Nordyne SC038D-23A Installation Instructions Manual page 32

Heating
Model Motor
Input
Number Speed
(Btuh)
HIGH*
MED-HIGH
MED-LOW**
LOW
HIGH*
MED-HIGH** 1,245
MED-LOW
LOW
HIGH*
MED-HIGH** 1,845
MED-LOW
LOW
HIGH*
MED-HIGH** 2,050
MED-LOW
LOW
* Factory Set Cooling Speed
** Factory Set Heating Speed
32
DOWNFLOW GAS FURNACES
0.1 0.2
CFM Rise CFM Rise
1,580 29 1,550 30 1,520
1,240 37 1,230 37 1,210
1,145 40 1,120 41 1,100
895 51 870 53
1,560 39 1,530 40 1,500
49 1,225 50 1,205
1,085 57 1,070 57 1,045
850 72 830 74
1,955 39 1,905 40 1,835
42 1,790 43 1,750
1,320 58 1,290 59 1,250
1,190 64 1,165 66 1,125
2,215 46 2,150 48 2,075
50 2,015 51 1,955
1,720 59 1,690 60 1,655
1,420 72 1,410 72 1,400
1. Temperature rises in the table are approximate. Actual temperature rises may vary.
2. Temperature rises shaded in gray are for reference only. These conditions are not recommended.
Table 5. *SL - 92.1% AFUE, Single Stage, Downfl ow Gas Furnace
External Static Pressure (Inches Water Column)
0.3 0.4
CFM Rise CFM Rise CFM
30 1,485 31 1,460
38 1,185 39 1,165
42 1,080 43 1,055
850 54 825 56
41 1,480 41 1,435
51 1,180 52 1,150
59 1,025 60 1,000
800 77 780 79
42 1,795 43 1,730
44 1,680 46 1,515
61 1,215 63 1,180
68 1,080 71 1,055
49 2,035 50 1,970
52 1,900 54 1,860
62 1,640 62 1,610
73 1,365 75 1,350
NOTES:
0.5 0.6
Rise CFM Rise CFM
32 1,425 32 1,375
39 1,135 41 1,100
44 1,030 45 985
800 58 770 60 740
43 1,400 44 1,360
53 1,125 55 1,090
61 970 63 930
760 81 730 84 710
44 1,620 47 1,545
51 1,540 50 1,475
65 1,120 68 1,050
73 1,000 77 945
52 1,905 54 1,800
55 1,795 57 1,720
63 1,560 66 1,505
76 1,335 77 1,290
0.7 0.8
Rise CFM Rise
33 1,320 35
42 1,045 44
47 940 49
62 715 64
45 1,310 47
56 1,045 59
66 880 70
86 685 90
50 1,450 53
52 1,410 54
73 970 79
81 875 88
57 1,745 59
59 1,620 63
68 1,465 70
79 1,260 81