![background image](http://html1.mh-extra.com/html/daikin/reyq72-96mtju/reyq72-96mtju_installation-manual_2459819034.webp)
Installation
EDUS39-605
33
Installation of Outdoor Units
Setting the cool/heat operation
1.
Perform cool/heat setting with the remote controller con-
nected to the indoor unit.
Keep the COOL/HEAT selector switch (DS1) on the out-
door unit PC board (A1P) at the factory setting position IN/
D UNIT.
Refer to figure 18.
1.
1 = Remote controller
2.
Perform cool/heat setting with the COOL/HEAT selector.
Connect the COOL/HEAT selector remote controller
(optional) to the A/B/C terminals and set the COOL/HEAT
selector switch (DS1) on the outdoor unit PC board (A1P)
to OUT/D UNIT.
Refer to figure 19.
1.
1 = COOL/HEAT selector
NOTE
For low-noise operation, it is necessary to obtain the
optional
External Control Adaptor for Outdoor Unit
.
For details, see the installation manual attached to the
adaptor.
Picking power line and transmission line
•
Be sure to let the power line and the transmission line pass
through a conduit hole.
•
Pick the power line from the upper hole on the front position
of the main unit.
Refer to figure 20.
1.
Electric wiring diagram
Printed on the back of the electric box lid.
2.
Knockout hole
3.
Power line
4.
Transmission line
Precautions when knocking out knockout
holes
•
To punch out a knockout hole, hit it with a hammer.
•
Open an appropriate hole as needed.
•
After knocking out the holes, we recommend you paint
the edges and areas around the edges using the repair
paint to prevent rusting.
•
Power line: Open a knockout hole as shown at left and
connect it using a conduit.
•
Transmission line: Connect it using a conduit in the
knockout hole on the right.
CAUTION
•
Always adequately protect and insulate the power wir-
ing.
•
Outside the unit, make sure the weak electric wiring (i.e.
for the remote control, between units, etc.) and the
strong electric wiring do not pass near each other, keep-
ing them at least 50 mm apart. Proximity may cause
electrical interference, malfunctions, and breakage.
•
Be sure to connect the power wiring to the power wiring
terminal block and secure it as described in
7-4 Field line
connection.
•
Inter-unit wiring should be secured as described in
7-4
Field line connection
.
•
Secure the wiring with the accessory clamps so that
it does not touch the piping.
•
Make sure the wiring and the electric box lid do not
stick up above the structure, and close the cover
firmly.
WARNING
•
Never connect a 200 volt line to the terminal block of the
interconnecting wiring because doing so damages the
entire system.
•
The wiring from the indoor units must be connected to the
F1/F2 (In-Out) terminals on the PC board in the outdoor
unit.
For the above wiring, always use vinyl cords with AWG 18-16
sheath or cables (2 core wires). (3 core wire cables are allow-
able for COOL/HEAT selector only.)
[In case of multiple outdoor units]
•
The interconnecting wiring between the outdoor units in the
same pipe line must be connected to the Q1/Q2 (Out Multi)
terminals. Connecting the wires to the (Out-Out) terminals
results in system malfunction.
•
The wiring for the other lines must be connected to the F1/
F2 (Out-Out) terminals of the P-board in the outdoor unit to
which the interconnecting wiring for the indoor units is con-
nected.
•
The base unit is the outdoor unit to which the interconnect-
ing wiring for the indoor units is connected.
•
The interconnecting wiring between the outdoor units must
be 100ft. maximum length .
NOTE
•
Be sure to keep the power line and transmission line
apart from each other.
•
Be careful about polarity of the transmission line.
•
Make sure that the transmission line is clamped as
shown in the figure in chapter Section 7-4
Field Line
Connection
.
.
Burr
Knockout hole
Left side
Right side
Lock nut
Conduit
mounting
plate
Conduit
Electric box
(A1P)
Use the accessory clamps (1)
to retain them to the electric box.
Vinyl tube
(Accessory)