16
Table 12 — Fan Performance — 50PG20 — Vertical Supply/Return Units
LEGEND
Boldface indicates field-supplied drive required.
NOTES:
1. Motor drive ranges:
(A) Low Range: 685-939, 4.26 Bhp (208/230 and 460-v), 751-954,
5.75 Bhp 4 (575-v)
(B) Mid-Low Range: 949-1206, 5.75 Bhp
(C) Mid-High Range: 941-1176, 8.63 Bhp
(D) High Range: 1014-1297, 11.50 Bhp
All other rpms require field-supplied drive.
2. See page 30 for general fan performance notes.
AIRFLOW
(Cfm)
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)
0.2 0.4 0.6 0.8 1.0
Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp
5000 533 1.27 611 1.54 682 1.82 748 2.10 808 2.37
5500 571 1.57 643 1.86 711 2.15 773 2.44 832 2.73
6000 610 1.92 676 2.21 740 2.52 800 2.82 857 3.13
6500 650 2.31 712 2.61 772 2.93 829 3.25 883 3.58
7000 691 2.75 748 3.06 805 3.39 859 3.73 911 4.07
7500 732 3.24 786 3.57 839 3.91 891 4.25 941 4.61
8000 775 3.79 824 4.12 874 4.47 924 4.83 972 5.19
8500 817 4.40 863 4.74 911 5.09 958 5.46 1003 5.84
9000 860 5.06 904 5.41 948 5.77 993 6.15 1036 6.54
AIRFLOW
(Cfm)
AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)
1.2 1.4 1.6 1.8 2.0
Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp
5000 865 2.64 918 2.91 969 3.17 1018 3.44 1065 3.70
5500 886 3.02 938 3.31 988 3.59 1035 3.87 1081 4.16
6000 910 3.44 960 3.74 1008 4.05 1054 4.35 1099 4.65
6500 935 3.90 984 4.22 1030 4.54 1075 4.86 1118 5.18
7000 961 4.40 1008 4.74 1054 5.08 1098 5.41 1140 5.75
7500 989 4.96 1035 5.31 1079 5.66 1122 6.01 1163 6.36
8000 1018 5.56 1062 5.93 1105 6.29 1147 6.66 1187 7.02
8500 1048 6.22 1091 6.60 1133 6.98 1173 7.36 1212 7.73
9000 1079 6.93 1121 7.32 1161 7.71 1201 8.11 1239 8.50
Bhp — Brake Horsepower Input to Fan
A
C
A
A
A
A
B
B
C
C
D
A
A
B
B
BB
B
C
C
C
C
C
D
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