19
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Electrical installation
Installer and user reference guide
107
RWEYQ8~14T9Y1B
VRV IV water-cooled system air conditioner
4P452191-1B – 2020.10
In case of heat recovery system
b
b
b
b
b
b
e
f
g
g
d
c
a
a
a
A
B
h
a
Outdoor unit
b
Indoor unit
c
Main line
d
Branch line 1
e
Branch line 2
f
Branch line 3
g
No branch is allowed after branch
h
Central user interface (etc...)
A
Outdoor/indoor transmission wiring
B
Master/slave transmission wiring
For the above wiring, always use vinyl cords with 0.75 mm² to 1.25 mm² sheath or
cables (2-core wires). 3-core wire cables are only allowable for the cooler/heater
changeover user interface.
19.1.4 About electrical compliance
This equipment complies with:
▪
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.
Model
Minimum S
sc
value
RWEYQ8~14T9
1780 kVA
Because of the free multi combination, it is the responsibility of the installer to
calculate the minimum S
sc
value for the multi combination. The value is calculated
by adding up the values of the corresponding units used in the multi combination.
RWEYQ28T9=2× RWRWEYQ8T9.
