6 Installation
Installer and user reference guide
20
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ heat pump
4P546228-1 – 2018.09
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
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
RYYQ22/RXYQ22
46.0 A
63 A
RYYQ24/RXYQ24
46.0 A
63 A
RYYQ26/RXYQ26
51.0 A
63 A
RYYQ28/RXYQ28
55.0 A
63 A
RYYQ30/RXYQ30
59.0 A
80 A
RYYQ32/RXYQ32
62.0 A
80 A
RYYQ34/RXYQ34
66.0 A
80 A
RYYQ36/RXYQ36
70.0 A
80 A
RYYQ38/RXYQ38
76.0 A
100 A
RYYQ40/RXYQ40
81.0 A
100 A
RYYQ42/RXYQ42
84.0 A
100 A
RYYQ44/RXYQ44
86.0 A
100 A
RYYQ46/RXYQ46
89.0 A
100 A
RYYQ48/RXYQ48
93.0 A
125 A
RYYQ50/RXYQ50
97.0 A
125 A
RYYQ52/RXYQ52
101.0 A
125 A
RYYQ54/RXYQ54
105.0 A
125 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
Multiply the above result by 1.1
⇒
(62.1 A×1.1)=68.3 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.
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:
14×
14×
8~12 HP
14~20 HP
Once the front plates open, the electrical component box can be
accessed. See
"6.2.2 To open the electrical component box of the
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.
