10
AIRFLOW PERFORMANCE TABLES
Table 1 – Airflow Performance (CFM)
MODEL & SIZE
BLOWER SPEED
EXTERNAL STATIC (in. wc)
0.10
0.20
0.30
0.40
0.50
0.60
PF4MNB 019
Tap 5
776
745
696
660
609
572
Tap 4
683
644
589
548
494
461
Tap 3
683
644
589
548
494
461
Tap 2
631
563
500
443
409
361
Tap 1
625
524
457
417
367
319
PF4MNB 025
Tap 5
956
920
891
851
816
780
Tap 4
825
795
757
722
674
634
Tap 3
825
795
757
722
674
634
Tap 2
726
695
635
598
543
509
Tap 1
631
563
500
443
409
361
PF4MNB 031
Tap 5
1189
1151
1104
1050
1003
959
Tap 4
1041
998
944
886
837
772
Tap 3
1041
998
944
886
837
772
Tap 2
924
876
817
752
704
660
Tap 1
779
693
628
571
526
476
PF4MNB 037
Tap 5
1363
1332
1294
1253
1207
1157
Tap 4
1237
1206
1160
1121
1070
1013
Tap 3
1237
1206
1160
1121
1070
1013
Tap 2
1095
1058
1007
951
888
824
Tap 1
1014
885
773
673
609
549
PF4MNB 043
Tap 5
1519
1490
1454
1419
1379
1332
Tap 4
1437
1403
1366
1333
1294
1245
Tap 3
1437
1403
1366
1333
1294
1245
Tap 2
1257
1226
1191
1141
1090
1033
Tap 1
1237
1206
1160
1121
1070
1013
PF4MNB 049
Tap 5
1757
1725
1693
1653
1614
1576
Tap 4
1664
1626
1593
1552
1517
1477
Tap 3
1664
1626
1593
1552
1517
1477
Tap 2
1459
1420
1379
1336
1298
1259
Tap 1
1301
1241
1195
1150
1102
1039
PF4MNB 061
Tap 5
2030
1995
1961
1927
1888
1842
Tap 4
1811
1775
1740
1703
1664
1613
Tap 3
1811
1775
1740
1703
1664
1613
Tap 2
1665
1632
1593
1556
1507
1453
Tap 1
1462
1418
1371
1327
1278
1228
--- Shading --- Airflow outside 450 cfm/ton.
NOTES
:
1. Airflow based upon dry coil at 230v with factory approved filter and electric heater (2 element heater sizes 019 through 037, 3 element heater sizes
043 through 061).
2. Airflow at 208 volts is approximately the same as 230 volts because the multi---tap ECM motor is a constant torque motor. The torque doesn’t drop
off at the speeds the motor operates.
3. To avoid potential for condensate blowing out of drain pan prior to making drain trap:
Return static pressure must be less than 0.40 in. wc.
Horizontal applications of 043 --- 061 sizes must have supply static greater than 0.20 in. wc.
4. Airflow above 400 cfm/ton on 049 --- 061 size could result in condensate blowing off coil or splashing out of drain pan.
PF4M
NB