Emerson Copeland Scroll YBVH021 1U-3E9 - Page 3

C6.2.38/0719/E
4.2.4 Removing the molded plug power cable ............................................................ 18
4.3 Wiring diagrams ............................................................................................................. 19
4.3.1 Motor windings ................................................................................................... 20
4.4 Protection devices .......................................................................................................... 20
4.5 Crankcase heating function ........................................................................................... 20
4.6 Pressure safety controls ................................................................................................ 20
4.6.1 High-pressure protection .................................................................................... 20
4.6.2 Low pressure protection ..................................................................................... 20
4.7 Discharge gas temperature protection ........................................................................... 21
4.7.1 Excessive discharge gas temperatures ............................................................. 21
4.7.2 Compressor discharge gas temperature protection ........................................... 22
4.8 High-potential testing ..................................................................................................... 22
5 Start-up & operation ....................................................................................... 23
5.1 Strength pressure test .................................................................................................... 23
5.2 Compressor tightness test ............................................................................................. 23
5.3 System evacuation ......................................................................................................... 23
5.4 Preliminary checks – Pre-starting .................................................................................. 24
5.5 Charging procedure ....................................................................................................... 24
5.6 Run-in time ..................................................................................................................... 25
5.7 Initial start-up ................................................................................................................. 25
5.8 Start and stop routine ..................................................................................................... 25
5.9 Starting sound ................................................................................................................ 25
5.10 Deep vacuum operation ................................................................................................. 25
5.11 Shell temperature ........................................................................................................... 25
5.12 Shell temperature ........................................................................................................... 25
5.13 Pump-down cycle ........................................................................................................... 25
5.14 Minimum run time .......................................................................................................... 26
5.15 Shut-off sound ................................................................................................................ 26
5.16 Oil level .......................................................................................................................... 26
6 Maintenance & repair ..................................................................................... 27
6.1 Qualification of workers .................................................................................................. 27
6.2 Preparation and work procedure ................................................................................... 28
6.3 Disassembling system components .............................................................................. 28
6.4 Provisions of legislation and leak check requirements .................................................. 28
6.5 Exchanging the refrigerant ............................................................................................. 28
6.6 Replacing a compressor ................................................................................................ 29
6.6.1 Compressor replacement ................................................................................... 29
6.6.2 Start-up of a new or replacement compressor ................................................... 29
6.6.3 Compressor return procedure ............................................................................ 29
6.7 Lubrication and oil removal ............................................................................................ 30