Daikin VRV IV+ - For the Installer

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For the installer

Installer and user reference guide

REYQ8~20+REMQ5U7Y1B

VRV IV+ heat recovery

4P561154-1A – 2020.10

For the installer

Main Page

Table of Contents2
About the Documentation6
About this Document6
Meaning of Warnings and Symbols6
General Safety Precautions8
For the Installer8
General8
Installation Site9
Refrigerant - in Case of R410A or R329
Electrical11
Specific Installer Safety Instructions14
For the User17
User Safety Instructions18
General18
Instructions for Safe Operation19
About the System22
System Layout22
User Interface24
Before Operation25
Operation26
Operation Range26
Operating the System26
About Operating the System26
About Cooling, Heating, Fan Only, and Automatic Operation27
About the Heating Operation27
To Operate the System (WITHOUT Cool/Heat Changeover Remote Control Switch)28
To Operate the System (with Cool/Heat Changeover Remote Control Switch)28
Using the Dry Program29
About the Dry Program29
To Use the Dry Program (WITHOUT Cool/Heat Changeover Remote Control Switch)29
To Use the Dry Program (with Cool/Heat Changeover Remote Control Switch)30
Adjusting the Air Flow Direction30
About the Air Flow Flap30
Setting the Master User Interface31
About Setting the Master User Interface31
To Designate the Master User Interface (VRV DX and Hydrobox)32
About Control Systems32
Energy Saving and Optimum Operation33
Available Main Operation Methods33
Available Comfort Settings34
Maintenance and Service35
Maintenance after a Long Stop Period35
Maintenance before a Long Stop Period36
About the Refrigerant36
After-Sales Service and Warranty36
Warranty Period36
Recommended Maintenance and Inspection37
Recommended Maintenance and Inspection Cycles37
Shortened Maintenance and Replacement Cycles38
Troubleshooting39
Error Codes: Overview40
Symptoms that Are NOT System Malfunctions43
Symptom: the System Does Not Operate43
Symptom: Cool/Heat Cannot be Changed over43
Symptom: Fan Operation Is Possible, but Cooling and Heating Do Not Work43
Symptom: the Fan Speed Does Not Correspond to the Setting43
Symptom: the Fan Direction Does Not Correspond to the Setting43
Symptom: White Mist Comes out of a Unit (Indoor Unit)44
Symptom: White Mist Comes out of a Unit (Indoor Unit, Outdoor Unit)44
Symptom: the User Interface Reads "U4" or "U5" and Stops, but then Restarts after a few Minutes44
Symptom: Noise of Air Conditioners (Indoor Unit)44
Symptom: Noise of Air Conditioners (Indoor Unit, Outdoor Unit)44
Symptom: Noise of Air Conditioners (Outdoor Unit)44
Symptom: Dust Comes out of the Unit45
Symptom: the Units Can Give off Odours45
Symptom: the Outdoor Unit Fan Does Not Spin45
Symptom: the Display Shows "8845
Symptom: the Compressor in the Outdoor Unit Does Not Stop after a Short Heating Operation45
Symptom: the Inside of an Outdoor Unit Is Warm Even When the Unit Has Stopped45
Symptom: Hot Air Can be Felt When the Indoor Unit Is Stopped45
Relocation46
Disposal47
Technical Data48
Information Requirements for Eco Design48
For the Installer49
About the Box50
About LOOP by DAIKIN50
Overview: about the Box50
To Unpack the Outdoor Unit51
To Remove the Accessories from the Outdoor Unit52
Accessory Pipes: Diameters52
To Remove the Transportation Stay (Only for 14+16 HP)53
To Remove the Transportation Stay (Only for 18+20 HP)54
About the Units and Options55
Overview: about the Units and Options55
Identification Label: Outdoor Unit55
About the Outdoor Unit56
System Layout56
Combining Units and Options57
About Combining Units and Options57
Possible Combinations of Indoor Units58
Possible Combinations of Outdoor Units58
Possible Options for the Outdoor Unit59
Unit Installation61
Preparing the Installation Site61
Installation Site Requirements of the Outdoor Unit61
