To Route And Fix The Transmission Wiring; To Connect The Transmission Wiring; To Finish The Transmission Wiring; To Route And Fix The Power Supply - Daikin VRV W T-Series Installation Manual

5 Installation
5 .8 .4

To route and fix the transmission wiring

Transmission wiring can be routed through the front side only. Fix it
to the upper mounting hole.
A
Fix to the indicated plastic brackets (factory installed).
5 .8 .5

To connect the transmission wiring

The wiring from the indoor units must be connected to the F1/F2
(In-Out) terminals on the PCB in the outside unit.
Tightening torque for the transmission wiring terminal screws:
Screw size
M3.5 (A1P)
In case of heat recovery mode
TO IN/D UNIT TO OUT/D UNIT TO MULTI UNIT
d
F1 F2 F1 F2 Q1Q2
a b
A1P A1P
F F F F Q Q Q Q
1 2 1 2 1 2 1 2
e e
g
a Unit A (main outside unit)
b Unit B (sub outside unit)
c Unit C (sub outside unit)
d Outside unit PCB (A1P)
e Main/sub transmission (Q1/Q2)
f Outside/indoor transmission (F1/F2)
g Outside unit/other system transmission (F1/F2)
h
Branch selector unit
i Indoor unit
j Cooling-only VRV indoor unit
Installation manual
32
A
TO IN/D UNIT TO OUT/D UNIT TO MULTI UNIT
F1 F2 F1 F2 Q1 Q2
A1P
Tightening torque
0.59~0.71 ft·lbf (0.8~0.97 N·m)
f
F1 F2 F1 F2 F1 F2 F1 F2
TO IN/D TO OUT/D TO IN/D TO OUT/D
UNIT UNIT UNIT UNIT
h h
c
A1P
Q Q
1 2
F1 F2 F1 F2 F1 F2 F1 F2
i i
j
F1 F2 F1 F2
In case of heat pump mode
b c d
A1P
F1 F2 F1 F2 Q1 Q2 Q1 Q2 Q1 Q2
e f f
e
F1 F2 F1 F2
h
i
F1 F2 F1 F2
a Outside unit PCB (A1P)
b Unit A (main outside unit)
c Unit B (sub outside unit)
d Unit C (sub outside unit)
e Outside unit/other system transmission (F1/F2)
f Outside-outside unit transmission (Q1/Q2)
g Indoor unit
h
Use the conductor of sheathed wire (2 wire) (no polarity)
i Terminal board (field supply)
▪ The interconnecting wiring between the outside 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 outside unit to which the
interconnecting wiring for the indoor units is connected.
▪ The base unit is the outside unit to which the interconnecting
wiring for the indoor units is connected.
5 .8 .6

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.
c
f
b
d
f
a
e
f
a Liquid pipe
b Gas pipe
c Finishing tape
d High pressure/low pressure gas pipe
e Transmission wiring (F1/F2)
f
Insulator
5 .8 .7

To route and fix the power supply

NOTE
When routing ground wires, secure clearance of 1 inch
(25.4 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 ground.
VRV W T-Series water-cooled system air conditioner
F1 F2 F1 F2 Q1 Q2
TO IN/D UNIT TO OUT/D UNIT TO MULTI UNIT
g a
F1 F2
F1 F2
RWEQ96~432TAYCU
4P540122-1B – 2018.11