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IX. Hydronic Piping (continued)
F. Temperature Rise and Heat Exchanger Head Loss
1. The AMP heat exchanger adds pressure drop to the system which must be accounted for in the design of the
piping configuration and pump selection.
2. The system should be designed to operate within the recomended range shown in Table 24.
a. Exceeding the maximum water flow rates can cause pipe erosion, damage the flow switch, and allow unsafe
operation. Maintaining sufficient flow through the heat exchanger will help prevent the buildup of scale.
Table 24: Temperature rise, flow rate, and head loss
Recommended Range
Delta 20 °F
AMP
Head
Model
GPM
Loss
(ft)
400
39
12.4
500
49
13.7
650
63
11.8
800
78
12.8
1000L
97
14.6
Required Flow = Output×1000/(500×ΔT), where flow rate is in GPM, output is in MBH, and ΔT is in 0F, Outputs are
shown in Table 1.
This Boiler has a temperature rise (delta) limit of 55 °F
AMP 400-1000L I&O Manual
Delta 25 °F
Delta 30 °F
Head
Head
GPM
Loss
GPM
Loss
(ft)
(ft)
31
8.4
26
6.2
39
9.3
32
6.7
50
8.2
42
6.1
62
9.2
52
7.0
78
9.9
65
7.2
Delta 35 °F
Delta 40 °F
Head
Head
GPM
Loss
GPM
Loss
(ft)
(ft)
22
4.7
19
3.8
28
5.1
24
4.1
36
4.7
32
3.8
44
5.6
39
4.6
55
5.5
49
4.4
Delta 45 °F
Delta 50 °F
Head
Head
GPM
Loss
GPM
Loss
(ft)
(ft)
17
3.1
16
2.6
22
3.3
19
2.7
28
3.1
25
2.6
34
3.9
31
3.3
43
3.6
39
3.0
Delta 55 °F
Head
GPM
Loss
(ft)
14
2.2
18
2.3
23
2.3
28
2.9
35
2.5
41
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