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.................................................................................................... 5
1-5. Precautions for electrical wiring ............................................................................................. 5
1-6. Precautions for relocating or repairing the unit ...................................................................... 6
1-7. Additional precautions ............................................................................................................ 6
2. About the product ················································································· 9
3. Combination of outdoor units ································································10
4. Specifications ······················································································ 11
5. Package contents ·················································································12
6. Transporting the unit ············································································13
7. Installation location ··············································································14
7-1. Single unit installation .......................................................................................................... 14
7-2. Multiple unit installation ........................................................................................................ 15
8. Foundation work ··················································································17
9. Refrigerant piping work ········································································20
9-1. Restrictions .......................................................................................................................... 20
9-2. Pipe selection....................................................................................................................... 23
9-3. Twinning kit selection ........................................................................................................... 23
9-4. Pipe connection example ..................................................................................................... 24
9-5. Piping connections and valve operations ............................................................................ 29
9-6. Air-tightness test .................................................................................................................. 33
9-7. Thermal insulation for pipes ................................................................................................. 34
9-8. Evacuation of the system ..................................................................................................... 36
9-9. Additional refrigerant charge ................................................................................................ 37
10. Electrical work ···················································································43
10-1. Before electrical work......................................................................................................... 43
10-2. Power cables and device capacity ..................................................................................... 43
10-3. Control cable specifications ............................................................................................... 45
10-4. System configuration ......................................................................................................... 46
10-5. Wiring connections in the control box ................................................................................ 49
10-6. Address setting .................................................................................................................. 54
11. Test run ·····························································································55
11-1. Before a test run ................................................................................................................. 55
11-2. Function setting .................................................................................................................. 56
11-3. Operation characteristics in relation to the refrigerant charge ........................................... 57
11-4. Operation check ................................................................................................................. 57
12. Inspection and maintenance ································································58
13. Rating plate information ······································································59
WT09973X01
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