Trane OXBOX J4AH4P Series Installation Instructions Manual page 13

Model Motor
Number Speed
CFM
Low Watts
Current/A
CFM
42 Medium Watts
Current/A
CFM
High Power/W
Current/A
CFM
Low Watts
Current/A
CFM
48 Medium Watts
Current/A
CFM
High Power/W
Current/A
CFM
Low Watts
Current/A
CFM
60 Medium Watts
Current/A
CFM
High Power/W
Current/A
--- Shaded boxes represent airflow outside the required 300-450 cfm/ton.
NOTES: Airflow based upon cooling performance at 230V with no electric heat and no filter.
The air distribution system has the greatest effect on airflow. The duct system is totally controlled by the contractor. For this reason, the contractor
should use only industry-recognized procedures.
Heat pump systems require a specified airflow for electric heat operating. Each ton of cooling requires between 350 and 450 cubic feet of air per
minute (CFM), or 400 CFM nominally.
Duct design and construction should be carefully done. System performance can be lowered dramatically through bad planning or workmanship.
Air supply diffusers must be selected and located carefully. They must be sized and positioned to deliver treated air along the perimeter of the
space. If they are too small for their intended airflow, they become noisy. If they are not located properly, they cause drafts. Return air grilles must
be properly sized to carry air back to the blower. If they are too small, they also cause noise.
The installers should balance the air distribution system to ensure proper quiet airflow to all rooms in the home. This ensures a comfortable living
space.
An air velocity meter or airflow hood can be used to balance and verify branch and system airflow (CFM).
IMPORTANT:
1. If unit is converted to downflow, the airflow for model 18 must be between 350 and 450 cfm/ton.
2. When model 44 used for mobile home, you need to ensure that the air volume is not less than 1335 CFM.
3. When model 48 used for mobile home, you need to ensure that the air volume is not less than 1584 CFM.
CFM Wet Coil without filter and Electric Heat
0[0] 0.1[.025] 0.2[.050]
1272 1240 1202
460 450 440
1.99 1.95 1.90
1570 1534 1490
515 504 492
2.26 2.20 2.15
1780 1746 1704
641 626 610
2.79 2.72 2.65
1336 1310 1282
492 483 474
2.24 2.22 2.17
1654 1610 1569
550 537 526
2.40 2.38 2.35
1918 1875 1817
717 703 686
3.20 3.18 3.14
1693
1726 1655
639
658
678
2.95 2.78
2.87
1983 1879
1933
695
675 655
3.02 2.93 2.85
2138 2024
2086
793 751
773
3.45 3.27
3.37
External Static Pressure-Inches W.C.[kPa]
0.3[.075] 0.4[0.100] 0.5[0.125] 0.6[0.150] 0.7[0.175] 0.8[0.200]
1157 1114
431 424
1.86 1.83
1442 1387
479 470
2.09 2.04
1647 1570
594 577
2.58 2.5
1234 1182
463 452
2.13 2.10
1510 1461
512 503
2.32 2.30
1771 1715
670 652
3.10 3.04
1637
1584
602
619
2.62
2.69
1760
1828
615
635
2.76 2.67
1873
1952
702
726
3.06
3.17
11
1066 912 850.3
410 374 364
1.77 1.62 1.57
1335 1278 1208
458 445 429
1.99 1.93
1.86
1537 1405 1220
561 536 501
2.43 2.36 2.28
1140 1049 925
443 422 393
1.93 2.03 1.90
1394 1350 1265
489 475 458
2.18 2.16 2.08
1651 1584 1511
635 617 600
3.00 2.90 2.87
1421 1328
1500
576
553 526
2.52
2.42 2.31
1685
1597 1507
596
574 550
2.59 2.5 2.4
1797
1722 1646
679
658 638
2.97
2.88 2.79
792
350
1.51
977
384
1.66
1166
469
2.03
833
374
1.87
1034
416
2.04
1395
570
2.85
1217
495
2.18
1403
522
2.28
1516
604
2.65