Viessmann Vitodens 200 Technical Manual page 20

1.2 Specification
Vitodens 343
343
*1
Rated output range
T /T = 50 ºC/30 ºC
V R
T /T = 80 ºC/60 ºC
V R
*3
Flue gas values
Flue gas value group according to G 635/G 636
Temperature (at a return temperature of 30 ºC)
at rated output
at partial load
1
Temperature (at a return temperature of 60 ºC)
Mass flow rate
for natural gas
at rated output
at partial load
for LPG
at rated output
at partial load
Available draught
Standard efficiency at
T /T = 50 ºC/30 ºC
V R
T /T = 80 ºC/60 ºC
V R
Average condensate volume
for natural gas and
T /T = 50 ºC/30 ºC
V R
Condensate connection
Flue gas connection
Ventilation connection
*1
Details to EN 677.
*2
Rated output for DHW heating.
*3
Calculation values for sizing the flue gas system to EN 13384.
Flue gas temperatures measured as gross values at 20 ºC combustion air temperature.
The details for partial load refer to an output of 30 % of rated output. Calculate the flue gas mass flow rate accordingly when the
partial load differs from that stated above (subject to the burner mode).
The flue gas temperature at a return temperature of 30 ºC is decisive for sizing the flue gas system.
The flue gas temperature at a return temperature of 60 ºC is used to determine the application range of flue pipes with maximum
permissible operating temperatures.
20
kW
kW
ºC
ºC
ºC
kg/h
kg/h
kg/h
kg/h
Pa
mbar
%
%
litres/day
Hose ferrule ∅ mm
∅ mm
∅ mm
4.2 13.0
*2
3.8 11.8/16.0
G /G
52 51
45
35
68
19.3
6.3
19.9
6.2
100
1.0
109
104
9 11
32
60
100
VITODENS