Carrier SINGLE PACKAGE ROOFTOP UNITS 48PG20-28 - Manual (Page 36)

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Table 22 — Fan Performance — 48PGF28 — Horizontal Supply and Return Units
LEGEND
Boldface indicates field-supplied motor/drive required.
NOTES:
1. Motor drive ranges:
(E) Low Range: 687-873 rpm, 5.75 bhp
(F) Mid-Low Range: 805-1007 rpm, 5.75 bhp
(G) Mid-High Range: 941-1176 rpm, 8.63 bhp
(H) High Range: 1014-1297 rpm, 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 (i.e., economizer, electric heat, etc.) must be added
to external static pressure before entering Fan Performance table.
2. Interpolation is permissible. Do not extrapolate.
3. Fan performance is based on wet coils, clean filters, and casing losses.
See Accessory/FIOP Static Pressure information on page 39.
4. Extensive motor and drive testing on these units ensures that the full
horsepower range of the motor can be utilized with confidence. Using the
fan motors up to the bhp rating shown will not result in nuisance tripping or
premature motor failure. Unit warranty will not be affected.
5. Use of a field-supplied motor may affect wire size. Recalculate the unit
power supply MCA and MOCP if required. Contact the local Carrier repre-
sentative for details.
6. Use the following formula to calculate Input Watts:
Input Watts = Bhp x (746/motor eff.)
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
6,500 799 2.58 833 2.79 872 3.05 914 3.36 958 3.71
7,000 856 3.19 887 3.41 921 3.67 958 3.98 999 4.33
7,500 913 3.89 941 4.12 972 4.39 1006 4.69 1042 5.04
8,000 971 4.69 996 4.93 1024 5.20 1055 5.51 1088 5.86
8,500 1029 5.60 1052 5.85 1078 6.12 1106 6.44 1136 6.78
9,000 1087 6.62 1108 6.87 1132 7.16 1158 7.47 1185 7.82
9,500 1145 7.75 1165 8.02 1187 8.31 1211 8.63 1236 8.99
10,000 1203 9.01 1222 9.29 1243 9.59 1265 9.92 1288 10.28
10,500 1261 10.40 1279 10.69 1299 11.00 1319 11.34 1341 11.70
11,000 1320 11.93 1337 12.23 1355 12.55 1374 12.89 1394 13.26
11,500 1378 13.61 — — — — — — — —
12,000 — — — — — — — — — —
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 1005 4.12 1052 4.57 1100 5.06 1148 5.60 1195 6.17
7,000 1041 4.72 1084 5.16 1128 5.64 1172 6.17 1217 6.74
7,500 1080 5.43 1119 5.86 1160 6.33 1201 6.84 1242 7.40
8,000 1122 6.24 1158 6.66 1195 7.13 1233 7.63 1272 8.17
8,500 1167 7.16 1200 7.58 1234 8.04 1269 8.53 1304 9.06
9,000 1214 8.21 1244 8.62 1275 9.07 1308 9.56 1340 10.08
9,500 1262 9.37 1290 9.78 1319 10.23 1349 10.71 1379 11.23
10,000 1312 10.66 1338 11.08 1365 11.52 1392 12.00 — —
10,500 1363 12.09 1387 12.51 — — — — — —
11,000 — — — — — — — — — —
11,500 — — — — — — — — — —
12,000 — — — — — — — — — —
12,500 — — — — — — — — — —
Bhp — Brake Horsepower Input to Fan
H
H H
H H
H
H
H
H
H
E
E E
F
F
F
F
F
F
G G
G G
G
G
G
G
G