A801X-SVX001-1B-EN
47
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: See Airflow Tables section in this document.
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.
Evaporato
r
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
A801X080BM4S
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
This is an Example Airflow Table only. See “Airflow Tables,” p. 16 for complete Airflow data.
EExxaammppllee 11:: AA880011XX ((DDeeffaauulltt TTaapp 77))
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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