Table of Contents
Safety Precautions .................................................................................................................... 5
Pre-Installation Checklist ........................................................................................................... 6
Items Shipped With the System ................................................................................................ 7
Necessary Tools ........................................................................................................................ 7
Typical Installation Setup ........................................................................................................... 8
Names and Functions of Each Part ........................................................................................... 8
Clearance Requirements ........................................................................................................... 9
Connection Pipe Requirements ............................................................................................... 10
Refrigerant Piping Precautions ................................................................................................ 11
Nitrogen Purging While Brazing .............................................................................................. 11
Installation Location ................................................................................................................. 12
Installing the Indoor Unit .......................................................................................................... 13
Mounting Location ................................................................................................................... 13
Drilling the Piping Hole ............................................................................................................ 14
Refrigerant Piping at the Indoor Unit ....................................................................................... 15
Installing the Condensate Pipe ................................................................................................ 17
Wiring at the Indoor Unit .......................................................................................................... 17
Binding the Pipes and Cables ................................................................................................. 19
Hanging the Indoor Unit........................................................................................................... 19
Installing the Outdoor Unit ....................................................................................................... 20
Condensate Management of the Outdoor Unit ........................................................................ 20
Installing the Refrigerant Piping............................................................................................... 21
Flaring Process and Bending Pipes ........................................................................................ 21
Refrigerant Piping at the Outdoor Unit .................................................................................... 22
Insulating the Refrigerant Piping and Connections ................................................................. 22
Piping Requirements ............................................................................................................... 23
Vacuum and Refrigerant Leakage Detection ........................................................................... 24
Wiring Precautions .................................................................................................................. 25
Outdoor Wiring Connections ................................................................................................... 25
Stranded Wiring Connections .................................................................................................. 26
Electrical Connections ............................................................................................................. 27
Power Supply Wiring ............................................................................................................... 28
Field Wiring and Grounding Requirements ............................................................................. 28
Installation of Controllers ......................................................................................................... 28
Post Installation Checklist........................................................................................................ 29
Test Operation ......................................................................................................................... 29
Refrigerant System Diagrams ................................................................................................. 30
Wiring Diagrams ...................................................................................................................... 31
Unit Dimensions ...................................................................................................................... 35
Common Error Codes............................................................................................................. 39
Troubleshooting ....................................................................................................................... 40
Auxillary Operation .................................................................................................................. 41
Indoor Unit Maintenance ......................................................................................................... 41
General Maintenance .............................................................................................................. 42
4 88-M4MHW18-1C-EN
Installer's Guide
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