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Design of Mini VRF SYSTEM
1. Model Selecting and Capacity Calculator ........................................................................2-2
1-1. Operating Range ...........................................................................................................2-2
1-2. Procedure for Selecting Models and Calculating Capacity ...........................................2-3
1-3. Tools Required for Installation (not supplied) ................................................................2-4
1-4. Accessories Supplied with Outdoor Unit .......................................................................2-4
1-5. Type of Copper Tube and Insulation Material ................................................................2-4
1-6. Additional Materials Required for Installation ................................................................2-4
1-7. Tubing Size ....................................................................................................................2-5
1-8. Straight Equivalent Length of Joints ..............................................................................2-5
1-9. Additional Refrigerant Charge .......................................................................................2-6
1-10. System Limitations ......................................................................................................2-6
1-11. Tubing Length ..............................................................................................................2-6
1-12. Check of Limit Density .................................................................................................2-7
1-13. Calculation of Actual Capacity of Indoor Unit ..............................................................2-8
1-2. Procedure for Selecting Models and Calculating Capacity ...........................................2-3
1-3. Tools Required for Installation (not supplied) ................................................................2-4
1-4. Accessories Supplied with Outdoor Unit .......................................................................2-4
1-5. Type of Copper Tube and Insulation Material ................................................................2-4
1-6. Additional Materials Required for Installation ................................................................2-4
1-7. Tubing Size ....................................................................................................................2-5
1-8. Straight Equivalent Length of Joints ..............................................................................2-5
1-9. Additional Refrigerant Charge .......................................................................................2-6
1-10. System Limitations ......................................................................................................2-6
1-11. Tubing Length ..............................................................................................................2-6
1-12. Check of Limit Density .................................................................................................2-7
1-13. Calculation of Actual Capacity of Indoor Unit ..............................................................2-8
2. System Design..................................................................................................................2-13
2-1. System Example .........................................................................................................2-13
2-2. Example of Tubing Size Selection and Refrigerant Charge Amount ...........................2-15
2-3. Installing Distribution Joint ...........................................................................................2-17
2-2. Example of Tubing Size Selection and Refrigerant Charge Amount ...........................2-15
2-3. Installing Distribution Joint ...........................................................................................2-17
3. Electrical Wiring ...............................................................................................................2-18
3-1. General Precautions on Wiring ...................................................................................2-18
3-2. Recommended Wire Length and Wire Diameter for Power Supply System ................2-18
3-3. Wiring System Diagrams .............................................................................................2-19
3-2. Recommended Wire Length and Wire Diameter for Power Supply System ................2-18
3-3. Wiring System Diagrams .............................................................................................2-19
4. Installation Instructions ...................................................................................................2-27
4-1. Selecting the Installation Site for Outdoor Unit ............................................................2-27
4-2. Air Discharge Chamber for Top Discharge ..................................................................2-28
4-3. Installing the Unit in Heavy Snow Areas .....................................................................2-28
4-4. Precautions for Installation in Heavy Snow Areas .......................................................2-28
4-5. Dimensions of Air-Discharge Chamber .......................................................................2-29
4-6. Dimensions of Wind-proof Duct ...................................................................................2-35
4-7. Dimensions of Snow-Proof Vents ................................................................................2-37
4-8. Installing the Outdoor Unit ...........................................................................................2-41
4-9. Drainage Work .............................................................................................................2-41
4-10. Routing the Tubing and Wiring ..................................................................................2-41
4-2. Air Discharge Chamber for Top Discharge ..................................................................2-28
4-3. Installing the Unit in Heavy Snow Areas .....................................................................2-28
4-4. Precautions for Installation in Heavy Snow Areas .......................................................2-28
4-5. Dimensions of Air-Discharge Chamber .......................................................................2-29
4-6. Dimensions of Wind-proof Duct ...................................................................................2-35
4-7. Dimensions of Snow-Proof Vents ................................................................................2-37
4-8. Installing the Outdoor Unit ...........................................................................................2-41
4-9. Drainage Work .............................................................................................................2-41
4-10. Routing the Tubing and Wiring ..................................................................................2-41
Indoor Unit
* Refer to the 2WAY SYSTEM TECHNICAL DATA (TD831159)
5. HOW TO PROCESS TUBING ............................................................................................2-42
5-1. Connecting the Refrigerant Tubing ..............................................................................2-42
5-2. Connecting Tubing Between Indoor and Outdoor Units ..............................................2-43
5-3. Insulating the Refrigerant Tubing .................................................................................2-43
5-4. Taping the Tubes ..........................................................................................................2-44
5-5. Finishing the Installation ..............................................................................................2-44
5-2. Connecting Tubing Between Indoor and Outdoor Units ..............................................2-43
5-3. Insulating the Refrigerant Tubing .................................................................................2-43
5-4. Taping the Tubes ..........................................................................................................2-44
5-5. Finishing the Installation ..............................................................................................2-44
6. AIR PURGING ...................................................................................................................2-45
Air Purging with a Vacuum Pump (for Test Run) Preparation ...................................2-45
7. Optional Parts ...................................................................................................................2-47
7-1. Optional Distribution Joint Kit (CZ-P160BK2) ..............................................................2-47
2. DESIGN OF MINI VRF SYSTEM
Contents
TD831155-04_MINI VRF.indb 1
TD831155-04_MINI VRF.indb 1
2014/05/09 15:28:26
2014/05/09 15:28:26
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