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Table 21 — Fan Performance, 48AJ,AK040,050 — Vertical Discharge Units
LEGEND
Bhp — Brake Horsepower
NOTES:
1. Fan performance is based on wet coils, economizer, roof curb,
cabinet losses, and clean 2-in. filters.
2. Conversion — Bhp to watts:
3. Variable Air Volume units will operate down to 70 cfm/ton. Per-
formance at 70 cfm/ton is limited to unloaded operation and
may be additionally limited by edb (entering dry bulb) and ewb
(entering wet bulb) conditions.
AIRFLOW
(Cfm)
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)
0.20.40.60.81.01.21.41.6
Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp
8,000 512 2.98 560 3.38 604 3.79 647 4.20 688 4.62 728 5.05 766 5.49 803 5.94
9,000 561 3.90 604 4.33 645 4.77 685 5.20 723 5.65 760 6.10 796 6.55 831 7.02
10,000 611 5.00 651 5.45 689 5.91 725 6.37 761 6.84 795 7.31 829 7.79 861 8.27
11,000 662 6.27 699 6.75 734 7.23 768 7.72 801 8.21 833 8.71 865 9.20 895 9.71
12,000 714 7.74 748 8.24 780 8.75 812 9.26 843 9.77 873 10.29 903 10.81 932 11.33
13,000 766 9.41 798 9.93 828 10.46 858 11.00 887 11.54 916 12.08 944 12.62 971 13.16
14,000 819 11.29 848 11.84 877 12.39 905 12.95 932 13.51 959 14.07 986 14.63 1012 15.20
15,000 872 13.40 899 13.96 926 14.54 953 15.11 979 15.70 1004 16.28 1029 16.87 1054 17.46
16,000 925 15.74 951 16.32 976 16.91 1001 17.51 1026 18.12 1050 18.72 1074 19.33 1097 19.94
17,000 979 18.32 1003 18.92 1027 19.53 1051 20.15 1074 20.77 1097 21.40 1120 22.03 1142 22.66
18,000 1032 21.15 1055 21.77 1078 22.40 1100 23.04 1123 23.68 1145 24.33 1166 24.98 1188 25.63
19,000 1086 24.24 1108 24.88 1129 25.52 1151 26.18 1172 26.84 1193 27.51 1214 28.18 1234 28.85
20,000 1140 27.60 1161 28.25 1181 28.92 1202 29.59 1222 30.27 1242 30.95 1262 31.64 1281 32.33
AIRFLOW
(Cfm)
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)
1.82.02.22.42.62.83.03.2
Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp
8,000 839 6.40 874 6.86 907 7.34 940 7.81 971 8.30 1001 8.79 1030 9.29 1059 9.79
9,000 864 7.49 897 7.97 930 8.46 961 8.95 991 9.46 1021 9.97 1050 10.48 1078 11.00
10,000 893 8.76 925 9.26 955 9.76 985 10.27 1014 10.79 1043 11.31 1071 11.84 1098 12.37
11,000 925 10.21 955 10.73 984 11.25 1012 11.77 1040 12.30 1068 12.84 1095 13.38 1121 13.93
12,000 960 11.86 988 12.39 1016 12.93 1043 13.47 1069 14.02 1095 14.57 1121 15.13 1147 15.69
13,000 998 13.71 1024 14.26 1050 14.82 1076 15.38 1101 15.94 1126 16.51 1151 17.08 1175 17.66
14,000 1037 15.77 1062 16.34 1087 16.92 1111 17.49 1136 18.07 1159 18.66 1183 19.25 1206 19.84
15,000 1078 18.05 1102 18.64 1126 19.23 1149 19.83 1172 20.43 1195 21.03 1217 21.64 1239 22.25
16,000 1121 20.55 1143 21.17 1166 21.78 1188 22.40 1210 23.01 1232 23.64 1253 24.26 1275 24.89
17,000 1164 23.29 1186 23.93 1208 24.56 1229 25.20 1250 25.84 1271 26.48 1291 27.12 — —
18,000 1209 26.28 1230 26.93 1250 27.59 1271 28.25 1291 28.91 — — — — — —
19,000 1255 29.52 1275 30.19 1294 30.87 ——————————
20,000 ————————————————
AIRFLOW
(Cfm)
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)
3.43.63.84.0
Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp
8,000 1086 10.29 1113 10.80 1139 11.31 1164 11.83
9,000 1105 11.52 1131 12.05 1157 12.58 1183 13.12
10,000 1125 12.91 1151 13.46 1177 14.01 1202 14.56
11,000 1147 14.49 1172 15.05 1197 15.61 1222 16.18
12,000 1172 16.26 1196 16.83 1220 17.41 1244 18.00
13,000 1199 18.24 1223 18.83 1246 19.42 1269 20.02
14,000 1229 20.44 1252 21.04 1274 21.64 1296 22.25
15,000 1261 22.86 1283 23.48 — — — —
16,000 129625.52——————
17,000 ————————
18,000 ————————
19,000 ————————
20,000 ————————
Watts =
Bhp x 746
Motor Efficiency