Safety Device Requirements; Field Wiring: Overview - Daikin VRV IV+ REYQ8U7Y1B Installation And Operation Manual

15 Electrical installation
▪ EN/IEC 61000‑3‑11 provided that the system impedance Z
less than or equal to Z at the interface point between the user's
max
supply and the public system.
▪ EN/IEC 61000‑3‑11 =
Standard setting the limits for voltage changes, voltage
fluctuations and flicker in public low-voltage supply systems for
equipment with rated current ≤75 A.
▪ It is the responsibility of the installer or user of the equipment to
ensure, by consultation with the distribution network operator if
necessary, that the equipment is connected only to a supply
with a system impedance Z
▪ EN/IEC 61000‑3‑12 provided that the short-circuit power S
greater than or equal to the minimum S
point between the user's supply and the public system.
▪ EN/IEC 61000‑3‑12 =
Standard setting the limits for harmonic currents produced by
equipment connected to public low-voltage systems with input
current >16 A and ≤75 A per phase.
▪ It is the responsibility of the installer or user of the equipment to
ensure, by consultation with the distribution network operator if
necessary, that the equipment is connected only to a supply
with a short-circuit power S
minimum S value.
sc
Single outdoor unit
Model
REMQ5
REYQ8
REYQ10
REYQ12
REYQ14
REYQ16
REYQ18
REYQ20
Multiple outdoor units
Model
REYQ10
REYQ13
REYQ16
REYQ18
REYQ20
REYQ22
REYQ24
REYQ26
REYQ28
REYQ30
REYQ32
REYQ34
REYQ36
REYQ38
REYQ40
REYQ42
REYQ44
REYQ46
REYQ48
REYQ50
REYQ52
REYQ54
Installation and operation manual
32
European/International Technical
less than or equal to Z .
sys max
value at the interface
sc
European/International Technical
greater than or equal to the
sc
Z (Ω) Minimum S
max
value (kVA)
— 2893
— 2893
— 3954
— 4313
— 4852
— 5391
— 6289
— 7009
Z (Ω) Minimum S
max
value (kVA)
— 5786
— 5786
— 5786
— 6846
— 7206
— 8266
— 8284
— 9165
— 9704
— 10602
— 10781
— 11680
— 12399
— 13495
— 14556
— 14735
— 15094
— 15634
— 16172
— 17071
— 17969
— 18868
is
INFORMATION
sys
Multi units are standard combinations.
15.2

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
is
sc
table below.
Model
REMQ5
REYQ8
REYQ10
REYQ12
REYQ14
REYQ16
REYQ18
sc
REYQ20
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
sc
result by 1.1 and select the next higher recommended
fuse capacity.
Example Combining the REYQ30 by using the REYQ8,
REYQ10, and REYQ12.
▪ Minimum circuit ampacity of the REYQ8=16.1 A
▪ Minimum circuit ampacity of the REYQ10=22.0 A
▪ Minimum circuit ampacity of the REYQ12=24.0 A
Accordingly, the minimum circuit ampacity of the
REYQ30=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.
15.3

Field wiring: Overview

Field wiring consists of:
▪ power supply (including earth),
▪ DIII transmission wiring between communication box and outdoor
unit,
▪ RS‑485 transmission wiring between communication box and
monitoring system.
Single outdoor unit
Minimum Recommended
circuit
ampacity
16.1 A
16.1 A
22.0 A
24.0 A
27.0 A
31.0 A
35.0 A
39.0 A
2
, maximum length is
REYQ8~20+REMQ5U7Y1B
VRV IV+ heat recovery
4P546222-1B – 2020.10
fuses
20 A
20 A
25 A
32 A
32 A
40 A
40 A
50 A