Daikin RXYQ72MTJU [2/273] R 410a heat pump 60hz

SiUS39-601

Table of Contents i

R-410A Heat Pump

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 ............................................................................................... 3

3. Model Selection...........................................................................................4

Part 2 Specifications ....................................................................... 5

1. Specifications ..............................................................................................6

1.1 Outdoor Units ............................................................................................... 6

1.2 Indoor Units ................................................................................................ 11

Part 3 Refrigerant Circuit .............................................................. 23

1. Refrigerant Circuit .....................................................................................24

1.1 RXYQ72M, 96M ......................................................................................... 24

2. Functional Parts Layout ............................................................................26

2.1 RXYQ72M, 96M ......................................................................................... 26

3. Refrigerant Flow for Each Operation Mode...............................................27

Part 4 Function............................................................................... 31

1. Operation Mode ........................................................................................32

2. Basic Control.............................................................................................33

2.1 Normal Operation ....................................................................................... 33

2.2 Compressor PI Control............................................................................... 34

2.3 Electronic Expansion Valve PI Control....................................................... 38

2.4 Cooling Operation Fan Control................................................................... 39

3. Special Control..........................................................................................40

3.1 Startup Control ........................................................................................... 40

3.2 Oil Return Operation .................................................................................. 41

3.3 Defrosting Operation .................................................................................. 43

3.4 Pump-down Residual Operation ................................................................ 44

3.5 Restart Standby.......................................................................................... 45

3.6 Stopping Operation .................................................................................... 46