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Carrier 48EY024-068, 48EW, 48AW, 48AY020-060, 48EK, 48AK, 48AJ, 48EJ specifications compressor

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

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compressor

	12-Pass		4-Pass
	12-Pass		4-Pass
HPS & LPS mounted on	12-Pass		4-Pass
compressor	12-Pass		4-Pass
	12-Pass		4-Pass
	12-Pass	TXV #1	4-Pass
Muffler	12-Pass	TXV #1	4-Pass
Compressor #1	12-Pass		4-Pass
Compressor #1	12-Pass		4-Pass
	12-Pass		4-Pass
	12-Pass		4-Pass
	12-Pass		4-Pass
	12-Pass		4-Pass
	12-Pass		4-Pass
			4-Pass
	6-Pass		4-Pass
			4-Pass
	6-Pass		4-Pass
			4-Pass
	6-Pass		4-Pass
			4-Pass
	6-Pass		4-Pass
			4-Pass
		TXV #2	4-Pass
		TXV #2	4-Pass
			4-Pass
HPS- HK02ZA428			4-Pass
HPS- HK02ZA428			4-Pass
Cut-In - 320 PSI			4-Pass
Cut-In - 320 PSI			4-Pass
Cut-out - 420 PSI			4-Pass
Cut-out - 420 PSI			4-Pass
			4-Pass
LPS - HK02ZB027			4-Pass
Cut -In - 22 PSI			4-Pass
Cut-out - 7 PSI			4-Pass
Cut-out - 7 PSI			4-Pass
			4-Pass
			4-Pass
			4-Pass
			4-Pass
			4-Pass
			4-Pass
			4-Pass
			4-Pass
			4-Pass
	12-Pass		4-Pass
	12-Pass		4-Pass
HPS & LPS mounted on	12-Pass		4-Pass
compressor	12-Pass		4-Pass
	12-Pass		4-Pass
	12-Pass		4-Pass
Muffler	12-Pass		4-Pass
Compressor #1	12-Pass		4-Pass
Compressor #1	12-Pass		4-Pass
	12-Pass		4-Pass
	12-Pass
	12-Pass
	12-Pass
	12-Pass
	6-Pass
	6-Pass
	6-Pass
	6-Pass
LEGEND

FPS — Freeze Protection Switch

HPS — High-Pressure Switch

LPS — Low-Pressure Switch

TXV — Thermostatic Expansion Valve

Fig. 86 — Typical Refrigerant Circuiting (48AJ,AK,AW,AY035)

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Image 105

Carrier 48EY024-068, 48EW, 48AW, 48AY020-060, 48EK, 48AK, 48AJ, 48EJ specifications compressor

Contents

SAFETY CONSIDERATIONS CONTENTSINSTALLATION Step 1 — Provide Unit Support Step 11 — Position Power Exhaust/BarometricStep 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 Table 2 — Operating Weights 48AJ,AK,AW,AY Units48EJ,EK,EW,EY Units Table 3 — Evaporator Fan Motor Data Fig. 18 — Air Distribution — Thru-the-BottomFig. 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 Fig. 33 — Field Control Temperature Sensor Fig. 32 — Field Control Thermostat WiringWiring CV or VAV Units Table 9 — CCN Connection Approved Shielded CablesStep 10 — Make Outdoor-AirInlet Adjustments Fig. 34 - Space Temperature Averaging WiringFig. 35 — Field HIR Heat Interlock Relay Wiring Fig. 37 - Economizer Hood Assembly Fig. 36 — Adding Seal Strip to Top of Hood SidesRight Side/Center Economizer Hood Shown Mounting Flange Fig. 38 — Adding Seal Strip to Sides of Hood TopFig. 39 — Adding Seal Strip to Back of Hood Top Fig. 40 — Adding Foam Strip to Cross MemberFilter Track Assembly Attached to Filter Track AssemblyFig. 43 - Mounting Angle Without Tabs Fig. 44 — Mounting Angle With Tabs Attached toFig. 47 - Wiring Connections for Solid-State Enthalpy Control HH57AC077Save screws CONTROL Fig. 49 - Economizer DetailsCONTROL POINT CURVE48AJ,AK,AW,AY060 and 48EJ,EK,EW,EY054-068 Fig. 51 - Pressure Transducer LocationsFig. 52 - Motormaster III Control Baffle Details Fig. 53A — Motormaster III Sensor Location48AJ,AK,AW,AY020-030and 48EJ,EK,EW,EY024-034 48AJ,AK,AW,AY035 and 48EJ,EK,EW,EY038 Fig. 53B — Motormaster III Sensor LocationFig. 53C — Motormaster III Sensor Location 48AJ,AK,AW,AY040, 050 and 48EJ,EK,EW,EY048Fig. 54 — Side Return Air Conversion Step 13 — Field ModificationsFig. 56 — Wiring Field-SuppliedUnloaders for Constant Volume UnitsSTART-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 DisplayFig. 61 — Space Temperature Reset Wiring Table 40 — Occupied Heat and Morning Warm-UpOperation and Controlling Factors Fig. 62 - Field-SuppliedSmoke Detector Wiring Table 41 — Smoke Control Modes Table 42 — Cooling Capacity Staging Table, CVUnits with 2 Compressors SERVICE Fig. 64 — Spark Gap AdjustmentFig. 63 — Door Latch Fig. 66 — Gas Heat Section Details Fig. 65 — Typical Gas Heating SectionFig. 67 — Evaporator-FanAlignment and Adjustment LubricationFig. 68 — Evaporator Fan Coupling Belt Tension Adjustment — To adjust belt tension Evaporator Fan Service and ReplacementEvaporator-FanMotor Replacement Condenser-FanAdjustmentFig. 71 — Cooling Charging Chart Gas Valve AdjustmentFig. 72 — Cooling Charging Chart 48EJ,EK,EW,EY024-034Fig. 74 — Cooling Charging Chart Fig. 73 — Cooling Charging Chart48EJ,EK,EW,EY054-068 48AJ,AK,AW,AY020-060Protective 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 HPS - High-PressureSwitch FPS — Freeze Protection SwitchLPS - Low-PressureSwitch LEGENDcompressor LEGEND FPS — Freeze Protection Switch HPS — High-PressureSwitchLPS — Low-PressureSwitch 8-Pass LEGEND FPS — Freeze Protection Switch HPS — High-PressureSwitchLPS — Low-PressureSwitch LEGEND HPS — High-PressureSwitch LPS — Low-PressureSwitchTXV — Thermostatic Expansion Valve LPS — Low-PressureSwitch HPS - High-PressureSwitchLEGEND TXV — Thermostatic Expansion ValveLEGEND HPS — High-PressureSwitch LPS — Low-PressureSwitchTXV — Thermostatic Expansion Valve LEGEND HPS — High-PressureSwitch LPS — Low-PressureSwitchTXV — Thermostatic Expansion Valve Fig. 94 — IGC Control Heating and Cooling LEGEND IDM — Induced-DraftMotorIGC — Integrated Gas Unit Controller Table 45 — Control Board LED Alarms Table 44 - IGC Control Board LED AlarmsPage CALL FOR FREE CATALOG SERVICE TRAININGTEMPERATURES START-UPCHECKLISTPRE-START-UP ELECTRICALGENERAL