4. ELECTRICAL WIRING . . . . . . . . . . . . . . . . . . 22
4-1. General Precautions on Wiring
4-2. Recommended Wire Length and Wire
Diameter for Power Supply System
4-3. Wiring System Diagram
5. HOW TO PROCESS TUBING . . . . . . . . . . . . . 26
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 . . . . . . . . . . . . . . . . . . . . . . . . . 30
■
Air Purging with a Vacuum Pump (for Test Run)
Preparation
7. TEST RUN . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
7-1. Preparing for Test Run
7-2. Test Run Procedure
7-3. Outdoor Unit PCB Setting
7-4. Auto Address Setting
7-5. Caution for Pump Down
7-6. Meaning of Alarm Messages
Page
6
IMPORTANT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Please Read Before Starting
Check of Density Limit
Precautions for Installation Using New Refrigerant
1. GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1-1. Tools Required for Installation (not supplied)
1-2. Accessories Supplied
1-3. Type of Copper Tube and Insulation Material
1-4. Additional Materials Required for Installation
1-5. Tubing Size
1-6. Straight Equivalent Length of Joints
1-7. Additional Refrigerant Charge
1-8. System Limitations
1-9. Tubing Length
1-10. Check of Limit Density
1-11. Installing Distribution Joint
1-12. Optional Distribution Joint Kit
1-13. Example of Tubing Size Selection and
Refrigerant Charge Amount
2. SELECTING THE INSTALLATION SITE . . . . . 14
2-1. Outdoor Unit
2-2. Air-Discharge Chamber for Top Discharge
2-3. Installing the Unit in Heavy Snow Areas
2-4. Precautions for Installation in Heavy Snow
Areas
2-5. Dimensions of Air-Discharge Chamber
2-6. Dimensions of Outdoor Unit with
Air-Discharge Chamber (field supply)
2-7. Dimensions of Snow Ducting
2-8. Dimensions of Outdoor Unit with Snow-Proof
Ducting (field supply)
3. HOW TO INSTALL THE OUTDOOR UNIT . . . 21
3-1. Installing the Outdoor Unit
3-2. Drainage Work
3-3. Routing the Tubing and Wiring
CONTENTS
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