Carrier installation instructions Physical Data - 48AJ,AK,AW,AY Units

Table 1 — Physical Data — 48AJ,AK,AW,AY Units

UNIT 48AJ,AK,AW,AY				020							025				027				030
NOMINAL CAPACITY (tons)				20							25				27				30
BASE UNIT												See Operating Weights Table
OPERATING WEIGHT (lb)
COMPRESSOR										1…SR*812AT, 1…SR*942AT/
Quantity ... Type (Ckt 1/Ckt 2)			2…SR*782AT/1…SR*782AE											2 ... SR*942AT/1…SR*942AE				2…SR*782AT/2…SR*812AT
												1…SR*942AE
Number of Refrigerant Circuits
				2							2				2				2
Oil (oz) (Ckt 1, Ckt 2)					Precharged							Precharged			Precharged					Precharged
REFRIGERANT TYPE													R-22
Operating Charge (lb-oz)
Circuit 1				26-8							33-8				35-8				29-0
Circuit 2				14-0							17-8				20-0				30-8
CONDENSER COIL*						Internally Enhanced, 3/8″ Copper Tubes, Aluminum Lanced, Aluminum Pre-Coated, or Copper Plate Fins
Quantity				1							1				1				1
Rows ... Fins/in.				2 ... 15							3 ... 15				3 ... 15				4 ... 15
Total Face Area (sq ft)				33.3							33.3				33.3				33.3
CONDENSER FAN													Propeller Type
Nominal Cfm				17,200							15,850				15,850				14,500
Quantity... Diameter (in.)				2 ... 30							2 ... 30				2 ... 30				2 ... 30
Motor Hp				1							1				1				1
EVAPORATOR COIL									Internally Enhanced Copper Tubes, Aluminum Plate Fins with Intertwined Circuits
Tube Size (in.)				3/8							3/8				3/8				3/8
Rows ... Fins/in.				3 ... 15							3 ... 15				4 ... 15				4 ... 15
Total Face Area (sq ft)				31.7							31.7				31.7				31.7
EVAPORATOR FAN													Centrifugal Type
Quantity ... Size (in.)				2 ... 20 X 15								2 ... 20 X 15			2 ... 20 X 15				2 ... 20 X 15
Type Drive						Belt						Belt				Belt					Belt
Nominal Cfm				8,000							10,000				11,000				12,000
Motor Hp			5			10		15		5		10	15	10		15	20	10			15		20
Motor Frame Size			184T			215T		254T		184T		215T	254T	215T		254T	256T	215T			254T		256T
Motor Bearing Type						Ball						Ball				Ball					Ball
Maximum Allowable Rpm				1200							1200				1200				1200
Motor Pulley Pitch Diameter (in.)			4.8			4.4		5.7		4.8		6.1	5.5	4.4		4.9	5.9	4.4			5.7		5.9
Nominal Motor Shaft Diameter (in.)			11/8			13/8		15/8		11/8		13/8	15/8	13/8		15/8	15/8	13/8			15/8		15/8
Fan Pulley Pitch Diameter (in.)			12.4			8.6		9.1		12.4		11.1	8.7	9.4		8.1	8.7	9.5			9.1		8.7
Nominal Fan Shaft Diameter (in.)						115/16						115/16				115/16					115/16
Belt Quantity			1			1		2		1		1	2	2		2	2	2			2		2
Belt Type			BX56			BX50		5VX530		BX56		5VX570	5VX530	BX50		5VX530	5VX530	BX50			5VX530		5VX530
Belt Length (in.)			56			63		53		56		57	53	50		50	53	50			53		53
Pulley Center Line Distance (in.)			16.0-18.7			15.6-18.4	15.0-17.9			15.6-18.4		15.6-18.4	15.0-17.9	15.6-18.4		15.0-17.9	15.0-17.9	15.6-18.4			15.0-17.9	15.0-17.9
Factory Speed Setting (rpm)			677			895		1096		677		962	1106	819		1096	1187	884			1096		1187
FURNACE SECTION
Supply Line Pressure Range												5.0-in. wg min/13.5-in. wg max.
Rollout Switch Cutout
Temp (F)†				225							225				225				225
Burner Orifice Diameter (in. ...drill size)
Natural Gas		Std		.111 ... 34							.111 ... 34				.111 ... 34				.111 ... 34
Liquid Propane		Alt		.089 ... 43							.089 ... 43				.089 ... 43				.089 ... 43
Thermostat Heat Anticipator Setting
Stage 1 (amps)				0.24							0.24				0.24				0.24
Stage 2 (amps)				0.13							0.13				0.13				0.13
Gas Input (Btuh) Stage 1				262,500/394,000							262,500/394,000			262,500/394,000					262,500/394,000
	(Low Heat/High Heat)
	Stage 2			350,000/525,000							350,000/525,000			350,000/525,000					350,000/525,000
	(Low Heat/High Heat)
Efficiency (Steady State) (%)				82							82				82				82
Temperature Rise Range				15-45/35-65							15-45/35-65				15-45/35-65				15-45/35-65
Manifold Pressure		(in. wg)
	Natural Gas	Std		3.5							3.5				3.5				3.5
	Liquid Propane	Alt		3.5							3.5				3.5				3.5
Gas Valve Quantity				2							2				2				2
HIGH-PRESSURE SWITCH (psig)
Cutout				426							426				426				426
Reset (Auto.)				320							320				320				320
MIXED-AIR FILTERS
Quantity ... Size (in.) Standard				10 ... 20 x 24 x 2								10 ... 20 x 24 x 2		10 ... 20 x 24 x 2					10 ... 20 x 24 x 2
		Pleated		5 ... 20 x 20 x 4								5 ... 20 x 20 x 4		5 ... 20 x 20 x 4					5 ... 20 x 20 x 4
				5 ... 20 x 24 x 4								5 ... 20 x 24 x 4		5 ... 20 x 24 x 4					5 ... 20 x 24 x 4
OUTDOOR-AIR FILTERS													8...16 x 25 x 2
Quantity...Size (in.)
													4...20 x 25 x 2
POWER EXHAUST			Direct Drive, Single-Phase Motors (Factory-Wired for High Speed Operation), Forward-Curved Fan Wheels with Backdraft Dampers on Each Fan
													Housing
Motor, Quantity...Hp
													4...1
Fan, Diameter...Width (in.)													11 x 10
	LEGEND											*Sizes 020-040: Circuit 1 uses the lower portion of condenser coil, Circuit 2 uses the upper
Al	— Aluminum											portion.
												Sizes 041-060: Circuit 1 uses the left condenser coil, Circuit 2 the right. All units have
Cu	— Copper
												intertwined evaporator coils.

†Rollout switch is manual reset.

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