Water Pressure Drop - Ferroli 150.4 Technical Manual

Air water heat pumps with helical fans
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The graph below illustrates the loss of head values in kPa depending on the flow rate in liters/second. The operating range is
delimited by the minimum and maximum values given in the next table.
150
140
130
120
110
100
90
80
70
60
50
40
30
20
10
3
4
5
6
Limits to operation
Model
Graph reference
Lower limit value
Upper limit value
Maximum operating
pressure on wet side

WATER PRESSURE DROP

7
8
9
10
11
12
150
165
1
2
Q
3.77
4.25
Δ Δ p
Q
14.62
16.44
Δ Δ p
1
2
3
13
14
15
16
17
Water flow rate (l/s)
180
205
230
3
4
5
4.12
4.78
5.49
10
15.97
18.51
21.25
150
600
5
4
6
18
19
20
21
22
23
260
285
315
6
7
8
6.06
6.50
7.00
23.36
25.1
26.93
7
8
24
25
26
27
28
UM
NOTES
Q=Water flow rate
Δ Δ p=Loss of head
l\s
kPa
l\s
kPa
kPa
23

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