GDS8 Technical Manual

13
BLOWER PERFORMANCE SPECIFICATIONS
NOTES:
CFM in chart is without filter(s). Filters do not ship with this furnace, but must be provided by the installer.
All furnaces ship as high-speed cooling. Installer must adjust blower cooling speed as needed.
For most jobs, about 400 CFM per ton when cooling is desirable
INSTALLATION IS TO BE ADJUSTED TO OBTAIN TEMPERATURE RISE WITHIN THE RANGE SPECIFIED ON THE RATING PLATE.
The chart is for information only. For satisfactory operation, external static pressure must not exceed values shown on the rating plate. The shaded area
indicates ranges in excess of maximum static pressure allowed when heating.
The dashed (---) areas indicate a temperature rise not recommended for this model.
At higher altitudes, a properly de-rated unit will have approximately the same temperature rise at a particular CFM, while ESP at the CFM will be lower.
GHS8***B*
Tons AC
at 0.5"
ESP CFM RISE CFM RISE CFM RISE CFM RISE CFM RISE CFM RISE CFM RISE CFM RISE
HIGH 3.0 1739 ---- 1656 ---- 1601 ---- 1551 ---- 1513 20 1460 22.8 1413 23.6 1353 24.6
GHS80403A*B* MED 2.5 1422 21 1399 21 1378 22 1350 22 1305 23 1275 26.1 1220 27.3 1178 28.3
MED-LO 2.0 1207 25 1213 24 1197 25 1169 25 1158 26 1131 29.5 1103 30.2 1068 31.2
LOW 1.5 991 30 980 30 958 31 950 31 937 32 924 36.1 910 36.6 874 38.1
HIGH 4.0 2097 21 2068 21 2012 22 1939 23 1869 24 1795 28.9 1718 30.2 1631 31.8
GHS80604B*B* MED 3.5 1596 28 1566 28 1534 29 1492 30 1445 31 1401 37 1354 38.3 1288 40.3
MED-LO 3.0 1380 32 1356 33 1328 33 1303 34 1274 35 1239 41.8 1192 43.5 1127 46
LOW 3.0 1239 36 1191 37 1165 37 1133 39 1104 40 1082 47.9 1040 49.9 996 52.1
HIGH 5.0 2382 ---- 2315 ---- 2234 ---- 2158 ---- 2078 ---- 1971 33.8 1866 35.7 1762 37.8
GHS80805C*B* MED 4.0 1622 37 1603 37 1583 37 1556 38 1516 39 1482 45 1422 46.9 1359 49.1
MED-LO 3.5 1436 41 1391 43 1387 41 1356 44 1325 45 1279 52.1 1239 53.8 1180 56.5
LOW 3.0 1240 48 1214 49 1191 50 1157 51 1120 53 1083 61.6 1052 63.4 1025 65
EXTERNAL STATIC PRESSURE (Inches Water Column)
0.6 0.7 0.8
(CFM & Temperature Rise vs. External Static Pressure)
0.10.20.30.40.5
Model
Motor
Speed