Manuals / Carrier / Household Appliance / Air Conditioner

Carrier 48EJ, 48EW, 48EY024-068, 48AW, 48AY020-060, 48EK, 48AK Base Unit Dimensions - 48AJ,AK020-030

Models: 48EJ 48AJ 48AK 48EK 48AY020-060 48AW 48EY024-068 48EW

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Fig. 5 — Base Unit Dimensions — 48AJ,AK020-030

	NOTES:			OPERATING			CORNER WEIGHT (lbs)
	1.	Weights include economizer (standard).			A	B
			UNIT SIZE	WEIGHT*	(ft-in.)	(ft-in.)
	2.	Center of Gravity.		(lbs)			1	2	3	4

	3.	Do not locate adjacent units with flue discharge facing economizer	48AJ/AK (Low Heat) 020	5142	6- 03/8	3-63/16	1082	1174	1502	1384
			48AJ (High Heat) 020	5222	6- 15/16	3-611/16	1126	1194	1494	1408
		inlet.
		Min Clearances to be:	48AJ/AK (Low Heat) 025	5228	5- 95/8	3-8	1103	1103	1511	1511
		Adjacent Units: 15′-0″[4572].
			48AJ (High Heat) 025	5308	5-103/32	3-85/16	1135	1120	1516	1537
		Top of Units: No Overhang.
		Condenser Coil: 4′-0″[1219].	48AJ/AK (Low Heat) 027	5325	5- 95/8	3-8	1123	1123	1539	1539
		Economizer Side: 6′-0″[1829].
			48AJ (High Heat) 027	5405	5-103/32	3-85/16	1156	1140	1544	1565
		Heat Side: 4′-0″[1219].
		Filter Access Side: 10′-0″[3048]. (For removal of evaporator coil.)	48AJ/AK (Low Heat) 030	5325	5- 95/8	3-8	1123	1123	1539	1539
	4.	For smaller service and operational clearances contact Carrier Appli-
			48AJ (High Heat) 030	5405	5-103/32	3-85/16	1156	1140	1544	1565
		cation Engineering Department.

5.Bottom ducts designed to be attached to accessory roof curb. If unit is mounted on dunnage, it is recommended the ducts must be sup-

ported by cross braces as done on accessory roof curb.	UNIT SIZE	OPERATING	A (mm)	B (mm)	CORNER WEIGHT (kg)
6. Dimensions are in inches [mm].	UNIT SIZE	WEIGHT*	A (mm)	B (mm)	1	2	3	4
		(kg)			1	2	3	4
	48AJ/AK (Low Heat) 020	2332	1839	1072	491	533	681	628
	48AJ (High Heat) 020	2369	1862	1085	511	542	678	639
	48AJ/AK (Low Heat) 025	2371	1768	1118	500	500	686	686
	48AJ (High Heat) 025	2408	1781	1125	515	508	688	697
	48AJ/AK (Low Heat) 027	2415	1768	1118	509	509	698	698
	48AJ (High Heat) 027	2452	1781	1125	524	517	700	710
	48AJ/AK (Low Heat) 030	2415	1768	1118	509	509	698	698
	48AJ (High Heat) 030	2452	1781	1125	524	517	700	710

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Fig. 5 — Base Unit Dimensions — 48AJ,AK020-030

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Carrier 48EJ, 48EW, 48EY024-068, 48AW, 48AY020-060, 48EK, 48AK specifications Base Unit Dimensions - 48AJ,AK020-030

