Daikin VRV IV Q+ Series Installer And User Reference Manual page 109

RXYQQ8~20U7Y1B
VRV IV Q+ series heat pump
4P546229-1A – 2020.10
NOTICE
▪
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 wrapped and routed together
with the field piping.
Field piping can be routed from front or bottom of the unit (going left or right).
Refer to "To route the refrigerant
▪ Be sure to follow the limits below. If the unit-to-unit cables are beyond these
limits, it may result in malfunction of transmission:
- Maximum wiring length: 1000 m.
- Total wiring length: 2000 m.
- Maximum inter unit wiring length between outdoor units: 30 m.
- Transmission wiring to cool/heat selector: 500 m.
- Maximum number of branches: 16.
▪ Maximum number of independent interconnectable systems: 10.
▪ Up to 16 branches are possible for unit-to-unit cabling. No branching is allowed
after branching (see figure below).
a a
B
A
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 to 1.25 mm
(2-core wires). (3-core wire cables are allowable for the cooler/heater changeover
user interface only.)
19
4
piping" [ 82].
a
h
d
b
e
b
g
b
f
b
g
b
c
b
Electrical installation
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2
sheath or cables
Installer and user reference guide
109