Daikin VRV system FXMQ250AXVMB - Page 55

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17 | Piping installation

Installer and user reference guide

FXMQ-A

VRV system air conditioner

4P701548-1 – 2022.07

f Unit

NOTICE

Make sure to insulate all refrigerant piping. Any exposed piping might cause

condensation.

Main Page

Table of Contents2
About the Documentation4
About this Document4
Meaning of Warnings and Symbols4
General Safety Precautions6
For the Installer6
General6
Installation Site7
Refrigerant - in Case of R410A or R327
Electrical9
Specific Installer Safety Instructions11
For the User13
User Safety Instructions14
General14
Instructions for Safe Operation15
About the System19
System Layout19
Information Requirements for Fan Coil Units20
User Interface21
Before Operation22
Operation23
Operation Range23
About Operation Modes23
Basic Operation Modes23
Special Heating Operation Modes24
To Operate the System24
Energy Saving and Optimum Operation25
Maintenance and Service26
Precautions for Maintenance and Service26
Cleaning the Air Filter and Air Outlet27
To Clean the Air Filter27
To Clean the Air Outlet27
Maintenance before a Long Stop Period28
Maintenance after a Long Stop Period28
About the Refrigerant28
Troubleshooting30
Symptoms that Are NOT System Malfunctions31
Symptom: the System Does Not Operate31
Symptom: White Mist Comes out of a Unit (Indoor Unit)32
Symptom: White Mist Comes out of a Unit (Indoor Unit, Outdoor Unit)32
Symptom: the User Interface Reads "U4" or "U5" and Stops, but then Restarts after a few Minutes32
Symptom: Noise of Air Conditioners (Indoor Unit)32
Symptom: Noise of Air Conditioners (Indoor Unit, Outdoor Unit)32
Symptom: Dust Comes out of the Unit32
Symptom: the Units Can Give off Odours32
Relocation33
Disposal34
For the Installer35
About the Box36
Indoor Unit36
To Unpack and Handle the Unit36
To Remove the Accessories from the Indoor Unit36
About the Units and Options38
Identification38
Identification Label: Indoor Unit38
About the Indoor Unit38
System Layout38
Combining Units and Options39
Possible Options for the Indoor Unit39
Unit Installation40
Preparing the Installation Site40
Installation Site Requirements of the Indoor Unit40
Mounting the Indoor Unit42
Guidelines When Installing the Indoor Unit42
Guidelines When Installing the Ducting44
Guidelines When Installing the Drain Piping45
Piping Installation49
Preparing Refrigerant Piping49
Refrigerant Piping Requirements49
Refrigerant Piping Insulation50
Connecting the Refrigerant Piping50
About Connecting the Refrigerant Piping50
Precautions When Connecting the Refrigerant Piping51
Guidelines When Connecting the Liquid Piping52
Guidelines When Connecting the Gas Piping53
To Connect the Refrigerant Piping to the Indoor Unit54
Electrical Installation56
About Connecting the Electrical Wiring56
Precautions When Connecting the Electrical Wiring56
Guidelines When Connecting the Electrical Wiring57
Specifications of Standard Wiring Components58
To Connect the Electrical Wiring to the Indoor Unit59
Commissioning62
Overview: Commissioning62
Precautions When Commissioning62
Checklist before Commissioning63
To Perform a Test Run64
Configuration65
Field Setting65
Hand-Over to the User70
Troubleshooting71
Solving Problems Based on Error Codes71
Error Codes: Overview71
Disposal72
Technical Data73
Wiring Diagram73
Unified Wiring Diagram Legend73
Glossary76

Daikin VRV system FXMQ250AXVMB - Page 55

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