Contents
1. Safety precautions ...................................................................... 3
1.1. Before installation and electric work ............................... 3
1.2. Precautions for devices that use R407C refrigerant ....... 3
1.3. Before getting installed ................................................... 4
1.4. Before getting installed (moved) - electrical work ........... 4
1.5. Before starting the test run ............................................. 4
2. Combination with indoor units..................................................... 5
3. Confirmation of parts attached ................................................... 5
4. Combination with outdoor units ................................................... 6
5. Selection of installation site ........................................................ 6
6. Space required around unit ........................................................ 6
6.1. Individual installation ...................................................... 6
6.2. Collective installation and continuous installation ........... 7
7. Lifting method and weight of product .......................................... 8
8. Installation of unit ........................................................................ 8
8.1. Location of anchor bolt ................................................... 8
8.2. Installation ...................................................................... 9
8.3. Connecting direction for refrigerant piping.................... 10
8.4. Noise level .................................................................... 10
9. Caution for snow and seasonal wind ........................................ 11
9.1. Snow and seasonal wind .............................................. 11
9.2. Countermeasure to seasonal wind ............................... 11
10. Refrigerant piping installation .................................................. 11
10.1. Areas of caution .......................................................... 12
10.2. Refrigerant piping system ........................................... 13
10.3. Caution for piping connection/valve operation ............ 15
10.4. How to install branch pipe ........................................... 16
10.5. Airtight test and evacuation, refrigerant charging........ 18
10.6. Thermal insulation of refrigerant piping....................... 21
11. Electrical work ......................................................................... 23
11.1. Caution ........................................................................ 23
11.2. Control box and connecting position of wiring............. 24
11.3. Wiring transmission cables ......................................... 25
11.4. Wiring of main power supply and equipment
capacity ....................................................................... 31
12. Test run.................................................................................... 32
12.1. Checking before getting test run ................................. 32
12.2. Test run method .......................................................... 32
12.3. How to cope with test run abnormality ........................ 33
12.4. Coping with remote controller abnormality.................. 35
12.5. The following phenomena do not represent
abnormality (emergency) ............................................ 36
2
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