Guidelines When Knocking Out Knockout Holes; To Route And Fix The Transmission Wiring; To Connect The Transmission Wiring - Daikin VRV IV+ RYYQ12U7Y1B Series Installer And User Manual

B Master/slave transmission wiring
For the above wiring, always use vinyl cords with 0.75 to 1.25 mm
sheath or cables (2-core wires). (3-core wire cables are allowable for
the cooler/heater changeover user interface only.)
6.8.4 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
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)
6.8.5

To route and fix the transmission wiring

Transmission wiring can be routed through the front side only. Fix it
to the upper mounting hole.
8~12 HP
A
b a
A
a Transmission wiring (possibility 1)
b Transmission wiring (possibility 2)
with tie wraps.
c Tie wrap. Fix to factory-mounted low voltage wiring.
d Tie wrap.
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ heat pump
4P546228-1 – 2018.09
c d
14~20 HP
c
c
c
d
A
b a
(a)
(a)
. Fix to pipe insulation
(a) Knockout hole has to be removed. Close the hole to avoid
small animals or dirt from entering.
2
8~12 HP
a
X1A
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
6.8.6

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
M3.5 (A1P)
c
In case of single outdoor unit installation
c
A1P
F F F F Q Q F1
1 2 1 2 1 2
TO IN/D UNIT TO OUT/D UNIT TO MULTI UNIT
e
a
d
F1 F2 F1 F2
b
c
F1 F2 F1 F2
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
6 Installation
14~20 HP
b a b
Tightening torque (N•m)
0.8~0.96
F2 F1 F2 Q1 Q2
d
F1 F2
F1 F2
Installer and user reference guide
c
d
35