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17.2
Specifications of standard wiring components
For standard combinations
Component
Power supply cable
MCA
Voltage
Phase
Frequency
Wire size
Interconnection cable
Voltage
Wire size
Recommended field fuse
Earth leakage circuit breaker/ residual current
circuit breaker
(a)
MCA=Minimum circuit ampacity. Stated values are maximum values.
Component
Power supply cable
MCA
Wire size
Recommended field fuse
(a)
MCA=Minimum circuit ampacity. Stated values are maximum values.
Please use the tables above to specify the requirements for the
power supply wiring.
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 RXYA20 by using two RXYA10 units.
▪ Minimum circuit ampacity of the RXYA10=22.0 A
Accordingly, the minimum circuit ampacity of the
RXYA20=22.0+22.0=44.0 A
Multiply the above result by 1.1: (44.0 A×1.1)=48.4 A,
so the recommended fuse capacity would be 50 A.
NOTICE
When using residual current operated circuit breakers, be
sure to use a high-speed type 300 mA rated residual
operating current.
NOTICE
We recommend using solid (single-core) wires. If stranded
wires are used, slightly twist the strands to consolidate the
end of the conductor for either direct use in the terminal
clamp or insertion in a round crimp-style terminal. Details
are described in "Guidelines when connecting the electrical
wiring" in the installer reference guide.
RYMA5+RXYA8~20A7Y1B
VRV 5 heat pump
4P739915-1 – 2023.12
RYMA5
(a)
15 A
2.5 mm²
Only use harmonised wire providing double insulation and suitable for applicable voltage.
20 A
RXYA10
(a)
30 A
Single outdoor units
RXYA8
RXYA10
RXYA12
16.1 A
22 A
24 A
380-415 V
3N~
50 Hz
5 core cable
Must comply with national wiring regulation.
Wire size based on the current, but not less than:
4 mm²
220-240 V
2-core cable
0.75-1.5 mm²
25 A
32 A
Must comply with national wiring regulation.
Multi outdoor units
RXYA13
RXYA16
31.1 A
32.2 A
5 core cable
Must comply with national wiring regulation.
Wire size based on the current, but not less than:
6 mm²
40 A
17.3
Connecting the electrical wiring
Use the following methods for installing wires:
Wire type
Single-core wire
Or
Stranded conductor
wire twisted to "solid-
like" connection
Stranded conductor
wire with round crimp-
style terminal
17 Electrical installation
RXYA14
RXYA16
RXYA18
27 A
31 A
35 A
6 mm²
32 A
40 A
RXYA18
RXYA20
38.1 A
10 mm²
50 A
Installation method
c b
A
A´
c
a
a Curled wire (single-core or twisted
stranded conductor wire)
b Screw
c Flat washer
c b
a
B
B
a
a Terminal
b Screw
c Flat washer
Allowed
NOT allowed
Installation and operation manual
RXYA20
42 A
10 mm²
50 A
40.1 A
AA´
a
b
c
41
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