Carrier 48AJ - Page 26

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Table 39 — Motor Limitations
LEGEND
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)
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
also limited by edb (entering dry bulb) and ewb (entering wet bulb) conditions.
Table 40B — Air Quantity Limits (50AJ,AK,AW,AY)
*Operation at these levels may be limited by entering evaporator air wet bulb temperatures.
HIGH-EFFICIENCY MOTORS
Nominal Maximum Maximum Amps
Maximum
Watts
Maximum
Efficiency
Bhp BkW Bhp BkW 230 v 460 v 575 v
53.735.9 4.40 14.6 7.9 6.0 5,030 87.5
7.5 5.6
8.7 6.49 22 — — 7,717 84.1
9.5 7.09 — 12.0 10.0 8,008 88.5
10 7.46
10.2 7.61 28 — — 9,502 89.5
11.8 8.80 — 14.6 12.0 9,836 89.5
15 11.19
15.3 11.41 43.8 — — 12,543 91.0
18.0 13.43 — 21.9 19.0 14,756 91.0
20 14.92
22.4 16.71 62 — — 18,363 91.0
23.4 17.46 — 28.7 23.0 19,183 91.0
25 18.65
28.9 21.56 72 — — 23,511 91.7
29.4 21.93 — 37.4 31.0 23,918 91.7
30 22.38
35.6 26.56 95 — — 28,742 92.4
34.7 25.89 — 48.0 47.0 28,015 92.4
40 29.84 42.0 31.33 110 55.0 48.8 33,690 93.0
PREMIUM-EFFICIENCY MOTORS
Nominal Maximum Maximum Amps
Maximum
Watts
Maximum
Efficiency
Bhp BkW Bhp BkW 230 v 460 v
53.735.9 4.40 15.8 7.9 4,918 89.5
7.5 5.6
8.7 6.49 22 — 7,078 91.7
9.5 7.09 — 12.0 7,728 91.7
10 7.46
10.2 7.61 28 — 8,298 91.0
11.8 8.80 — 15.0 9,600 91.7
15 11.19
15.3 11.41 43.8 — 12,273 91.7
18.0 13.43 — 21.9 14,439 93.0
20 14.92
22.4 16.71 58.2 — 17,853 93.0
23.4 17.46 — 28.7 18,650 93.6
25 18.65
28.9 21.56 73 — 23,034 93.6
29.4 21.93 — 36.3 23,432 93.6
30 22.38
35.6 26.56 82.6 — 28,374 93.6
34.7 25.89 — 41.7 27,656 93.6
40 29.84 42.0 31.33 110.0 55.0 33,156 94.5
Bhp — Brake Horsepower
BkW — Brake Kilowatts
UNIT
48AJ,AK,AW,AY
MINIMUM HEATING
AIRFLOW CFM
(Low Heat)
MINIMUM HEATING
AIRFLOW CFM
(High Heat)
MINIMUM COOLING
AIRFLOW (VAV) CFM
AT FULL LOAD
MINIMUM COOLING
AIRFLOW CFM
(CV)
MAXIMUM AIRFLOW
CFM
020 5,900 6,100 4,000 6,000 10,000
025 5,900 6,100 5,000 7,500 12,500
027 5,900 6,100 5,400 8,100 13,500
030 5,900 6,100 6,000 9,000 15,000
035,036 5,900 6,100 7,000 10,500 17,500
040,041 7,600 10,100 8,000 12,000 20,000
050 7,600 10,100 10,000 15,000 22,500
051,060 11,000 10,100 12,000 18,000 27,000
CV — Constant Volume
VAV — Variable Air Volume
UNIT
COOLING ELECTRIC HEAT
Min CFM Max CFM* Min CFM Max CFM
50AJ,AW020 6,000 10,000
6,000 15,000
50AK,AY020 4,000 10,000
50AJ,AW025 7,500 12,500
50AK,AY025 5,000 12,500
50AJ,AW027 8,100 13,500
50AK,AY027 5,400 13,500
50AJ,AW030 9,000 15,000
50AK,AY030 6,000 15,000
50AJ,AW035,036 10,500 17,500
50AK,AY035,036 7,000 17,500
50AJ,AW040,041 12,000 20,000
10,500 20,000
50AK,AY040,041 8,000 20,000
50AJ,AW050 13,500 20,000
50AK,AY050 10,000 20,000
50AJ,AW051,060 18,000 27,000
15,000 27,000
50AK,AY051,060 12,000 27,000