Carrier 50EK, 50EW, 50EY Typical Refrigerant Circuiting 50EJ,EK,EW,EY038,044

Page 47

LEGEND

FPS Ð Freeze Protection Switch

HPS Ð High-Pressure Switch

LPS Ð Low-Pressure Switch

Fig. 44 Ð Typical Refrigerant Circuiting

(50EJ,EK,EW,EY038,044)

47

Image 47

Contents Installation, Start-Up Service Instructions Roof Curb Sizes Unit Leveling Tolerances DimensionsRoof Curb Sizes Unit Size Operating Corner Weight 50EJ/EK Base Unit Dimensions, 50EJ/EK024-034Unit Size Operating Corner Weight Base Unit Dimensions, 50EJ038-048 and 50EK044Unit Size Operating Corner Weight 50EW/EY Base Unit Dimensions, 50EW/EY024-034Weight Base Unit Dimensions, 50EW038-048 and 50EY044Rigging Label Model Weight 50EJ/EK/EW/EYUnit 50EJ,EK,EW,EY Physical Data4282 4508 4795 Evaporator Fan Motor Data Make Unit Duct ConnectionsSAT Field Control Remote Start/Stop SIO CCNCOM Make Electrical Connections Field Power Wiring ConnectionsPage FLA LRA MCA MOCP² Electrical Data Ð 50EJ,EK,EW,EY024-04824.2 187 254 57.1 266 39.1 228 46.2 225/200 82.4 100 12.6 23.6 95.0 110 43.3 86.6 104.1 187 254 69.2 345 59.4 187 254 82.1 446 69.2 345 74.8 Control Box Diagram Sizes Color Code Recommendations Make Outdoor-Air Inlet AdjustmentsCCN Connection Approved Shielded Cables Adding Seal Strip to Top of Hood Sides Adding Seal Strip to Hood Top Mounting Flange Attaching Seal Strip To Filter Cover Barometric Relief Damper and Power Exhaust Mounting Details Pressure Transducer Locations Ð Motormaster III Sensor Location SET Point VFD Set PointPressure Voltage VFD Power Exhaust Default Set Points Direct Digital Controls DIP Switch ConguraPotentiometer Signal Levels POS Setting OpenSetting ClosedSequence of Operation Airflow Fan Performance, 50EJ/EK024-034 Ð Vertical Discharge Units16,000 CFM CV Fan Performance, 50EJ048 Ð Vertical Discharge UnitsAir Quantity Limits User Dened Set Points Motor LimitationsPage Heat Interlock Relay Wiring Stages Cooling Capacity Staging Table CV Units with 2 CompressorsStages Economizer Manufacturer Lubricant Evaporator Fan Service and ReplacementLubrication Evaporator-Fan Motor Replacement Belt Tension Adjustment Ð To adjust belt tensionCondenser-Fan Adjustment Cooling Charging Chart Sizes Troubleshooting Typical Refrigerant Circuiting 50EJ,EK,EW,EY038,044 Typical Refrigerant Circuiting 50EJ,EW048 DIP Control Board LED AlarmsLED Error Description Troubleshooting Blinks Code Comments Base Module Ð VAV I/O Channel DesignationsBase Module Ð CV IAQ I/O Channel Designations Expansion Module Ð CV and VAVPage Page Packaged Service Training START-UP Checklist General START-UP Checklist