TABLE OF CONTENTS
1 Important Safety Instructions 5
2 Nomenclature and Components 11
2.1 Liebert DSE Model-number Nomenclature 11
2.2 Component Location 13
2.3 Cooling Configurations 13
3 Pre-installation PreparationandGuidelines 17
3.1 Planning Dimensions 17
3.2 Air-distribution Considerations for Downflow Units 18
3.3 Air-distribution Considerations for Upflow Units 19
3.4 Connections and System Setup 19
3.5 Operating Conditions 20
3.5.1 Cooling, Dehumidification and Humidification 20
3.5.2 Heating 21
3.5.3 Humidification Control 22
3.6 Shipping Dimensions and Unit Weights 22
4 Equipment Inspection and Handling 23
4.1 Packaging Material 23
4.2 Handling the Unit while Packaged 24
4.3 Unpacking the Unit 25
4.3.1 Removing the Unit from the Skid with a Forklift 25
4.3.2 Removing the Unit from theSkid Using Rigging 26
4.3.3 Moving the Unit to the Installation Location Using Piano Jacks 28
4.4 Placing the Unit on a Floor Stand 30
5 Piping and Refrigerant Requirements 31
5.1 Drain and Humidifier Fluid Piping 32
5.1.1 Field-installed, Gravity-fed Drain Line Requirements 32
5.1.2 Condensate-pump Drain Line Requirements 34
5.1.3 Water Supply-line Requirements for the Optional Humidifier 34
5.2 Refrigerant Piping and Charging 35
5.2.1 Refrigerant Piping Guidelines forAir-cooledSystems 35
5.2.2 Refrigerant Line Sizes and Equivalent Lengths 36
5.2.3 Refrigerant Charge Requirements for Air-cooled Systems 37
5.2.4 Additional Oil Requirements forScrollandDigital-scrollCompressors 38
5.2.5 Evacuation, Leak-testing, and Charging Air-cooled Systems withReceivers 40
6 Electrical Connections 43
7 EC Fans and Plenums 45
7.1 Downflow Units with EC Fans 45
7.1.1 Lowering the EC Fans into the Floor Stand on Downflow Models 45
7.2 Downflow Units with Filter Plenums andUpflow-unitPlenumswithECFans 47
7.2.1 Downflow Unit Filter Plenums 47
7.2.2 Upflow Unit Plenums with EC Fans 48
8 Checklist for Completed Installation 49
8.1 Moving and Placing Equipment 49
8.2 Electrical Installation Checks 49
8.3 Piping Installation Checks 49
8.4 Other Installation Checks 49
9 Initial Start-up Checks andCommissioningProcedure forWarrantyInspection 51
Vertiv | Liebert® DSE™ Installer/User Guide | 3