Daikin REYQ8U7Y1B, Installation And Operation Manual

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15 Electrical installation
Installation and operation manual
32
REYQ8~20+REMQ5U7Y1B
VRV IV+ heat recovery
4P546222-1B – 2020.10
▪ EN/IEC 61000‑3‑11 provided that the system impedance Z
sys
is
less than or equal to Z
max
at the interface point between the user's
supply and the public system.
▪ EN/IEC 61000‑3‑11 = European/International Technical
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
sys
less than or equal to Z
max
.
▪ EN/IEC 61000‑3‑12 provided that the short-circuit power S
sc
is
greater than or equal to the minimum S
sc
value at the interface
point between the user's supply and the public system.
▪ EN/IEC 61000‑3‑12 = European/International Technical
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
sc
greater than or equal to the
minimum S
sc
value.
Single outdoor unit
Model Z
max
(Ω) Minimum S
sc
value (kVA)
REMQ5 — 2893
REYQ8 — 2893
REYQ10 — 3954
REYQ12 — 4313
REYQ14 — 4852
REYQ16 — 5391
REYQ18 — 6289
REYQ20 — 7009
Multiple outdoor units
Model Z
max
(Ω) Minimum S
sc
value (kVA)
REYQ10 — 5786
REYQ13 — 5786
REYQ16 — 5786
REYQ18 — 6846
REYQ20 — 7206
REYQ22 — 8266
REYQ24 — 8284
REYQ26 — 9165
REYQ28 — 9704
REYQ30 — 10602
REYQ32 — 10781
REYQ34 — 11680
REYQ36 — 12399
REYQ38 — 13495
REYQ40 — 14556
REYQ42 — 14735
REYQ44 — 15094
REYQ46 — 15634
REYQ48 — 16172
REYQ50 — 17071
REYQ52 — 17969
REYQ54 — 18868
INFORMATION
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
table below.
Single outdoor unit
Model Minimum
circuit
ampacity
Recommended
fuses
REMQ5 16.1 A 20 A
REYQ8 16.1 A 20 A
REYQ10 22.0 A 25 A
REYQ12 24.0 A 32 A
REYQ14 27.0 A 32 A
REYQ16 31.0 A 40 A
REYQ18 35.0 A 40 A
REYQ20 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 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.