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Table 33 — Motor Limitations
LEGEND
Bhp — Brake Horsepower
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 your fan motors up to the
horsepower ratings shown in the Motor Limitations table will not
result in nuisance tripping or premature motor failure. Unit war-
ranty will not be affected.
2. All motors comply with Energy Policy Act (EPACT) Standards
effective October 24, 1997.
Table 34 — Air Quality Limits
LEGEND 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 additionally limited to edb and ewb conditions.
STANDARD EFFICIENCY MOTORS
Nominal Bhp Maximum Bhp
Maximum Amps
Maximum
Watts
Maximum
Efficiency
230 v 460 v 575 v
5 5.9 14.6 7.9 6.0 5,030 87.5
7.5
8.7 22.0 — — 7,717 84.1
9.5 — 12.0 10.0 8,008 88.5
10
10.2 28.0 — — 8,502 89.5
11.8 — 14.6 12.0 9,836 89.5
15
15.3 43.8 — — 12,543 91.0
18.0 — 21.9 19.0 14,756 91.0
20
22.4 62.0 — — 18,363 91.0
23.4 — 28.7 23.0 19,183 91.0
25
28.9 72.0 — — 23,511 91.7
29.4 — 37.4 31.0 23,918 91.7
30
35.6 95.0 — — 28,742 92.4
34.7 — 48.0 47.0 28,015 92.4
40 42.0 110.0 55.0 48.8 33,690 93.0
HIGH EFFICIENCY MOTORS
Nominal Bhp Maximum Bhp
Maximum Amps
Maximum
Watts
Maximum
Efficiency
230 v 460 v
5 5.9 15.8 7.9 4,918 89.5
7.5
8.7 22.0 — 7,078 91.7
9.5 — 12.0 7,728 91.7
10
10.2 28.0 — 8,298 91.7
11.8 — 15.0 9,600 91.7
15
15.3 43.8 — 12,273 93.0
18.0 21.9 14,439 93.0
20
22.4 58.2 — 17,853 93.6
23.4 — 28.7 18,650 93.6
25
28.9 73.0 — 23,034 93.6
29.4 — 36.3 23,432 93.6
30
35.6 82.6 — 28,374 93.6
34.7 — 41.7 27,656 93.6
40 42.0 110.0 55.0 33,156 94.5
UNIT
48AJ,AK,AW,A
Y
UNIT
48EJ,EK,EW,EY
MINIMUM HEATING
AIRFLOW
(Low Heat)
MINIMUM HEATING
AIRFLOW
(High Heat)
MINIMUM COOLING
AIRFLOW (VAV)
AT FULL LOAD OPERATION
MINIMUM COOLING
AIRFLOW
(CV
MAXIMUM
AIRFLOW
020 024 5,900 6,100 4,000 6,000 10,000
025 028 5,900 6,100 5,000 7,500 12,500
027 030 5,900 6,100 5,400 8,100 13,500
030 034 5,900 6,100 6,000 9,000 15,000
035 038 7,600 10,100 7,000 10,500 17,500
040 044 7,600 10,100 8,000 12,000 20,000
— 048 7,600 10,100 9,000 13,500 22,500
050 — 7,600 10,100 10,000 15,000 22,500
— 054 11,000 14,700 10,000 15,000 25,000
— 058 11,000 14,700 11,000 16,500 27,000
060 064 11,000 14,700 12,000 18,000 27,000
— 068 11,000 14,700 13,000 19,500 27,000
CV — Constant Volume
edb — Entering Dry Bulb
ewb — Entering Wet Bulb
VAV — Variable Air Volume