Daikin RXY32MYL [2/346] Part 3 refrigerant circuit 3

Si38-304

Table of Contents i

R22 Heat Pump /

Cooling Only

R22 Heat Pump / Cooling Only ........................................................ i

1. Introduction ............................................................................................ vi

1.1 Safety Cautions ....................................................................................... vi

1.2 PREFACE ................................................................................................x

Part 1 General Information ........................................................... 1

1. Model Names of Indoor/Outdoor Units....................................................2

2. External Appearance...............................................................................3

2.1 Indoor Units ..............................................................................................3

2.2 Outdoor Units ...........................................................................................4

3. Combination of Outdoor Units.................................................................5

4. Capacity Range.......................................................................................6

Part 2 Specifications .................................................................... 7

1. Specifications ..........................................................................................8

1.1 Outdoor Units ...........................................................................................8

1.2 Indoor Units ............................................................................................41

Part 3 Refrigerant Circuit ........................................................... 63

1. Refrigerant Circuit .................................................................................64

1.1 RXY5M ...................................................................................................64

1.2 RXY8, 10, 12M .......................................................................................66

1.3 RXY14, 16M ...........................................................................................68

2. Functional Parts Layout ........................................................................70

2.1 RXY5M ...................................................................................................70

2.2 RXY8, 10, 12M .......................................................................................71

2.3 RXY14, 16M ...........................................................................................72

3. Refrigerant Flow for Each Operation Mode...........................................73

Part 4 Function............................................................................ 85

1. Operation Mode ....................................................................................86

2. Basic Control.........................................................................................87

2.1 Normal Operation ...................................................................................87

2.2 Compressor PI Control...........................................................................88

2.3 Electronic Expansion Valve PI Control...................................................94

2.4 Cooling Operation Fan Control...............................................................95

3. Special Control......................................................................................96

3.1 Startup Control .......................................................................................96

3.2 Oil Return Operation ..............................................................................97