Install Instructions

51
IM-PR 566442 1114 (Design Manual)
Copper Tube Size
(In.)
Recommended
Flow Rate Range
(GPM)
Propylene Glycol Percentage
30% 40% 50%
Heat Carrying Capacity Range (Btu/hr)
¾ 3.7-7.5 52,811 - 107,049 51,393 - 104,174 49,555 - 100,450
1 7-12 87,067 - 178,415 84,729 - 173,624 81,699 - 167,416
1¼ 10-18 129,886 - 266,909 126,399 - 259,742 121,880 - 250,455
1½ 13-26 185,552 - 371,103 180,570 - 361,139 174,114 - 348,227
2 22-44 314,011 - 628,021 305,579 - 611,158 294,654 - 589,307
2½ 33-68 471,016 - 970,579 458,369 - 944,517 441,981 - 910,748
3 49-96 699,388 - 1,370,229 680,608 - 1,333,436 656,275 - 1,285,762
3½ 65-130 927,759 - 1,855,518 902,848 - 1,805,695 870,568 - 1,741,136
4 82-165 1,170,404 - 2,355,081 1,138,976 - 2,291,843 1,098,255 - 2,209,904
Table 1-19 Heat carrying capacity of a primary loop containing a propylene glycol solution. Assumes
temperature drop of 30°F and supply temperature of 130°F. Accuracy within +/- 1% for supply
temperatures between 110-150°F.
Copper Tube Size
(In.)
Recommended
Flow Rate Range
(GPM)
Ethylene Glycol Percentage
30% 40% 50%
Heat Carrying Capacity Range (Btu/hr)
¾ 3.7-7.5 51,061 - 103,502 49,467 - 100,271 47,601 - 96,489
1 7-12 84,182 - 172,503 81,554 - 167,118 78,478 - 160,815
1¼ 10-18 125,583 - 258,065 121,663 - 250,009 117,073 - 240,579
1½ 13-26 179,404 - 358,807 173,804 - 347,607 167,248 - 334,495
2 22-44 303,606 - 607,212 294,129 - 588,258 283,034 - 566,068
2½ 33-68 455,409 - 938,419 441,194 - 909,126 424,552 - 874,833
3 49-96 676,214 - 1,324,827 655,106 - 1,283,473 630,395 - 1,235,059
3½ 65-130 897,019 - 1,794,037 869,018 - 1,738,036 836,238 - 1,672,476
4 82-165 1,131,623 - 2,277,047 1,096,299 - 2,205,969 1,054,946 - 2,122,758
Table 1-20 Heat carrying capacity of a primary loop containing an ethylene glycol solution. Assumes
temperature drop of 30°F and supply temperature of 130°F. Accuracy within +/- 1% for supply
temperatures between 110-150°F.
1.11.2.3 Glycol pressure drop
Determining the pressure drop in a system using
a glycol solution is achieved in the same manner
as for a 100% water system, except that different
pressure drop charts must be used based on the
% glycol solution. Pressure drop tables for piping
using glycol solution are provided above.
See Section 1.9.2, Pressure drop, for information
on how to calculate the total pressure drop across
the system using the tables provided within this
section. Also, don’t forget to account for the
pressure drop from accessories, as detailed in
Section 1.9.2. Once the pressure drop and design
flow rate are known, selecting a circulator involves
the same steps as for a 100% water system.