Vaillant ecoTEC exclusive 843 Installation And Maintenance Instructions Manual page 57

Gas flow rate at 15 °C
and 1013 mbar (based on
hot water generation, if
applicable), G20
Gas flow rate at 15 °C
and 1013 mbar (based on
hot water generation, if
applicable), G31
Min. flue gas mass rate
(G20)
Min. flue gas mass rate
(G31)
Max. flue gas mass rate
Min. flue gas temperature
Max. flue gas temperat-
ure
Approved gas-fired units
30% efficiency
NOx class
Device Specific Number
(DSN)
SEDBUK (2005)
SEDBUK (2009)
(G20/G31)
Boiler dimension, width
Boiler dimension, height
Boiler dimension, depth
Mounting weight
Operating weight (with
water)
Technical data – G20 power/loading G20
* The lowest nominal heat output may be higher than the value in the technical data, depending on the design of the system
and the current operating status.
Nominal heat output
range P at 50/30 °C *
Nominal heat output
range P at 80/60 °C *
Maximum heat output for
hot water generation
Maximum heat input for
hot water generation
Maximum heat input,
heating side
Minimum heat input
Heating adjustment range
Technical data – Power/loading G31
* The lowest nominal heat output may be higher than the value in the technical data, depending on the design of the system
and the current operating status.
0020193968_03 ecoTEC exclusive Installation and maintenance instructions
835 843
(VUW 356/5‑7 (VUW 436/5‑7
(H-GB)) (H-GB))
ecoTEC ecoTEC
exclusive exclusive
3.5 m³/h 4.3 m³/h
2.54 kg/h 3.12 kg/h
1.62 g/s 2.02 g/s
3.62 g/s 3.62 g/s
14.68 g/s 18.04 g/s
40 ℃ 40 ℃
65 ℃ 65 ℃
C13, C33, C53 C13, C33,
C53
109.7 % 109.8 %
6 6
211 212
A A
89.3 % 89.3 %
440 mm 440 mm
720 mm 720 mm
406 mm 474 mm
47.5 kg 55.0 kg
48.7 kg 57.0 kg
835 843
(VUW 356/5‑7 (VUW 436/5‑7
(H-GB)) (H-GB))
ecoTEC ecoTEC
exclusive exclusive
3.9 4.8
... 26.4 kW ... 36.0 kW
3.4 4.3
... 24.6 kW ... 33.4 kW
35.3 kW 43.4 kW
32.7 kW 40.2 kW
24.8 kW 33.7 kW
3.6 kW 4.5 kW
4 ... 25 kW 5 ... 34 kW
Appendix
57