Daikin RX12MY1 [25/255] Explanations on p h diagram refrigerant characteristics table 2 2 concept of basic refrigeration cycle 3 3 points of refrigerant control of vrv system 4

SiE30-408

Basic Information 21

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1. Explanations on P-H Diagram (Refrigerant Characteristics Table).......22

2. Concept of Basic Refrigeration Cycle ...................................................23

3. Points of Refrigerant Control of VRV System .......................................24

3.1 Cooling Operation ..................................................................................24

3.2 Heating Operation ..................................................................................25

3.3 Compressor Capacity Control ................................................................26

3.4 Control of Electronic Expansion Valve ...................................................27

4. Control of Indoor Unit............................................................................28

4.1 Thermostat-control .................................................................................28

4.2 Drain Pump Control................................................................................30

4.3 Freeze-up Prevention Control ................................................................31

4.4 Heater Control........................................................................................32

4.5 Thermostat Control in Cooling / Heating Automatic Operation ..............33

5. Other Functional Operations.................................................................35

5.1 Explanations on Main Functional Control...............................................35

5.2 Explanations on Electric and Functional Components...........................36