Examples - Daikin VRV II RXYQ5MY1B Installation Manual

• This unit uses an inverter, and therefore generates noise, which
will have to be reduced to avoid interfering with other devices. The
outer casing of the product may take on an electrical charge due
to leaked electrical current, which will have to be discharged with
the grounding.
• Be sure to install an earth leak detector. (One that can handle
higher harmonics.)
(This unit uses an inverter, which means that an earth leak detec-
tor capable handling high harmonics in order to prevent malfunc-
tioning of the earth leak detector itself.)
• Earth leak detector which are especially for protecting ground-
faults should be used in conjunction with main switch or fuse for
use with wiring.
• This unit has a negative phase protection circuit. (If it operates,
only operate the unit after correcting the wiring.)

7-4 Examples

System example (Refer to figure 13)
1. Field power supply
2. Main switch
3. Earth leak detector
4. Fuse
5. Cool / heat selector
6. Remote controller
power supply wiring (sheathed cable)
transmission wiring (sheathed cable)
Field line connection
L1, L2, L3, N-phase of the power cord should be clamped to the
safety catch using the included clamp material.
The green and yellow striped wrapped wires should be used for
grounding.
(Refer to figure 14)
1. Power supply
(200 V, Three-phase)
2. Branch switch, overcurrent breaker
3. Grounding wire
4. Earth leakage breaker
5. Section A
6. Attach insulation sleeves.
7. Power supply terminal block
8. Grounding wire
9. Retain the ground wires along with the power wires using the
accessory clamps (1).
10. Retain the respective power wires - L1, L2, L3 and N phases
- to the bracket individually using the accessory clamps (1).
11. Grounding wire
12. When wiring, do not allow the ground wires to contact the
compressor lead wires. If the wires contact each other,
adverse effects may occur to other units.
13. When connecting two wires to one terminal, ensure that the
crimp-style terminals face with each other back to back.
Moreover, make sure that the wire of the smaller gauge is
located above.
At the same time, retain the power wires to the plastic
bracket using the accessory clamps (1).
14. Terminal block
15. Crimp-style terminal
16. Wire gauge: Small
17. Wire gauge: Large
18. Plastic bracket
(Refer to figure 24)
1. Retain with accessory clamps (3).
2. Electric wiring
3. Wiring between units
4. Retain to the electric box with the accessory clamps (1).
5. When routing out the power/ground wires from the right side:
6. When routing the remote control cord and inter-unit wiring,
secure clearance of 50 mm or more from the power wiring.
Ensure that the power wiring does not contact any heated
sections ( ).
7. Retain to the back of the column support with the accessory
clamps (2).
8. When routing out the inter-unit wirings from the opening for
piping:
9. When routing out the power/ground wires from the front:
10. When routing out the ground wires from the left side:
11. Grounging wire
13
12. When wiring, exercise sufficient caution not to detach the
acoustic insulators from the compressor.
13. Retain to the back of the column support with the accessory
clamps (2).
14. Section A
15. Section B
16. Power supply
17. Branch switch, overcurrent breaker
18. Earth leakage breaker
19. Ground wire
20. Unit A
21. Unit B
22. Unit C
Caution
〈 〈 〈 〈 Precautions when laying power wiring
Use round pressure terminals for connections to the power termi-
nal block.
When none are available, follow the instructions below.
• Do not connect wiring of different thicknesses to the power ter-
minal block. (Slack in the power wiring may cause abnormal
heat.)
• When connecting wiring which is the same thickness, do as
shown in the figure below.
Round pressure terminal
Connect same- It is forbidden to
thickness wiring connect two to
to both sides. one side.
• For wiring, use the designated power wire and connect firmly,
then secure to prevent outside pressure being exerted on the
terminal board.
• Use an appropriate screwdriver for tightening the terminal
screws. A screwdriver with a small head will strip the head and
make proper tightening impossible.
• Over-tightening the terminal screws may break them.
• See the table below for tightening torque for the terminal
screws.
Tightening torque (N · m)
M8 (Power terminal block)
M8 (Ground)
M3 (Inter-unit wiring terminal block)
〈 〈 〈 〈 Precautions when connecting the ground
When pulling the ground wire out, wire it so that it comes through
the cut out section of the cup washer. (An improper ground con-
nection may prevent a good ground from being achieved.)
Round pressure terminal
Field line connection: transmission wiring and cool/heat selection
[In case of RXYQ5-16MY1B]
(Refer to figure 16)
1. Cool/heat selector
2. Outdoor unit P.C. board (A1P)
3. Take care of the polarity
4. Use the conductor of sheathed wire (2 wire) (nopolarity)
5. Terminal board (field supply)
6. Indoor unit
[In case of RXYQ18-48MY1B]
(Refer to figure 18)
1. Unit A (Base unit)
2. Unit B
〉 〉 〉 〉
Power wire
It is forbidden to
connect wiring of
different thicknesses.
5.5-7.3
0.8-0.97
〉 〉 〉 〉
Cup washer
Cut out section
English