Viessmann VITOSOL SERIES Technical Manual page 61

DHW cylinders
(cont.)
Cylinder temperature sensor for solar operation
Arrangement of cylinder temperature sensor in the heating water
return HR
s
A Cylinder temperature sensor (standard delivery of solar control
unit)
B Threaded elbow fitting with sensor well (standard delivery)
Performance factor N
L
To DIN 4708.
Upper indirect coil.
Cylinder storage temperature T = cold water inlet temperature +50 K
cyl
+5 K/-0 K
Cylinder capacity
Performance factor N at heating water flow temperature
L
90 °C
80 °C
70 °C
Information regarding performance factor N
For multi-cylinder banks, the performance factor N
and the max. draw off rate cannot be determined by multiplying the
performance factor N , the peak output and the max. draw off rate of
L
the individual cylinders by the number of cylinders.
The performance factor N varies according to the cylinder storage
L
temperature Tcyl.
Standard values
→ 1.0 × N
■ T
= 60 °C
cyl L
→ 0.75 × N
■ T
= 55 °C
cyl L
→ 0.55 × N
■ T
= 50 °C
cyl L
→ 0.3 × N
■ T
= 45 °C
cyl L
Peak output (over 10 minutes)
Relative to the performance factor N
DHW heating from 10 to 45 °C.
Cylinder capacity
Peak output (l/10 min) at heating water flow temperature
90 °C
80 °C
70 °C
Max. draw-off rate (over 10 minutes)
Relative to the performance factor N
With booster.
DHW heating from 10 to 45 °C.
Cylinder capacity
Max. draw-off rate (l/min) at heating water flow temperature
90 °C
80 °C
70 °C
VITOSOL
L
, the peak output
L
.
L
.
L
l 300
1.6
1.5
1.4
l 300
173
168
164
l 300
17
17
16
10
400 500
3.0 6.0
3.0 6.0
2.5 5.0
400 500
230 319
230 319
210 299
400 500
23 32
23 32
21 30
VIESMANN
61