Contents 
Preface ...................................................................................................................... 1 
Chapter 1 Introduction to Basic Features of Units ................................................ 1 
1.1 Basic Operating Principle ................................................................................................ 1 
1.2 Model list ......................................................................................................................... 2 
1.3 Internal Piping Design of the Units .................................................................................. 3 
1.4 Basic Parameters of Unit ................................................................................................ 7 
1.5 Electrical Parameters .................................................................................................... 11 
1.6 Optional Accessories .................................................................................................... 15 
1.7 Basic Requirement for Pipe Connection ....................................................................... 16 
1.8 Precautions on Refrigerant Leakage ............................................................................ 19 
1.9 Unit Operating Temperature .......................................................................................... 19 
Chapter 2 Installation ............................................................................................. 20 
1 Engineering Installation Preparation ................................................................. 20 
1.1 Installation Safety .......................................................................................................... 20 
1.2 Importance of Installation Engineering .......................................................................... 20 
1.3 Cooperation Between Different Professions ................................................................. 22 
1.4 Onsite Review of Design Drawing ................................................................................ 24 
1.5 Construction Organization Process .............................................................................. 25 
2 Material Selection ................................................................................................ 25 
2.1 Requirement for Selecting Construction Materials ........................................................ 25 
2.2 Requirement for Selecting Major Materials ................................................................... 26 
3 Installation Space Requirement ......................................................................... 27 
3.1 Place Selection for Installing ODU ................................................................................ 27 
3.2 ODU Dimensions and Installation Hole Size ................................................................. 28 
3.3 Installation Space Requirement for ODU ...................................................................... 29 
4 Requirements on Foundation Installation .......................................................... 36 
4.1 ODU Foundation ........................................................................................................... 36 
4.2 ODU Fixing ................................................................................................................... 36 
4.3 Vibration Reduction for ODU ........................................................................................ 37 
4.4 Precautions when installing the connection pipe .......................................................... 37 
5 Piping Connection ............................................................................................... 38 
5.1 Schematic Diagram of Piping Connection .................................................................... 38 
5.2 Schematic Diagram of Piping Sequence ...................................................................... 38 
5.3 Allowable pipe length and drop height among indoor and outdoor units ...................... 39 
5.4 Connection Pipe among Outdoor Modules ................................................................... 41