Manuals / Carrier / Household Appliance / Air Conditioner

Carrier 48AK, 48EW, 48EY024-068, 48AW, 48AY020-060, 48EK, 48AJ Base Unit Dimensions — 48EJ,EK024-034

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

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Fig. 11 — Base Unit Dimensions — 48EJ,EK024-034

NOTES:

1.Weights include economizer (standard).

2. Center of Gravity.

3.Do not locate adjacent units with flue discharge facing economizer inlet.

Min Clearances to be:

Adjacent Units: 15′-0″[4572].

Top of Units: No Overhang.

Condenser Coil: 4′-0″[1219].

Economizer Side: 6′-0″[1829].

Heat Side: 4′-0″[1219].

Filter Access Side: 10′-0″[3048]. (For removal of evaporator coil.)

4.For smaller service and operational clearances contact Carrier Appli- 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 supported by cross braces as done on accessory roof curb.

6.Dimensions are in inches [mm].

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Fig. 11 — Base Unit Dimensions — 48EJ,EK024-034

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Carrier 48AK, 48EW, 48EY024-068, 48AW, 48AY020-060, 48EK, 48AJ specifications Base Unit Dimensions — 48EJ,EK024-034

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 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 Fig. 33 — Field Control Temperature Sensor Fig. 32 — Field Control Thermostat WiringWiring CV or VAV Units Table 9 — CCN Connection Approved Shielded CablesFig. 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 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 toEnthalpy Control HH57AC077 Fig. 47 - Wiring Connections for Solid-StateSave screws CONTROL Fig. 49 - Economizer DetailsCONTROL POINT CURVE48AJ,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,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 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 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 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 LPS — Low-PressureSwitch HPS - High-PressureSwitchLEGEND TXV — Thermostatic Expansion ValveLPS — 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 TRAININGTEMPERATURES START-UPCHECKLISTPRE-START-UP ELECTRICALGENERAL