Viessmann vitodens Technical Manual page 10

1.2 Specification
Vitodens 300
300
Gas fired boiler
Rated output range
T /T = 50/30 ºC
V R
T /T = 80/60 ºC
V R
Connection values
relative to max. output
with gas with H
1
Natural gas E 9.45 kWh/m
34.01 MJ/m
Natural gas LL 8.13 kWh/m
29.25 MJ/m
LPG 12.79 kWh/m
46.04 MJ/m
*2
Flue gas values
Flue gas value group to G 635/G 636
Temperature (at a return
temperature of 30 ºC)
at rated output
at partial load
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 = 40/30 ºC
V R
T /T = 75/60 ºC
V R
Average condensate volume
for natural gas and
T /T = 50/30 ºC
V R
T /T = 80/60 ºC
V R
Internal diameter of pipe to
expansion vessel
safety valve
Condensate connection
Flue outlet
Ventilation pipe
*1
Rated output for DHW heating.
*2
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.
" For the specification of Viessmann modular components, see the folder Vitotec 1.
10
kW 4.5 12.0/16.0
kW
uB
3 3
m /h
3
3 3
m /h
3
3
kg/h
3
ºC
ºC
ºC
kg/h
kg/h
kg/h
kg/h
Pa
mbar
%
%
litres/day
litres/day
DN
DN
Hose coupling
∅ mm
Internal ∅ mm
External ∅ mm
Gas fired boiler
*1
6.6 26.0 8.7 35.0
4 11 6 23.7 8 32
2.65 3.52
3.08 4.10
1.94 2.59
G /G G /G
52 51 52 51
45 45
35 35
70 70
47.3 63.2
11.8 15.7
46.4 61.0
11.5 15.4
100 100
1.0 1.0
109 109
104 104
11 13 15 17
8 10 10 12
20 20
15 15
20 24 20 24
80 80
125 125
Gas fired
combination
boiler
12.2 49.0 16.6 66.0
11 44.6 15 60.1
4.90 6.69
5.64 7.77
3.62 4.94
G /G G /G
52 51 52 51
35 40
33 35
65 70
81.2 110.6
21.1 27.7
78.2 106.7
18.0 26.6
100 100
1.0 1.0
109 109
104 104
14 19 23 28
11 15 18 22
20 20
20 20
20 24 20 24
100 100
150 150
VITODENS
6.6 26.0
6 23.7
2.65
3.08
1.94
G /G
52 51
45
35
70
47.3
11.8
48.4
11.5
100
1.0
109
104
11 13
8 10
20
15
20 24
80
125