15 Electrical Installation; About Electrical Compliance; Safety Device Requirements; Field Wiring: Overview - Daikin VRV IV-S RXYSQ4T8VB Series Installation And Operation Manual

15 Electrical installation

c Additional refrigerant amount charged
d Total refrigerant charge
e Quantity of fluorinated greenhouse gases of the total
refrigerant charge expressed as tonnes CO
f GWP = Global warming potential
NOTICE
Applicable legislation on fluorinated greenhouse gases
requires that the refrigerant charge of the unit is indicated
both in weight and CO
2
Formula to calculate the quantity in CO
tonnes: GWP value of the refrigerant × total refrigerant
charge [in kg] / 1000
Use the GWP value mentioned on the refrigerant charge
label.
2 Fix the label on the inside of the outdoor unit near the gas and
liquid stop valves.
15 Electrical installation
DANGER: RISK OF ELECTROCUTION
WARNING
ALWAYS use multicore cable for power supply cables.
15.1

About electrical compliance

Only for RXYSQ4~6_V
Equipment complying with
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.).
15.2

Safety device requirements

Power supply wiring
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.
Selection and sizing of the wiring should be done in accordance with
the applicable legislation based on the information mentioned in the
table below.
Model Minimum circuit
ampacity
RXYSQ4_V 29.1 A
RXYSQ5_V
RXYSQ6_V
RXYSQ4_Y 14.1 A
RXYSQ5_Y
RXYSQ6_Y
Transmission wiring
Transmission wiring specification and limits
Vinyl cords with 0.75 to 1.25 mm² sheath or cables (2‑core wires)
Maximum number of branches for unit-to-unit
cabling
Maximum wiring length
(distance between outdoor and furthest indoor unit)
Total wiring length
(sum of distances between outdoor and all indoor
units)
Installation and operation manual
26
equivalent.
2
equivalent.
equivalent
2
EN/IEC 61000‑3‑12 (European/
Recommended Power supply
fuses
32 A 1~ 50 Hz
220-240 V
16 A 3N~ 50 Hz
380-415 V
(a)
9
300 m
600 m
(a)
If the total transmission wiring exceeds these limits,
communication errors might occur.
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.
Example:
220-240 V 380-415 V
1~ 50 Hz 3N~ 50 Hz
a b
c
V Y
F1/F2
F1/F2
a Main switch
b Earth connection
c Power supply wiring (including earth) (shielded cable)
F1/F2 Transmission wiring (shielded cable)
V Outdoor unit (RXYSQ4~6_V)
Y Outdoor unit (RXYSQ4~6_Y)
d Indoor unit
e User interface
15.4 To connect the electrical wiring to
the outdoor unit
NOTICE
▪ Follow the wiring diagram (delivered with the unit,
located at the inside of the service cover).
▪ Make sure the electrical wiring does NOT obstruct
proper reattachment of the service cover.
1 Remove the service cover.
2 Connect the transmission wiring as follows:
X2M
TO IN/D TO OUT/D
F1 F2
a
b
F1 F2
a Use the conductor of sheathed wire (2 wire) (no polarity)
b Terminal board (field supply)
220-240 V
1~ 50 Hz
(16 V)
d
(16 V)
e
F1 F2 F1 F2
F1 F2 F1 F2
RXYSQ4~6T8V/YB(*)
VRV IV-S system air conditioner
4P482275-1B – 2020.10