Transmission Wiring Connection Procedure - Daikin REYQ72TAYCU Manuel D'installation

REYQ72-168T 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 19.)
• 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 19.)
• If small animals might enter the unit, block off any gaps (hatching
parts in the figure on page 19) 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
3
5
A1P
TO I N / D UNI T TO OUT/D UNI T TO MULTI UNI T
F1 F2 F1 F2 Q1 Q2
2
6
1 1
1 2 : 8
F1 F2 F1 F2
1
TO OUT/D UNIT TO IN/D UNIT TO OUT/D UNIT TO IN/D UNIT
9
F1 F2 F1 F2
10
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 Branch Selector unit
10 Indoor unit
11 Indoor unit (Cooling only)
(*) : 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.
3P362438-9J English
1
2
3
2
4
5
A1P
TO MULTI UNI T
Q1 Q2
7
11
F1 F2 F1 F2
1
F1 F2
9
F1 F2 F1 F2
F1 F2
10
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) 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 Branch Selector (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)
Tightening torque
lbf (0.8-0.97 N m)
• •
2
F1 F2 F1 F2
F1 F2 F1 F2
20