Raypak B0507 - Page 17

CONNECTIONS – PLUMBING
17
WATER FLOW RATE AND PRESSURE DROP
10°C Rise
15°C Rise
20°C Rise
Model
l/sec
kPa
l/sec
kPa
l/sec
kPa
507
2.75
18
1.83
9
1.37
5
538
2.87
6
1.91
3
1.43
3
658
3.58
10
2.39
4
1.79
3
768
4.06
14
2.71
6
2.03
4
868
4.66
22
3.11
8
2.33
5
972
5.26
27
3.5
12
2.63
7
992
5.38
29
3.58
12
2.69
7
1142
6.09
43
4.06
18
3.05
10
1182
6.31
44
4.22
18
3.17
11
1242
6.31
46
4.38
24
3.28
13
1292
6.31
47
4.54
24
3.4
15
1362
6.31
49
4.78
30
3.58
16
1412
6.31
49
5.02
30
3.76
18
1662
6.31
55
5.68
50
4.42
27
1722
6.31
55
5.68
50
5.54
30
1852
6.31
58
5.68
58
4.9
31
1922
6.31
58
5.68
58
5.14
39
2004
10.63
45
7.09
18
5.32
12
2214
12.06
48
8.04
20
6.03
12
2404
12.62
49
8.44
27
6.33
17
2634
12.62
49
9.56
29
7.17
18
2804
12.62
53
9.95
35
7.47
21
3164
12.62
50
11.47
38
8.6
23
3304
12.62
57
11.79
53
8.84
30
3694
12.62
54
12.62
54
10.03
30
3804
12.62
60
12.62
57
10.09
42
4224
12.62
57
12.62
57
11.47
42
Intermittent Pump Operation
Where pump operation is intermittent, a remote thermostat must be fitted in the system and a pump run on timer is
required to remove residual heat from the water heater and prevent nuisance tripping of the high limit thermostat. A
run on timer is available as an optional kit (Rheem part No 56076874).
Minimum Pump Inlet Pressure
Circulating pumps require a minimum inlet pressure in order to operate without cavitation. For the minimum
pressure requirements for Grundfos UPS series pumps, refer to the “Minimum Pressure Requirements for
Grundfos Series Pumps” table on page 18. Minimum pressure requirements for TP series pumps depend on
system characteristics and need to be calculated. Contact your pump supplier for more information.