TABLE OF CONTENTS
Important Safety Instructions 5
1 Nomenclature and Components 11
1.1 Liebert CWModel-number Nomenclature 11
1.2 Component Location 13
2 Pre-installation PreparationandGuidelines 15
2.1 Planning Dimensions 16
2.2 LocationConsiderations 17
2.3 Air-distributionConsiderations for Downflow Units 17
2.4 Air-distribution Considerations for Upflow Units 19
2.5 Connections and System Setup 20
2.6 Operating Conditions 20
2.6.1 Cooling, Dehumidification and Humidification 21
2.6.2 Heating 21
2.7 Shipping Dimensions and Unit Weights 21
3 Equipment Inspection and Handling 23
3.1 Packaging Material 24
3.2 Handling the Unit while Packaged 24
3.3 Unpacking the Unit 25
3.3.1 Removing the Unit from the Skid witha Forklift 25
3.3.2 Removing the Unit from theSkid Using Rigging 26
3.3.3 Moving the Unit to the InstallationLocationUsing PianoJacks 28
3.4 Placing the Unit on a Floor Stand 30
4 Piping Requirements 31
4.1 Drain and Humidifier Fluid Connections 32
4.1.1 Field-installed, Gravity-fed Drain Line Requirements 33
4.1.2 Condensate-pump Drain Line Requirements 35
4.1.3 Water Supply-line Requirements for the Optional Humidifier 35
4.2 Chilled-water Loop Piping Guidelines 36
4.2.1 Leak Checking for Unit and Field-installed Piping 37
5 Electrical Connections 39
6 EC Fans and Plenums 41
6.1 Downflow Units with EC Fans 41
6.1.1 Lowering the EC Fansintothe Floor Stand on Downflow Models 41
6.2 Upflow-unit Plenums with EC Fans 45
6.2.1 Assembly inspection 46
6.2.2 Assemble plenum rear and side panels 51
6.2.3 Place assembled panels and EC fans ontop of unit 54
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