6.4.5 Piping Connection .......................................................................................................................27
TABLE OF CONTENTS
1. Safety Summary .............................................................................................................................................1
2. Structure .........................................................................................................................................................5
2.1 Outdoor Unit & Refrigerant Cycle ...........................................................................................................5
2.2 Necessary Tools and Instrument List for Installation ..............................................................................5
3. Before Installation ...........................................................................................................................................7
3.1 Line-Up of Outdoor Unit .........................................................................................................................7
3.2 Combination of Indoor Unit and Outdoor Unit ........................................................................................7
4. Transportation and Handling ...........................................................................................................................9
4.1 Transportation ........................................................................................................................................9
4.2 Handling of Outdoor Unit ......................................................................................................................10
5. Outdoor Unit Installation ............................................................................................................................... 11
5.1 Factory-Supplied Accessories .............................................................................................................. 11
5.2 Installation ............................................................................................................................................12
5.3 Service Space ......................................................................................................................................13
5.4 Foundation ...........................................................................................................................................15
5.5 Drain Water Treatment .........................................................................................................................17
6. Refrigerant Piping Work ................................................................................................................................18
6.1 Piping Materials ....................................................................................................................................18
6.2 Flaring and Joint ...................................................................................................................................20
6.3 Caution about Outdoor Unit Installation .......................................................................................21
6.4 Piping Connection for Cooling/Heating Changeover Operation System
..............................................23
6.4.1 Piping Size for AVWT-86U6SR to AVWT-154U6SS (Base Units)
...................................................24
............................... 24
6.4.3 Piping Size for AVWT-328U6SZ to AVWT-460U6SZ(Three Units Combination) ..............................25
6.4.4 Stop Valve ...................................................................................................................................26
7. Electrical Wiring ............................................................................................................................................33
7.1 General Check ..................................................................................................................................... 34
7.2 Electrical Wiring Connection ................................................................................................................35
7.3 Electrical Wiring for Outdoor Unit .........................................................................................................38
7.4 Electrical Wiring Connection of Indoor Unit, Outdoor Unit
................................................................. 40
7.5 Dip Switch Setting of Outdoor Unit .......................................................................................................42
8. Additional Refrigerant Charge .......................................................................................................................45
8.1 Air-Tight Test ........................................................................................................................................45
8.2 Vacuuming ............................................................................................................................................47
8.3 Additional Refrigerant Charge Calculation ...........................................................................................48
8.4 Charging Work .....................................................................................................................................59
8.5 Automatic Simple Judgement System for Refrigerant Amount ............................................................50
9. Test Run ........................................................................................................................................................52
9.1 Before Test Run ....................................................................................................................................52
9.2 Test Run ...............................................................................................................................................54
10. Safety and Control Device Setting ................................................................................................................59
IV
6.4.2 Piping Size for AVWT-182U6SZ to AVWT-307U6SZ (Two Units Combination)
ZZ