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

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

UNIT 48AJ,AK,AW,AY				050								051												060
NOMINAL CAPACITY (tons)				50								50												60
BASE UNIT													See Operating Weights Table
OPERATING WEIGHT (lb)
COMPRESSOR			2…SM125/1…SM125,																				1..SM160,1..SM175/
Quantity ... Type (Ckt 1/Ckt 2)											2…SM125/2…SM125
						1…SM175																	1..SM160,1..SM175
Number of Refrigerant Circuits
				2								2												2
Oil (oz) (Ckt 1, Ckt 2)						Precharged								Precharged									Precharged
REFRIGERANT TYPE															R-22
Operating Charge (lb-oz)
Circuit 1				64-4								98-0												81-0
Circuit 2				58-8								98-0												81-0
CONDENSER COIL*						Internally Enhanced, 3/8″ Copper Tubes, Aluminum Lanced, Aluminum Pre-Coated, or Copper Plate Fins
Quantity				2								2												2
Rows ... Fins/in.				4 ... 15										4…15										4…15
Total Face Area (sq ft)				66.7								100												100
CONDENSER FAN														Propeller Type
Nominal Cfm				25,600								38,400										38,400
Quantity... Diameter (in.)				4 ... 30								6...30										6 ... 30
Motor Hp				1								1												1
EVAPORATOR COIL									Internally Enhanced Copper Tubes, Aluminum Plate Fins with Intertwined Circuits
Tube Size (in.)				1/2								1/2												1/2
Rows ... Fins/in.				6 ... 16								4...17										4 ... 17
Total Face Area (sq ft)				31.3								48.1												48.1
EVAPORATOR FAN														Centrifugal Type
Quantity ... Size (in.)					2 ... 20 X 15									3...20 X 15									3 ... 20 X 15
Type Drive						Belt								Belt										Belt
Nominal Cfm				20,000								20,000										24,000
Motor Hp			20			25		30		20	25			30			40		40		25		30			40	40
																	(High Eff.)		(Prem. Eff.)							(High Eff.)	(Prem. Eff.)
Motor Frame Size
			256T			284T		286T		256T	284T			286T			324T		324T		284T		286T			324T	324T
Motor Bearing Type						Ball								Ball											Ball
Maximum Allowable Rpm				1300								1200												1200
Motor Pulley Pitch Diameter (in.)			5.7			6.2		6.7		5.9	5.3			5.9			6.5		9.5		5.3		5.9			6.5	9.5
Nominal Motor Shaft Diameter (in.)			15/8			17/8		17/8		15/8	17/8			17/8			21/8		21/8		17/8		17/8			21/8	21/8
Fan Pulley Pitch Diameter (in.)			9.5			9.5		9.5		11.1	9.1			9.5			9.5		13.7		9.1		9.5			9.5	13.7
Nominal Fan Shaft Diameter (in.)						115/16								115/16										1		15/16
Belt Quantity			2			2		2		2	3			3			3		2		3		3			3	2
Belt Type			5VX550			5VX570		5VX570		5VX560	5VX530			5VX550			5VX570		5VX650		5VX530		5VX550			5VX570	5VX650
Belt Length (in.)			55			57		57		56	53			55			57		65		53		55			57	65
Pulley Center Line Distance (in.)			15.0-17.9			14.6-17.6	14.6-17.6			15.0-17.9	15.2-17.5			14.7-17.2		14.2-17.0			14.2-17.0	15.2-17.5			14.7-17.2			14.2-17.0	14.2-17.0
Factory Speed Setting (rpm)			1061			1154		1249		930	1019			1086			1197		1214		1019		1086			1197	1214
FURNACE SECTION
Supply Line Pressure Range												5.0-in. wg min/13.5-in. wg max.
Rollout Switch Cutout
Temp (F)†				225								225												225
Burner Orifice Diameter (in ...drill size)
Natural Gas		Std		.120 ... 31								.120...31										.120 ... 31
Liquid Propane		Alt		.096 ... 41								.096...41										.096 ... 41
Thermostat Heat Anticipator Setting
Stage 1 (amps)				0.24								0.1												0.36
Stage 2 (amps)				0.13								0.1												0.13
Gas Input (Btuh) Stage 1			300,000/600,000									582,000/873,000										582,000/873,000
	(Low Heat/High Heat)
	Stage 2		400,000/800,000									776,000/1,164,000										776,000/1,164,000
	(Low Heat/High Heat)
Efficiency (Steady State) (%)				82								82												82
Temperature Rise Range				10-40/30-60								10-40/30-60										10-40/30-60
Manifold Pressure		(in. wg)
	Natural Gas	Std		3.5								3.3												3.3
	Liquid Propane	Alt		3.5								3.3												3.3
Gas Valve Quantity				2								3												3
HIGH-PRESSURE SWITCH (psig)
Cutout				426								426												426
Reset (Auto.)				320								320												320
MIXED-AIR FILTERS
Quantity ... Size (in.) Standard			10 ... 20 x 24 x 2									16...20 x 24 x 2											16 ... 20 x 24 x 2
		Pleated		5 ... 20 x 20 x 4										8...20 x 20 x 4									8 ... 20 x 20 x 4
				5 ... 20 x 24 x 4										8...20 x 24 x 4									8 ... 20 x 24 x 4
OUTDOOR-AIR FILTERS				8...16 x 25 x 2															12...16 x 25 x 2
Quantity...Size (in.)
				4...20 x 25 x 2															6...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														6...1
Fan, Diameter...Width (in.)						11 x 10													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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