Preparing Electrical Wiring; Safety Device Requirements; Installation; Overview: Installation - Daikin RXYTQ8T7YF Installer And User Manual

6 Installation

a
b b b
a
b b b
a
a
b
b
a
a
a To indoor unit
b Oil collects to the outmost outdoor unit when the system
stops
X Not allowed
O Allowed
▪ If the piping length between the outdoor units exceeds 2 m, create
a rise of 200 mm or more in the gas line within a length of 2 m
from the kit.
If
≤2 m
a
>2 m
a
≤2 m
a To indoor unit
b Piping between outdoor units
NOTICE
There are restrictions on the refrigerant pipe connection
order between outdoor units during installation in case of a
multiple outdoor unit system. Install according to following
restrictions. The capacities of outdoor units A, B and C
must fulfill the following restriction conditions: A≥B≥C.
A B
a b c
a To indoor units
b Outdoor unit multi connecting piping kit (first branch)
c Outdoor unit multi connecting piping kit (second branch)
(1) Maximum length is 1000 m. If the total transmission wiring exceeds these limits, it may result in communication error.
Installer and user reference guide
16
a
b
a
Then
b
≤2 m
>2 m >2 m
b
≤2 m
C
5.4

Preparing electrical wiring

5.4.1

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
RXYTQ8
RXYTQ10
RXYTQ12
RXYTQ14
RXYTQ16
What? Case 1
Phase and frequency 3N~ 50 Hz
Voltage 380-415 V
Transmission line
(1)
section
For multi combinations
Calculate the recommended fuse capacity
Formula Calculate, by adding the minimum circuit amps of each
used unit (according to the table above), multiply the
result by 1.1 and select the next higher recommended
fuse capacity.
Example Combining the RXYTQ30 by using the RXYTQ8,
RXYTQ10, and RXYTQ12.
▪ Minimum circuit ampacity of the RXYTQ8=16.1 A
▪ Minimum circuit ampacity of the RXYTQ10=22.0 A
▪ Minimum circuit ampacity of the RXYTQ12=24.0 A
Accordingly, the minimum circuit ampacity of the
RXYTQ30=16.1+22.0+24.0=62.1 A
Multiplying the above result by 1.1 (62.1×1.1)=68.31 A,
so the recommended fuse capacity would be 80 A.
NOTICE
When using residual current operated circuit breakers, be
sure to use a high-speed type 300 mA rated residual
operating current.
6 Installation
6.1

Overview: Installation

This chapter describes what you have to do and know on-site to
install the system.
It contains information about:
▪ Opening the units
▪ Mounting the outdoor unit
▪ Connecting the refrigerant piping
▪ Checking the refrigerant piping
▪ Charging refrigerant
Minimum Recommended
circuit fuses
ampacity
16.1 A 20 A
22.0 A 25 A
24.0 A 32 A
27.0 A 32 A
31.0 A 40 A
Case 2
3N~ 60 Hz
400 V
2
0.75~1.25 mm
RXYTQ8~16T7YF
VRV IV system air conditioner
4P388989-1B – 2016.02