Table 39 -- Motor Limitations
HIGH-EFFICIENCY MOTORS
Nominal Maximum Maximum Amps Maximum Maximum
Bhp BkW Bhp BkW 230 v 460 v 575 v Watts Efficiency
5 3.73 5.9 4.40 15.0 7.9 6.0 5,030 87.5
8.7 6.49 23.5 -- -- 7,717 84.1
7.5 5.6
9.5 7.09 -- 12.0 10.0 8,008 88.5
10.2 7.61 31.0 -- -- 9,502 89.5
10 7.46
11.8 8.80 -- 15.0 12.0 9,836 89.5
15.3 11.41 46.0 -- -- 12,543 91.0
15 11.19
18.0 13.43 -- 22.0 19.0 14,756 91.0
22.4 16.71 60.0 -- -- 18,363 91.0
20 14.92
23.4 17.46 -- 28.7 23.0 19,183 91.0
28.9 21.56 73.0 -- -- 23,511 91.7
25 18.65
29.4 21.93 -- 37.4 28.4 23,918 91.7
35.6 26.56 91.0 -- -- 28,742 92.4
30 22.38
34.7 25.89 -- 43.8 36.3 28,015 92.4
40 29.84 42.0 31.33 110.0 55.0 43.8 33,690 93.0
PREMIUM-EFFICIENCY MOTORS
Nominal
Bhp
5
7.5
10
15
20
25
30
40
BkW
3.73
5.6
7.46
11.19
14.92
18.65
22.38
29.84
Bhp
5.9
8.7
9.5
10.2
11.8
15.3
18.0
22.4
23.4
28.9
29.4
35.6
34.7
42.0
Maximum
BkW
4.40
6.49
7.09
7.61
8.80
11.41
13.43
16.71
17.46
21.56
21.93
26.56
25.89
31.33
LEGEND
-- Brake Horsepower
-- Brake Kilowatts
Maximum Amps
230 v 460 v
15.8 7.9
23.5
-- 12.0
30.0
-- 15.0
46.0
-- 22.0
59.0
-- 28.7
73.0
-- 36.3
82.6
-- 41.7
110.0 55.0
Maximum
Watts
4,918
7,078
7,728
8,298
9,600
12,273
14,439
17,853
18,650
23,034
23,432
28,374
27,656
33,156
Maximum
Efficiency
89.5
91.7
91.7
91.0
91.7
91.7
93.0
93.0
93.6
93.6
93.6
93.6
93.6
94.5
Bhp
BkW
NOTES:
1. Extensive motor and electrical testing on the Carrier units has ensured that
the full horsepower range of the motor can be utilized with confidence.
Using the fan motors up to the horsepower ratings shown in the Motor Lim-
itations table will not result in nuisance tripping or premature motor fail-
ures. Unit warranty will not be affected.
2. All motors comply with Energy Policy Act (EPACT) Standards effective
October 24, 1997.
Table 40A -- Air Quantity Limits (48AJ,AK,AW,AY,A2,A3,A4,A5)
MAXIMUM AIRFLOW
UNIT SIZE* CFM
020
025
027
030
035 (AJ,AK,AW,AY)
035(A2,A3,A4,A5)
036,040,041
050
051,060
LEGEND
CV -- Constant Volume
VAV -- Variable Air Volume
MINIMUM HEATING
AIRFLOW CFM
(Low Heat)
5,900
5,900
5,900
5,900
5,900
5,900
7,600
7,600
11,000
MINIMUM HEATING
AIRFLOW CFM
(High Heat)
6,100
6,100
6,100
6,100
6,100
10,100
10,100
10,100
10,100
MINIMUM COOLING
AIRFLOW (VAV) CFM
AT FULL LOAD
4,000
5,000
5,400
6,000
7,000
7,000
8,000
10,000
12,000
MINIMUM COOLING
AIRFLOW CFM
(CV)
6,000
7,500
8,100
9,000
10,500
10,500
12,000
15,000
18,000
* Sizes 036,041, and 051 are 48AJ,AK,AW, AY only.
10,000
12,500
13,500
15,000
17,500
17,500
20,000
22,500
27,000
NOTE: Variable air volume units will operate down to 70 cfm/ton in Cooling
mode. Performance at 70 cfm/ton is limited to unloaded operation and may be
also limited by edb (entering dry bulb) and ewb (entering wet bulb) conditions.
26
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