Carrier
50EW, 50EY, 50EK
installation instructions
Typical Refrigerant Circuiting 50EJ,EW048
Troubleshooting
Control Box Diagram Sizes
Potentiometer Signal Levels
Field Power Wiring Connections
Condenser-Fan Adjustment
Setting Open
Checklist
Weight
Packaged Service Training
Page 48
LEGEND
FPS Ð
Freeze Protection Switch
HPS Ð
High-Pressure
Switch
LPS Ð
Low-Pressure
Switch
Fig. 45 Ð Typical Refrigerant Circuiting
(50EJ,EW048)
48
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Image 48
Page 47
Page 49
Contents
Installation, Start-Up Service Instructions
Unit Leveling Tolerances Dimensions
Roof Curb Sizes
Roof Curb Sizes
Base Unit Dimensions, 50EJ/EK024-034
Unit Size Operating Corner Weight 50EJ/EK
Base Unit Dimensions, 50EJ038-048 and 50EK044
Unit Size Operating Corner Weight
Base Unit Dimensions, 50EW/EY024-034
Unit Size Operating Corner Weight 50EW/EY
Base Unit Dimensions, 50EW038-048 and 50EY044
Weight
Model Weight 50EJ/EK/EW/EY
Rigging Label
Physical Data
Unit 50EJ,EK,EW,EY
4282 4508 4795
Make Unit Duct Connections
Evaporator Fan Motor Data
SAT
Field Control Remote Start/Stop
CCN
COM
SIO
Field Power Wiring Connections
Make Electrical Connections
Page
Electrical Data Ð 50EJ,EK,EW,EY024-048
FLA LRA MCA MOCP²
24.2
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
Make Outdoor-Air Inlet Adjustments
CCN Connection Approved Shielded Cables
Color Code Recommendations
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
VFD Set Point
Pressure Voltage VFD
SET Point
Direct Digital Controls DIP Switch Congura
Potentiometer Signal Levels
Power Exhaust Default Set Points
Setting Open
Setting
Closed
POS
Sequence of Operation
Fan Performance, 50EJ/EK024-034 Ð Vertical Discharge Units
Airflow
16,000
Fan Performance, 50EJ048 Ð Vertical Discharge Units
Air Quantity Limits
CFM CV
Motor Limitations
User Dened Set Points
Page
Heat Interlock Relay Wiring
Cooling Capacity Staging Table CV Units with 2 Compressors
Stages Economizer
Stages
Evaporator Fan Service and Replacement
Lubrication
Manufacturer Lubricant
Belt Tension Adjustment Ð To adjust belt tension
Condenser-Fan Adjustment
Evaporator-Fan Motor Replacement
Cooling Charging Chart Sizes
Troubleshooting
Typical Refrigerant Circuiting 50EJ,EK,EW,EY038,044
Typical Refrigerant Circuiting 50EJ,EW048
Control Board LED Alarms
LED Error Description Troubleshooting Blinks Code Comments
DIP
I/O Channel Designations
Base Module Ð CV
Base Module Ð VAV
I/O Channel Designations Expansion Module Ð CV and VAV
IAQ
Page
Page
Packaged Service Training
START-UP Checklist
START-UP Checklist
General
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