Carrier 48AJ Operating And Service Manual page 26

Nominal
Bhp BkW
5 3.73
7.5 5.6
10 7.46
15 11.19
20 14.92
25 18.65
30 22.38
40 29.84
Nominal
Bhp BkW
5 3.73
7.5 5.6
10 7.46
15 11.19
20 14.92
25 18.65
30 22.38
40 29.84
LEGEND
Bhp — Brake Horsepower
BkW — Brake Kilowatts
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.
MINIMUM HEATING
UNIT
AIRFLOW CFM
48AJ,AK,AW,AY
020
025
027
030
035,036
040,041
050
051,060
LEGEND
CV — Constant Volume
VAV — Variable Air Volume
UNIT
50AJ,AW020
50AK,AY020
50AJ,AW025
50AK,AY025
50AJ,AW027
50AK,AY027
50AJ,AW030
50AK,AY030
50AJ,AW035,036
50AK,AY035,036
50AJ,AW040,041
50AK,AY040,041
50AJ,AW050
50AK,AY050
50AJ,AW051,060
50AK,AY051,060
*Operation at these levels may be limited by entering evaporator air wet bulb temperatures.
Table 39 — Motor Limitations
HIGH-EFFICIENCY MOTORS
Maximum
Bhp BkW
5.9 4.40
8.7 6.49
9.5 7.09
10.2 7.61
11.8 8.80
15.3 11.41
18.0 13.43
22.4 16.71
23.4 17.46
28.9 21.56
29.4 21.93
35.6 26.56
34.7 25.89
42.0 31.33
PREMIUM-EFFICIENCY MOTORS
Maximum
Bhp BkW
5.9
8.7
9.5
10.2
11.8
15.3 11.41
18.0 13.43
22.4 16.71
23.4 17.46
28.9 21.56
29.4 21.93
35.6 26.56
34.7 25.89
42.0 31.33
Table 40A — Air Quantity Limits (48AJ,AK,AW,AY)
MINIMUM HEATING
AIRFLOW CFM
(Low Heat) (High Heat)
5,900 6,100
5,900 6,100
5,900 6,100
5,900 6,100
5,900 6,100
7,600 10,100
7,600 10,100
11,000 10,100
Table 40B — Air Quantity Limits (50AJ,AK,AW,AY)
COOLING
Min CFM
6,000
4,000
7,500
5,000
8,100
5,400
9,000
6,000
10,500
7,000
12,000
8,000
13,500
10,000
18,000
12,000
Maximum Amps
230 v 460 v
14.6 7.9
22 —
— 12.0
28 —
— 14.6
43.8 —
— 21.9
62 —
— 28.7
72 —
— 37.4
95 —
— 48.0
110 55.0
Maximum Amps
230 v
4.40 15.8
6.49 22
7.09 —
7.61 28
8.80 —
43.8
—
58.2
—
73
—
82.6
—
110.0
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.
MINIMUM COOLING
AIRFLOW (VAV) CFM
AT FULL LOAD
4,000
5,000
5,400
6,000
7,000
8,000
10,000
12,000
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.
Max CFM*
10,000
10,000
12,500
12,500
13,500
13,500
15,000
15,000
17,500
17,500
20,000
20,000
20,000
20,000
27,000
27,000
26
Maximum
Watts
575 v
6.0 5,030
— 7,717
10.0 8,008
— 9,502
12.0 9,836
— 12,543
19.0 14,756
— 18,363
23.0 19,183
— 23,511
31.0 23,918
— 28,742
47.0 28,015
48.8 33,690
Maximum
Watts
460 v
7.9 4,918
— 7,078
12.0 7,728
— 8,298
15.0 9,600
— 12,273
21.9 14,439
— 17,853
28.7 18,650
— 23,034
36.3 23,432
— 28,374
41.7 27,656
55.0 33,156
MINIMUM COOLING
MAXIMUM AIRFLOW
AIRFLOW CFM
(CV)
6,000
7,500
8,100
9,000
10,500
12,000
15,000
18,000
ELECTRIC HEAT
Min CFM Max CFM
6,000
10,500
15,000
Maximum
Efficiency
87.5
84.1
88.5
89.5
89.5
91.0
91.0
91.0
91.0
91.7
91.7
92.4
92.4
93.0
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
CFM
10,000
12,500
13,500
15,000
17,500
20,000
22,500
27,000
15,000
20,000
27,000