Transmission Wiring Connection Procedure - Daikin REYQ72TTJU Installation Manual

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.
7
1
3
5 6
A1P
TO I N / D UNI T TO OUT/D UNI T TO MULTI UNI T
F1 F2 F1 F2 Q1 Q2
8
1 1
:
1 2 10
F1 F2 F1 F2
1
TO OUT/D UNIT TO IN/D UNIT
11
F1 F2 F1 F2
12
1 Master unit (*)
2 Sub unit (*)
3 Outdoor unit A
4 Outdoor unit B
5 Electrical components box (1)
6 (Only REYQ~TYDN)
Electrical components box (2)
7 (Only REYQ~TYDN)
Do not open the electrical components 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)
3P362438-3H English
1
REYQ96-168T
2
3
7
2
4
5 6
A1P
TO MULTI UNI T
Q1 Q2
2
9
13
F1 F2 F1 F2
1
TO OUT/D UNIT TO IN/D UNIT
F1 F2
11
F1 F2 F1 F2
F1 F2
12
11 BS unit
12 Indoor unit
13 Indoor unit (Cooling only)
(*) : The Outdoor unit that connect the transmission wiring to
BS 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 PC-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.
• 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 BS (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.
REYQ72T
1 (A1P)
X1M
2
Tightening torque
lbf (0.8-0.97 N m)
• •
2
F1 F2 F1 F2
F1 F2 F1 F2
REYQ96-168T
1 (A1P)
X1M
2
1 In the control box
2 Clamp (1) (accessory)
20