Section 2: Design Of Mini Vrf System - Panasonic U-36LE1U6 Technical Data Manual

Contents
1. Model Selecting and Capacity Calculator ......................................................................... 2-2
1-1. Operating Range ...........................................................................................................
1-2. Procedure for Selecting Models and Calculating Capacity ...........................................
1-3. Calculation of Actual Capacity of Indoor Unit ................................................................
1-4. Capacity Correction Graph According to Temperature Condition ................................
1-5. Capacity Correction Graph According to Tubing Length and Elevation Difference ....
2. System Design ................................................................................................................... 2-13
2-1. Tools Required for Installation (not supplied) ..............................................................
2-2. Accessories Supplied with Outdoor Unit
2-3. Type of Copper Tube and Insulation Material
2-4. Additional Materials Required for Installation...............................................................
2-5. Tubing Size ..................................................................................................................
2-6. Straight Equivalent Length of Joints
2-7. Additional Refrigerant Charge .....................................................................................
2-8. System Limitations
2-9. Tubing Length
2-10. Check of Limit Density ...............................................................................................
2-11. System Example
2-12. Example of Tubing Size Selection and Refrigerant Charge Amount
2-13. Installing Distribution Joint
3. Electrical Wiring .................................................................................................................
3-1. General Precautions on Wiring ...................................................................................
3-2. Recommended Wire Length and Wire Diameter for Power Supply System .................
3-3. Wiring System Diagrams .............................................................................................
3-4. Important Note When Wiring for Common Type .........................................................
3-5. Important Note When Wiring for Y1 Type.....................................................................
4. Installation Instructions.....................................................................................................
Outdoor Unit .................................................................................................................
4-1. Selecting the Installation Site for Outdoor Unit ............................................................
4-2. Air Discharge Chamber for Top Discharge
4-3. Installing the Unit in Heavy Snow Areas
4-4. Precautions for Installation in Heavy Snow Areas
4-5. Dimensions of Air-Discharge Chamber........................................................................
4-6. Dimensions of Outdoor Unit with Air-Discharge Chamber (field supply)
4-7. Dimensions of Snow Ducting ......................................................................................
4-8. Dimensions of Outdoor Unit with Snow-Proof Ducting (field supply)
4-9. Installing the Outdoor Unit
4-10. Drainage Work ...........................................................................................................
4-11. Routing the Tubing and Wiring ...................................................................................
Indoor Unit
* Refer to the 2WAY VRF SYSTEM TECHNICAL DATA (TD831157)
5. HOW TO PROCESS TUBING .............................................................................................
5-1. Connecting the Refrigerant Tubing ............................................................................
5-2. Connecting Tubing Between Indoor and Outdoor Units .............................................
5-3. Insulating the Refrigerant Tubing ...............................................................................
5-4. Taping the Tubes ........................................................................................................
5-5. Finishing the Installation ..............................................................................................
6. AIR PURGING ....................................................................................................................
Air Purging with a Vacuum Pump (for Test Run) Preparation..................................
7. Optional Parts .....................................................................................................................
7-1. Distribution Joint Kits ....................................................................................................
2. DESIGN OF MINI VRF SYSTEM
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2 - 1
Design of Mini VRF SYSTEM
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