30
Table 26 — Fan Performance — 50PG28 — Horizontal Supply/Return Units
LEGEND
Boldface indicates field-supplied motor/drive required.
NOTES:
1. Motor drive ranges:
(E) Low Range: 687-873, 5.75 Bhp
(F) Mid-Low Range: 805-1007, 5,75 Bhp
(G) Mid-High Range: 941-1176, 8.63 Bhp
(H) High Range: 1014-1297, 11.50 Bhp
All other rpms require field-supplied motor or drive.
2. See below for general fan performance notes.
GENERAL NOTES FOR FAN PERFORMANCE DATA TABLES
1. Static pressure losses from accessories and options (Humidi-MiZer™,
economizer, etc.) must be added to external static pressure before enter-
ing Fan Performance table. Refer to Tables 31 and 32 for Accessory/
FIOP Static Pressure information.
2. Extensive motor and electrical testing on these units ensures that the full
range of the motor can be utilized with confidence. Using the fan motors
up to the bhp ratings shown will not result in nuisance tripping or prema-
ture motor failure. Unit warranty will not be affected. See Tables 29 and
30 (Evaporator-Fan Motor Specifications) on page 31 and 32 for addi-
tional information.
3. Use of a field-supplied motor may affect wire sizing. Contact your local
Carrier representative for details.
4. Interpolation is permissible. Do not extrapolate.
Table 27 — Air Quantity Limits (48PG20-28 Units)
*7000 cfm minimum recommended above 1.0 in. wg external static pressure.
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
6,500 759 2.89 804 3.17 844 3.42 883 3.68 922 3.96
7,000 810 3.47 853 3.77 891 4.04 928 4.30 964 4.58
7,500 862 4.12 903 4.43 939 4.72 974 5.00 1008 5.29
8,000 913 4.84 953 5.18 988 5.48 1021 5.77 1053 6.07
8,500 965 5.63 1003 5.99 1037 6.32 1069 6.62 1100 6.93
9,000 1017 6.50 1054 6.89 1087 7.23 1118 7.55 1147 7.87
9,500 1069 7.45 1105 7.86 1137 8.22 1167 8.56 1195 8.89
10,000 1121 8.48 1156 8.92 1187 9.30 1216 9.66 1243 10.01
10,500 1173 9.60 1207 10.06 1238 10.47 1266 10.85 1292 11.21
11,000 1226 10.81 1259 11.30 1288 11.72 1316 12.12 1342 12.50
11,500 1278 12.11 1310 12.62 1339 13.07 1366 13.49 ——
12,000 1331 13.51 ————————
12,500 ——————————
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
6,500 962 4.27 1003 4.61 1045 4.98 1090 5.41 1135 5.87
7,000 1000 4.88 1037 5.21 1075 5.56 1115 5.95 1155 6.38
7,500 1041 5.58 1075 5.90 1110 6.24 1145 6.61 1182 7.01
8,000 1085 6.37 1116 6.68 1148 7.01 1180 7.36 1214 7.74
8,500 1129 7.23 1159 7.55 1189 7.88 1219 8.22 1249 8.59
9,000 1175 8.18 1204 8.50 1232 8.83 1260 9.18 1288 9.53
9,500 1222 9.22 1249 9.55 1276 9.88 1302 10.22 1329 10.58
10,000 1270 10.34 1296 10.68 1321 11.02 1346 11.37 1371 11.72
10,500 1318 11.56 1343 11.90 1367 12.25 1391 12.61 ——
11,000 1366 12.86 1390 13.22 ——————
11,500 ——————————
12,000 ——————————
12,500 ——————————
Bhp — Brake Horsepower Input to Fan
48PG
COOLING
GAS HEAT
HEATING
(NAT. GAS,
VERTICAL)
MINIMUM CFM
HEATING
(NAT. GAS,
HORIZONTAL)
MINIMUM CFM
HEATING
(PROPANE,
VERTICAL)
MINIMUM CFM
HEATING
(PROPANE,
HORIZONTAL)
MINIMUM CFM
Minimum Cfm Maximum Cfm
20 5000 9,000
High Heat (8 Cell) 5522 5522 5522 4920
Medium Heat (8 Cell) 4977 4977 4480 4480
Low Heat (5 Cell) 4218 4218 4218 3796
24 5500 10,000
High Heat (8 Cell) 5522 5522 5522 4920
Medium Heat (8 Cell) 4977 4977 4480 4480
Low Heat (5 Cell) 4218 4218 4218 3796
28 6500 12,000
High Heat (8 Cell) 5522 5470* 5522 4920*
Medium Heat (8 Cell) 4977 4977* 4480 4480*
Low Heat (5 Cell) 4218 4218 4218 3796
H
G
F
E
E
E
F
F
F
F
G
G
G
G
H
H
H
H
F
F
G
G
G
G
G
H
H
H
H
H
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