Nordyne SC Installation Instructions Manual page 38

Model Number
& Motor
Heating Input Speed
(Btuh)
HIGH
SD108D-45D
MED-H
Bottom Return
MED-L
(108,000)
LOW
HIGH
SD108D-45D
MED-H
Side Return
MED-L
(108,000)
LOW
HIGH
SD120D-45D
MED-H
Bottom Return
MED-L
(120,000)
LOW
HIGH
SD120D-45D
MED-H
Side Return
MED-L
(120,000)
LOW
Model Number
& Motor
Heating Input Speed
(Btuh)
HIGH
SM054D-24B
MED-H
Top Return
MED-L
(54,000)
LOW
HIGH
SM072D-35C
MED-H
Top Return
MED-L
(72,000)
LOW
HIGH
SM090D-35C
MED-H
Top Return
MED-L
(90,000)
LOW
HIGH
SM118D-45D
MED-H
Top Return
MED-L
(118,000)
LOW
NOTES:
*
Factory Set Cooling Speed
**
Factory Set Heating Speed
1. Two openings are recommended for airflows above 1,600 CFM if filter(s) is(are) adjacent to furnace
2. Temperature rises in the table are approximate. Actual temperature rises may vary.
3. Cells shaded in gray indicate a temperature rise outside of the recommended range.
38
MAXIMUM AIRFLOW & TEMPERATURE RISES (
UPFLOW / HORIZONTAL FURNACES (*SD SERIES)
0.1 0.2
CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise
*
2276 44 2228 45
**
2113 47 2078 48
1819 55 1789 56
1496 67 1484 67
*
2306 43 2247 45
**
2135 47 2103 50
1845 54 1834 57
1543 65 1521 69
*
2276 49 2228 50
**
2113 53 2078 53
1819 61 1789 62
1496 — 1484 —
*
2306 48 2247 49
**
2135 52 2103 53
1845 60 1834 61
1543 — 1521 —
Table 8. Continued
MAXIMUM AIRFLOW & TEMPERATURE RISES (
DOWNFLOW FURNACES (*SM SERIES)
0.1 0.2
CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise CFM Rise
*
1590 31 1563 32
1228 41 1207 41
**
1096 46 1079 46
855 58 825
—
*
2235 2176
— —
**
2095 2052
— —
1871 36 1838 36
1568 43 1552 43
*
2208 38 2150 39
**
2065 40 2015 41
1802 46 1773 47
1490 56 1482 56
*
2358 46 2299 48
**
2176 50 2135 51
1873 58 1852 59
1544 — 1528 —
Table 9. *SM Downflow Furnaces
External Static Pressure (Inches Water Column)
0.3 0.4
2173 46 2108 47 2035
2019 50 1970 51 1904
1757 57 1706 59 1666
1459 69 1430 70 1402
2192 46 2121 47 2044
2050 51 1995 53 1935
1805 58 1776 59 1719
1502 70 1477 — 1452
2173 51 2108 53 2035
2019 55 1970 56 1904
1757 63 1706 65 1666
1459 — 1430 — 1402
2192 51 2121 52 2044
2050 54 1995 56 1935
1805 62 1776 63 1719
1502 — 1477 — 1452
External Static Pressure (Inches Water Column)
0.3 0.4
1538 33 1513 33 1477
1193 42 1169 43 1157
1061 47 1038 48 1010
800 777 753
— —
2121 2067 2010
— —
2005 1957 1906
— —
1797 37 1761 38 1716
1527 44 1485 45 1457
2089 40 2026 41 1959
1970 42 1910 44 1866
1750 48 1703 49 1670
1464 57 1436 58 1407
2253 48 2191 50 2130
2102 52 2046 53 1985
1816 60 1790 61 1750
1514 — 1499 — 1462
F) FOR
0
0.5 0.6 0.7
49 1961 51 1876
53 1840 54 1768
60 1610 62 1551
— 1363 — 1330
49 1979 51 1892
54 1858 57 1778
61 1663 63 1605
— 1412 — 1368
55 1961 57 1876
58 1840 60 1768
67 1610 69 1551
— 1363 — 1330
54 1979 56 1892
57 1858 60 1778
65 1663 67 1605
— 1412 — 1368
F) FOR
0
0.5 0.6 0.7
34 1430 35 1370 36
43 1127 44 1084 46
50 986 51 957 52
723 696
— — —
1936 1864 36
— —
35 1852 36 1781 37
39 1667 40 1602 42
46 1418 47 1370 49
43 1893 44 1825 46
45 1805 46 1737 48
50 1623 51 1556 54
59 1380 60 1329 63
51 2060 53 1990 55
55 1932 57 1862 59
62 1699 64 1643 66
— 1441 — 1429 —
0.8
53 1778 56
57 1677 60
64 1486 67
— 1262 —
53 1787 56
59 1690 62
66 1533 69
— 1314 —
59 1778 62
63 1677 66
— 1486 —
— 1262 —
59 1787 62
62 1690 66
69 1533 —
— 1314 —
0.8
1312 38
1037 48
919 54
665
—
1783 37
1709 39
1536 43
1343 50
1738 48
1668 50
1490 56
1271
—
1903 57
1777 61
1571 70
1386 —