3 Technical data
HDG F20/25/30
Type of boiler
HDG F20
HDG F25
HDG F30
Performance data (measured according to DIN EN 303-5)
Nominal thermal power
20 kW
25 kW
30 kW
Minimum thermal power
15 kW
15 kW
15 kW
Boiler efficiency at nominal thermal power
93.8 %
93.4 %
93.0 %
Electrical power consumption at nominal
thermal power
78 W
82 W
85 W
Voltage / frequency
AC 1 x 230 V / 50 Hz
Back-up fuse
10 A
General boiler data
Boiler class
5
Maximum permissible operating pressure
3 bar
Maximum supply temperature
95 °C*
Minimum return temperature
60 °C
Water capacity
125 l
Fuel chamber capacity
155 l
Weight
670 kg
Layout data for flue calculation (DIN EN 13384-1)
Flue gas temperature (Tw) at
Nominal thermal power / lowest thermal
power
120 °C / 120 °C
130 °C / 120 °C
140 °C / 120 °C
Flue gas mass flow at
Nominal thermal power / lowest thermal
power
0.013 /0.010 kg/s
0.013 / 0.010 kg/s
0.013 / 0.010 kg/s
CO
2
content at
Nominal thermal power / lowest thermal
power
14.2 % / 13.3 %
14.2 % / 13.3 %
14.2 % / 13.3 %
Required flue draught (Pw)
10 Pa
10 Pa
10 Pa
Diameter of flue pipe connection
150 mm
Height to centre of flue gas connecting pipe
1040 mm
Water-side connections
Supply and return connections (bushing)
DN 32, inside thread
Safety heat exchanger connections
(bushing)
DN 15, outside thread
Connection for filling/draining (bushing)
DN 15, inside thread
Recommended pipe dimensions (minimum)
DN 32
Water-side resistance at nominal thermal
power
10 K / 20 K
1600 Pa / 400 Pa 2000 Pa / 500 Pa 2400 Pa / 600 Pa
Table 3/1 - HDG F20/25/30 technical data
Summary of Contents for F20
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