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Carrier 50EW, 50EJ, 50EY, 50EK installation instructions Unit Size

Models: 50EK 50EY 50EW 50EJ

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NOTES:		LEGEND
1.	Weights include economizer (Std)	LEGEND
2.	Center of gravity.	VFD Ð Variable Frequency Drive

3.Do not locate adjacent units with discharge facing economizer inlet. Mini- mum clearances to be:

Adjacent Units: 15 -0

Top of Units: No overhang

Condenser Coil: 4 -0

Economizer Side: 6 -0

Filter Access Side: 10 -0 (for removal of evaporator coil)

4.For smaller service and operational clearances, contact Carrier Applica- tion 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. Dimensions in [ ] are in millimeters.

7.For units with electric heat, a ®eld-supplied 90° elbow must be installed in the supply ductwork below the unit discharge.

	UNIT SIZE	OPERATING	A	B	CORNER WEIGHT
	UNIT SIZE	WEIGHT	A	B		(lb)
	50E	WEIGHT				(lb)
	50E	(lb)	ft-in.	ft-in.	1	2	3	4
		(lb)	ft-in.	ft-in.	1	2	3	4
	J038	4282	7-75¤16	3-101¤2	961	858	1162	1302
	J/K044	4508	7-313¤16	3-111¤2	973	868	1258	1409
	J048	4795	7-23¤16	3-103¤32	1007	915	1368	1505

Fig. 4 Ð Base Unit Dimensions, 50EJ038-048 and 50EK044

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Carrier 50EW, 50EJ, 50EY, 50EK installation instructions Unit Size

Contents

IMPORTANT Ð READ BEFORE INSTALLING CONTENTSINSTALLATION Step 1 Ð Provide Unit Support SAFETY CONSIDERATIONSDegrees and Inches Fig. 1 Ð Roof Curb SizesUNIT LEVELING TOLERANCES DIMENSIONS Degrees and Inches Fig. 2 Ð Roof Curb SizesUNIT LEVELING TOLERANCES DIMENSIONS Fig. 3 Ð Base Unit Dimensions, 50EJ/EK024-034 UNIT SIZE Fig. 5 Ð Base Unit Dimensions, 50EW/EY024-034 UNIT SIZE Fig. 7 Ð Rigging Label WHEN RIGGINGNOTICE TO RIGGERS ALL PANELS MUST BE IN PLACE OPERATING WEIGHT lb Table 1 Ð Physical DataFactory Speed Setting rpm HIGH-PRESSURESWITCH psigOPERATING WEIGHT lb Table 1 Ð Physical Data contFactory Speed Setting rpm HIGH-PRESSURESWITCH psigTable 2 Ð Evaporator Fan Motor Data Step 4 Ð Make Unit Duct ConnectionsFig. 8 Ð Air Distribution Ð Thru-the-Bottom Fig. 9 Ð Air Distribution Ð Thru-the-SideFeatures with Thermostat Control of Unit Fig. 11 Ð Field Control Remote Start/Stop Fig. 12 Ð Control Board Diagram Step 7 Ð Make Electrical Connections Fig. 13 Ð Field Power Wiring Connections1.Remove cap from red 208-vwire Table 4 Ð Electrical Data Ð 50EJ,EK,EW,EY024-048 150/150 200/200 225/200 225/225 23.6 23.6 Fig. 15 Ð Control Box Diagram Sizes Fig. 14 Ð Control Box Diagram SizesPEC − Power Exhaust Controller PEC Ð Power Exhaust ControllerFig. 16 Ð Field Control Thermostat Wiring Step 8 Ð Make Outdoor-AirInlet AdjustmentsFig. 17 Ð Field Control Temperature Sensor Wiring Table 5 Ð CCN Connection Approved Shielded CablesMounting Flange of Hood Sides Fig. 18 Ð Adding Seal Strip to Top of Hood SidesFig. 20 Ð Adding Seal Strip to Fig. 21 Ð Adding Seal Strip to Attached to Filter Track AssemblyHood Top Mounting Flange Fig. 22 Ð Adding Foam Strip to Cross MemberFig. 30 Ð Psychrometric Chart for Fig. 29 Ð Wire Connections for Solid StateFig. 27 Ð Attaching Seal Strip to Filter Cover Fig. 28 Ð Differential Enthalpy ControlExhaust Mounting Details Fig. 31 Ð Barometric Relief Damper and PowerFig. 33A Ð Motormaster III Sensor Location Sizes Fig. 32 Ð Pressure Transducer LocationsFig. 33C Ð Motormaster III Sensor Location START-UP Table 9 Ð Power Exhaust Default Set Points Direct Digital Controls DIP Switch ConguraTable 8 Ð Potentiometer Signal Levels SETTING Sequence of Operation AIRFLOW AVAILABLE EXTERNAL STATIC PRESSURE in. wg Table 15 Ð Air Quantity Limits Table 17 Ð User Dened Set Points Table 16 Ð Motor LimitationsThe control module will operate economizer, run diag- nostics to monitor alarms/alerts at all times, and respond to CCN communications to perform any congured network POC product outboard control functions such as time/ outdoor-airtemperature broadcast and global occupancy broad- cast. When the optional expansion I/O board is employed, it will perform a periodic scan and maintain a database of ex- panded I/O points perform Fire/Smoke control power ex- haust required if in Occupied mode, perform IAQ control and monitor the fan, lter, demand limit, and eld-appliedstatus with accessories Fig. 36 Ð Space Temperature Sensor Wiring Fig. 35 Ð Heat Interlock Relay WiringTable 18 Ð Cooling Capacity Staging Table SERVICECV Units with 2 Compressors Table 19 Ð Cooling Capacity Staging Tableand Adjustment Evaporator Fan Service and ReplacementLubrication Fig. 38 Ð Evaporator-FanPulley AlignmentCondenser-FanAdjustment Belt Tension Adjustment Ð To adjust belt tensionEvaporator-FanMotor Replacement Fig. 39 Ð Belt Tension AdjustmentFig. 42 Ð Cooling Charging Chart Sizes Fig. 41 Ð Cooling Charging Chart Sizes50EJ,EK,EW,EY024-034 TROUBLESHOOTINGFig. 43 Ð Typical Refrigerant Circuiting 50EJ,EK,EW,EY038,044 Fig. 44 Ð Typical Refrigerant CircuitingLEGEND FPS Ð Freeze Protection Switch HPS Ð High-PressureSwitch50EJ,EW048 Fig. 45 Ð Typical Refrigerant CircuitingLEGEND FPS Ð Freeze Protection Switch HPS Ð High-PressureSwitchTable 20 Ð Control Board LED Alarms Base Module Ð CV Table 21 Ð I/O Channel DesignationsTable 22 Ð I/O Channel Designations Base Module Ð VAVModule Ð CV and VAV Table 23 Ð I/O Channel Designations ExpansionPage Page PACKAGED SERVICE TRAINING TEMPERATURES START-UPCHECKLISTPRE-START-UP ELECTRICALGENERAL START-UPCHECKLIST cont