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Performance Data
Table 10. Belt drive evaporator fan performance - 7.5 tons standard efficiency with gas heat - YSC090H3,4,W low &
medium gas heat - horizontal airflow
.10
.20
cfm
rpm bhp rpm bhp rpm bhp rpm bhp rpm bhp rpm bhp rpm bhp rpm bhp rpm
1-hp Standard Motor & Field Supplied Low Static Drive
2400
739
0.61
783
0.69
2700
821
0.85
861
0.94
3000
904
1.14
940
1.24
3300
987
1.49 1020 1.60 1052 1.71 1083 1.82 1113 1.93 1144 2.04 1174 2.16 1203 2.27 1230
3600
1071 1.92 1101 2.04 1131 2.15 1160 2.27 1188 2.39 1216 2.51 1244 2.64 1272 2.76 1298
3-hp Oversized Motor & Drive
Continued
1.10
1.20
cfm
rpm bhp rpm bhp rpm bhp rpm bhp rpm bhp rpm bhp rpm bhp rpm bhp rpm
2400
1110 1.46 1140 1.55 1169 1.64 1198 1.73 1225 1.82 1251 1.91 1277 2.01 1301 2.10 1326
2700
1165 1.78 1195 1.88 1223 1.98 1251 2.08 1277 2.18 1304 2.29 1330 2.39 1355 2.49 1378
3000
1224 2.17 1252 2.28 1279 2.39 1306 2.49 1332 2.60 1358 2.71 1383 2.83 1407 2.94 1430
3300
1283 2.61 1311 2.73 1338 2.85 1364 2.97 1389 3.09 1413 3.21 1439 3.33
3600
1349 3.13 1373 3.25 1398 3.38
3-hp Oversized Motor & Field Supplied High Static Drive
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.
(a) Field Supplied Fan Sheave AK74 and Belt AX35
(b) Field Supplied Fan Sheave BK52 and Belt BX30
10
External Static Pressure (Inches of Water)
.30
.40
.50
825
0.77
866
0.85
903
898
1.03
935
1.12
972
974
1.34 1008 1.44 1042 1.54 1075 1.65 1105 1.74 1135 1.85 1164
External Static Pressure (Inches of Water)
1.30
1.40
1.50
3-hp Oversized Motor & Drive
—
—
—
.60
.70
(a)
1-hp Standard Motor & Drive
0.93
941
1.02
978
1.11 1013 1.20 1046
1.21 1005 1.30 1038 1.39 1072 1.49 1104
3-hp Oversized Motor & Field Supplied
1.60
1.70
—
—
—
—
—
(b)
.80
.90
bhp
rpm
1.28
1078
1.59
1135
1.95
1195
2.38
1257
2.88
1323
1.80
1.90
bhp
rpm
2.19
1350
2.59
1402
3.05
1454
—
—
—
—
—
—
—
—
—
—
RT-SVF55F-EN
1.00
bhp
1.37
1.69
2.06
2.49
3.00
Drive(b)
2.00
bhp
2.28
2.70
3.16
—
—
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