Viessmann vitodens Technical Manual page 13

Specification
Gas fired boiler, series B and C,
Category I (natural gas version)
2ELL
Category II (LPG version)
2ELL 3P
*1
Rated output range
T /T = 50/30 ºC
V R
T /T = 80/60 ºC
V R
Rated thermal load
Product ID
Gas supply pressure
Natural gas
LPG
Max. permiss. gas supply pressure
Max. power consumption
(incl. circulation pump)
Weight
Capacity Heat exchanger
Heating water volume flow
at 200 mbar residual head
Max. volume flow
(limits for the use of a low loss header)
Rated circulation water volume
at DT = 20 K
Permiss. operating pressure
Diaphragm expansion vessel
Capacity
Inlet pressure
Connections
Boiler flow and return
Hot and cold water
DHW circulation
Dimensions
Length
Width
Height
Gas connection
DHW loading cylinder
Capacity
Permissible operating pressure (DHW side)
Continuous DHW output
for DHW temperature rise from 10 to 45 ºC
*5
Performance factor N
L
Max. draw-off rate at the stated DHW performance
factor N when raising DHW from 10 to 45 ºC
L
Connection values relative to the max. load
with gas with H
uB
Natural gas E 9.45 kWh/m
3
34.01 MJ/m
Natural gas LL 8.13 kWh/m
3
29.25 MJ/m
LPG 12.79 kWh/m
3
46.04 MJ/m
*1
Details to EN 677.
*2
Rated output for DHW heating.
*3
Available from October 2004. Specification on request.
*4
If the gas supply pressure is higher than the maximum permitted value, a separate gas governor must be installed upstream of the system.
*5
At 70 ºC average boiler water temperature and cylinder storage temperature Tcyl = 60 ºC.
The DHW performance factor N
Guide values: Tcyl = 60 ºC ³ 1.0 × N
VITODENS
kW
kW
kW
mbar
mbar
*4
mbar
W
kg
litres
l/h
l/h
l/h
bar
litres
bar
G (female thread)
G (female thread)
G (male thread)
mm
mm
mm
G (female thread)
litres
bar
kW
l/h
l/min
3 3
m /h
3 3
m /h
3
kg/h
varies according to the cylinder storage temperature Tcyl.
L
Tcyl = 55 ºC ³ 0.75 × N
L
4.5 12.0/16.0
4.0 11.0
Tcyl = 50 ºC ³ 0.55 × N
L L
1.2 Specification
Vitodens 333
*2, *3
6.6 26.0
6.0 23.7
4.2 16.7 6.3 25
CE 0085 BO 0338
Tcyl = 45 ºC ³ 0.3 × N .
L
333
1
20
50
57.5
120
130
3.7
1 050
1 400
1 032
3
12
0.75
¾"
¾"
1"
588
600
1 387
¾"
86
10
24
590
2.0
19
2.65
3.08
1.94
13