YMGI
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Your Modern Green Idea
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TABLE OF CONTENTS
Introduction ............................................................................................................................................. 3
Note from YMGI
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Must Read
................................................................................................................ 5
Installing Technician/Contractor's Responsibilities ................................................................................. 7
Limited Product Warranty ........................................................................................................................ 8
Limited Product Warranty Registration Card ........................................................................................... 10
Why Does YMGI Group Require Installation and Service to Be Performed
100% by Currently Licensed or Certified HVAC Technicians/Contractors .............................................. 11
Suggestions to Aid You in Hiring an HVAC Contractor .......................................................................... 11
Safety Precautions ................................................................................................................................... 12
Product Information .................................................................................................................................. 13
Preparation before Installation ................................................................................................................. 14
Installation Site ......................................................................................................................................... 14
Installation Instructions ............................................................................................................................ 16
Dimensions of Outdoor Unit(s) ................................................................................................................. 16
Piping Work Requirements ...................................................................................................................... 21
Connection Pipe ........................................................................................................................................ 23
Allowable Pipe Length and Drop Height .................................................................................................. 25
Fitting Pipe between Outdoor Unit and Manifolds ................................................................................... 28
Installation of Connection Pipe ............................................................................................................... 33
Air Purging and Refrigerant Charge ........................................................................................................ 37
Electric Wiring .......................................................................................................................................... 39
System Communication .......................................................................................................................... 42
Communication Connection between IDU and Wired Controller ............................................................. 48
Check Items after Installation and Trial Run ............................................................................................ 54
Debugging ................................................................................................................................................ 56
Appendix: Judgement Reference of Normal Operational Parameters .................................................... 65
Common Malfunction and Troubleshooting ............................................................................................ 67
Error Codes .............................................................................................................................................. 68
Debugging Codes .................................................................................................................................... 70
Status Codes ............................................................................................................................................ 70
Maintenance and Care ............................................................................................................................. 71
User Notes and Installation/Service/Maintenance Notes ........................................................................ 72
