Daikin RXYQ8MY1K [2/310] Part 1 general information

Si39-502A

Table of Contents i

R-410A Heat Pump

50/60Hz

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 ............................................................................................16

Part 3 Refrigerant Circuit ........................................................... 43

1. Refrigerant Circuit .................................................................................44

1.1 RXYQ8M, 10M .......................................................................................44

2. Functional Parts Layout ........................................................................46

2.1 RXYQ8M, 10M .......................................................................................46

3. Refrigerant Flow for Each Operation Mode...........................................47

Part 4 Function............................................................................ 51

1. Function General...................................................................................52

1.1 Symbol ...................................................................................................52

1.2 Operation Mode......................................................................................53

2. Basic Control.........................................................................................54

2.1 Normal Operation ...................................................................................54

2.2 Compressor PI Control...........................................................................55

2.3 Electronic Expansion Valve PI Control...................................................58

2.4 Step Control of Outdoor Unit Fans .........................................................58

2.5 Outdoor Unit Fan Control in Cooling Operation .....................................59

3. Special Control......................................................................................60

3.1 Startup Control .......................................................................................60

3.2 Oil Return Operation ..............................................................................61

3.3 Defrosting Operation ..............................................................................63

3.4 Pump-down Residual Operation ............................................................64

3.5 Standby ..................................................................................................65

3.6 Stopping Operation ................................................................................66

3.7 Pressure Equalization Prior to Startup ...................................................68