Install Instructions

IM-PR 566442 1114 (Design Manual)
24
• Low loss header: See manufacturer literature
for sizing guidance.
Figure 1-20 Low loss header
For applications where the working fluid is 100%
water, use Table 1-5 to identify the heat carrying
capacity of the primary piping at various flow rates.
For glycol solutions, see Section 1.11.2.2, Glycol
primary piping sizing.
Application
Copper Tube
Size (In.)
Recommended
Flow Rate Range
(GPM)
Temperature Drop (°F)
10 20 30
Heat Carrying Capacity Range (Btu/hr)
Residential & Light
Commercial
¾ 3.7-7.5
18,500-
37,500
37,000-
75,000
55,500-
112,500
1 7-12
30,500-
62,500
61,000-
125,000
91,500-
187,500
1¼ 10-18
45,500-
93,500
91,000-
187,000
136,500-280,500
Commercial,
Industrial,
Agricultural
1½ 13-26
65,000-
130,000
130,000-260,000 195,000-390,000
2 22-44 110,000-220,000 220,000-440,000 330,000-660,000
2½ 33-68 165,000-340,000 330,000-680,000 495,000-1,020,000
3 49-96 245,000-480,000 490,000-960,000 735,000-1,440,000
3½ 65-130 325,000-650,000 650,000-1,300,000 975,000-1,950,000
4 82-165 410,000-825,000 820,000-1,650,000
1,230,000-
2,475,000
5 130-260 650,000-1,300,000
1,300,000-
2,600,000
1,950,000-
3,900,000
6 180-370 900,000-1,850,000
1,800,000-
3,700,000
2,700,000-
5,550,000
8 320-640
1,600,000-
3,200,000
3,200,000-
6,400,000
4,800,000-
9,600,000
10 500-1000
2,500,000-
5,000,000
5,000,000-
10,000,000
7,500,000-
15,000,000
Table 1-5 Acceptable primary piping size and corresponding heat carrying capacity at various flow rates and
system temperature drops for 0% glycol solutions. For each pipe size and corresponding temperature drop,
the low end of the heat carrying capacity range corresponds with the low end of the recommended flow rate
range (2.0 fps, regardless of GPM), and the high end of the recommended flow rate range corresponds with
the high end of the heat carrying capacity range (4.0 fps, regardless of GPM). GPM = gallons per minute.