Viessmann VITODENS 242-F Technical Manual page 21

Vitodens 242-F, type B2UB
Gas boiler, type B and C, category II
Rated heating output range (to EN 15502-1)
T /T = 50/30 °C
F R
T /T = 80/60 °C
F R
DHW cylinder
Capacity
Permiss. operating pressure (DHW side)
Continuous DHW output
For DHW heating from 10 to 40 °C
Performance factor N
*6
L
Initial DHW output
For DHW heating from 10 to 40 °C
Connection values
relative to max. load
With gas
Natural gas E
Natural gas LL
LPG P
*2
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
Max. amount of condensate
To DWA-A 251
Condensate connection (hose nozzle)
Flue outlet
Ventilation air connection
Standard seasonal efficiency [to DIN] at
T /T = 40/30 °C
F R
Energy efficiency class
– Heating
– DHW heating, draw-off profile XL
*6 At 70 ºC average boiler water temperature and cylinder storage temperature Tcyl = 60 ºC.
DHW performance factor NL depends on cylinder storage temperature Tcyl.
Standard values: Tcyl = 60 ºC → 1.0 × NL Tcyl = 55 ºC → 0.75 × NL Tcyl = 50 ºC → 0.55 × NL Tcyl = 45 ºC → 0.3 × NL.
*2 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 permissi-
ble operating temperatures.
VITODENS
(cont.)
2N3P
kW
kW
Litre
bar
MPa
kW
l/h
l/10 min
m 3 /h
m 3 /h
kg/h
°C
°C
°C
kg/h
kg/h
kg/h
kg/h
Pa
mbar
l/h
Ø mm
Ø mm
Ø mm
%
1.9 - 13.0 1.9 - 19.0
1.7 - 12.1 1.7 - 17.6
170 170
10 10
1 1
17.2 17.2
493 493
1.4 1.4
164 164
1.89 1.89
2.20 2.20
1.40 1.40
G /G G /G
52 51 52 51
45 45
35 35
68 68
31.8 31.8
5.5 5.5
30.2 30.2
7.6 7.6
250 250
2.5 2.5
2.3 2.5
20-24 20-24
60 60
100 100
up to 98 (H ) [gross cv]
s
A A
A A
2.6 - 26.0
2.4 - 24.1
170
10
1
29.3
840
2.0
190
3.23
3.75
2.39
3
G /G
52 51
45
35
70
43.9
8.7
41.7
14.0
250
2.5
4.3
20-24
60
100
A
A
VIESMANN
21