Viessmann VITODENS 242-F Technical Manual page 21

Vitodens 242-F, type B2UA
Gas boiler, type B and C, category II
Rated heating output range (to EN 677)
T /T = 50/30 °C
F R
T /T = 80/60 °C
F R
DHW output
when heating DHW from 10 to 45 °C
Connection values
relative to max. load
with gas
Natural gas E
Natural gas LL
LPG P
*3
Flue gas parameters
Flue gas category to G 635/G 636
Temperature (at a return temperature of 30 °C)
– at rated heating output
– at partial load
Temperature (at a return temperature of 60 °C)
Mass flow rate
– For natural gas
– at rated heating output
– at partial load
– For LPG
– at rated heating output
– at partial load
Available draught
Standard seasonal efficiency [to DIN] at
T /T = 40/30 °C
F R
Max. amount of condensate
to DWA-A 251
Condensate connection (hose nozzle)
Flue gas connection
Ventilation air connection
*3 Calculation values for sizing the flue system to EN 13384.
Flue gas temperatures as actual gross values at 20 °C combustion air temperature.
The flue gas temperature at a return temperature of 30 °C is significant for the sizing of the flue system.
The flue gas temperature at a return temperature of 60 °C is used to determine the application range of flue pipes with maximum permissible
operating temperatures.
VITODENS
(cont.)
2N3P
kW
kW
litre/10 min
m 3 /h
3
m /h
kg/h
°C
°C
°C
kg/h
kg/h
kg/h
kg/h
Pa
mbar
%
l/h
Ø mm
Ø mm
Ø mm
Values in ( ) when operating with LPG P
3.2 (4.8) - 13.0 3.2 (4.8) - 19.0
2.9 (4.3) - 11.8 2.9 (4.3) - 17.2
164
1.89
2.20
1.40
G /G G
52 51 52
45
35
68
31.8
5.5
30.2
7.6
250
2.5
Up to 98 (H ) [gross cv] / 109 (H
s
2.3
20-24 20-24
60
100
5.2 (8.8) - 26.0
4.7 (8.0) - 23.7
164 190
1.89 3.23
2.20 3.75
1.40 2.39
/G G /G
51 52 51
45 45
35 35
68 70
31.8 43.9
5.5 8.7
30.2 41.7
7.6 14.0
250 250
2.5 2.5
) [net cv]
i
2.5 4.3
20-24
60 60
100 100
VIESMANN
21
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