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

Models: 50EK 50EY 50EW 50EJ

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

Contents

CONTENTS IMPORTANT Ð READ BEFORE INSTALLINGINSTALLATION Step 1 Ð Provide Unit Support SAFETY CONSIDERATIONSUNIT 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 Table 1 Ð Physical Data OPERATING WEIGHT lbFactory Speed Setting rpm HIGH-PRESSURESWITCH psigTable 1 Ð Physical Data cont OPERATING WEIGHT lbFactory Speed Setting rpm HIGH-PRESSURESWITCH psigStep 4 Ð Make Unit Duct Connections Table 2 Ð Evaporator Fan Motor DataFig. 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 Fig. 13 Ð Field Power Wiring Connections Step 7 Ð Make Electrical 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. 14 Ð Control Box Diagram Sizes Fig. 15 Ð Control Box Diagram SizesPEC − Power Exhaust Controller PEC Ð Power Exhaust ControllerStep 8 Ð Make Outdoor-AirInlet Adjustments Fig. 16 Ð Field Control Thermostat WiringFig. 17 Ð Field Control Temperature Sensor 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 Attached to Filter Track Assembly Fig. 21 Ð Adding Seal Strip toHood Top Mounting Flange Fig. 22 Ð Adding Foam Strip to Cross MemberFig. 29 Ð Wire Connections for Solid State Fig. 30 Ð Psychrometric Chart forFig. 27 Ð Attaching Seal Strip to Filter Cover Fig. 28 Ð Differential Enthalpy ControlFig. 31 Ð Barometric Relief Damper and Power Exhaust Mounting DetailsFig. 32 Ð Pressure Transducer Locations Fig. 33A Ð Motormaster III Sensor Location SizesFig. 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 16 Ð Motor Limitations Table 17 Ð User Dened Set PointsThe 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. 35 Ð Heat Interlock Relay Wiring Fig. 36 Ð Space Temperature Sensor WiringSERVICE Table 18 Ð Cooling Capacity Staging TableCV Units with 2 Compressors Table 19 Ð Cooling Capacity Staging TableEvaporator Fan Service and Replacement and AdjustmentLubrication Fig. 38 Ð Evaporator-FanPulley AlignmentBelt Tension Adjustment Ð To adjust belt tension Condenser-FanAdjustmentEvaporator-FanMotor Replacement Fig. 39 Ð Belt Tension AdjustmentFig. 41 Ð Cooling Charging Chart Sizes Fig. 42 Ð Cooling Charging Chart SizesFig. 43 Ð Typical Refrigerant Circuiting TROUBLESHOOTING50EJ,EK,EW,EY024-034 Fig. 44 Ð Typical Refrigerant Circuiting 50EJ,EK,EW,EY038,044LEGEND FPS Ð Freeze Protection Switch HPS Ð High-PressureSwitchFig. 45 Ð Typical Refrigerant Circuiting 50EJ,EW048LEGEND FPS Ð Freeze Protection Switch HPS Ð High-PressureSwitchTable 20 Ð Control Board LED Alarms Table 21 Ð I/O Channel Designations Base Module Ð CVTable 22 Ð I/O Channel Designations Base Module Ð VAVTable 23 Ð I/O Channel Designations Expansion Module Ð CV and VAVPage Page PACKAGED SERVICE TRAINING START-UPCHECKLIST TEMPERATURESPRE-START-UP ELECTRICALSTART-UPCHECKLIST cont GENERAL