Installation; Overview: Installation; Opening The Units; To Open The Outdoor Unit - Daikin VRV IV+ RYYQ12U7Y1B Series Installer And User Manual

6 Installation

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.
INFORMATION
Multi units are standard combinations.
Model
RYYQ8/RYMQ8/RXYQ8
RYYQ10/RYMQ10/RXYQ10
RYYQ12/RYMQ12/RXYQ12
RYYQ14/RYMQ14/RXYQ14
RYYQ16/RYMQ16/RXYQ16
RYYQ18/RYMQ18/RXYQ18
RYYQ20/RYMQ20/RXYQ20
RYYQ22/RXYQ22
RYYQ24/RXYQ24
RYYQ26/RXYQ26
RYYQ28/RXYQ28
RYYQ30/RXYQ30
RYYQ32/RXYQ32
RYYQ34/RXYQ34
RYYQ36/RXYQ36
RYYQ38/RXYQ38
RYYQ40/RXYQ40
RYYQ42/RXYQ42
RYYQ44/RXYQ44
RYYQ46/RXYQ46
RYYQ48/RXYQ48
RYYQ50/RXYQ50
RYYQ52/RXYQ52
RYYQ54/RXYQ54
For all models:
▪ Phase and frequency: 3N~ 50 Hz
▪ Voltage: 380~415 V
▪ Transmission line section: 0.75~1.25 mm
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
Multiply the above result by 1.1 ⇒ (62.1 A×1.1)=68.3 A,
so the recommended fuse capacity would be 80 A.
Installer and user reference guide
20
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
35.0 A 40 A
39.0 A 50 A
46.0 A 63 A
46.0 A 63 A
51.0 A 63 A
55.0 A 63 A
59.0 A 80 A
62.0 A 80 A
66.0 A 80 A
70.0 A 80 A
76.0 A 100 A
81.0 A 100 A
84.0 A 100 A
86.0 A 100 A
89.0 A 100 A
93.0 A 125 A
97.0 A 125 A
101.0 A 125 A
105.0 A 125 A
2
, maximum length is
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.
Typical workflow
Installation typically consists of the following stages:
1

Opening the units

2 Mounting the outdoor unit
3 Connecting the refrigerant piping
4 Checking the refrigerant piping
5 Insulating the refrigerant piping
6 Charging refrigerant
7 Connecting the electrical wiring
6.2 Opening the units
6.2.1

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:
8~12 HP 14~20 HP
14× 14×
Once the front plates open, the electrical component box can be
accessed. See "6.2.2 To open the electrical component box of the
outdoor unit" on page 20.
For service purposes, the pushbuttons on the main PCB need to be
accessed. To access these pushbuttons, the electrical component
box cover does not need to be opened. See
field setting components" on page 38.
6.2.2 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.
"7.2.3 To access the
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ heat pump
4P546228-1 – 2018.09