Air Volume Adjustment - Lennox Elite CBX32M-024 Installation Instructions Manual

Seal the unit so that warm air is not allowed into the
cabinet. Warm air introduces moisture, which results in
water blow-off problems. This is especially important when
the unit is installed in an unconditioned area,
Make sure the liquid line and suction line entry points are
sealed with either the provided flexible elastomeric thermal
insulation, or field provided material (e.g. Armaflex,
Permagum or equivalent). Any of the previously mention
materials may be used to seal around the main and
auxiliary drains, and around open areas of electrical inlets.
MINIMUM BLOWER SPEEDS (WITH ELECTRIC
HEATERS)
For the minimum allowable speed for the CBX32M series
units with electric heat, refer to the ECB29 installation
instructions.
Table 4.
AIR VOLUME ADJUSTMENT
Blower speed selection is accomplished by changing the
taps at the harness connector at the Blower motor as
illustrated in figure 16. Refer to unit wiring diagram in figure
15 on page 11. Refer to tables 4 through 9 for air handler
)erformance data,
HARNESS
CONNECTOR
F
PRESS THE TAB TO RELEASE WIRE CONNECTOR.
SELECT CONNECTOR LOCATION FOR NEW SPEED.
INSERT WIRE UNTIL IT CLICKS.
Figure 16. Blower Speed Tap Selection
CBX32M-018/024 Air Handler Pe_ormance (208/230V)
Air Volume and Motor Watts at Specific Blower Taps
Low Medium
L/s Wat_ cfm L/s Wat_ cfm
330 245 895 425 300 1030
330 245 890 420 295 1015
325 240 875 415 290 1000
320 235 860 405 285 980
315 230 845 400 280 960
310 220 825 390 275 935
300 215 800 380 265 910
280 205 745 355 250 850
255 190 685 320 235 780
220 175 605 285 220 705
185 165 520 245 200 615
165 155 475 225 195 565
unit with air fil_r in place. Ele_ric hea_ have no app_ciable air
Table 5. CBX32M-030 Air Handler Performance (208/230V)
Air Volume and Motor Wat_ at Specific Blower Taps
Low Medium
L/s Wat_ cfm L/s Wat_ cfm
490 315 1175 555 335 1290
505 310 1190 560 330 1295
515 300 1190 560 325 1290
510 295 1175 555 320 1265
505 285 1145 540 310 1230
485 270 1105 520 295 1180
460 255 1045 495 280 1115
390 220 890 420 250 945
290 190 675 320 215 720
155 160 405 190 185 440
unit with airfil_rin place. Electric hea_ have no app_ciable air
External Static
Pressure High
in. w.g. Pa cfm L/s Wat_
.00 0 700 485 365
.05 10 695 480 360
.10 25 690 470 355
.15 35 680 465 345
.20 50 665 455 340
.25 60 650 440 335
.30 75 635 430 325
.40 100 590 400 310
.50 125 535 370 295
.60 150 470 330 280
.70 175 395 290 265
.75 185 350 265 255
NOTE - All air dab is measu_d external _sis_nce.
External Static
Pressure High
in. w.g. Pa cfm L/s Wat_
.00 0 1045 610 385
.05 10 1075 610 380
.10 25 1085 610 375
.15 35 1085 600 370
.20 50 1065 580 360
.25 60 1030 555 350
.30 75 980 525 335
.40 100 830 445 305
.50 125 615 340 275
.60 150 335 205 240
NOTE- Allairda_ is measu_d external _sis_nce.
505342M 05/08
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