Contents

Step 11 — Position Power Exhaust/Barometric CONTENTSSAFETY CONSIDERATIONS INSTALLATION Step 1 — Provide Unit SupportStep 4 — Make Unit Duct Connections Page Page Page NOTES Fig. 5 - Base Unit Dimensions - 48AJ,AK020-030 Fig. 6 — Base Unit Dimensions — 48AJ,AK035-050 Fig. 7 — Base Unit Dimensions — 48AJ,AK060 Fig. 8 — Base Unit Dimensions — 48AW,AY020-030 Fig. 9 — Base Unit Dimensions — 48AW,AY035-050 Fig. 10 — Base Unit Dimensions — 48W,AY060 Fig. 11 — Base Unit Dimensions — 48EJ,EK024-034 Fig. 12 — Base Unit Dimensions — 48EJ,EK038-048 Fig. 13 — Base Unit Dimensions — 48EJ,EK054-068 Fig. 14 — Base Unit Dimensions — 48EW,EY024-034 Fig. 15 — Base Unit Dimensions — 48EW,EY038-048 Fig. 16 — Base Unit Dimensions — 48EW,EY054-068 Fig. 17 — Rigging Information Fig. 17 — Rigging Information cont Table 1A — Physical Data — 48AJ,AK,AW,AY Units UNIT 48AJ,AK,AW,AY Table 1B — Physical Data — 48EJ,EK,EW,EY Units UNIT 48EJ,EK,EW,EY UNIT 48EJ,EK,EW,EY 48AJ,AK,AW,AY Units Table 2 — Operating Weights48EJ,EK,EW,EY Units Fig. 18 — Air Distribution — Thru-the-Bottom Table 3 — Evaporator Fan Motor DataFig. 19 — Air Distribution — Thru-the-Side Step 5 — Install Flue Hood Table 4 — 48A,E Series Staged Gas Implementation Fig. 23 — Field Gas PipingTable 6 - Thermistor Designations Fig. 24 — Supply-AirThermistor Connections Fig. 26 — Field Control Remote Start/Stop Fig. 25 — Indoor Air Quality Sensor ConfigurationStep 9 - Make Electrical Connections Fig. 27 — Control Board Diagram Table 7 — Electrical Data — 48AJ,AK,AW,AY Units UNIT SIZE 30.8/28.0 236.3/230.9 Table 8 — Electrical Data — 48EJ,EK,EW,EY Units 30.8 0.96 UNIT Fig. 28 - Field Power Wiring Connections LEGEND Thermostat Wiring CV Only- Install a Carrier-approvedaccessory thermostat assembly per current price pages according to the installation instructions included with the ac- cessory or these instructions. Locate the thermostat on a solid interior wall in the conditioned space to sense the average temperature LEGEND Table 9 — CCN Connection Approved Shielded Cables Fig. 32 — Field Control Thermostat WiringFig. 33 — Field Control Temperature Sensor Wiring CV or VAV UnitsFig. 34 - Space Temperature Averaging Wiring Step 10 — Make Outdoor-AirInlet AdjustmentsFig. 35 — Field HIR Heat Interlock Relay Wiring Fig. 36 — Adding Seal Strip to Top of Hood Sides Fig. 37 - Economizer Hood AssemblyRight Side/Center Economizer Hood Shown Fig. 40 — Adding Foam Strip to Cross Member Fig. 38 — Adding Seal Strip to Sides of Hood TopMounting Flange Fig. 39 — Adding Seal Strip to Back of Hood TopFig. 44 — Mounting Angle With Tabs Attached to Attached to Filter Track AssemblyFilter Track Assembly Fig. 43 - Mounting Angle Without TabsEnthalpy Control HH57AC077 Fig. 47 - Wiring Connections for Solid-StateSave screws CURVE Fig. 49 - Economizer DetailsCONTROL CONTROL POINT48AJ,AK,AW,AY060 and 48EJ,EK,EW,EY054-068 Fig. 51 - Pressure Transducer LocationsFig. 53A — Motormaster III Sensor Location Fig. 52 - Motormaster III Control Baffle Details48AJ,AK,AW,AY020-030and 48EJ,EK,EW,EY024-034 48AJ,AK,AW,AY040, 050 and 48EJ,EK,EW,EY048 Fig. 53B — Motormaster III Sensor Location48AJ,AK,AW,AY035 and 48EJ,EK,EW,EY038 Fig. 53C — Motormaster III Sensor LocationFig. 