Performance factor N
L
to DIN 4708
Cylinder storage temperature T
cyl
= cold water inlet temperature +50 K
+5 K/-0 K
Cylinder capacity litres 160 200 350 500
Performance factor N
L
at heating water flow temperature
90 °C 2.3 6.6 12.0 23.5
80 °C 2.2 5.0 12.0 21.5
70 °C 1.8 3.4 10.5 19.0
Performance factor N
L
The performance factor N
L
varies according to the cylinder storage
temperature 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
Peak output (over 10 minutes)
Based on performance factor N
L
DHW heating from 10 to 45 °C
Cylinder capacity litres 160 200 350 500
Peak output (litres/10 minutes)
at heating water flow temperature
90 °C 203 335 455 660
80 °C 199 290 445 627
70 °C 182 240 424 583
Max. draw-off rate (over 10 minutes)
Based on performance factor N
L
With booster
DHW heating from 10 to 45 °C
Cylinder capacity litres 160 200 350 500
Max. draw-off rate (litres/minute)
at heating water flow temperature
90 °C 20 33 45 66
80 °C 20 29 45 62
70 °C 18 24 42 58
Available water volume
Cylinder volume heated to 60 °C
Without booster
Cylinder capacity litres 160 200 350 500
Draw-off rate l/min 10 10 15 15
Available water volume
Water with t = 60 °C (constant)
litres 150 185 315 440
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 litres 160 200 350 500
Heat-up time (minutes)
at heating water flow temperature
90 °C 19 18 15 20
80 °C 26 25 20 26
70 °C 34 32 31 40
DHW cylinder
(cont.)
32
VIESMANN
VITOGAS
3
5822 428 GB
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