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Carrier EW, EY024-048 installation instructions Ð Base Unit Dimensions, 48EJ,EK038-048

Models: EY024-048 EK 48EJ

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Fig. 4 Ð Base Unit Dimensions, 48EJ,EK038-048

VFD Ð Variable Frequency Drive

NOTES:

1.Weights include economizer (STD).

2. Center of gravity.

3.Do not locate adjacent units with ¯ue discharge facing econo- mizer inlet. Minimum clearances to be:

Adjacent Units: 15 -0

Top of Units: No overhang

Condenser Coil: 4 -0

Economizer Side: 6 -0

Gas Heat Side: 4 -0

Filter Access Side: 10 -0 (For Removal of Evaporator Coil)

4.For smaller service and operational clearances, contact Carrier Application Engineering department.

5.Bottom ducts designed to be attached to accessory roof curb. If unit is mounted on dunnage, it is recommended the ducts be supported by cross braces as done on accessory roof curb.

6.Dimensions are in inches.

	UNIT	OPERATING	A	B	CORNER WEIGHT (lb)
	UNIT	WEIGHT	A	B	CORNER WEIGHT (lb)
	SIZE	WEIGHT
	SIZE	lb	ft-in.	ft-in.	1	2	3	4
		lb	ft-in.	ft-in.	1	2	3	4
	48EJ,EKD038	4442	7- 811¤16	3-107¤8	1021	894	1180	1347
	48EJE038	4602	7-101¤8	3-113¤16	1080	934	1200	1388
	48EJ,EKD044	4668	7- 55¤16	3-107¤8	1033	906	1275	1455
	48EJE044	4828	7- 613¤16	3-113¤16	1094	945	1293	1496
	48EJ,EKD048	4955	7- 311¤16	3-101¤2	1068	953	1384	1550
	48EJE048	5115	7- 53¤16	3-1013¤16	1129	994	1401	1592

Fig. 4 Ð Base Unit Dimensions, 48EJ,EK038-048

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Carrier EW, EY024-048 installation instructions Ð Base Unit Dimensions, 48EJ,EK038-048

