Table Of Contents - Hitachi Set Free mini-HNRQ1 Series Installation & Maintenance Manual

Inverter-driven multi-split system heat pump air conditioners

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Service manual (187 pages)

Table of Contents

1. Safety Instructions ...........................................................................................................................................1

2. Before Installation ............................................................................................................................................4

2.1 Necessary Tools and Instrument List for Installation ...............................................................................4

2.2 Structure ..................................................................................................................................................6

2.3 Refrigerant Cycle Diagram ......................................................................................................................9

2.4 Model of Outdoor Unit ...........................................................................................................................10

2.5 Transportation ....................................................................................................................................... 11

2.6 Factory Supplied Accessories ...............................................................................................................12

3. Outdoor Unit Installation ................................................................................................................................12

3.1 Installation Location and Precautions ....................................................................................................12

3.2 Service Space .......................................................................................................................................14

3.3 Installation Work ....................................................................................................................................17

4. Refrigerant Piping Work ................................................................................................................................19

4.1 Precaution for Refrigerant Piping ..........................................................................................................19

4.2 Model of Branch Pipe ............................................................................................................................22

4.3 Refrigerant Piping Size ..........................................................................................................................24

4.4 Refrigerant Piping Work for Outdoor Unit ..............................................................................................25

4.5 Air Tight Test ..........................................................................................................................................27

4.6 Vacuuming .............................................................................................................................................28

4.7 Additional Refrigerant Charge Calculation ............................................................................................29

4.8 Additional Refrigerant Charge Work ......................................................................................................30

4.9 Pressure Measurement .........................................................................................................................30

5. Electrical Wiring .............................................................................................................................................31

5.1 General Check ......................................................................................................................................31

5.2 Electrical Wiring Connection .................................................................................................................32

5.3 Electrical Wiring for Outdoor Unit ..........................................................................................................34

6. DIP Switch Setting of Outdoor Unit ...............................................................................................................36

7. Test Run ........................................................................................................................................................38

7.1 Before Test Run .....................................................................................................................................38

7.2 Test Run by DIP Switch of Outdoor Unit................................................................................................38

7.3 Test Run by Wired Controller ................................................................................................................39

8. Safety and Control Device Setting ................................................................................................................44

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