Carrier 48/50AJ specifications Motor Limitations, Air Quantity Limits 48AJ,AK,AW,AY,A2,A3,A4,A5

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
7.5		5.6	8.7		6.49	23.5	—	—	7,717	84.1
			9.5		7.09	—	12.0	10.0	8,008	88.5
10		7.46	10.2		7.61	31.0	—	—	9,502	89.5
			11.8		8.80	—	15.0	12.0	9,836	89.5
15		11.19	15.3		11.41	46.0	—	—	12,543	91.0
			18.0		13.43	—	22.0	19.0	14,756	91.0
20		14.92	22.4		16.71	60.0	—	—	18,363	91.0
			23.4		17.46	—	28.7	23.0	19,183	91.0
25		18.65	28.9		21.56	73.0	—	—	23,511	91.7
			29.4		21.93	—	37.4	28.4	23,918	91.7
30		22.38	35.6		26.56	91.0	—	—	28,742	92.4
			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			Maximum		Maximum Amps		Maximum	Maximum
Bhp		BkW	Bhp		BkW	230 v	460 v	Watts	Efficiency
5		3.73	5.9		4.40	15.8	7.9	4,918	89.5
7.5		5.6	8.7		6.49	23.5	—	7,078	91.7
			9.5		7.09	—	12.0	7,728	91.7
10		7.46	10.2		7.61	30.0	—	8,298	91.0
			11.8		8.80	—	15.0	9,600	91.7
15		11.19	15.3		11.41	46.0	—	12,273	91.7
			18.0		13.43	—	22.0	14,439	93.0
20		14.92	22.4		16.71	59.0	—	17,853	93.0
			23.4		17.46	—	28.7	18,650	93.6
25		18.65	28.9		21.56	73.0	—	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

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.

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)

	MINIMUM HEATING	MINIMUM HEATING	MINIMUM COOLING	MINIMUM COOLING	MAXIMUM AIRFLOW
UNIT SIZE*	AIRFLOW CFM	AIRFLOW CFM	AIRFLOW (VAV) CFM	AIRFLOW CFM
					CFM
	(Low Heat)	(High Heat)	AT FULL LOAD	(CV)
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 (AJ,AK,AW,AY)	5,900	6,100	7,000	10,500	17,500
035 (A2,A3,A4,A5)	5,900	10,100	7,000	10,500	17,500
036,040,041	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

	LEGEND
CV	— Constant Volume
VAV	— Variable Air Volume

* Sizes 036,041, and 051 are 48AJ,AK,AW,AY only.

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.

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