Raypak B0507 Owner's Manual And Installation Instructions page 17

Model
507
538
658
768
868
972
992
1142
1182
1242
1292
1362
1412
1662
1722
1852
1922
2004
2214
2404
2634
2804
3164
3304
3694
3804
4224
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
Grundfos Series Pumps"
system characteristics and need to be calculated. Contact your pump supplier for more information.
WATER FLOW RATE AND PRESSURE DROP
10°C Rise
l/sec kPa
2.75 18
2.87 6
3.58 10
4.06 14
4.66 22
5.26 27
5.38 29
6.09 43
6.31 44
6.31 46
6.31 47
6.31 49
6.31 49
6.31 55
6.31 55
6.31 58
6.31 58
10.63 45
12.06 48
12.62 49
12.62 49
12.62 53
12.62 50
12.62 57
12.62 54
12.62 60
12.62 57
table on page 18. Minimum pressure requirements for TP series pumps depend on
15°C Rise
l/sec kPa
1.83 9
1.91 3
2.39 4
2.71 6
3.11 8
3.5 12
3.58 12
4.06 18
4.22 18
4.38 24
4.54 24
4.78 30
5.02 30
5.68 50
5.68 50
5.68 58
5.68 58
7.09 18
8.04 20
8.44 27
9.56 29
9.95 35
11.47 38
11.79 53
12.62 54
12.62 57
12.62 57
"Minimum Pressure Requirements for
17
CONNECTIONS – PLUMBING
20°C Rise
l/sec kPa
1.37
1.43
1.79
2.03
2.33
2.63
2.69
3.05
3.17
3.28
3.4
3.58
3.76
4.42
5.54
4.9
5.14
5.32
6.03
6.33
7.17
7.47
8.6
8.84
10.03
10.09
11.47
5
3
3
4
5
7
7
10
11
13
15
16
18
27
30
31
39
12
12
17
18
21
23
30
30
42
42