54 — Side Return Air Conversion Step 13 — Field ModificationsConstant Volume Units Fig. 56 — Wiring Field-SuppliedUnloaders forSTART-UP Fig. 57 — Toshiba TOSVERT130-E3VFD Factory-InstalledJumpers13.Replace jumper across terminals ST and CC 13.Replace jumper across terminals R and CC Optional Field Wiring LEGEND Typical Factory WiringSee below for building pressure to signal level Table 17 — DIP Switch Configuration Table 18 — DIP Switch Factory Settings AIRFLOW AIRFLOW AIRFLOW 1.06 2.15 3.18 4.81 AIRFLOW AIRFLOW AIRFLOW AIRFLOW AIRFLOW AIRFLOW Table 34 — Air Quality Limits Table 33 — Motor LimitationsSequence of Operation Table 36 - Software Control Link Points Table 35 — User Defined Set PointsThe Time Guard function maintains a minimum off time of 5 minutes, a minimum ON time of 10 seconds, and a minimum delay before starting the second compressor of 10 seconds Fig. 59 — Heat Interlock Relay Wiring Table 38 — Stage Gas System Inputs/Outputs Table 37 — Staged Gas System ComponentsTable 39 — Navigator Display Menu Structure Fig. 60 — Navigator DisplayTable 40 — Occupied Heat and Morning Warm-Up Fig. 61 — Space Temperature Reset WiringOperation and Controlling Factors Fig. 62 - Field-SuppliedSmoke Detector Wiring Table 42 — Cooling Capacity Staging Table, CV Table 41 — Smoke Control ModesUnits with 2 Compressors Fig. 64 — Spark Gap Adjustment SERVICEFig. 63 — Door Latch Fig. 66 — Gas Heat Section Details Fig. 65 — Typical Gas Heating SectionLubrication Fig. 67 — Evaporator-FanAlignment and AdjustmentFig. 68 — Evaporator Fan Coupling Condenser-FanAdjustment Evaporator Fan Service and ReplacementBelt Tension Adjustment — To adjust belt tension Evaporator-FanMotor Replacement48EJ,EK,EW,EY024-034 Gas Valve AdjustmentFig. 71 — Cooling Charging Chart Fig. 72 — Cooling Charging Chart48AJ,AK,AW,AY020-060 Fig. 73 — Cooling Charging ChartFig. 74 — Cooling Charging Chart 48EJ,EK,EW,EY054-068Protective Devices LEGEND for Fig. 77-83— Typical Wiring SchematicsTABLE 1A Fig. 78 — Typical 48EK VAV 24-VControl Circuit Fig. 79 — Typical CV 24-VControl Circuit Fig. 80 — Typical 48EK VAV 115-VControl Circuit Fig. 81 — Typical 48EJ CV 115-VControl Circuit Page Page TROUBLESHOOTING LEGEND FPS — Freeze Protection SwitchHPS - High-PressureSwitch LPS - Low-PressureSwitchcompressor HPS — High-PressureSwitch LEGEND FPS — Freeze Protection SwitchLPS — Low-PressureSwitch 8-Pass HPS — High-PressureSwitch LEGEND FPS — Freeze Protection SwitchLPS — Low-PressureSwitch LPS — Low-PressureSwitch LEGEND HPS — High-PressureSwitchTXV — Thermostatic Expansion Valve TXV — Thermostatic Expansion Valve HPS - High-PressureSwitchLPS — Low-PressureSwitch LEGENDLPS — Low-PressureSwitch LEGEND HPS — High-PressureSwitchTXV — Thermostatic Expansion Valve LPS — Low-PressureSwitch LEGEND HPS — High-PressureSwitchTXV — Thermostatic Expansion Valve LEGEND IDM — Induced-DraftMotor Fig. 94 — IGC Control Heating and CoolingIGC — Integrated Gas Unit Controller Table 45 — Control Board LED Alarms Table 44 - IGC Control Board LED AlarmsPage CALL FOR FREE CATALOG SERVICE TRAININGELECTRICAL START-UPCHECKLISTTEMPERATURES PRE-START-UPGENERAL