33
For PSC systems, the ½ hp motor is equipped with 4 speeds. The unit is set for mid-fire temp rise @
65ºF. See table for proper blower motor set up:
OH6FA072D48
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
24,000
Low ML
MH
Low
30,000
Low ML
MH
Med
Low
36,000
Low ML
MH
Med
High
42,000
Low ML
MH
Med
High
48,000
Low ML
MH
High
Figure 19A: Heating speed by input
Furnace Airflow (CFM) vs. External Static pressure (in. WC.)
Speed Tap\ Static
Pressure
0.1 0.2 0.3 0.4 0.5 0.6 0.7
Low
930 915 912 910 822 774 730
ML
1155 1152 1130 1126 1085 1042 920
MH
1442 1432 1418 1382 1334 1293 1230
High
1802 1762 1705 1635 1569 1493 1428
Furnace Motor Current Draw (Amps) vs. External Static pressure (in. WC.)
Low
3.3 3.1 3.0 2.9 2.6 2.5 2.4
ML
4.2 4.0 3.9 3.7 3.6 3.3 3.0
MH
5.4 5.2 5.0 4.7 4.4 4.2 4.0
High
6.6 6.4 6.0 5.7 5.5 5.2 5.0
High Fire Temperature Rise vs. External Static pressure (in. WC.)
Speed Tap\ Static
Pressure
0.1 0.2 0.3 0.4 0.5 0.6 0.7
Low
90 91 91 92 101 108 114
ML
72
72
74
74
77
80
91
MH
58
58
59
60
62
64
68
High
46 47 49 51 53 56
58
Mid Fire Temperature Rise vs. External Static pressure (in. WC.)
Speed Tap\ Static
Pressure
0.1 0.2 0.3 0.4 0.5 0.6 0.7
Low
72
73
73
73
81
86
91
ML
58
58
59
59
61
64
72
MH
46 47 47 48 50 52 54
High
37 38 39 41 42 45 47
Low Fire Temperature Rise vs. External Static pressure (in. WC.)
Speed Tap\ Static
Pressure
0.1 0.2 0.3 0.4 0.5 0.6 0.7
Low
60
61
61
61
68
72
76
ML
48 48 49 49 51 53 60
MH
39 39 39 40 42 43 45
High
31 32 33 34 35 37 39
Содержание OH6FA072D48N
Страница 5: ...2...
Страница 33: ...30 Heating Speed Set ups 2 Stage OH6FX072DV4 Figure 18 2 ECM 2 stage blower motor speed chart...
Страница 64: ...61 VIII Sequence of Operations Flow Chart...
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Страница 66: ...63 IX Trouble Shooting Flow Chart...
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Страница 72: ...69 Appendix A Replacement Parts Replacement Parts for OH6FA072D...
Страница 73: ...70 Replacement Parts for OH8FA119D...
Страница 74: ...71 Appendix B Wiring Diagrams OH6FA072D48 PSC Wiring Diagram...
Страница 75: ...72 OH6FA072DV4 ECM Wiring Diagram...
Страница 76: ...73 OH6FX072DV4 ECM 2 Stage Wiring Diagram...
Страница 77: ...74 OH8FA1119D60 PSC Wiring Diagram...
Страница 78: ...75 OH8FA1119DV5 ECM Wiring Diagram...
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