Bryant 581A Installation And Service Instructions Manual page 23

Table 11 — Air Quantity Limits
UNIT MINIMUM
581A CFM
155 3600
4500
180
240 6000
UNIT NOMINAL
581A
155
(Standard
Motor)
155
(Optional
Motor)
180
240
BHP — Brake Horsepower
UNIT
581A
155, 180
240
LEGEND
bhp — Brake Horsepower
FIOP — Factory-Installed Option
1
581A 0 /
2
155† †† ††
155** †† ††
†† ††
180†
180** †† ††
240† †† ††
240** †† ††
*Approximate fan rpm shown.
†Indicates standard drive package.
**Indicates alternate drive package.
††Due to belt and pulley style, pulley cannot be set to this number of turns open.
MAXIMUM
CFM
6,000
7,500
10,000
Table 12 — Evaporator Fan Motor Specifications
VOLTAGE
Hp
2.9 208
2.9 230
2.9 460
3.7 208
3.7 230
3.7 460
5 208
5 230
5 460
7.5 208
7.5 230
7.5 460
Table 13 — Accessory/FIOP Economizer Static Pressure (in. wg)
UNIT
VOLTAGE
All
All
Table 14 — Fan RPM at Motor Pulley Setting*
1
1 1 / 2
2
†† †† 1064
†† †† 1426
†† †† 1021
†† †† 1200
†† †† 1151
†† †† 1369
MAX
EFF.
WATTS
2700 85.8%
2700 85.8%
2700 85.8%
3775 85.8%
3775 85.8%
3775 85.8%
5180 87.5%
5180 87.5%
5180 87.5%
7915 88.5%
8640 88.5%
8640 88.5%
CFM
3,750
4,000
5,000
6,000
7,500
6,000
7,200
9,000
10,000
NOTES:
1. The factory-assembled horizontal adapter substantially improves fan
performance. See Fig. 27.
2. The static pressure must be added to external static pressure. The
sum and the evaporator entering-air cfm should then be used in con-
junction with the Fan Performance table to determine blower rpm,
bhp, and watts.
1 1
2 / 3 3 /
2 2
1035 1006 978
1393 1360 1327
1002 984 965
1178 1156 1134
1132 1114 1095
1347 1325 1303
—23—
MAX MAX
BHP BkW
3.13 2.34
3.13 2.34
3.13 2.34
4.38 3.27
4.38 3.27
4.38 3.27
6.13 4.57
6.13 4.57
6.13 4.57
9.47 7.06
10.33 7.71
10.33 7.71
ECONOMIZER
PRESSURE DROP
.03
.03
.05
.07
.10
.07
.09
.11
.12
1
4 4 / 5
2
949 920 891
1294 1261 1227
947 928 910
1112 1091 1069
1077 1058 1040
1281 1259 1237
MAX
AMPS
9.46
8.6
4.3
10.5
10.5
4.8
15.8
15.8
7.9
22
22
13
1
5 / 6
2
863 834
1194 1161
891 873
1047 1025
1021 1002
1215 1193