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Design of 3WAY VRF SYSTEM
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Contents
Design of 3WAY VRF SYSTEM
Contents
2. DESIGN OF 3WAY VRF SYSTEM
1. Model Selection and Capacity Calculator..........................................................................
2-3
2-3
1-1. Operating Range ...........................................................................................................
2-4
1-2. Procedure for Selecting Models and Calculating Capacity............................................
2-5
1-3. Tubing Length................................................................................................................
2-8
1-4. Tubing Size....................................................................................................................
2-9
1-5. Straight Equivalent Length of Joints................................................................................
2-9
1-6. Additional Refrigerant Charge........................................................................................
2-10
1-7. System Limitations........................................................................................................
2-11
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Installation Standards...................................................................................................
2-39
6. HOW TO PROCESS TUBING .............................................................................................
2-40
6-2. Connecting Tubing Between Indoor and Outdoor Units ..............................................
2-39
6-1. Connecting the Refrigerant Tubing ..............................................................................
2-41
6-3. Insulating the Refrigerant Tubing .................................................................................
2-41
6-5. Finishing the Installation................................................................................................
2-42
7. AIR PURGING....................................................................................................................
2-42
Air Purging with a Vacuum Pump (for Test Run) Preparation
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...................................................................................................................
2. System Design
2-17
2-1. System Example..........................................................................................................
2-20
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2-3. Installing Distribution Joint
2-18
2-2. Example of Tubing Size Selection and Refrigerant Charge Amount............................
2-21
2-17
3. ELECTRICAL WIRING.........................................................................................................
2-21
3-2.
Recommended Wire Length and Wire Diameter for Power Supply System
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2-21
3-1. General Precautions on Wiring ....................................................................................
2-34
5. HOW TO INSTALL THE OUTDOOR UNIT..........................................................................
2-34
5-1. Transporting..................................................................................................................
2-24
3-4. Connecting Multiple Indoor Units to a Single Solenoid Valve Kit..................................
2-22
3-3. Wiring System Diagram................................................................................................
2-28
4. SELECTING THE INSTALLATION SITE.............................................................................
4-6. Dimensions of Snow Ducting........................................................................................
2-29
4-2. Shield for Horizontal Exhaust Discharge......................................................................
2-29
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4-3. Installing the Outdoor Unit in Heavy Snow Areas
2-29
4-4. Precautions When Installing in Heavy Snow Areas .....................................................
4-5. Dimensions of Wind Ducting.........................................................................................2-30
2-32
2-34
5-2. Installing the Outdoor Unit ...........................................................................................
2-35
5-3. Routing the Tubing .......................................................................................................
2-36
5-4. Prepare the Tubing........................................................................................................
2-36
5-5. Connect the Tubing......................................................................................................
* Refer to the 3WAY VRF SYSTEM TECHNICAL DATA (TD831158)
2-28
4-1. Outdoor Unit
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Indoor Unit
2-41
6-4. Taping the Tubes .........................................................................................................
2-12
1-10. Calculation of Actual Capacity of Indoor Unit..............................................................
2-11
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Check of Limit Density..................................................................................................
TD831183-00_北米向け3WAY.indb 1
15/12/17 16:05:05
Содержание U-120MF2U9
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