Potterton SIRIUS FS Installation & Servicing Instructions Manual page 21

4.5.2 Water Pressure Loss
The boiler pump must have a delivery head which can ensure the water flow rate in the
following diagrams:
35K
T=
Data table 1400
500 380
1300
T=
5 30 50
1200
10 100 150
1100
Data table 1400
15 180 300
500 380
1000 1300
20 300 510
5 30 50
900 1200
25 460 800
10 100 150
1100
800
30 680 1120
15 180 300
1000
700
35 900
20 300 510
900
600
25 460 800
800
500
30 680 1120
700
400
35 900
600
300
500
200
400
100
300
0
200
5
100
0
5
T=
1400
1300
1400
1200
1300
1100
1200
1000
1100
900
1000
800
900
700
800
600
700
500
600
400
500
300
400
200
300
100
200
0
100
0
5
5
Sirius FS
Water pressure loss graphs
25K
T=
35K 25K
T=
10
10
35K
35K
T=
10 15
10 15
Flow rate (m3/h)
FS400
20K
T=
20K
T=
15 20
Flow rate (m3/h)
15 20
Flow rate (m3/h)
25K 20K
T=
T=
FS525
25K 20K
T=
T=
20
20
Flow rate (m3/h)
19
25
25
25 30
25 30
GB/IE
30
30
35
35