Additional Installation Site Requirements of the Outdoor Unit in Cold Climates63
Securing Safety against Refrigerant Leaks64
Opening the Unit66
About Opening the Units66
To Open the Outdoor Unit66
To Open the Electrical Component Box of the Outdoor Unit67
Mounting the Outdoor Unit68
To Provide the Installation Structure68
Piping Installation70
Preparing Refrigerant Piping70
Refrigerant Piping Requirements70
Refrigerant Piping Insulation71
To Select the Piping Size71
To Select Refrigerant Branch Kits74
About the Piping Length75
Single Outdoor Units and Standard Multi-Outdoor-Unit Combinations >20 HP76
Standard Multi-Outdoor-Unit Combinations ≤20 HP and Free Multi-Outdoor-Unit Combinations79
Multiple Outdoor Units: Possible Layouts81
Connecting the Refrigerant Piping83
About Connecting the Refrigerant Piping83
Precautions When Connecting the Refrigerant Piping83
Multiple Outdoor Units: Knockout Holes84
To Route the Refrigerant Piping84
To Connect the Refrigerant Piping to the Outdoor Unit85
To Connect the Multi Connection Piping Kit86
To Connect the Refrigerant Branching Kit86
To Protect against Contamination87
To Braze the Pipe End88
Using the Stop Valve and Service Port88
To Remove the Spun Pipes91
Checking the Refrigerant Piping92
About Checking the Refrigerant Piping92
Checking Refrigerant Piping: General Guidelines93
Checking Refrigerant Piping: Setup94
To Perform a Leak Test94
To Perform Vacuum Drying95
To Insulate the Refrigerant Piping95
Charging Refrigerant96
Precautions When Charging Refrigerant96
About Charging Refrigerant97
To Determine the Additional Refrigerant Amount98
To Charge Refrigerant: Flow Chart100
To Charge Refrigerant102
Step 6A: to Automatically Charge Refrigerant104
Step 6B: to Manually Charge Refrigerant106
Error Codes When Charging Refrigerant107
Checks after Charging Refrigerant107
To Fix the Fluorinated Greenhouse Gases Label108
Electrical Installation109
About Connecting the Electrical Wiring109
Precautions When Connecting the Electrical Wiring109
Field Wiring: Overview111
About the Electrical Wiring111
Guidelines When Knocking out Knockout Holes112
About Electrical Compliance113
Safety Device Requirements114
To Route and Fix the Transmission Wiring116
To Connect the Transmission Wiring117
To Finish the Transmission Wiring118
To Route and Fix the Power Supply118
To Connect the Power Supply119
To Check the Insulation Resistance of the Compressor120
Configuration122
Overview: Configuration122
Making Field Settings122
About Making Field Settings122
Field Setting Components123
To Access the Field Setting Components124
To Access Mode 1 or 2124
To Use Mode 1125
To Use Mode 2126
Mode 1: Monitoring Settings127
Mode 2: Field Settings129
To Connect the PC Configurator to the Outdoor Unit137
Energy Saving and Optimum Operation137
Available Main Operation Methods137
Available Comfort Settings138
Example: Automatic Mode During Cooling141
Example: Automatic Mode During Heating142
Using the Leak Detection Function143
About Automatic Leak Detection143
To Manually Perform a Leak Detection143
Commissioning145
Overview: Commissioning145
Precautions When Commissioning145
Checklist before Commissioning146
About the Test Run147
To Perform a Test Run148
Correcting after Abnormal Completion of the Test Run149
Operating the Unit149
Hand-Over to the User150
Maintenance and Service151
Maintenance Safety Precautions151
To Prevent Electrical Hazards151
About Service Mode Operation152
To Use Vacuum Mode152
To Recover Refrigerant152
Troubleshooting154
Solving Problems Based on Error Codes154
Error Codes: Overview154
Disposal161
Technical Data162
Service Space: Outdoor Unit162
Piping Diagram: Outdoor Unit164
Wiring Diagram: Outdoor Unit166
Glossary172

Daikin VRV IV+ - For the Installer

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