Table 9.
Belt drive evaporator fan performance - 7.5 tons standard efficiency with gas heat - YSC090H3,4,W low &
medium gas heat downflow airflow
External Static Pressure (Inches of Water)
.10
.20
.30
.40
.50
.60
.70
.80
.90
1.00
cfm
rpm bhp rpm bhp rpm bhp rpm bhp rpm bhp rpm bhp rpm bhp rpm bhp rpm
bhp
rpm
bhp
1-hp Standard Motor & Field Supplied Low Static Drive
(a)
(a) Field Supplied Fan Sheave AK74 and Belt AX35
1-hp Standard Motor & Drive
2400
655 0.47 707
0.55
758
0.64
802
0.72
845 0.80 886
0.88
925
0.97
961
1.05
997
1.14
1028
1.22
2700
724 0.64 770
0.73
817
0.83
861
0.92
900 1.02 939
1.11
976
1.20 1011 1.30 1045
1.39
1077
1.49
3000
794 0.86 837
0.96
878
1.06
920
1.17
958 1.27 994
1.38 1029 1.48 1063 1.58 1096
1.69
1128
1.79
3300
865 1.12 905
1.23
942
1.34
980
1.45 1018 1.57 1053 1.69 1085 1.80 1117 1.92 1148
2.03
1179
2.14
3600
937 1.43 973
1.55 1008 1.67 1042 1.79 1077 1.91 1112 2.05 1144 2.18 1174 2.30 1203
2.42
1232
2.55
3-hp Oversized Motor & Drive
Continued
External Static Pressure (Inches of Water)
1.10
1.20
1.30
1.40
1.50
1.60
1.70
1.80
1.90
2.00
cfm
rpm bhp rpm bhp rpm bhp rpm bhp rpm bhp rpm bhp rpm bhp rpm bhp rpm
bhp
rpm
bhp
1-hp Standard Motor & Drive
2400 1060 1.30 1091 1.39 1120 1.48 1150 1.57 1178 1.65 1204 1.74 1231 1.83 1256 1.91 1281
2.00
1304
2.09
2700 1109 1.58 1139 1.68 1167 1.77 1195 1.86 1223 1.96 1249 2.06 1275 2.16 1301 2.26 1325
2.35
1349
2.45
3000 1158 1.90 1188 2.00 1216 2.11 1244 2.21 1271 2.32 1296 2.42 1321 2.53 1346 2.64 1371
2.75
1393
2.85
3300 1209 2.26 1238 2.37 1265 2.49 1293 2.61 1319 2.72 1344 2.84 1369 2.95 1393 3.07 1416
3.18
1441
3.30
3600 1261 2.67 1289 2.80 1316 2.92 1342 3.04 1368 3.17 1393 3.30 1419 3.43
—
—
—
—
—
—
3-hp Oversized Motor & Field Supplied High Static Drive
(b)
(b) Field Supplied Fan Sheave BK52 and Belt BX30
Notes:
1.
For standard evaporator fan speed (rpm), reference the standard motor and sheave/fan speed applicable table in the fan performance section.
2.
Data includes pressure drop due to standard filters and wet coils. No accessories or options are included in pressure drop data.
3.
1-hp Fan Motor Heat (MBh) = 2.829 x Fan bhp+.4024. 3-hp Fan Motor Heat (MBh) = 2.900 x Fan bhp+.4750
4.
Factory supplied motors, in commercial equipment, are definite purpose motors, specifically designed and tested to operate reliably and continuously
at all cataloged conditions. Using the full horsepower range of our fan motors as shown in our tabular data will not result in nuisance tripping or
premature motor failure. Our product's warranty will not be affected.
Performance Data
RT-SVF55F-EN
9
