Cyclopedia of heating, plumbing and sanitation; a complete reference work . quare inches persquare foot of radia-tion for the first floor,lj square inches forthe second floor, and 1\ Square inches for Fig. 1<i7. Indirect Hot-W7aterKadiator. the cold-air duct. Pipe Connections. In indirect hot-water work, it is not desirableto supply more than SO to 100 square feet of radiation from a singleconnection. When the requirements call for larger stacks, theyshould be divided into two or more groups according to size. It is customary to carry up the main from the boiler to a pointnear the basement
Cyclopedia of heating, plumbing and sanitation; a complete reference work . quare inches persquare foot of radia-tion for the first floor,lj square inches forthe second floor, and 1\ Square inches for Fig. 1<i7. Indirect Hot-W7aterKadiator. the cold-air duct. Pipe Connections. In indirect hot-water work, it is not desirableto supply more than SO to 100 square feet of radiation from a singleconnection. When the requirements call for larger stacks, theyshould be divided into two or more groups according to size. It is customary to carry up the main from the boiler to a pointnear the basement ceiling, where it is air-vented through a smallpipe leading to the expansion tank. The various branches shouldgrade downward and connect with the tops of the stacks. In thisway, all air, both from the boiler and from the stacks, will find its wayto the highest point in the main, and be carried off automatically. As an additional precaution, a pet-cock air-valve should lie placidin the last section of each stack, and brought out through the casingby means of a short 125 in; HEATING AND VENTILATION TABLE XXVIII Radiating Surface Supplied by Pipes of Various Sizes—Indirect Hot= Water System Diami n R - DARl li ir OP R Uni inc. Si hi \. i. PIPl LOO li Bun 200 Ft. Hun 300 li Bun 100 li Bun 1 in. 15 II 30 25 1. •• 50 40 25 Mm 77) 60 7,0 _. •• 1 25 inn 00 275 200 150 1 10 3J 425 300 225 _()() 1 ii( id \.ir, 350 300 5 70(1 7,77. 7)00 6 800 7 1,200 Some engineers make a practice of carrying the main to theceiling of the firsl story, and then dropping to the basement before branching to the stacks, the idea being to accelerate the flow of waterthrough the main, which is liable to he sluggish on account of thesmall difference in elevation between the boiler and stacks. Ifthe return leg of the loop is left uncovered, there will be a slight dropin temperature, tending to produce this result; but in any case it willhe exceedingly small. With supply and return mains of s
Size: 1942px × 1286px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthoramericanschoolchicago, bookcentury1900, bookdecade1900
