Before Operation; Checks Before Initial Start-Up - Daikin VRV II RX5MY1 Installation Manual

Caution
For low-noise operation, it is necessary to get 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 left side plate, from
the front position of the main unit (through the conduit hole of the
wiring mounting plate - optional parts) or from a knock out hole to
be made in the unit's bottom plate.
(Refer to figure 21)
1. Electric wiring diagram
Printed on the back of the electric box lid.
2. Section A
3. Knockout hole
4. Power wiring between outdoor units
(When the wiring is routed out through the front panel.)
5. Power wiring between outdoor units
6. Set apart
7. Power wiring between outdoor units
(When the wiring is routed out through the lateral panel.)
8. Electric wiring
9. Through cover
10. Cut off the shaded zones before use.
Precautions when knocking out knock holes
• To punch a knock hole, hit on it with a hammer.
• After knocking out the holes, we recommend you paint the
edges and areas around the edges using the repair paint to
prevent rusting.
• When passing electrical wiring through the knock holes,
remove any burrs from the knock holes and wrap the wiring
with protective tape to prevent damage.
Knockout hole
If there are any possibilities that
Burr
small animals enter the system
through the knock holes,
plug the holes with packing
materials (to be prepared onsite).
Caution
• Use a power wire pipe for the power wiring.
• Outside the unit, make sure the weak electric wiring (i.e. for the
remote control, between units, etc.) and the strong electric wir-
ing do not pass near each other, keeping them at least 50 mm
apart. Proximity may cause electrical interference, malfunc-
tions, and breakage.
• Be sure to connect the power wiring to the power wiring termi-
nal block and secure it as described in 7-4 Field line connec-
tion.
• 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.
Never connect 200 V to the terminal block of the interconnecting wir-
ing. Doing so will break 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.
• After installing the interconnecting wires inside the unit, wrap
them along with the onsite refrigerant pipes using finishing tape,
as shown below.
(Refer to figure 23)
1. Liquid pipe
2. Gas pipe
3. Interconnecting wiring
4. Insulator
5. Finishing tape
For the above wiring, always use vinyl cords with 0.75 to 1.25 mm
sheath or cables (2 core wires). (3 core wire cables are allowable for
the cooler/heater changeover remote controller only.)
English
[In case of RX18-48MY1(E)]
• 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 connected.
• The base unit is the outdoor unit to which the interconnecting wir-
ing for the indoor units is connected.
• The interconnecting wiring between the outdoor units must be
30 m in length at maximum.
Use the accessory clamps (1)
to retain them to the electric box.
Caution
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 "Field line connection".
Check that wiring lines do not make contact with refrigerant piping.
Firmly close the lid and arrange the electrical wires so as to pre-
vent the lid or other parts from coming loose.
When you don't use a wire conduit, be sure to protect the wires
with vinyl tubes etc, to prevent the edge of the knock-out hole
from cutting the wires.
8.

BEFORE OPERATION

8-1 Checks before initial start-up

Caution
Make sure that the circuit breaker on the power supply panel of
the installation is switched off.
Attach the power wire securely.
Introducing power with a missing N-phase or with a mistaken N-
phase will break the equipment.
After the installation, check the following before switching on the cir-
cuit breaker:
1.
The position of the switches that require an initial setting
Make sure that switches are set according to your application
needs before turning the power supply on.
2.
Power supply wiring and transmission wiring
Use a designated power supply and transmission wiring and
make sure that it has been carried out according to the instruc-
tions described in this manual, according to the wiring diagrams
and according to local and national regulations.
3.
Pipe sizes and pipe insulation
Make sure that correct pipe sizes are installed and that the insu-
lation work is properly executed.
4.
Additional refrigerant charge
The amount of refrigerant to be added to the unit should be written
on the included "Added Refrigerant" plate and attached to the rear
side of the front cover.
5.
Insulation test of the main power circuit
Using a megatester for 500V, check that the insulation resistance
of 2MΩ or more is attained by applying a voltage of 500V DC
between power terminals and earth. Never use the megatester for
the transmission wiring.
6.
Installation date
2
Be sure to keep record of the installation date on the sticker on the
electric box lid according to IEC60335-2-40.
Electric box
(A1P)
14