42
AMPW 400-1000L I&O Manual
Recommended Range
AMPW
Model
Delta 20 °F
Delta 25 °F
Delta 30 °F
Delta 35 °F
Delta 40 °F
Delta 45 °F
Delta 50 °F
Delta 55 °F
GPM
Head
Loss
(ft)
GPM
Head
Loss
(ft)
GPM
Head
Loss
(ft)
GPM
Head
Loss
(ft)
GPM
Head
Loss
(ft)
GPM
Head
Loss
(ft)
GPM
Head
Loss
(ft)
GPM
Head
Loss
(ft)
400
39
12.4
31
8.4
26
6.2
22
4.7
19
3.8
17
3.1
16
2.6
14
2.2
500
49
13.7
39
9.3
32
6.7
28
5.1
24
4.1
22
3.3
19
2.7
18
2.3
650
63
11.8
50
8.2
42
6.1
36
4.7
32
3.8
28
3.1
25
2.6
23
2.3
800
78
12.8
62
9.2
52
7.0
44
5.6
39
4.6
34
3.9
31
3.3
28
2.9
1000L
97
14.6
78
9.9
65
7.2
55
5.5
49
4.4
43
3.6
39
3.0
35
2.5
Required Flow = Output×1000/(500×ΔT), where flow rate is in GPM, output is in MBH, and ΔT is in 0
F, Outputs are
This water heater has a temperature rise (delta) limit of 55 °F
Figure 17: Heat exchanger water
pressure loss
. Water 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 maintain the operating water flow rate shown in
the range of absolute flow rates shown in
. Exceeding the maximum water flow rates can cause pipe
erosion, damage the flow switch, and allow unsafe operation.
a. Maintaining sufficient flow through the heat exchanger will help prevent the buildup of scale.
Table 22: Temperature rise, flow rate, and head loss
0
5
10
15
20
25
30
0
20
40
60
80
100
120
140
W
ater
P
ressu
re
Lo
ss
es
(f
t-
he
ad
)
Water Flow Rate (us gal/min)
400MBTU/h
500MBTU/h
650MBTU/h
800MBTU/h
1000MBTU/h
