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OHCFA072DV4
ALTERATIONS REQ’D FOR A/C @ DESIGN EXTERNAL STATIC PRESSURE
COOLING UNIT
Recommended HTG Speed
Recommended CLG Speed
24,000
Med Low
Low
30,000
Med Low
Med Low
36,000
Med Low
Med
42,000
Med Low
Med High
48,000
Med Low
High
Low= Red
Med Low= Purple
Med= Blue
Med Hi= Yellow
High= Black
Table 6: Blower Motor Speed Setup
Speed Tap\
Static Pressure
Furnace Airflow (CFM) vs. External Static pressure (in. WC.)
0.1
0.2
0.3
0.4
0.5
0.6
0.7
Low
1018
959
917
857
794
706
638
ML
1180
1140
1075
1137
992
952
887
Med
1311
1276
1244
1202
1146
1122
1062
MH
1554
1524
1489
1440
1403
1360
1316
HIGH
1718
1688
1656
1620
1583
1554
1524
Furnace Motor Current Draw (Amp/Watts) vs. External Static pressure (in. WC.)
Low
1.8/141
1.9/148
2.0/154
2.0/160
2.2/168
2.2/175
2.3/181
ML
2.6/207
2.7/213
2.8/222
2.8/228
2.9/238
3.0/245
3.1/257
Med
3.4/283
3.5/293
3.6/301
3.7/310
3.8/318
3.9/326
4.0/334
MH
5.1/442
5.2/451
5.3/460
5.4/466
5.5/480
5.6/487
5.7/496
HIGH
6.8/593
6.8/603
7.0/613
7.1/624
7.2/631
7.3/642
7.9/655
Speed Tap\
Static Pressure
Temperature Rise vs. External Static pressure (in. WC.)
0.1
0.2
0.3
0.4
0.5
0.6
0.7
Low
69
70
72
77
83
93
103
ML
56
58
61
64
66
69
74
Med
50
52
53
55
58
59
62
MH
42
43
44
46
47
48
50
HIGH
38
39
40
41
42
42
43