Carrier 58DLA Installation, Start-Up, Operating And Service And Maintenance Instructions page 19

FURNACE RETURN---AIR
SIZE INLET
135--- 16 / Bottom or
048135 Side(s)
Bottom Only
135--- 22 /
Bottom, Sides or
066135
1 Side & Bottom
1Side Only
Bottom Only
155--- 20 /
Both Sides Or 1
060155
Side & Bottom
1Side Only
*A filter is required for each return ---air inlet. Airflow performance included 3/4 ---in. (19 mm) washable filter media such as contained in factory ---authorized
accessory filter rack. To determine airflow performance without this filter, assume an additional 0.1 In. W.C. available external static pressure.
--- --- Indicates unstable operating conditions.
NOMINAL IRON PIPE
SIZE
IN. (MM)
1/2 (12.7)
3/4 (19.0)
1( 25.4)
1-1/4 (31.8)
1-1/2 (38.1)
* Cubic ft. of natural gas per hr for gas pressures of 0.5 psig (14 ---In. W.C.) or less and a pressure drop of 0.5 ---In. W.C. (based on a 0.60 specific gravity gas).
Ref: Table 6 and NFPA/54 ANSI Z223.1 ---2009.
Table 5 - - Air Delivery - - CFM (With Filter)* (CONT)
SPEED
0.1 0.2
High 2090 2010
Med --- High 1790 1755
Med --- Low 1545 1525
Low 1325 1320
High 2485 2400
Med --- High 2195 2150
Med --- Low 1880 1850
Low 1640 1635
High --- --- --- ---
Med --- High 2180 2145
High --- --- --- ---
Med --- High 2135 2085
High 2465 2430
Med --- High 2115 2105
Med --- Low 1800 1790
Low 1570 1565
High --- --- --- ---
Med --- High 2155 2135
High --- --- --- ---
Med --- High 2140 2095
Table 6 – Maximum Capacity of Pipe
INTERNAL
DIA.
10 (3.0)
IN. (MM)
0.622 (158) 175
0.824 (20.9) 360
1.049 (26.6) 680
1.380 (35.0) 1400
1.610 (40.9) 2100
EXTERNAL STATIC PRESSURE (IN. W.C.)
0.3 0.4 0.5 0.6
1930 1835 1710 1590
1705 1640 1550 1465
1500 1450 1380 1315
1295 1265 1210 1150
2310 2215 2110 2000
2090 2000 1920 1825
1820 1780 1715 1635
1615 1585 1530 1465
2385 2305 2195 2085
2060 2010 1945 1865
2245 2155 2055 1940
2035 1975 1895 1795
2375 2305 2230 2110
2075 2030 1980 1910
1770 1735 1695 1640
1550 1525 1495 1445
2375 2285 2200 2105
2095 2040 1975 1895
2260 2180 2085 1975
2040 1975 1890 1810
LENGTH OF PIPE --- FT (M)
20 (6.0) 30 (9.1)
120 97
250 200
465 375
950 770
1460 1180
19
0.7 0.8 0.9 1.0
1470 1335 1025 835
1360 1210 945 785
1215 1005 855 670
995 865 745 540
1880 1725 1535 1355
1720 1565 1405 1255
1540 1415 1290 1160
1370 1255 1150 1040
1960 1825 1670 1465
1765 1660 1515 1325
1825 1695 1555 1385
1685 1565 1445 1265
2000 1865 1725 1545
1830 1725 1590 1425
1570 1465 1345 1225
1370 1270 1175 1070
1995 1870 1730 1570
1790 1685 1550 1400
1865 1740 1605 1455
1705 1595 1480 1325
40 (12.1) 50 (15.2)
82 73
170 151
320 285
660 580
990 900