Lennox CBX25UH Series Installation And Service Procedure page 5

Table 1. Blower Performance (3-Speed PSC) - 240V (CFM @ ESP. - in. W. C.)
Air Handler
Blower Speed
Model
Low (Red)
18 Med (Blue)
High (Black)
Low (Red)
Med (Blue)
24
High (Black)
Low (Red)
Med (Blue)
30
High (Black)
Low (Red)
Med (Blue)
36
High (Black)
Low (Red)
42 Med (Blue)
High (Black)
Low (Red)
48 Med (Blue)
High (Black)
Low (Red)
Med (Blue)
60
High (Black)
NOTE — Refer to wiring diagram located on the unit access panel and blower performance (table 1).
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All air data measured external to unit with 1 inch
non-pleated air filter in place.
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All factory settings are medium speed except the -48
which is set to low speed from the factory.
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All data given while air handler is operating with a dry
DX coil.
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Blower Performance (CFM vs. ESP inches H2O)
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Cooling speeds should not be reduced below factory
setting.
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Units with electric heat approved at 0.5" maximum and
medium blower speed minimum.
.10" WC .20" WC
510 495
670 650
905 865
630 625
885 875
1130 1100
900 865
1075 1060
1240 1210
1075 1040
1300 1250
1510 1450
1325 1315
1490 1465
1820 1770
1775 1710
1995 1895
2070 1970
1675 1630
1965 1925
2140 2085
Page 5
.30" WC .40" WC
475 420
630 595
820 770
615 610
850 820
1070 1010
830 780
1030 985
1170 1135
1000 950
1205 1145
1390 1320
1300 1275
1440 1395
1690 1600
1645 1565
1800 1685
1850 1719
1580 1520
1875 1800
2000 1895
ELECTRIC HEAT SECTION
(PLATE TO BE REMOVED IF
INSTALLED)
CONTROL BOX
BLOWER COMPARTMENT
HORIZONTAL DRAIN PAN
COIL
EXPANSION VALVE (R-22
OR R-410A)
UP-FLOW DRAIN PAN
Figure 2. Unit Parts Arrangement
.50" WC
325
505
705
580
780
950
740
940
1085
900
1085
1245
1225
1315
1500
1470
1560
1595
1450
1695
1795