12 Installation and maintenance instructions 0020308118_05
VUW 20/26 VUW 25/32 VUW 30/36
Gas flow rate for max. gas volume at 15 °C and 1013 mbar,
G20
2.80 m³/h 3.45 m³/h 3.88 m³/h
Nominal heat output range at 40/30 °C
2.9 to 21.7 kW 4.0 to 26.9 kW 4.3 to 32.9 kW
Nominal heat output range at 50/30 °C
2.8 to 21.2 kW 3.9 to 26.5 kW 4.2 to 32.2 kW
Nominal heat output range at 60/40 °C
2.6 to 20.3 kW 3.6 to 25.6 kW 4.0 to 31.1 kW
Nominal heat output range at 80/60 °C
2.5 to 19.8 kW 3.5 to 24.9 kW 3.7 to 29.9 kW
Max. heat input for heating
20.4 kW 25.5 kW 30.6 kW
Heating min. heat input
2.7 kW 3.7 kW 4.2 kW
Min. flue gas mass flow rate
1.23 g/s
(4.43 kg/h)
1.71 g/s
(6.16 kg/h)
1.94 g/s
(6.98 kg/h)
Max. flue gas mass flow rate
13.26 g/s
(47.74 kg/h)
15.75 g/s
(56.70 kg/h)
18.36 g/s
(66.10 kg/h)
Max. DHW heat output
– – –
DHW nominal heat input
26.5 kW 32.6 kW 36.7 kW
Nominal heat input range for heating
2.7 to 20.4 kW 3.7 to 25.5 kW 4.2 to 30.6 kW
Heating adjustment range
2.7 to 20.4 kW 3.7 to 25.5 kW 4.2 to 30.6 kW
VUW 30/40
Gas connection pressure, G20 natural gas
2.0 kPa
(20.0 mbar)
NOx emission, weighted, G20 (EN 15502-2-1)
26.30 mg/kW⋅h
30% efficiency, G20
109.2 %
Gas flow rate for max. gas volume at 15 °C and 1013 mbar,
G20
4.32 m³/h
Nominal heat output range at 40/30 °C
5.2 to 32.9 kW
Nominal heat output range at 50/30 °C
5.0 to 32.3 kW
Nominal heat output range at 60/40 °C
4.8 to 31.2 kW
Nominal heat output range at 80/60 °C
4.5 to 29.8 kW
Max. heat input for heating
30.6 kW
Heating min. heat input
4.8 kW
Min. flue gas mass flow rate
2.22 g/s
(7.99 kg/h)
Max. flue gas mass flow rate
20.55 g/s
(73.98 kg/h)
Max. DHW heat output
–
DHW nominal heat input
40.8 kW
Nominal heat input range for heating
4.8 to 30.6 kW
Heating adjustment range
4.8 to 30.6 kW
Technical data – G31 output/heat input (depending on the unit version)
VU 10 VU 15 VU 20
Gas connection pressure, G31 liquefied petroleum gas
3.7 kPa
(37.0 mbar)
3.7 kPa
(37.0 mbar)
3.7 kPa
(37.0 mbar)
NOx emission, weighted, G31 (EN 15502-2-1)
35.46 mg/kW⋅h 28.04 mg/kW⋅h 38.75 mg/kW⋅h
Gas flow rate for max. gas volume at 15 °C and 1013 mbar,
G31
0.83 m³/h 0.83 m³/h 1.0 m³/h
Nominal heat output range at 40/30 °C
5.5 to 10.7 kW 5.5 to 16.1 kW 5.5 to 21.2 kW
Nominal heat output range at 50/30 °C
5.4 to 10.3 kW 5.4 to 15.4 kW 5.4 to 20.6 kW
Nominal heat output range at 60/40 °C
5.1 to 9.9 kW 5.1 to 14.8 kW 5.1 to 20.0 kW
Nominal heat output range at 80/60 °C
5.0 to 9.9 kW 5.0 to 14.8 kW 5.0 to 19.8 kW
Max. heat input for heating
10.2 kW 15.3 kW 20.4 kW
Heating min. heat input
5.2 kW 5.2 kW 5.2 kW
Min. flue gas mass flow rate
2.53 g/s
(9.11 kg/h)
2.53 g/s
(9.11 kg/h)
2.53 g/s
(9.11 kg/h)
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