Field Wiring; Optional Parts Cool/Heat Selector; Power Circuit And Cable Requirements; General - Daikin VRV II RXYQ5MY1B Installation Manual

When multiple outdoor units installed: In case of
RXYQ18-48MY1B
(Refer to figure 12)
[Additional refrigerant charge procedure]
To learn the system settings for additional refrigerant charging, refer
to the [Service Precaution] label attached on the back of the electric
box lid in the outdoor unit.
1.
Fully open the gas line shutoff valve/oil-equalizing line shutoff
valve (liquid line shutoff valve and valves A and B above must
be left fully closed), start the additional refrigerant charge
operation.
2.
After the system is charged with a specified amount of refrig-
erant, press the confirmation button (BS3) on the P-board
(A1P) in the outdoor unit to stop the additional refrigerant
charge operation.
3.
Immediately restore the shutoff valve to the following status.
(Otherwise, the piping may burst due to liquid seal.)
Liquid line Gas line
shutoff valve shutoff valve
Open Open
Caution
If the refrigerant cylinder is siphonal, set it upright while charging
additional refrigerant.
7.

FIELD WIRING

Caution
All field wiring and components must be installed by a licensed
electrician and must comply with relevant local and national regula-
tions.
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.
English

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.
RXYQ5MY1B
RXYQ8MY1B
RXYQ10MY1B
RXYQ12MY1B
RXYQ14MY1B
RXYQ16MY1B
RXYQ18MY1B
RXYQ20MY1B
RXYQ22MY1B
RXYQ24MY1B
Oil-equalizing line
shutoff valve
RXYQ26MY1B
RXYQ28MY1B
Open
RXYQ30MY1B
RXYQ32MY1B
RXYQ34MY1B
RXYQ36MY1B
RXYQ38MY1B
RXYQ40MY1B
RXYQ42MY1B
RXYQ44MY1B
RXYQ46MY1B
RXYQ48MY1B
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.
• 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.
2.
• 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.
•
•
•
Phase and
Voltage
frequency
φ 3, 50Hz
380-415V
φ 3, 50Hz
380-415V
φ 3, 50Hz
380-415V
φ 3, 50Hz
380-415V
φ 3, 50Hz
380-415V
φ 3, 50Hz
380-415V
φ 3, 50Hz
380-415V
φ 3, 50Hz
380-415V
φ 3, 50Hz
380-415V
φ 3, 50Hz
380-415V
φ 3, 50Hz
380-415V
φ 3, 50Hz
380-415V
φ 3, 50Hz
380-415V
φ 3, 50Hz
380-415V
φ 3, 50Hz
380-415V
φ 3, 50Hz
380-415V
φ 3, 50Hz
380-415V
φ 3, 50Hz
380-415V
φ 3, 50Hz
380-415V
φ 3, 50Hz
380-415V
φ 3, 50Hz
380-415V
φ 3, 50Hz
380-415V
Large imbalance will shorten the life of the smoothing capacitor.
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.
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.
Recommended Transmission
fuses line selection
20A 0.75-1.25mm 2
30A 2
0.75-1.25mm
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 2
0.75-1.25mm
50A 0.75-1.25mm 2
50A 0.75-1.25mm 2
2
60A 0.75-1.25mm
60A 0.75-1.25mm 2
70A 2
0.75-1.25mm
70A 0.75-1.25mm 2
70A 0.75-1.25mm 2
2
90A 0.75-1.25mm
90A 0.75-1.25mm 2
90A 2
0.75-1.25mm
100A 0.75-1.25mm 2
100A 0.75-1.25mm 2
100A 2
0.75-1.25mm
110A 0.75-1.25mm 2
110A 2
0.75-1.25mm
12