Viessmann VITOLADENS 300-W Technical Manual page 37

Installation accessories
■ with R ¾ = 1.0 m
3 /h
■ with R 1 = 1.5 m 3 /h
■ with R 1¼ = 2.5 m 3
/h
Example:
3
Flow rate ´ = 0.665 m /h
Selected:
Divicon with mixer R ¾ and circulation pump Wilo VIRS 25/4-3, pump
curve 2, pump rate 0.7 m 3 /h
Manually controlled heating circuit pumps
Wilo VIRS 25/4-3
500 50
400 40
300 30
200 20
100 10
A
0 0
0 0.5 1.0
Pump rate in m³/h
A Divicon R ¾ with mixer
B Divicon R 1 with mixer
C Divicon R 1¼ with mixer
D Divicon R ¾, R 1 and R 1¼ without mixer
Wilo VIRS 25/6-3
600 60
500
50
400
40
300
30
200 20
100 10
A
0 0
0 0.5 1.0
Pump rate in m³/h
A Divicon R ¾ with mixer
B Divicon R 1 with mixer
VITOLADENS 300-W/VITOLADENS 333-F
(cont.)
Head of the relevant pump
curve:
Divicon pressure drop:
Residual head:
Note
For further components (pipe assembly, distributor, etc.) determine the
pressure drop and deduct it from the residual head.
C Divicon R 1¼ with mixer
D Divicon R ¾, R 1 and R 1¼ without mixer
Grundfos VIUPS 25-40
C
B
D
1.5 2.0 2.5
A Divicon R ¾ with mixer
B Divicon R 1 with mixer
C Divicon R 1¼ with mixer
D Divicon R ¾, R 1 and R 1¼ without mixer
Grundfos VIUPS 25-60
C
B
D
1.5 2.0 2.5
A Divicon R ¾ with mixer
B Divicon R 1 with mixer
28 kPa
3.5 kPa
28 kPa – 3.5 kPa = 24.5 kPa.
400 40
300 30
200 20
100 10
A
0 0
0 0.5 1.0
Pump rate in m³/h
600 60
500 50
400 40
300 30
200 20
100 10
B
A
0 0
0 0.5 1.0
Pump rate in m³/h
C
B
D
1.5 2.0 2.5
C
D
1.5 2.0 2.5
VIESMANN
37
4