To Select Refrigerant Branch Kits; Preparing Electrical Wiring; Safety Device Requirements; Installation - Daikin RXYSQ5T8VB Installation And Operation Manual

5 Installation

E: Piping between BP unit and RA DX indoor unit
Indoor unit capacity Piping outer diameter size (mm)
index
Gas pipe
15~42
50
60
71
4.2.4

To select refrigerant branch kits

For piping example, refer to "4.2.3 To select the piping size" on
page 7.
Refnet joint at first branch (counting from outdoor unit)
When using refnet joints at the first branch counted from the outdoor
unit side, choose from the following table in accordance with the
capacity of the outdoor unit. Example: Refnet joint A→B‑1.
Outdoor unit capacity type
(HP)
4~6
Refnet joints at other branches
For refnet joints other than the first branch, select the proper branch
kit model based on the total capacity index of all indoor units
connected after the refrigerant branch. Example: Refnet joint
B‑1→C‑1.
Indoor unit capacity index
<182
Refnet headers
Concerning refnet headers, choose from the following table in
accordance with the total capacity of all the indoor units connected
below the refnet header.
Indoor unit capacity index
<182
INFORMATION
Maximum 8 branches can be connected to a header.
4.3

Preparing electrical wiring

4.3.1

Safety device requirements

The power supply must be protected with the required safety
devices, i.e. a main switch, a slow blow fuse on each phase and an
earth leakage protector in accordance with the applicable legislation.
Selection and sizing of the wiring should be done in accordance with
the applicable legislation based on the information mentioned in the
table below.
Model Minimum circuit
ampacity
RXYSQ4_V 29.1 A
RXYSQ5_V
RXYSQ6_V
RXYSQ4_Y 14.1 A
RXYSQ5_Y
RXYSQ6_Y
Transmission wiring
Transmission wiring
Installation and operation manual
8
Liquid pipe
9.5 6.4
12.7
9.5
15.9
Refrigerant branch kit
KHRQ22M20T
Refrigerant branch kit
KHRQ22M20T
Refrigerant branch kit
KHRQ22M29H
Recommended Power supply
fuses
32 A 1~ 50 Hz
220-240 V
16 A 3N~ 50 Hz
380-415 V
Vinyl cords with 0.75 to 1.25 mm²
sheath or cables (2‑core wires)
Maximum wiring length
(= distance between outdoor and
furthest indoor unit)
Total wiring length
(= distance between outdoor and
all indoors)
If the total transmission wiring exceeds these limits, it may
result in communication error.
5 Installation
5.1

Opening the units

5.1.1

To open the outdoor unit

DANGER: RISK OF ELECTROCUTION
DANGER: RISK OF BURNING
2
1×
5.2

Mounting the outdoor unit

5.2.1

To provide the installation structure

Prepare 4 sets of anchor bolts, nuts and washers (field supply) as
follows:
300 m
600 m
45°~90°
3
RXYSQ4~6T8V/YB
VRV IV-S system air conditioner
4P482275-1 – 2017.04