Document ydKjBm8G6wY86zDOe1g4Vexn

540 CHAPTER 23 Table 1. Column-Type Cast-Iron Radiator 1953 Guide Height Inches 15 18 20 22 23 26 32 38 45 Generally Accepted Rating per Section* One Column ' Sq Ft Btu/hr Two Column Sq Ft Btu/hr. [ Three Column * Sq Ft Btu/hr 1H 360 1% 360 2` 480 2h... 540 . m 400 2H 2% 540 . 560 . ;3. 2 2% 3 480 600 720 2% 640 3H 800 4 960 5 1200 3% 900 4H 1080 5 1200 6 1440 Four Column Five Column Six column' Sq Ft Btu/hr Sq Ft Btu/hr Sq Ft. Btu/hr, 13 16 720 18 20 720 m 1120 m 900' 4H 1080 22 26 32 38 45 4 5 6H 8 10 960 1200 1560 mo. 2400 7 10 1680 2400 5 1200 * These ratings are based on steam at 215 F and air at 70 F. They , apply only to installed radia* tors exposed in a normal manner; not to radiators installed behind enclosures, grilles, or under shelves. For Btu per hour ratings at other temperatures, divide table values by factors found in Table 6. Table 2. LabgEtTube Cast-Iron Radiators Sectional, cast-iron, tubular-type radiators.of the large-tube pattern, that is, having tubes approximately 1| in. in diameter, 2} in. on centers. Number op Tubes per Section 3 4 5 6 7 Catalog Rating per Section* Sq Ft m 2 2% 3 3% 2H 2H 2H 3H 4H 2H 3 3% 4% 5 3 3h 4 5 6 2H 3H j Btu/hr '420 480 560 720 840 . 540 600 660 840 1020 640 720 840 1040 1200 720 ` 840 960 1200 1440 600 720 880 Height -Width : Section Cbnter . Spacing Leg Height4 To Tapping In. , - In. In. In. 20 23 26 32 38 20 23 26 . 32 38 20 23 26 32 38 i 20 23 26 32 38 14 17 . 20 2ii m 2H 2H 2U 2H 8-85M a 9-10% n%-12i%#' 2K 2M 2H 2H 2Vfi 2tt6. 2 2H4 214d : 2H 2H 2H 2H 2H 2H 2H 2H `m 4% 4h 4% 4% w *H 4H m4H 4H 4H *inn 3 3 3 or 4%. muusa are cased on aieaxn at z 15 F and air at 70 F. They apply only to installed radia tors exposed in a normal manner; not to.radiators installed behind enclosures, grilles, or under shelvesFor Btu per hour ratings at other temperatures, divide table values by factors found in Table 6. b Maximum assembly 60 sections. Length equals number of sections times 24 in. 4 Where greater than standard leg heights are reauired, this dimension shall be 6 in., except for 7-tube sections, in heights from 13 to 20 in., inclusive, for which this dimension shall be 44 in. Radiators may be furbished without legs. For 5-tube hospital-type radiation,-ibis dimension is 3 in.' Radiators and Convectors 541 Table 3. Small-Tube Cast-Iron Radiators Number op Tubes per Section. Catalog Rating per Section* Section Dxuenbionb AB CD Width Height4 Spacing6 Leg Minimum Maximum Height4 Sq Ft Btu/hr In. In. In. In. In. rn (i o 3d 1.6 384 25 3H 3H 1% 2H 1.6 384 19 4Me - 4i%e 1M 2n 4d 1.8 432 22 4Me 4LM m 2n 2.0 480 25 4% 41fie m 2H ( 5d 2.1 504 22 ` 5% 6M 2M 2.4 576 25 5% . 6Me 2H [2.3 552 * 19 6>M 8 i# 2H 6d 3.0 720 25 6 8 m 2H In]3.7 888 32 \ 6lMe 8 m 2n f 0 * These ratings are based on steam at 215 F and air at 70 F. They apply only to installed radia tors exposed in a normal manner; not to radiators installed behind enclosures, grilles, or under - shelves. For Btu per hour ratings at other temperatures, divide table values by factors found-in Table 6. 6 Length equals number of sections times 1} in. 4 Overall height and leg height, as produced by some manufacturers, are one inch (l in.) greater than shown in Columns A and D. Radiators may be furnished without legs. Where greater than standard leg heights are required this dimension shall be 44 in. Or equal. RADIATORS Column and large-tube radiators are no longer manufactured, but since many of these units are still in use, Tables 1 and 2 are included to provide principal dimensions and average ratings of them. The smaU-tube type radiators, with a spacing of If in. per section, are about the only available cast-iron radiating surface for homes and office buildings. Small-tube radiators occupy less space than the older column and large-tube radiators, and are particularly suited for installation in recesses. After a study of the demand for various sizes of radiators, the Institute of Boiler and Radiator Manufacturers, in cooperation with the Division- of Simplified Practice, National Bureau of Standards, established Simplified Practice Recommendation R174-47 for small-tube cast-iron radiators. Table 3 shows the size and dimensions now being manufactured. Wall radiators are hung from wall brackets and are well adapted to use Table 4. Cast-Iron Wall Radiators Approximate Dimensions--Inches Height 13K 13% 22 13% 29 Length or Width 16% 22 13% 29 13% Thickness 3 3 3 3 3 Heat Output* Sq Ft 6% 8 8 11 12 Btu/hr 1560 1920 1920 2640 2640 "These ratings are based on steam at 215 F and air at 70 F. They apply only to installed radiatora exposed in a normal manner, not to radiators installed behiad enclosures, grilles, or under shelves. For Btn per hour ratings at other temperatures divide table values by factors found in Table 6.