0020308118_05 Installation and maintenance instructions 13
VU 10 VU 15 VU 20
Max. flue gas mass flow rate
9.78 g/s
(35.21 kg/h)
9.78 g/s
(35.21 kg/h)
11.99 g/s
(43.16 kg/h)
Max. DHW heat output
19.5 kW 19.5 kW 23.3 kW
DHW nominal heat input
20.4 kW 20.4 kW 24.5 kW
Nominal heat input range for heating
5.2 to 10.2 kW 5.2 to 15.3 kW 5.2 to 20.4 kW
Heating adjustment range
10.2 kW (auto) 5.2 to 15.3 kW 5.2 to 20.4 kW
VU 25 VU 30 VUW 20/26
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)
25.44 mg/kW⋅h 25.33 mg/kW⋅h 38.75 mg/kW⋅h
Gas flow rate for max. gas volume at 15 °C and 1013 mbar,
G31
1.25 m³/h 1.45 m³/h 1.07 m³/h
Nominal heat output range at 40/30 °C
8.6 to 26.7 kW 8.6 to 31.8 kW 5.5 to 21.2 kW
Nominal heat output range at 50/30 °C
8.2 to 26.2 kW 8.2 to 31.3 kW 5.4 to 20.6 kW
Nominal heat output range at 60/40 °C
8.0 to 25.2 kW 8.0 to 30.3 kW 5.1 to 20.0 kW
Nominal heat output range at 80/60 °C
8.0 to 24.6 kW 8.0 to 29.5 kW 5.0 to 19.8 kW
Max. heat input for heating
25.5 kW 30.6 kW 20.4 kW
Heating min. heat input
8.2 kW 8.2 kW 5.2 kW
Min. flue gas mass flow rate
4.10 g/s
(14.76 kg/h)
4.10 g/s
(14.76 kg/h)
2.53 g/s
(9.11 kg/h)
Max. flue gas mass flow rate
15.08 g/s
(54.29 kg/h)
17.85 g/s
(64.26 kg/h)
12.82 g/s
(46.15 kg/h)
Max. DHW heat output
29.5 kW 34.2 kW –
DHW nominal heat input
30.6 kW 35.5 kW 26.2 kW
Nominal heat input range for heating
8.2 to 25.5 kW 8.2 to 30.6 kW 5.2 to 20.4 kW
Heating adjustment range
8.2 to 25.5 kW 8.2 to 30.6 kW 5.2 to 20.4 kW
VUW 25/32 VUW 30/36
Gas connection pressure, G31 liquefied petroleum gas
3.7 kPa
(37.0 mbar)
3.7 kPa
(37.0 mbar)
NOx emission, weighted, G31 (EN 15502-2-1)
25.44 mg/kW⋅h 25.33 mg/kW⋅h
Gas flow rate for max. gas volume at 15 °C and 1013 mbar,
G31
1.33 m³/h 1.45 m³/h
Nominal heat output range at 40/30 °C
8.6 to 26.7 kW 8.6 to 31.8 kW
Nominal heat output range at 50/30 °C
8.2 to 26.2 kW 8.2 to 31.3 kW
Nominal heat output range at 60/40 °C
8.0 to 25.2 kW 8.0 to 30.3 kW
Nominal heat output range at 80/60 °C
8.0 to 24.6 kW 8.0 to 29.5 kW
Max. heat input for heating
25.5 kW 30.6 kW
Heating min. heat input
8.2 kW 8.2 kW
Min. flue gas mass flow rate
4.10 g/s
(14.76 kg/h)
4.10 g/s
(14.76 kg/h)
Max. flue gas mass flow rate
16.06 g/s
(57.82 kg/h)
17.85 g/s
(64.26 kg/h)
Max. DHW heat output
– –
DHW nominal heat input
32.6 kW 35.5 kW
Nominal heat input range for heating
8.2 to 25.5 kW 8.2 to 30.6 kW
Heating adjustment range
8.2 to 25.5 kW 8.2 to 30.6 kW
Technical data – Heating
VU 10 VU 15 VU 20
Max. flow temperature
85 ℃ 85 ℃ 85 ℃
Flow temperature adjustment range (factory setting: 75 °C)
30 to 80 ℃ 30 to 80 ℃ 30 to 80 ℃
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