Contents

INSTALLATION Step 1 Ð Provide Unit Support CONTENTSSAFETY CONSIDERATIONS Step 10 Ð Position Power Exhaust/BarometricStep 3 Ð Field Fabricate Ductwork Instructions continued on pageFig. 1 Ð Roof Curb Sizes UNIT LEVELING TOLERANCES DIMENSIONSDegrees and Inches Fig. 2 Ð Roof Curb Sizes UNIT LEVELING TOLERANCES DIMENSIONSDegrees and Inches Fig. 3 Ð Base Unit Dimensions, 48EJ,EK024-034 Fig. 4 Ð Base Unit Dimensions, 48EJ,EK038-048 Fig. 5 Ð Base Unit Dimensions, 48EW,EY024-034 Fig. 6 Ð Base Unit Dimensions, 48EW,EY038-048 WHEN RIGGING NOTICE TO RIGGERS ALL PANELS MUST BE IN PLACEFig. 7 Ð Rigging Label Table 1 Ð Physical Data Table 1 Ð Physical Data cont Fig. 8 Ð Air Distribution Ð Thru-the-Bottom Fig. 9 Ð Air Distribution Ð Thru-the-SideFig. 10 Ð Flue Hood Location Typical Roof Curb or Slab Mount Shown Fig. 11 Ð Combustion Fan Housing LocationFig. 12 Ð Condensate Drain Trap Piping Details Fig. 13 Ð Field Gas Piping·support a eld test for eld checkout Fig. 14 Ð Field Control Remote Start/Stop Fig. 15 Ð Indoor Air Quality Sensor CongurationStep 8 Ð Make Electrical Connections Fig. 16 Ð Control Board Diagram Table 4 Ð Electrical Data Table 4 Ð Electrical Data cont Table 4 Ð Electrical Data cont UNITFig. 17 Ð Field Power Wiring Connections Fig. 18 Ð Control Box Diagram SizesFig. 21 Ð Field Control Temperature Sensor Wiring Fig. 19 Ð Control Box Diagram SizesFig. 20 Ð Field Control Thermostat Wiring CV or VAV UnitsFig. 22 Ð Space Temperature Averaging Wiring Table 5 Ð CCN Connection Approved Shielded CablesStep 9 Ð Make Outdoor-AirInlet Adjustments Table 6 Ð Color Code RecommendationsHood Sides Fig. 23 Ð Adding Seal Strip to Top of Hood SidesFig. 25 Ð Adding Seal Strip to Mounting Flange of Fig. 26 Ð Adding Seal Strip to Hood TopFig. 29 Ð Adding Foam Strip to Blockoff Baffle to Filter Track AssemblyFig. 28 Ð Adding Foam Strip to Hood Side Fig. 30 Ð Mounting Angle Without Tabs AttachedFilter Track Assembly Fig. 31 Ð Mounting Angle With Tabs Attached toFig. 32 Ð Attaching Seal Strip to Filter Cover Enthalpy Control HH57AC077 Fig. 34 Ð Wiring Connections for Solid-StateFig. 35 Ð Psychrometric Chart for Enthalpy ControlFig. 37 Ð Barometric Relief Damper and Power Exhaust Mounting DetailsFig. 38 Ð Pressure Transducer Locations Fig. 39 Ð Motormaster III Baffle DetailsSTART-UP Fig. 41 Ð VFD Factory-InstalledJumpers Table 7 Ð VFD Supply Air Pressure Set PointDirect Digital Controls DIP Switch Congura Table 8 Ð Potentiometer Signal LevelsTable 9 Ð Power Exhaust Default Set Points Table 10 Ð DIP Switch CongurationTable 11 Ð DIP Switch Factory Settings AIRFLOW AIRFLOW 3.20 Table 15 Ð Fan Performance Ð Power Exhaust Table 16 Ð Motor LimitationsSequence of Operation Table 17 Ð Air Quantity LimitsTable 18 Ð User Dened Set Points GAS HEATING, VARIABLE AIR VOLUME VAV UNITS Fig. 42 Ð Heat Interlock Relay Wiring Fig. 43 Ð Space Temperature Reset WiringFig. 44 Ð Field-SuppliedSmoke Detector Wiring Table 19 Ð Smoke Control Modeswith 2 Compressors and 2 Unloaders SERVICEwith 2 Compressors Fig. 45 Ð Door LatchFig. 46 Ð Spark Gap Adjustment LubricationEvaporator Fan Performance Adjustment Evaporator Fan Service and ReplacementBelt Tension Adjustment Ð To adjust belt tension Fig. 47 Ð Typical Gas Heating SectionGas Valve Adjustment Evaporator-FanMotor ReplacementCondenser-FanAdjustment Fig. 49 Ð Evaporator-FanAlignment and AdjustmentFig. 52 Ð Cooling Charging Chart Fig. 50 Ð Belt Tension AdjustmentFig. 51 Ð Condenser-FanAdjustment Fig. 53 Ð Cooling Charging ChartFig. 54 Ð Gas Valve Fig. 55 Ð Main Burner Removal Ð Adjustable Heat Anticipator Page Fig. 57 Ð Typical VAV 115-vControl Circuit Fig. 58 Ð Typical CV 115-vControl Circuit Fig. 59 Ð Typical VAV 24-vControl Circuit Fig. 60 Ð Typical CV 24-vControl Circuit TROUBLESHOOTING LEGEND FPS Ð Freeze Protection Switch HPS Ð High-PressureSwitchLPS Ð Low-PressureSwitch LEGEND FPS Ð Freeze Protection Switch HPS Ð High-PressureSwitchLPS Ð Low-PressureSwitch Fig. 64 Ð IGC Control Heating and Cooling LEGEND IDM Ð Induced-DraftMotorIGC Ð Integrated Gas Unit Controller Table 22 Ð IGC Control Board LED Alarms Table 23 Ð Control Board LED AlarmsPage PACKAGED SERVICE TRAINING TEMPERATURES PRE-START-UPELECTRICAL PRESSURESGENERAL