Carrier installation instructions UNIT 48AJ,AK,AW,AY

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

UNIT 48AJ,AK,AW,AY				035					036						040				041
NOMINAL CAPACITY (tons)				35					35						40				40
BASE UNIT											See Operating Weights Table
OPERATING WEIGHT (lb)
COMPRESSOR				1…SR*812AT,					1…SR*812AT,
Quantity ... Type (Ckt 1/Ckt 2)														2…SR*942AT/2…SM125				2…SR*942AT/2…SM125
			1…SR*942AT/2…SR*942AT					1…SR*942AT/2…SR*942AT
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			33-0					36-0						36-0				47-0
	Circuit 2			38-0					58-0						47-0				47-0
CONDENSER COIL*					Internally Enhanced, 3/8″ Copper Tubes, Aluminum Lanced, Aluminum Pre-Coated, or Copper Plate Fins
Quantity				1					2						2				2
Rows ... Fins/in.				4 ... 15						2...15/4…15					2 ... 15 / 4 … 15					4...15/4…15
Total Face Area (sq ft)				33.3					66.7						66.7				66.7
CONDENSER FAN													Propeller Type
Nominal Cfm				14,500					30,000						30,000				30,000
Quantity... Diameter (in.)				2 ... 30					4...30						4 ... 30				4...30
Motor Hp				1					1						1				1
EVAPORATOR COIL							Internally Enhanced Copper Tubes, Aluminum Plate Fins with Intertwined Circuits
Tube Size (in.)				1/2					1/2						1/2				1/2
Rows ... Fins/in.				6 ... 16					4...17						4 ... 16				4...17
Total Face Area (sq ft)				31.3					31.3						31.3				31.3
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				14,000					14,000						16,000				16,000
Motor Hp			15		20		25	15			20		25	15		20	25	15			20	25
Motor Frame Size			254T		256T		284T	254T			256T		284T	254T		256T	284T	254T			256T	284T
Motor Bearing Type					Ball						Ball					Ball					Ball
Maximum Allowable Rpm				1300					1300						1300				1300
Motor Pulley Pitch Diameter (in.)			5.1		5.7		6.2	5.3			5.7		7.5	5.3		5.7	7.5	5.3			5.7	7.5
Nominal Motor Shaft Diameter (in.)			15/8		15/8		17/8	15/8			15/8		17/8	15/8		15/8	17/8	15/8			15/8	17/8
Fan Pulley Pitch Diameter (in.)			8.7		8.7		8.7	9.5			9.5		11.1	9.5		9.5	11.1	9.5			9.5	11.1
Nominal Fan Shaft Diameter (in.)					115/16						115/16					115/16					115/16
Belt Quantity			2		2		2	2			2		2	2		2	2	2			2	2
Belt Type			5VX500		5VX530		5VX550	5VX530			5VX550		5VX590	5VX530		5VX550	5VX590	5VX530			5VX550	5VX590
Belt Length (in.)			50		53		55	53			55		59	53		55	59	53			55	59
Pulley Center Line Distance (in.)			15.0-17.9		15.0-17.9	15.0-17.9		15.0-17.9			15.0-17.9	14.6-17.6		15.0-17.9		15.0-17.9	14.6-17.6	15.0-17.9			15.0-17.9	14.6-17.6
Factory Speed Setting (rpm)			1005		1147		1247	976			1050		1182	976		1050	1182	976			1050	1182
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					.120...31						.120 ... 31				.120...31
	Liquid Propane	Alt		.089 ... 43					.096...41						.096 ... 41				.096...41
Thermostat Heat Anticipator Setting
	Stage 1 (amps)			0.24					0.1						0.24				0.1
	Stage 2 (amps)			0.13					0.1						0.13				0.1
Gas Input (Btuh) Stage 1				262,500/394,000				300,000/600,000							300,000/600,000				300,000/600,000
	(Low Heat/High Heat)
	Stage 2			350,000/525,000				400,000/800,000							400,000/800,000				400,000/800,000
	(Low Heat/High Heat)
Efficiency (Steady State) (%)				82					82						82				82
Temperature Rise Range				15-45/35-65					10-40/30-60						10-40/3 -60				10-40/30-60
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 20 x 4						5 ... 20 x 24 x 4				5...20 x 20 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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