Table of Contents
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CONTENTS
1. Safety precautions ················································································ 2
1-1. General precautions............................................................................................................... 2
1-2. Precautions for transporting the unit ...................................................................................... 3
1-3. Precautions for unit installation .............................................................................................. 4
1-4. Precautions for piping work.................................................................................................... 4
1-5. Precautions for electrical wiring ............................................................................................. 5
1-6. Precautions for relocating or repairing the unit ...................................................................... 5
1-7. Additional precautions ............................................................................................................ 6
2. About the product ················································································· 8
3. Combination of outdoor units ································································· 8
4. Specifications ······················································································· 8
5. Package contents ·················································································· 8
6. Transporting the unit ············································································· 9
7. Installation location ··············································································10
7-1. Single unit installation .......................................................................................................... 10
7-2. Multiple unit installation ........................................................................................................ 11
8. Foundation work ··················································································13
9. Refrigerant piping work ········································································15
9-1. Restrictions .......................................................................................................................... 15
9-2. Pipe selection....................................................................................................................... 17
9-3. Twinning kit selection ........................................................................................................... 18
9-4. Pipe connection example ..................................................................................................... 18
9-5. Piping connections and valve operations ............................................................................ 20
9-6. Air-tightness test .................................................................................................................. 22
9-7. Thermal insulation for pipes ................................................................................................. 23
9-8. Evacuation of the system ..................................................................................................... 25
9-9. Additional refrigerant charge ................................................................................................ 26
10. Electrical work ···················································································28
10-1. Before electrical work......................................................................................................... 28
10-2. Power cables and device capacity ..................................................................................... 28
10-3. Control cable specifications ............................................................................................... 30
10-4. System configuration ......................................................................................................... 30
10-5. Wiring connections in the control box ................................................................................ 31
10-6. Address setting .................................................................................................................. 33
11. Test run ·····························································································34
11-1. Before a test run ................................................................................................................. 34
11-2. Function setting .................................................................................................................. 35
11-3. Operation characteristics in relation to the refrigerant charge ........................................... 35
11-4. Operation check ................................................................................................................. 35
12. Inspection and maintenance ································································36
13. Rating plate information ······································································37
VG79D920H01
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