Table of Contents
Models ................................................................................................................................................................................................................................ii
IMPORTANT NOTICE .........................................................................................................................................................................................................iii
1. Safety Summary ..........................................................................................................................................................................................................1
2. Before Installation .......................................................................................................................................................................................................7
2.1 About This Product .............................................................................................................................................................................................7
2.2 Line-Up of Outdoor Units ...................................................................................................................................................................................9
2.3 Combination of Indoor Unit and Outdoor Unit ...............................................................................................................................................12
2.4 CH-Box (Optional) for Heat Recovery System .................................................................................................................................................14
2.5 Piping Connection Kit (Optional) between Outdoor Units .............................................................................................................................14
2.6 Multi-Kit (Optional) between Indoor Unit and Outdoor Unit .........................................................................................................................15
2.7 Factory-Supplied Accessories ..........................................................................................................................................................................16
3. Selection of Installation Location ...................................................................................................................................................................................... 19
3.1 Installation Location .........................................................................................................................................................................................19
3.2 Service Space and Installation Area .................................................................................................................................................................19
4. Installation Work .......................................................................................................................................................................................................22
4.1 Transportation and Handling ...........................................................................................................................................................................22
4.1.1 Transportation .......................................................................................................................................................................................22
4.1.2 Handling of Outdoor Unit .....................................................................................................................................................................23
4.2 Outdoor Unit Installation .................................................................................................................................................................................24
4.2.1 Foundation ............................................................................................................................................................................................24
4.2.2 Drain Water Treatment ..........................................................................................................................................................................26
5. Refrigerant Piping Work ............................................................................................................................................................................................27
5.1 Piping Materials ................................................................................................................................................................................................27
5.2 Flaring and Joint ...............................................................................................................................................................................................30
5.3 Caution about Outdoor Unit Installation ........................................................................................................................................................31
5.4 Piping Connection Work ..................................................................................................................................................................................32
5.4.1 Removing of Closing Pipes ...................................................................................................................................................................32
5.4.2 Piping Connection Method ...................................................................................................................................................................34
5.4.3 Piping Connection .................................................................................................................................................................................36
5.5 Piping Work between Outdoor Units ...............................................................................................................................................................43
5.5.1 Piping Size between Outdoor Units (Base Unit) ..................................................................................................................................47
5.5.2 Piping Size between Outdoor Units (2 Unit Combination) ..................................................................................................................48
5.5.3 Piping Size between Outdoor Units (3 Unit Combination) ..................................................................................................................50
5.5.4 Piping Size between Outdoor Units (4 Unit Combination) ..................................................................................................................53
5.6 Piping Size, Piping Connection and Multi-Kit Selection (Heat Pump) ...........................................................................................................57
5.6.1 Connection between Outdoor Units and Connection Kit ....................................................................................................................57
5.6.2 Connection between Outdoor Units, Multi-Kits and Indoor Units ......................................................................................................59
5.7 Piping Branch Restrictions (Heat Pump) .........................................................................................................................................................60
5.8 Restrictions on Height Difference between Indoor Units (Heat Pump)..........................................................................................................61
5.9 Piping Size, Piping Connection and Multi-Kit Selection (Heat Recovery) ......................................................................................................62
5.9.1 Connection between Outdoor Units and Connection Kit ....................................................................................................................63
5.9.2 Connection between Outdoor Units, Multi-Kits and Indoor Units ......................................................................................................65
5.10 Restrictions on Height Difference (Heat Recovery) .........................................................................................................................................67
5.11 Piping Branch Restrictions (Heat Recovery) ....................................................................................................................................................68
6. Electrical Wiring .........................................................................................................................................................................................................70
6.1 General Check ...................................................................................................................................................................................................70
6.2 Electrical Wiring for Outdoor Unit....................................................................................................................................................................71
6.3 Electrical Wiring Connection ............................................................................................................................................................................72
6.4 Electrical Wiring Connection of Indoor Unit and Outdoor Unit ......................................................................................................................78
6.5 DIP Switch Setting for Outdoor Unit ................................................................................................................................................................81
7. Air-Tight Test and Additional Refrigerant Charge ....................................................................................................................................................85
7.1 Air-Tight Test .....................................................................................................................................................................................................85
7.2 Vacuuming ........................................................................................................................................................................................................87
7.3 Additional Refrigerant Charge Calculation ......................................................................................................................................................88
7.4 Charging Work ..................................................................................................................................................................................................90
8. Test Run .....................................................................................................................................................................................................................92
8.1 Before Test Run .................................................................................................................................................................................................92
8.2 Test Run.............................................................................................................................................................................................................93
9. Safety and Control Device Setting ............................................................................................................................................................................98
A16381Z84L-rev.1
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TABLE OF CONTENTS
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