Field Wiring; Optional Parts Cool/Heat Selector; Power Circuit And Cable Requirements; General - Daikin VRV II RX5MY1 Installation Manual

7.

FIELD WIRING

Caution
All field wiring and components must be installed by a licensed elec-
trician and must comply with relevant local and national regulations.
The field wiring must be carried out in accordance with the wir-
ing diagrams and the instructions given below.
Be sure to use a dedicated power circuit. Never use a power
supply shared by another appliance.
This product's reversed phase protection detector only works
when the product started up.
The reversed phase protection detector is designed to stop the
product in the event of an abnormalities when the product is
started up.
Replace two of the three phases (L1, L2, and L3) during
reverse-phase protection circuit operation.
Reversed phase detection is not performed while the product is
operating.
If there exists the possibility of reversed phase after an momen-
tary black out and the power goes on and off while the product
is operating, attach a reversed phase protection circuit locally.
Running the product in reversed phase can break the compres-
sor and other parts.

7-1 Optional parts cool/heat selector

S1S...............................Selector switch (fan, cool/heat)
S2S...............................Selector switch (cool/heat)
Note
• Use copper conductors only.
• When using the adaptor for sequential start, refer to chapter

"Examples".

• For connection wiring to outdoor-outdoor transmission F1-F2,
outdoor-indoor transmission F1-F2, outdoor-multi transmission
Q1-Q2, refer to chapter "Examples".
• For connection wiring to the central remote controller, refer to the
installation manual of the central remote controller.
• Use insulated wire for the power cord.

7-2 Power circuit and cable requirements

A power circuit (see table below) must be provided for connection of
the unit. This circuit must be protected with the required safety
devices, i.e. a main switch, a slow blow fuse on each phase and an
earth leak detector.
Phase and
Voltage
frequency
φ 3, 50Hz
RX5MY1(E)
380-415V
φ 3, 50Hz
RX8MY1(E)
380-415V
φ 3, 50Hz
RX10MY1(E)
380-415V
φ 3, 50Hz
RX12MY1(E)
380-415V
φ 3, 50Hz
RX14MY1(E)
380-415V
φ 3, 50Hz
RX16MY1(E)
380-415V
φ 3, 50Hz
RX18MY1(E)
380-415V
φ 3, 50Hz
RX20MY1(E)
380-415V
φ 3, 50Hz
RX22MY1(E)
380-415V
φ 3, 50Hz
RX24MY1(E)
380-415V
RX26MY1(E) φ 3, 50Hz
380-415V
φ 3, 50Hz
RX28MY1(E)
380-415V
φ 3, 50Hz
RX30MY1(E)
380-415V
φ 3, 50Hz
RX32MY1(E)
380-415V
RX34MY1(E) φ 3, 50Hz
380-415V
φ 3, 50Hz
RX36MY1(E)
380-415V
RX38MY1(E) φ 3, 50Hz
380-415V
φ 3, 50Hz
RX40MY1(E)
380-415V
RX42MY1(E) φ 3, 50Hz
380-415V
φ 3, 50Hz
RX44MY1(E)
380-415V
RX46MY1(E) φ 3, 50Hz
380-415V
φ 3, 50Hz
RX48MY1(E)
380-415V
When using residual current operated circuit breakers, be sure to use
a high-speed type 200mA rated residual operating current.
Note
• Select the power supply cable in accordance with relevant local
and national regulations.
• Wire size must comply with the applicable local and national code.
English
Recommended Transmission
fuses line selection
20A 0.75-1.25mm 2
30A 0.75-1.25mm 2
30A 0.75-1.25mm 2
30A 0.75-1.25mm 2
40A 0.75-1.25mm 2
40A 0.75-1.25mm 2
50A 0.75-1.25mm 2
60A 0.75-1.25mm 2
60A 0.75-1.25mm 2
60A 0.75-1.25mm 2
70A 0.75-1.25mm 2
70A 0.75-1.25mm 2
70A 0.75-1.25mm 2
2
80A 0.75-1.25mm
90A 0.75-1.25mm 2
90A 0.75-1.25mm 2
90A 0.75-1.25mm 2
2
100A 0.75-1.25mm
100A 0.75-1.25mm 2
100A 0.75-1.25mm 2
110A 0.75-1.25mm 2
110A 2
0.75-1.25mm
• Specifications for local wiring power cord and branch wiring are in
compliance with IEC60245.
• WIRE TYPE H05VV(*)
*Only in protected pipes, use H07RN-F when protected pipes are
not used.

7-3 General

• Up to 3 units can be connected by crossover power source wiring
between outdoor units. However, units of smaller capacity must
be connected downstream. For details, refer to the equipment
design data and technical data.
• Make sure to connect the power source wire to the power source
terminal block and to clamp it as shown in figure 14, chapter "Field
line connection".
• As this unit is equipped with an inverter, installing a phase
advancing capacitor not only will deteriorate power factor
improvement effect, but also may cause capacitor abnormal heat-
ing accident due to high-frequency waves. Therefore, never install
a phase advancing capacitor.
• Keep power imbalance within 2% of the supply rating.
1.
Large imbalance will shorten the life of the smoothing capacitor.
2.
As a protective measure, the product will stop operating and
an error indication will be made, when power imbalance
exceeds 4% of the supply rating.
• Follow the "electrical wiring diagram" when carrying out any elec-
trical wiring.
• Only proceed with wiring work after blocking off all power.
• Always ground wires. (In accordance with national regulations of
the pertinent country.)
• Do not connect the ground wire to gas pipes, sewage pipes, light-
ning rods, or telephone ground wires.
• Gas pipes: can explode or catch fire if there is a gas leak.
• Sewage pipes: no grounding effect is possible if hard plastic
piping is used.
• Telephone ground wires and lightning rods: dangerous when
struck by lightning due to abnormal rise in electrical potential
in the grounding.
• 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.
(N-phase: For RX-MY1(E))
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