About The Electrical Wiring - Daikin VRV W T-Series Installation Manual

In case of heat pump mode
3
4
1
6
2
9
3
4
8
5
1 Field power supply
2 Main switch
3 Ground leak detector
4
Fuse or circuit breaker
5 Remote controller
6 Outside unit
7 Branch selector unit
8 Indoor unit
9 Cool/heat selector
Power supply wiring
Transmission wiring
These images are intended as examples only. Please follow local
and national electrical code.
5 .8 .3

About the electrical wiring

It is important to keep the power supply and the transmission wiring
separated from each other. In order to avoid any electrical
interference the distance between both wiring should always be at
least 1 inch (25.4 mm).
NOTE
▪ Be sure to keep the power line and transmission line
apart from each other. Transmission wiring and power
supply wiring may cross, but may not run parallel.
▪ Transmission wiring and power supply wiring may not
touch internal piping (except the inverter PCB cooling
pipe) in order to avoid wire damage due to high
temperature piping.
▪ Firmly close the lid and arrange the electrical wires so
as to prevent the lid or other parts from coming loose.
The transmission wiring outside the unit should be routed in conduit.
Be sure to follow the limits below. If the unit-to-unit cables are
beyond these limits, it may result in malfunction of transmission:
Description
Maximum wiring length
Total wiring length
Maximum inter unit wiring length between
outside units
Transmission wiring to cool/heat selector
Maximum number of branches for unit-to-
unit cabling
(a)
Maximum number of independent
interconnectable systems
(a) No branching is allowed after branching (see figure below).
RWEQ96~432TAYCU
VRV W T-Series water-cooled system air conditioner
4P540122-1B – 2018.11
In case of heat recovery mode
A
In case of heat pump mode
A
Limitation
3280 ft (1000 m)
6560 ft (2000 m)
98 ft (30 m)
1640 ft (500 m)
16
For the above wiring, always use vinyl cords with AWG18 to AWG16
sheath or cables (2-core wires). 3-core wire cables are only
10
allowable for the cooler/heater changeover user interface.
h
B
a a a
b
b
a
Outside unit
b Indoor unit + Branch selector units
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 Outside/indoor transmission wiring
B
Main/sub transmission wiring
B
a a a
b
b
a
Outside 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 Outside/indoor transmission wiring
B Main/sub transmission wiring
5 Installation
d
b
e
b
g
b
f
g
b
c
h
d
b
e
b
g
b
f
g
b
c
Installation manual
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