Viessmann VITOCAL Series - Page 87

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 with sensor well (standard delivery, internal
diameter 6.5 mm)
Performance factor N
L
■ To DIN 4708
■ Upper indirect coil
■ Cylinder storage temperature T
cyl
= cold water inlet temperature +
50 K
+5 K/-0 K
Cylinder capacity l 300 400 500
750
*13
950
*13
Performance factor N
L
at heating water flow temperature
90 °C 1.6 3.0 6.0 8.0 11.0
80 °C 1.5 3.0 6.0 8.0 11.0
70 °C 1.4 2.5 5.0 7.0 10.0
Information regarding performance factor N
L
The performance factor N
L
changes in line with the cylinder storage
temperature Tcyl.
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)
■ Relative to performance factor N
L
■ DHW heating from 10 to 45 °C
Cylinder capacity l 300 400 500 750
*13
950
*13
Peak output
at heating water flow temperature
90 °C l/10 min 173 230 319 438 600
80 °C l/10 min 168 230 319 438 600
70 °C l/10 min 164 210 299 400 550
Max. draw-off rate (over 10 minutes)
■ Relative to performance factor N
L
■ With reheating
■ DHW heating from 10 to 45 °C
Cylinder capacity l 300 400 500
750
*13
950
*13
Max. draw-off rate
at heating water flow temperature
90 °C l/min 17 23 32 44 60
80 °C l/min 17 23 32 44 60
70 °C l/min 16 21 30 40 55
*13
Values determined by calculation.
Installation accessories
(cont.)
VITOCAL
VIESMANN
87
5831388
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