HDG Navora 20, Operation Manual

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3 Mode of operation – Technical data
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3.3 Technical data
HDG N
AVORA
20/25/30
*Maximum operating temperatures of up to 110 °C can also briefly occur.
Type of boiler HDG Navora 20 HDG Navora 25 HDG Navora 30
Performance data (measured according to DIN EN 303-5)
Nominal thermal power 20 kW 25 kW 30 kW
Minimum thermal power - 20 kW 20 kW
Boiler efficiency at nominal thermal power 91.9 % 91.5 % 91.2 %
Electrical power consumption at nominal
thermal power
82 W 82 W 83 W
Electricity supply
• Voltage
• Frequency
• Back-up fuse
230 V
50 Hz
10 A
General boiler data
Boiler class 3
Maximum permissible operating pressure 3 bar
Maximum supply temperature 95 °C*
Minimum return temperature 60 °C
Water content 168 l
Fuel chamber capacity 150 l
Weight 680 kg
Layout data for flue calculation (DIN EN 13384-1)
Flue gas temperature (Tw) at
• Nominal thermal power
• Minimum thermal power
120 °C
120 °C 150 °C
120 °C 180 °C
120 °C
Flue gas mass flow at
• Nominal thermal power
• Minimum thermal power
0.0140 kg/s
0.0140 kg/s 0.0155 kg/s
0.0140 kg/s 0.0170 kg/s
0.0140 kg/s
CO
2
content at nominal thermal power 14 %
CO
2
content at lowest thermal power 13 %
Flue draught requirement (Pw) 9 Pa
Diameter of flue pipe connection 150 mm
Height at middle of flue pipe connection 900 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 25, inside thread
Recommended minimum pipe dimensions DN 32
Water-side resistance at nominal thermal
power, 10 K
470 Pa 710 Pa 950 Pa
Other information
Combustion duration per filling in terms of
fuel recommendation, approx. Beech: up to 8 h
Spruce: up to 6 h
Beech: up to 7 h
Spruce: up to 5 h
Beech: up to 6 h
Spruce: up to 4 h
Sound pressure level emitted < 70 dB(A)
Min. air inlet cross-section
150 cm
2
Table 3/1 - HDG Navora 20/25/30 technical data