IV
MINI-SMMS INSTALLATION BOOK
Contents
WARNINGS ON REFRIGERANT LEAKAGE
SAFETY NOTES
CHECK POINTS
KEY POINTS FOR AIR CONDITIONER INSTALLATION
1. System Overview ............................................................................ 1-1
1-1. Outdoor units ................................................................................................................................ 1-1
1-2. Indoor units ................................................................................................................................... 1-2
1-3. Branching joints and headers ........................................................................................................ 1-4
1-4. PMV Kit ........................................................................................................................................ 1-4
1-5. Tools ............................................................................................................................................. 1-5
2. Outdoor unit, Indoor unit and PMV Kit installation ..................... 2-1
2-1. Outdoor unit Installation ................................................................................................................ 2-1
2-2. Indoor unit Installation ................................................................................................................... 2-5
2-3. PMV Kit Installation .................................................................................................................... 2-65
3. Refrigerant Pipe Installation .......................................................... 3-1
3-1. Work Procedure ............................................................................................................................ 3-1
3-2. Three Principles of Refrigerant Pipes ............................................................................................ 3-1
3-3. Selecting the refrigerant pipework material .................................................................................... 3-2
3-4. Refrigerant piping length and piping size ....................................................................................... 3-2
3-5. Careful Handling ......................................................................................................................... 3-11
3-6. Parts of Branching Header/Joint ................................................................................................. 3-13
3-7. Branching Kit Connection Method ............................................................................................... 3-14
3-8. External Dimensions of Branch Connectors (Outline drawings are shown on the following pages.) .... 3-16
3-9. Nitrogen Gas Blow Method (During Brazing) ............................................................................... 3-16
3-10. Brazing Work .............................................................................................................................. 3-17
3-11. Flare Processing ......................................................................................................................... 3-18
3-12. Flushing ...................................................................................................................................... 3-20
3-13. Pipe Connections to the Indoor Unit ............................................................................................ 3-21
3-14. Pipe Conection to the Outdoor Unit ............................................................................................. 3-22
3-15. Leak test .................................................................................................................................... 3-25
3-16. Charging requirment with additional refrigerant ............................................................................ 3-27
3-17. Insulation Work ........................................................................................................................... 3-29
3-18. Reference for Insulation Work ..................................................................................................... 3-31
4. Drain Pipe Installation .................................................................... 4-1
4-1. Natural Draining ............................................................................................................................ 4-1
4-2. Collective Drain Piping .................................................................................................................. 4-1
4-3. Selecting the Diameter for the Collective Pipe .............................................................................. 4-1
4-4. Drain Trap ...................................................................................................................................... 4-2
4-5. Drain Check .................................................................................................................................. 4-2
4-6. Cautions Concerning High Drains ................................................................................................ 4-10
5. Control Wiring .................................................................................. 5-1
5-1. Connection of Power Supply Cable with Control Wire .................................................................... 5-1
5-2. Design of contol wiring .................................................................................................................. 5-2
5-3. Example of system wiring Design ................................................................................................. 5-5