Check-Out Procedures - Lennox CBA25UH Installation Instructions Manual

NOTE - Refer to wiring diagram located on the
unit
ance (table 2).
All air data measured external to unit with 1
inch non-pleated air filter in place.
All factory settings are medium speed.
All data given while air handler is operating
with a dry DX coil.
All downflow applications run on high speed
when utilizing electric heat.
TABLE 2. CBA25UH Blower Performance (3-Speed PSC) – 240V (CFM @ ESP. – in. W. C.)
Air Handler
Blower Speed
Model
Low (Red)
Med (Blue)
-018
High (Black)
Low (Red)
Med (Blue)
-024
High (Black)
Low (Red)
Med (Blue)
-030
High (Black)
Low (Red)
Med (Blue)
-036
High (Black)
Low (Red)
Med (Blue)
-042
High (Black)
Low (Red)
Med (Blue)
-048
High (Black)
Low (Red)
Med (Blue)
-060
High (Black)
• Blower Performance (CFM vs. ESP inches H
• Cooling speeds should not be reduced below factory setting.
• All units with electric heat approved at 0.5" maximum and medium blower speed minimum.
• All downflow applications run on high speed when utilizing electric heat.

Check-out Procedures

NOTE – Refer to outdoor unit installation instructions for sys-
tem start-up instructions and refrigerant charging instructions.
PRE-START-UP CHECKS
• Is the air handler properly and securely installed?
• If horizontally configured, is the unit sloped up to 5/8
inch toward drain lines?
• Will the unit be accessible for servicing?
• Has an auxiliary pan been provided under the unit with
separate drain for units installed above a finished ceil-
ing or in any installation where condensate overflow
could cause damage?
BLOWER RELAY
5
2
FIGURE 16. Changing Blower Speed
.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
0)
2
• Have ALL unused drain pan ports been properly
• Has the condensate line been properly sized, run,
• Is the duct system correctly sized, run, sealed, and in-
• Have all cabinet openings and wiring been sealed?
• Is the indoor coil factory-installed TXV properly sized for
• Have all unused parts and packaging been disposed
• Is the filter clean, in place, and of adequate size?
Page 16
BLOWER RELAY
HARNESS
BLUE (MED)
4-PIN
BLOWER CONNECTOR
.30" WC
475
630
820
615
850
1070
830
1030
1170
1000
1205
1390
1300
1440
1690
1645
1800
1850
1580
1875
2000
plugged?
trapped, pitched, and tested?
sulated?
the outdoor unit being used?
of?
PLASTIC CAPS
RED (L0)
BLACK (HI)
YELLOW (COM)
.40" WC .50" WC
420 325
595 505
770 705
610 580
820 780
1010 950
780 740
985 940
1135 1085
950 900
1145 1085
1320 1245
1275 1225
1395 1315
1600 1500
1565 1470
1685 1560
1719 1595
1520 1450
1800 1695
1895 1795