Daikin VRV IV RYYQ10T7Y1B Series - 5 Installation; b Piping between outdoor units; 4.3 Preparing electrical wiring; 4.3.1 Safety device requirements

5 Installation
Installation and operation manual
11
RYYQ+RYMQ+RXYQ8~20T7Y1B
VRV IV system air conditioner
4P370473-1C – 2016.07
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 C
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)
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.
For standard combinations
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
Recommended
fuses
RYYQ8/RYMQ8/RXYQ8 16.1A 20A
RYYQ10/RYMQ10/RXYQ10 22.0A 25A
RYYQ12/RYMQ12/RXYQ12 24.0A 32A
RYYQ14/RYMQ14/RXYQ14 27.0A 32A
RYYQ16/RYMQ16/RXYQ16 31.0A 40A
RYYQ18/RYMQ18/RXYQ18 35.0A 40A
RYYQ20/RYMQ20/RXYQ20 39.0A 50A
For all models:
▪ Phase and frequency: 3N~50Hz
▪ Voltage: 380-415V
▪ Transmission line section: 0.75~1.25 mm
2
, maximum length is
1000 m. If the total transmission wiring exceeds these limits, it
may result in communication error.
For non-standard 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 RXYQ30 by using the RXYQ8,
RXYQ10, and RXYQ12.
▪ Minimum circuit ampacity of the RXYQ8=16.1A
▪ Minimum circuit ampacity of the RXYQ10=22.0A
▪ Minimum circuit ampacity of the RXYQ12=24.0A
Accordingly, the minimum circuit ampacity of the
RXYQ30=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.
5 Installation
5.1 Opening the units
5.1.1 To open the outdoor unit
DANGER: RISK OF ELECTROCUTION
DANGER: RISK OF BURNING
To gain access to the unit, front plates need to be opened as follows:
14×14×
8~12 HP 14~20 HP
Once the front plates open, the electrical component box can be
accessed. See "5.1.2 To open the electrical component box of the
outdoor unit"on page11.
For service purposes, the push buttons on the main PCB need to be
accessed. To access these push buttons, the electrical component
box cover does not need to be opened. See "6.1.3 To access the
field setting components"on page26.
5.1.2 To open the electrical component box of
the outdoor unit
NOTICE
Do not apply excessive force when opening the electronic
component box cover. Excessive force can deform the
cover, resulting in entering of water to cause equipment
failure.