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XI. Hot Water Supply Boiler Piping (continued)
Table 27: Water Quality Requirements
Quality Parameter
Water Hardness (ppm)
Total Dissolved Solids (ppm)
Chlorine (ppm)
Chloride (ppm)
pH (cold)
Notes:
The combined water hardness and TDS cannot exceed
450 ppm.
1 grain per gallon = 17.1 ppm
NOTICE
NOTICE
Water temperatures over 140 °F (60 °C) greatly
increase the affects of corrosive chemicals.
Chlorine and Chloride have different levels
of corrosion effects on stainless steel. It is
recommended for chlorine (Cl2) levels to be below
5ppm and chloride (Cl
ppm for 316 stainless steel.
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 must be designed to maintain the flow rate within the recommended range shown in Table 28. Also
see Table 26 and Table 23 for more flow rate requirements.
Table 28: Temperature Rise, Flow Rate, and Head Loss
Recommended Range
Delta 20 °F
AMPW
Head
Model
GPM
Loss
GPM
(ft)
1000
98
11.3
1250
123
16.1
1500
147
15.6
2000
196
20.1
2500
245
15.7
3000
294
20.3
3500
343
14.6
4000
392
18.4
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.
Minimum
Maximum
80
100
-
-
6.5
) levels to be below 1000
-
Delta 25 °F
Delta 30 °F
Head
Head
Loss
GPM
Loss
(ft)
(ft)
78
8
65
6
98
11.3
82
8.5
118
10.9
98
8.2
157
14.2
131
10.6
196
11.5
163
9
235
14.8
196
11.5
274
10.2
229
7.7
314
12.6
261
9.4
The AMP heat exchanger is made from stainless
steel tubular double coil having relatively narrow
205
waterways. Once filled with water, it will be
450
subject to the effects of corrosion. Failure to take
the following precautions to minimize corrosion,
5
and overheating could result in severe product
1000
damage.
7.5
Before connecting the appliance, insure the system
is free of impurities, grease, sediment, construction
dust, sand copper dust, and flux. Flush the system
thoroughly and repeatedly, if needed.
Scale deposit is made up of lime scale contained
in most distributed water and settles over the
warmest surfaces of the heat exchanger causing
subsequent overheating and eventual failure.
Scale can form from high water hardness and
slow water velocities. Failure to maintain the
recommended water hardness and flow rate
will result in a buildup of scale inside the heat
exchanger.
Delta 35 °F
Delta 40 °F
Head
Head
GPM
Loss
GPM
Loss
(ft)
(ft)
56
4.7
49
3.8
70
6.6
61
5.4
84
6.4
74
5.2
112
8.4
98
6.8
140
7.3
123
6.2
168
9.3
147
7.8
196
6.2
172
5.2
224
7.5
196
6.2
52
NOTICE
NOTICE
Delta 45 °F
Delta 50 °F
Head
Head
GPM
Loss
GPM
Loss
(ft)
(ft)
44
3.1
39
2.7
54
4.5
49
3.8
65
4.3
59
3.7
87
5.6
78
4.8
109
5.3
98
4.6
131
6.7
118
5.8
152
4.6
137
4.1
174
5.3
157
4.7
Delta 55 °F
Head
GPM
Loss
(ft)
36
2.3
45
3.3
53
3.1
71
4.1
89
4.1
107
5.2
125
3.7
143
4.2
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