18-CE09D1-1E-EN
53
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.
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
Furnace Airflow (CFM) Vs. External Static Pressure (in. W.C.)
Model
Tap
0.1
0.3
0.5
0.7
0.9
S8B1B080M4PSAB
1
633
297
—
—
—
2
957
800
719
428
213
3
1220
1080
940
800
660
4
1403
1298
1192
1087
981
5
1524
1428
1336
1248
1164
6
1684
1574
1544
1401
1337
7
1700
1625
1551
1476
1401
8
1858
1790
1723
1656
1589
9
1967
1898
1829
1760
1691
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B1
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Cooling / HP
•
4 Ton Single Stage Outdoor
•
Total ESP = 0.7” W.C.
•
Required Airflow = 1400 cfm (4T x 350 cfm/ton)
•
New Tap Number = Tap 6
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