9.10.4 Compressor Motor Burnout 85
9.10.5 Unloading Solenoid(s) on a Digital-scroll Compressor 86
9.10.6 Replacing the Compressor 86
9.11 Facility Fluid and Piping Maintenance forWaterandGlycolSystems 87
9.12 Glycol Solution Maintenance 87
9.13 Motorized Ball Valve (MBV) Maintenance (Digital-scroll Compressors) 87
9.13.1 MBV Control 88
9.13.2 MBV Control Method 88
9.13.3 MBV Adjustment 88
9.13.4 MBV Start-up 88
9.13.5 MBV Location 88
9.13.6 MBV Manual Control 88
9.14 Drycooler Aquastat Settings 89
10 Preventive Maintenance Checklist 91
Appendices 97
Appendix A: Technical Support and Contacts 97
Appendix B: Liebert PDX Model-number Detail 99
Appendix C: Liebert PCW Model-number Detail 103
Appendix D: Submittal Drawings 106
Vertiv | Liebert® PDX™ and PCW™ Installer/User Guide | 5
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