To Finish The Transmission Wiring; To Route And Fix The Power Supply; To Connect The Power Supply - Daikin VRV IV+ RYYQ12U7Y1B Series Installer And User Manual

6 Installation
In case of multi outdoor unit installation
a b
A1P
F1 F2 F1 F2 Q1 Q2 Q1 Q2
f
e d
a Unit A (master outdoor unit)
b Unit B (slave outdoor unit)
c Unit C (slave outdoor unit)
d Master/slave transmission (Q1/Q2)
e Outdoor/indoor transmission (F1/F2)
f Outdoor unit/other system transmission (F1/F2)
INFORMATION
U-series units cannot share the same refrigerant circuit
with T-series units. However, electrically , U-series units
and T-series units can be connected via F1/F2.
▪ The interconnecting wiring between the outdoor units in the same
piping system must be connected to the Q1/Q2 (Out Multi)
terminals. Connecting the wires to the F1/F2 terminals results in
system malfunction.
▪ The wiring for the other systems must be connected to the F1/F2
(Out-Out) terminals of the PCB in the outdoor unit to which the
interconnecting wiring for the indoor units is connected.
▪ The base unit is the outdoor unit to which the interconnecting
wiring for the indoor units is connected.
6.8.7

To finish the transmission wiring

After installing the transmission wires inside the unit, wrap them
along with the on-site refrigerant pipes using finishing tape, as
shown in figure below.
a c b e d
a Liquid pipe
b Gas pipe
c Insulator
d Transmission wiring (F1/F2)
e Finishing tape
6.8.8

To route and fix the power supply

NOTICE
When routing earth wires, secure clearance of 25 mm or
more away from compressor lead wires. Failure to observe
this instruction properly may adversely affect correct
operation of other units connected to the same earth.
The power supply wiring can be routed from the front and left side.
Fix it to the lower mounting hole.
Installer and user reference guide
36
c
Q1 Q2
d
8~12 HP
X1M
A
c b a
A
a Power supply (possibility 1)
b Power supply (possibility 2)
c Power supply (possibility 3)
d Tie wrap
(a) Knockout hole has to be removed. Close the hole to avoid
small animals or dirt from entering.
6.8.9

To connect the power supply

NOTICE
Never connect the power supply to transmission wiring
terminal block. Otherwise the entire system may break
down.
INFORMATION
Installation and routing in case the cool/heat selector is
used: refer to the installation manual of the cool/heat
selector.
CAUTION
When connecting the power supply, the earth connection
must be made before the current-carrying connections are
established. When disconnecting the power supply, the
current-carrying connections must be separated before the
earth connection is. The length of the conductors between
the power supply stress relief and the terminal block itself
must be as such that the current-carrying wires are
tautened before the earth wire is in case the power supply
is pulled loose from the stress relief.
Tightening torque for the terminal screws:
Screw size
M8 (power terminal block)
M8 (ground)
NOTICE
When connecting the earth wire, align the wire with the cut
out section of the cup washer. Incomplete earthing may
cause electrical shock.
14~20 HP
X1M
d
d
A
d
c b a
(a)
(a)
(a) . Use conduit.
Tightening torque (N•m)
5.5~7.3
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ heat pump
4P546228-1 – 2018.09
d
d