Information regarding performance factor N
L
The performance factor N
L
depends on the cylinder storage tempera-
ture T
cyl
.
Standard values
■ T
cyl
= 60 °C → 1.0 × N
L
■ T
cyl
= 55 °C → 0.75 × N
L
■ T
cyl
= 50 °C → 0.55 × N
L
■ T
cyl
= 45 °C → 0.3 × N
L
Note
For multi cylinder banks, the performance factor N
L
cannot be deter-
mined through multiplication of the performance factor N
L
of the indi-
vidual cylinders by the number of cylinders.
Peak output (over 10 minutes)
Relative to the performance factor N
L
.
DHW heating from 10 to 45°C.
Cylinder capacity
l
200
300
390
Peak output
(l/10 min)
at heat transfer medium flow temperature
90 °C
262
401
512
80 °C
252
399
512
70 °C
246
385
445
Note
For multi cylinder banks, the peak output cannot be determined
through multiplication of the peak output of the individual cylinders by
the number of cylinders.
Max. draw-off rate (over 10 minutes)
Relative to the performance factor N
L
.
With reheating.
DHW heating from 10 to 45°C.
Cylinder capacity
l
200
300
390
Max. draw-off rate
(l/min)
at heat transfer medium flow temperature
90 °C
26
41
51.2
80 °C
25
40
51.2
70 °C
25
39
44.5
Note
For multi cylinder banks, the maximum draw-off rate cannot be deter-
mined through multiplication of the maximum draw-off rate of the indi-
vidual cylinders by the number of cylinders.
Drawable water volume
Cylinder volume heated to 60°C.
Without reheating.
Cylinder capacity
l
200
300
390
Draw-off rate
l/min
10
15
10
Drawable water volume
l
195
290
330
Water with t = 60 °C (constant)
Heat-up time
The heat-up times specified will be achieved subject to the maximum
continuous output of the DHW cylinder being made available at the
relevant flow temperature and when DHW is heated from 10 to
60 °C.
Cylinder capacity
l
200
300
390
Heat-up time
(min)
at heat transfer medium flow temperature
90 °C
19
23
27
80 °C
24
31
36
70 °C
37
45
55
DHW cylinders
(cont.)
VITOSOL
VIESMANN
69
5822 440 GB
11