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York Manuals
Chiller
CodePak YK L1 L1 G4
Operation manual
Table Of Contents - York CodePak YK L1 L1 G4 Operation Manual
Centrifugal liquid chillers styles a & b with microcomputer control center part 371-01200-004 for electro-mechanical starter & solid state starter
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Table Of Contents
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Contents
Table of Contents
Troubleshooting
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Table of Contents
Table Of Contents
2
Nomenclature
2
Product View
3
Section 1 - Description Of System And Fundamentals Of Operation
3
Capacity Control
4
Compressor Prerotation Vanes
4
Rerfigerant Flow-Thru
4
Section 2 - Microcomputer Control Center
5
Operation
7
To Display Chilled Liquid Temperatures
8
To Display Refrigerant Pressure
8
To Display Oil Pressure
8
To Display Options
8
System Setpoints
9
Chilled Liquid Temp
9
To Display Condenser Liquid Temperatures
9
To Initiate A Print To Printer
9
Pull Down Demand
10
Daily Schedule
10
Remote/Reset Temp Range
10
Sss Motor Current/Volts
10
Displaying System Setpoints
11
To Display Chilled Liquid Temp Setpoint
11
To Display % Current Limit Setpoint
11
To Display Pull Down Demand Setpoint
11
To Display Holiday Setpoints
12
To Display Remote Reset Temp Range Setpoint
12
To Display Undervoltage Setpoints
12
The Micromputer Control Center
13
Programming System Setpoints
13
To Enter Chilled Liquid Temp Setpoints
14
To Enter % Current Limit Setpoint
14
To Enter Pull Down Demand Setpoint
15
To Enter Clock Setpoint
15
To Enter Daily Schedule Setpoint
16
To Enter Holiday Setpoint
17
To Enter Remote/Reset Temp Range Setpoint
17
Service Keys
18
Pre-Rotation Vanes Keys
18
Operating Modes
19
Manual Oil Pump
19
Display Data
19
Remove Current Limit Setpoint
19
Compressor Switch
20
To Change Operating Mode
20
To Start Chiller Compressor In Local Mode
20
To Reset Control Center
20
Display Messages
21
System Shutdown Messages
22
Pre-Starting
28
Section 3 - System Operating Procedures
28
Start-Up
29
System Starting And Shutdown Sequence Operator Initiated
30
Condenser Water Temperature Control
30
Checking Operation
31
Operating Log Sheet
31
Operating Inspections
32
Need For Maintenance Or Service
33
Normal And Safety System Shutdown
33
Cycling Shutdowns
33
Stopping The System
33
Prolonged Shutdown
34
Start-Up After Prolonged Shutdown
34
Section 4 – System Component Description
35
Compressor
36
Lubrication System Of Compressor
36
Oil Pump
36
Oil Heater
37
Motor Driveline
37
Heat Exchanger
37
Refrigerant Flow Control
37
Schematic Drawing - Compressor Lubrication System
38
Solid State Starter
39
Oil Return System
39
Changing The Dehydrator
39
Section 5 - Operational Maintenance
39
The Oil Charge
40
Troubleshooting
41
Section 6 - Trouble Shooting
41
Operating Analysis Chart
44
Abnormally High Discharge Pressure
44
Anbormally Low Suction Pressure
44
High Cooler Pressure/No Oil Pressure When System Start Button Pushed
44
Usually High Oil Pressure Develops When Oil Pump Runs
45
Oil Pump Vibrates Or Is Noisy
45
Oil Pump Fails To Deliver Oil Pressure
45
Reduced Oil Pump Capacity
45
Checking System For Leaks
46
Evacuation And Dehydration Of Unit
46
Section 7 - Maintenance
46
System Pressures Table
47
Vacuum Testing
48
Vacuum Dehydration
48
Refrigerant Charging
49
Saturation Curve
49
Checking The Refrigerant Charge During Unit Shutdown
50
Megging The Motor
50
Motor Stator Temperature And Insulation Resistances
51
Condensers And Coolers
52
Chemical Water Treatment
52
Cooler
52
Tube Cleaning Procedures
52
Testing For Cooler And Condenser Tube Leaks
53
Pressure Testing
55
Section 8 - Preventive Maintenance
55
Electrical Controls
56
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This manual is also suitable for:
Codepak yk s2 s2 j4
Codepak yk se sc j2
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