Daikin VRV IV RXMLQ8T7Y1B Series, Installation And Operation Manual

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5 Installation
Installation and operation manual
19
RXYLQ10~14T7Y1B*
VRV IV system air conditioner
4P543426-1 – 2018.07
5.7.2 Guidelines when knocking out knockout
holes
▪ To punch a knockout hole, hit on it with a hammer.
▪ After knocking out the holes, we recommend removing any burrs
and paint the edges and areas around the holes using repair paint
to prevent rusting.
▪ When passing electrical wiring through the knockout holes.
prevent damage to the wires by wrapping the wiring with
protective tape, putting the wires through field supplied protective
wire conduits at that location, or install suitable field supplied wire
nipples or rubber bushings into the knockout holes.
a
b c
d
a Knockout hole
b Burr
c Remove burrs
d If there are any possibilities that small animals enter the
system through the knockout holes, close the holes with
packing materials (to be prepared on-site)
5.7.3 To route and fix the transmission wiring
Transmission wiring can be routed through the front side only. Fix it
to the upper mounting hole.
b a
c
d
c
A
A
a Transmission wiring (possibility 1)
(a)
b Transmission wiring (possibility 2)
(a)
. Fix to pipe insulation
with tie wraps.
c Tie wrap. Fix to factory-mounted low voltage wiring.
d Tie wrap.
(a) Knockout hole has to be removed. Close the hole to avoid
small animals or dirt from entering.
c
d
a b
Fix to the indicated plastic brackets using field supplied clamping
material.
a Wiring between the units (indoor-outdoor) (F1/F2 left)
b Internal transmission wiring (Q1/Q2)
c Plastic bracket
d Field supplied clamps
5.7.4 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 outdoor unit.
Tightening torque for the transmission wiring terminal screws:
Screw size Tightening torque (N•m)
M3.5 (A1P) 0.8~0.96
In case of single outdoor unit installation
F
1
F
2
F
1
F
2
Q
1
Q
2
F1 F1 F2 F2 Q1 Q2
F1 F2 F1 F2 F1 F2
F1 F2 F1 F2 F1 F2
b
c
a
d
e
TO IN/D UNIT TO OUT/D UNIT TO MULTI UNIT
A1P
a Outdoor unit PCB (A1P)
b Use the conductor of sheathed wire (2 wire) (no polarity)
c Terminal board (field supply)
d Indoor unit
e Outdoor unit
In case of multi outdoor unit installation
F1 F2 F1 F2 Q1 Q2 Q1 Q2
A1P
d d e f
b a c
Q1 Q2
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)
▪ 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.
5.7.5 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.