Copeland YAD K1 Series Application Engineering Bulletin

SEPTEMBER 2024
Application Engineering
3-15 Ton YAD*K1 and YPD*K1 Copeland Scroll Compressors
BULLETIN NO: AE4-1491 R2
Contents
Safety
Important Safety Information
Responsibilities, Qualifications and Training
Terminal Venting and Other Pressurized System
Hazards
Flammable Refrigerant Hazards
Electrical Hazards
Hot Surface and Fire Hazards
Lifting Hazards
POE Oil Hazards
Precautions
Signal Word Definitions
INTRODUCTION
Nomenclature
Digital Compressor Operation
How it Works
APPLICATION CONSIDERATIONS
Operating Envelope
Scroll Temperature Protection
Shell Temperature
Pressure Fluctuations
Long Pipe Lengths / High Refrigerant Charge
Suction and Discharge Fittings
System Tubing Stress
Solenoid Valve and Coil
Accumulators
Off-Cycle Migration Control
Crankcase Heaters
Pump Out Cycle
Reversing Valves
Start Up and Shut Down
Discharge Check Valve
Compressor Cycling
Sound Characteristics
3 High Pressure Control
3 Low Pressure Control
Contaminant Control
3 Oil Type
4 Power Factor
4 Manifolded Compressor Replacement
4 Modulation Control
4
APPLICATION TESTS
4
Performance Modeling
4
Refrigerant Flow Control
6
ASSEMBLY LINE PROCEDURES
Assembly Line Brazing Procedure
7
Unbrazing System Components
7
Removing Compressors
7
Pressure Testing
Assembly Line System Charging Procedure
8 'Hipot' (AC High Potential) Motor Testing
8 Final Run Test
8
SERVICE PROCEDURES
8
Field Replacement
9
Removing Oil
9
Electrical
9
Compressor Replacement After a Motor Burn
9
Manifolded Compressor Replacement
9
Start-Up of a New or Replacement Compressor
10
Modulation Troubleshooting
10
Refrigerant Retrofits
10
Modulation Valve Replacement Procedure
10
Modulation Valve Replacement Procedure
11
Copeland Scroll Compressor Functional Check
11
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BULLETIN AE4-1491 R2
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