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18-CE12D1-1D-EN
Setting Airflow
With all ductwork connected and a clean filter in place, measure the
External Static Pressure (ESP) of the unit in locations below. Use the
appropriate airflow table for the furnace and outdoor unit installed.
Note:
Airflow tables are located in the Service Facts literature.
Measurements must be made prior to the evaporator coil, if equipped,
and after the filter.
Note:
Check out fieldtechhelp.com to watch a short video.
Evaporator
Coil
Clean
Filter
S9X1/S9B1/S9X2 B080U4 Furnace Airflow (CFM) at. External Static Pressure (in. W.C.) versus Tap
Static
0.1
0.3
0.5
0.7
0.9
Tap
Torque (%)
1
20
SCFM
911
766
622
477
332
Watts
94
104
115
125
136
2
31
SCFM
1075
963
851
740
628
Watts
139
153
168
182
197
3
40
SCFM
1215
1121
1028
934
840
Watts
185
202
219
236
253
4
43
SCFM
1250
1164
1077
(a)
990
903
Watts
203
221
239
257
274
5
51
SCFM
1349
1272
1194
1116
(b)
1039
Watts
251
271
291
310
330
6
61
SCFM
1453
1387
1321
1254
1188
Watts
313
335
356
378
400
7
64
SCFM
1505
1438
1372
1305
1239
Watts
340
362
384
406
427
8
78
SCFM
1657
1597
1538
1479
1419
Watts
453
477
500
524
547
9
100
SCFM
1878
1815
1752
1690
1627
Watts
669
686
702
718
735
This is an example Airflow Table only. See Service Facts for complete airflow data.
(a)
Example 2
(b)
Example 1