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Copeland Discus Series
Emerson Copeland Discus Series User Manual
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Application Guidelines
Semi-Herme
tic Compre
ssors
Discus, K, L & S-Series
2
Table of Contents
Default Chapter
2
Table of Contents
2
1 Safety Instructions
6
Icon Explanation
6
Safety Statements
6
General Instructions
7
2 Product Description
8
Common Information about Copeland™ Semi-Hermetic Compressors
8
About These Guidelines
8
Nomenclature
8
Air- or Water-Cooled Compressors
8
Suction Gas-Cooled Compressors
9
Nameplate Information
10
DWM Copeland Designation (Old Models)
10
Copeland Brand Designation (Present Models)
11
Application Range
11
Qualified Refrigerants and Oils
11
Application Limits
11
Design Features
12
Construction
12
Compressor Cooling
13
Unloaded Start
13
Capacity Control
14
Demand Cooling
14
Discharge Temperature Control Valve (DTC)
14
Running Gear Lubrication
14
Oil Pumps - Suction Gas-Cooled Compressors
15
Oil Pressure
15
Oil Circulation
15
Oil Level
16
Oil Separation & Management for Booster Applications
16
R22 Low Temperature Applications Using D2SA-450/X Air & D2SC-550/X Air Compressors
16
3 Installation
17
Compressor Handling
17
Delivery
17
Transport and Storage
17
Positioning and Securing
17
Installation Location
18
Mounting Parts
18
Pressure Safety Controls
19
High-Pressure Control
19
Low-Pressure Control
19
Internal Pressure Relief Valve
19
Oil Pressure Switch
19
Maximum Allowable Pressures
20
Brazing Procedure
20
Screens
20
4 Electrical Connection
21
General Recommendations
21
Electrical Installation
21
Single-Phase Motors - Code C
21
Three-Phase Motors
22
Direct-On-Line Start Motors - Code T
22
Star-Delta Motor (Y/∆) - Code E
22
Part-Winding Motor (YY/Y) - Code a
22
Wiring Diagrams
22
Protection Devices
22
Motor Protection
23
Over-Current Thermal Protection Switch for Single-Phase Motors - System a
23
Thermistor Protection - System W
23
Discharge Temperature Protection
24
Demand Cooling
25
Oil Pressure Control
25
Oil Pressure Switch (OPS2)
25
SENTRONIC Oil Pressure Control
26
Oil Pressure Switch - ALCO FD 113 zu (A22 - 057)
26
Crankcase Heaters
27
5 Starting up & Operation
28
Leak Test
28
System Evacuation
28
Preliminary Checks - Pre-Starting
28
Charging Procedure
28
Initial Start-Up
29
Minimum Run Time
29
Recommended Inverter Range
29
6 Maintenance & Repair
30
Exchanging the Refrigerant
30
Refrigerant Retrofit from HFC to HFO/HFC Blends
30
Shut-Off Valves
30
Compressor Replacement
30
Lubrication and Oil Removal
30
Oil Additives
31
Unbrazing System Components
31
7 Troubleshooting
32
Lubrication Problems
32
Oil Dilution
32
Refrigerant Migration
32
Inadequate Suction Superheat
32
Acid Formation
33
Inadequate Compressor Cooling
33
High Discharge Temperatures
33
Motor Burnout Due to Undersized Contactors
33
Motor Burnout Due to By-Passed or Disconnected Protectors
33
8 Dismantling & Disposal
33
Appendix 1 - Compressor Connections
34
Standard Compressor Connections
34
Discus Compressor Connections
40
Appendix 2 - Tightening Torques (Nm)
43
Disclaimer
44
4
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Emerson Copeland Discus Series Specifications
General
Brand
Emerson
Model
Copeland Discus Series
Category
Air Compressor
Language
English
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