Leading Wire Procedure; Transmission Wiring Connection Procedure - Daikin VRV IV REYQ72TATJ Series Installation Manual

9 .3 . leading wire procedure

• The power wiring and ground wiring are passed out from the power
wiring hole on the front (knock hole).
• The transmission wiring is passed out from the wiring hole (knock
hole) on the front of the unit.
REYQ72T
1
2
4
3
1 Wiring diagram printed on the back of the control box cover.
2 Knockout hole
3 Power line
4 Transmission line
REYQ72T
1
2
3
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 above figures.)
• When passing wiring through the knock holes, remove burrs around
the knock holes and protect the wiring with protective tape.
(Refer to the above figures.)
• If small animals might enter the unit, block off any gaps (hatching
parts in the above figures) 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.
3P362438-5N English
REYQ96-168T
1
4
1
REYQ96-168T
2
3
1
3
5
A1P
TO I N / D UNI T TO OUT/D UNI T TO MULTI UNI T
F1 F2 F1 F2 Q1 Q2
1 1
1 2
F1 F2 F1
TO OUT/D UNIT TO IN/D UNIT
2
11
F1 F2
12
3
F1 F2 F1
TO OUT/D UNIT TO BS UNIT
14
1 Master unit (*)
2 Sub unit (*)
3 Outdoor unit A
4 Outdoor unit B
5 Control box (1)
6 (Only REYQ-TAYD*)
Control box (2)
7
(Only REYQ-TAYD*)
Do not open the control box (2) cover.
(There are no work when installation.)
8 Never connect the power wire.
9 To outdoor unit of other system
10 Use duplex wires (No polarity)
11 Branch Selector unit
12 Indoor unit
13 Indoor unit (Cooling only)
14 DOAS unit
(*) : The outdoor unit that connect the transmission wiring to
Branch Selector unit is Master unit of the multi system.
And the other units are Sub unit. (In this figure, outdoor
unit A is the Master unit.)
Check operation in installation work, onsite settings and so
on are done by operating the printed circuit board (A1P) of
Master unit.
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 by way of Branch Selector unit should be
wired to F1 and F2 on the outdoor 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)
• Transmission wiring (about the symbol 1 - 2 , see the foregoing
figure) should be done within the following limitations.
7 7
2
4
6 5 6
A1P
TO MULTI UNI T
Q1 Q2
2
8
9
:
10
13
F2 F1 F2 F1 F2
1 1
TO OUT/D UNIT TO IN/D UNIT
F1 F2
11
F1 F2 F1 F2 F1 F2
F1 F2
12
F2 F1 F2 F1 F2
TO OUT/D UNIT TO BS UNIT
14
Tightening torque
0.59-0.71 ft lbf (0.8-0.97 N m)
• •
20