Transmission Wiring Connection Procedure - Daikin VRV IV Manuel D'installation

RXYQ72-168T type
1 Control box cover
2 Inspection door
3 [Service precautions] Label location
NOTE
• Open the knock holes with a hammer or similar tool.
• After knocking out the holes, we recommend you remove any burrs
and paint the holes with repair paint to prevent rusting.
(Refer to the figure on page 16.)
• When passing wiring through the knock holes, remove burrs around
the knock holes and protect the wiring with protective tape.
(Refer to the figure on page 16.)
• If small animals might enter the unit, block off any gaps (hatching
parts in the figure on page 16) with material (field supply).

9 .4 . Transmission wiring connection procedure

• Referring to the figure below, connect the transmission wiring be-
tween outdoor unit and indoor unit, outdoor unit and outdoor unit of
other system, outdoor unit and outdoor unit of same system.
1 2
3 4
5 5
A1P
A1P
TO I N / D UNI T TO OUT/D UNI T TO MULTI UNI T TO MULTI UNI T
F1 F2 F1 F2 Q1 Q2 Q1 Q2
2
6
1 1
7
1 Master unit (*)
2 Sub unit (*)
3 Outdoor unit A
4 Outdoor unit B
5 Control box
6 Never connect the power wire.
7 To outdoor unit of other system
8 Use duplex wires (No polarity)
9 Indoor unit
(*) : The Outdoor unit that connects the transmission wiring to
an indoor unit is Master unit of the multi system.
The other units are Sub units. (In this figure, Outdoor unit A
is the Master unit.)
Check installation work to ensure proper operation. Onsite
settings can be accomplished by operating the printed
circuit board (A1P) of Master unit.
English
1
2
3
:
1 2 8
F1 F2 F1 F2 F1 F2
9
NOTE
• Do not connect the power wiring to terminals for the transmission
wiring. Doing so would destroy the entire system.
• Wiring to the indoor unit should be wired to F1 and F2 on the out-
door unit's terminal block (A1P_X1M).
• The above wiring should be wired using AWG18-16 stranded, non-
shielded wiring.
• All transmission wiring is to be procured onsite.
• When connecting wires to the terminal block on the printed circuit
board, too much heat or tightening could damage the printed circuit
board. Attach with care.
See the table below for the tightening torque of the transmission
wiring terminals.
Screw size
M3.5 (A1P) 0.59-0.71 ft
• Transmission wiring (about the symbol 1 - 2 , see the foregoing
figure) should be done within the following limitations.
If they are exceeded, transmission problems may occur.
1 Between outdoor unit and indoor unit
Between outdoor unit and outdoor unit of other systems
Max. wiring length : 3280 ft. (1000 m)
Max. total wiring length : 6560 ft. (2000 m)
Max. no. of branches : 16
[Note] No branch is allowed after a branch. See the
following figure.
Max. no. of outdoor units of other system that can be con-
nected : 10
1
F1 F2
1 Branch
2 Branch after branch
2 Between outdoor unit and outdoor unit of same system
Max. wiring length : 98 ft. (30 m)
• The transmission wiring inside the control box should be secured
using the clamp (1) as shown in the figure below.
RXYQ72-168T type
1 (A1P)
X1M
1 In the control box
2 Clamp (1) (accessory)
Tightening torque
lbf (0.8-0.97 N m)
• •
2
F1 F2 F1 F2
F1 F2 F1 F2
2
20