Mitsubishi Electric CITY MULTI PUHY-P-YKB-A1 Manuel D'installation page 3

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 ······················································································· 9
5. Package contents ·················································································10
6. Transporting the unit ············································································ 11
7. Installation location ··············································································12
7-1. Single unit installation .......................................................................................................... 12
7-2. Multiple unit installation ........................................................................................................ 13
8. Foundation work ··················································································15
9. Refrigerant piping work ········································································17
9-1. Restrictions .......................................................................................................................... 17
9-2. Pipe selection....................................................................................................................... 19
9-3. Twinning kit selection ........................................................................................................... 20
9-4. Pipe connection example ..................................................................................................... 20
9-5. Piping connections and valve operations ............................................................................ 23
9-6. Air-tightness test .................................................................................................................. 26
9-7. Thermal insulation for pipes ................................................................................................. 27
9-8. Evacuation of the system ..................................................................................................... 29
9-9. Additional refrigerant charge ................................................................................................ 30
10. Electrical work ···················································································34
10-1. Before electrical work......................................................................................................... 34
10-2. Power cables and device capacity ..................................................................................... 34
10-3. Control cable specifications ............................................................................................... 37
10-4. System configuration ......................................................................................................... 37
10-5. Wiring connections in the control box ................................................................................ 40
10-6. Address setting .................................................................................................................. 43
11. Test run ·····························································································44
11-1. Before a test run ................................................................................................................. 44
11-2. Function setting .................................................................................................................. 45
11-3. Operation characteristics in relation to the refrigerant charge ........................................... 45
11-4. Operation check ................................................................................................................. 46
12. Inspection and maintenance ································································47
13. Rating plate information ······································································48
KD79S703H01
GB-1