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OH8FA119D60
ALTERATIONS REQ’D FOR A/C @ DESIGN EXTERNAL STATIC PRESSURE
COOLING UNIT
HTG Speed by Input
Low Mid High
Fire Fire Fire
Recommended CLG Speed
36,000
L/ML
ML/MH
MH/H
Low (L)
42,000
L/ML
ML/MH
MH/H
Med Low (ML)
48,000
L/ML
ML/MH
MH/H
Med High (MH)
60,000
L/ML
ML/MH
MH/H
High (H)
Figure 19B: Heating speed by input
Speed vs. color code for PSC Motor:
Low = Red
Med-Low = Blue
Med-High = Yellow
High = Black
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
1254
1254
1251
1246
1221
1189
1126
ML
1473
1464
1460
1437
1415
1377
1329
MH
1733
1731
1718
1705
1686
1660
1627
High
2300
2243
2224
2166
2099
2048
1754
Furnace Motor Current Draw (Amps)/Watts vs. External Static pressure (in. WC.)
Low
6.6/648
6.6/648
6.4/639
6.2/630
6.0/612
5.8/592
5.4/565
ML
7.6/772
7.2/739
7.1/730
6.8/704
6.6/683
6.3/661
6.1/641
MH
9.0/908
9.0/905
8.7/888
8.5/871
8.3/842
8.0/818
7.7/796
High
12.5/1270
11.7/1200
11.2/1150
10.7/1110
10.2/1060
9.7/1020
9.2/969
Speed Tap\ Static
Pressure
High Fire Temperature Rise vs. External Static pressure (in. WC.)
0.1
0.2
0.3
0.4
0.5
0.6
0.7
Low
98
98
98
99
101
103
109
ML
83
84
84
86
87
89
93
MH
71
71
72
72
73
74
76
High
53
55
55
57
59
60
70
Speed Tap\ Static
Pressure
Mid Fire Temperature Rise vs. External Static pressure (in. WC.)
0.1
0.2
0.3
0.4
0.5
0.6
0.7
Low
88
88
88
89
90
93
98
ML
75
75
75
77
78
80
83
MH
64
64
64
65
65
66
68
High
48
49
50
51
52
54
63
Speed Tap\ Static
Pressure
Low Fire Temperature Rise vs. External Static pressure (in. WC.)
0.1
0.2
0.3
0.4
0.5
0.6
0.7
Low
75
75
75
75
77
79
83
ML
64
64
64
65
66
68
70
MH
54
54
55
55
56
56
58
High
41
42
42
43
45
46
53