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

Models: 50EK 50EY 50EW 50EJ

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NOTES:

1.Weights include economizer (Std)

2. Center of gravity.

3.Do not locate adjacent units with discharge facing economizer inlet. Minimum 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 Application Engineering department.

5. Dimensions are in inches. Dimensions in [ ] are in millimeters.

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

7.For side-supply/return applications, a single return and supply duct- work connection is recommended for covering both return and both supply air openings.

LEGEND

VFD Ð Variable Frequency Drive

	UNIT SIZE	OPERATING	A	B	CORNER WEIGHT
	UNIT SIZE	OPERATING	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
	W038	4282	7-75¤16	3-101¤2	961	858	1162	1302
	W/Y044	4508	7-313¤16	3-111¤2	973	868	1258	1409
	W048	4795	7-23¤16	3-103¤32	1007	915	1368	1505

Fig. 6 Ð Base Unit Dimensions, 50EW038-048 and 50EY044

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

Contents

SAFETY CONSIDERATIONS CONTENTSIMPORTANT Ð READ BEFORE INSTALLING INSTALLATION Step 1 Ð Provide Unit SupportUNIT LEVELING TOLERANCES DIMENSIONS Fig. 1 Ð Roof Curb SizesDegrees and Inches UNIT LEVELING TOLERANCES DIMENSIONS Fig. 2 Ð Roof Curb SizesDegrees and Inches Fig. 3 Ð Base Unit Dimensions, 50EJ/EK024-034 UNIT SIZE Fig. 5 Ð Base Unit Dimensions, 50EW/EY024-034 UNIT SIZE NOTICE TO RIGGERS ALL PANELS MUST BE IN PLACE WHEN RIGGINGFig. 7 Ð Rigging Label HIGH-PRESSURESWITCH psig Table 1 Ð Physical DataOPERATING WEIGHT lb Factory Speed Setting rpmHIGH-PRESSURESWITCH psig Table 1 Ð Physical Data contOPERATING WEIGHT lb Factory Speed Setting rpmFig. 9 Ð Air Distribution Ð Thru-the-Side Step 4 Ð Make Unit Duct ConnectionsTable 2 Ð Evaporator Fan Motor Data Fig. 8 Ð Air Distribution Ð Thru-the-BottomFeatures 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 PEC Ð Power Exhaust Controller Fig. 14 Ð Control Box Diagram SizesFig. 15 Ð Control Box Diagram Sizes PEC − Power Exhaust ControllerFig. 17 Ð Field Control Temperature Sensor Wiring Step 8 Ð Make Outdoor-AirInlet AdjustmentsFig. 16 Ð Field Control Thermostat Wiring Table 5 Ð CCN Connection Approved Shielded CablesFig. 20 Ð Adding Seal Strip to Fig. 18 Ð Adding Seal Strip to Top of Hood SidesMounting Flange of Hood Sides Fig. 22 Ð Adding Foam Strip to Cross Member Attached to Filter Track AssemblyFig. 21 Ð Adding Seal Strip to Hood Top Mounting FlangeFig. 28 Ð Differential Enthalpy Control Fig. 29 Ð Wire Connections for Solid StateFig. 30 Ð Psychrometric Chart for Fig. 27 Ð Attaching Seal Strip to Filter CoverExhaust 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 8 Ð Potentiometer Signal Levels Direct Digital Controls DIP Switch ConguraTable 9 Ð Power Exhaust Default Set Points 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 19 Ð Cooling Capacity Staging Table SERVICETable 18 Ð Cooling Capacity Staging Table CV Units with 2 CompressorsFig. 38 Ð Evaporator-FanPulley Alignment Evaporator Fan Service and Replacementand Adjustment LubricationFig. 39 Ð Belt Tension Adjustment Belt Tension Adjustment Ð To adjust belt tensionCondenser-FanAdjustment Evaporator-FanMotor ReplacementFig. 42 Ð Cooling Charging Chart Sizes Fig. 41 Ð Cooling Charging Chart SizesFig. 43 Ð Typical Refrigerant Circuiting TROUBLESHOOTING50EJ,EK,EW,EY024-034 HPS Ð High-PressureSwitch Fig. 44 Ð Typical Refrigerant Circuiting50EJ,EK,EW,EY038,044 LEGEND FPS Ð Freeze Protection SwitchHPS Ð High-PressureSwitch Fig. 45 Ð Typical Refrigerant Circuiting50EJ,EW048 LEGEND FPS Ð Freeze Protection SwitchTable 20 Ð Control Board LED Alarms Base Module Ð VAV Table 21 Ð I/O Channel DesignationsBase Module Ð CV Table 22 Ð I/O Channel DesignationsModule 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