Viessmann VITODENS 200-W Technical Manual page 20

Installation accessories
Low loss header
Part no. 7460 649
3
Flow rate max. 4.5 m /h
Including thermal insulation and integral sensor well.
The connection between boiler and low loss header must be made on
site.
HV
120
2
A
G 1½
HV
A Sensor well
B Optional blow-down
HV Heating water flow
HR Heating water return
Part no. 7460 648
3
Flow rate max. 7.5 m /h
Including thermal insulation and integral sensor well.
The connection between boiler and low loss header must be made on
site.
HV
A
HV
Circulation pump curves and pressure drop on the heating water side
The residual pump head results from the difference between the selec-
ted pump curve and the pressure drop curve of the respective heating
circuit distributor or further components (pipe assembly, distributor
etc.).
VIESMANN
20
(cont.)
447
HR
B Rp 1
350
523
420
G 2
G 2 Rp 2
B
420
Pressure drop
14
12
10
8
6
4
2
0
0
Flow rate in m³/h
HR
Pressure drop
16
HR
14
12
10
8
6
4
2
0
0
Flow rate in m³/h
HR
The following pump diagrams show the pressure drop curves of the
different Dicivon heating circuit distributors.
Maximum flow rate for Divicon:
1 2 3 4 5
1 2 3 4 5
VITODENS 200-W
6 7 8