Daikin VRV W T-series - Reference Information; Error Code Display

5 Installation
Installation manual
32
RWEQ96~432TAYCU
VRV W T-Series water-cooled system air conditioner
4P540122-1B – 2018.11
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.
F1 F1F2 F2 Q1 Q2
TO IN/D UNIT TO OUT/D UNIT TO MULTI UNIT
A
A1P
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 Tightening torque
M3.5 (A1P) 0.59~0.71 ft·lbf (0.8~0.97 N·m)
In case of heat recovery mode
F1 F2 F1 F2 Q1 Q2
F1 F1F2 F2 Q1Q2
g
e
TO IN/D UNIT
TO OUT/D UNIT TO MULTI UNIT
A1P
Q1 Q2
A1P
Q1 Q2
A1P
a b c
d
f
F1 F2 F1 F2 F1 F2 F1 F2
TO IN/D
UNIT
TO OUT/D
UNIT
TO IN/D
UNIT
TO OUT/D
UNIT
F1 F2 F1 F2 F1 F2 F1 F2
F1 F2 F1 F2
j
ii
hh
e
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
In case of heat pump mode
F1 F1F2 F2 Q1 Q2
TO IN/D UNIT
TO OUT/D UNIT TO MULTI UNIT
F1 F2 F1 F2 F1 F2
F1 F2 F1 F2 F1 F2
F1 F2 F1 F2 Q1 Q2 Q1 Q2
A1P
e
Q1 Q2
a
h
i
g
f
cb d
e f
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.
b
a
f
c
d
f
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.