To Connect The Refrigerant Branching Kit; Checking The Refrigerant Piping; About Checking The Refrigerant Piping - Daikin RXYSQ6T7Y1B9 Installer's Manual

Possibility 1: To the front
A
c
f e1 e d
Possibility 3: To the side
d e1 e f
A
c1
c
c, c1 Gas piping accessory 1 + copper gasket (always use it)
d Gas piping accessory 2
e, e1 Gas piping accessory 3 (cut it to the required length)
f Field supply
5 Reattach the service cover and the piping intake plate.
6 Seal all gaps (example: a) to prevent snow and small animals
from entering the system.
a
WARNING
Provide adequate measures to prevent that the unit can be
used as a shelter by small animals. Small animals that
make contact with electrical parts can cause malfunctions,
smoke or fire.
NOTICE
Make sure to open the stop valves after installing the
refrigerant piping and performing vacuum drying. Running
the system with the stop valves closed may break the
compressor.
RXYSQ6T7Y1B9
VRV IV-S system air conditioner
4P404677-1A – 2016.03
Possibility 2: To the back
A
c
d e
Possibility 4: Downwards
A
A
c
c
e
e1
f
6.4.9

To connect the refrigerant branching kit

For installation of the refrigerant branching kit, refer to the installation
manual delivered with the kit.
▪ Mount the refnet joint so that it branches either horizontally or
vertically.
▪ Mount the refnet header so that it branches horizontally.
b
f
A
B
a Horizontal surface
b Refnet joint mounted vertically
c Refnet joint mounted horizontally
6.5

Checking the refrigerant piping

6.5.1

About checking the refrigerant piping

Refrigerant piping works are
finished?
Yes
The indoor units and/or
outdoor unit were already
powered ON?
Yes
Use procedure:
"Method 2: After power ON".
It is very important that all refrigerant piping work is done before the
units (outdoor or indoor) are powered on.
When the units are powered on, the expansion valves will initialise.
This means that they will close. Leak test and vacuum drying of field
piping and indoor units is impossible when this happens.
Therefore, there will be explained 2 methods for initial installation,
leak test and vacuum drying.
Method 1: Before power ON
If the system has not yet been powered on, no special action is
required to perform the leak test and the vacuum drying.
Method 2: After power ON
If the system has already been powered on, activate setting [2‑21]
(refer to "7.2.4 To access mode 1 or 2" on page
will open field expansion valves to guarantee a R410A piping
pathway and make it possible to perform the leak test and the
vacuum drying.
6 Installation
c
a
a
Finish piping work.
No
Use procedure:
"Method 1: Before power ON
No
(regular method)".
28). This setting
Installer and user reference guide
19