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3 Power cable with ground wire. (Keep proper distance
between power cable and control wiring).
4 Clamp (field supply)
5 Stop valve mounting plate
6 Power cable
Precautions when knocking out knock-out 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.
If there is any possibility that small animals enter the system
through the knock holes, plug the holes with packing materials
(to be prepared on-site).
1
2
1 Knock-out hole
2 Burr
3 Packing materials
CAUTION
Use a power wire pipe for the power wiring.
Outside the unit, make sure the low voltage electric
wiring (i.e. for the remote control, between units, etc.)
and the high voltage electric wiring do not pass near
each other, keeping them at least 50 mm apart.
Proximity
may
malfunctions, and breakage.
Be sure to connect the power wiring to the power
wiring terminal block and secure it as described under
"11.4. Connecting power wire and transmission wires"
on page 15.
Inter-unit wiring should be secured as described in
"11.4. Connecting power wire and transmission wires"
on page 15.
•
Secure the wiring with 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.
11.5.
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 the phase and an
earth leakage breaker.
Phase and frequency
Voltage
Recommended field fuse
Minimum circuit amps
(a)
(MCA)
Transmission line section
(b)
Wire type
(a) Stated values are maximum values (see electrical data of combination with indoor
units for exact values).
(b)
Only in protected pipes, use H07RN-F when protected pipes are not used.
Installation manual
16
3
cause
electrical
interference,
RXYSQ_Y1
3N~ 50 Hz
380-415 V
16 A
13.5
2
0.75~1.25 mm
H05VV
NOTICE
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.
When installing the earth leakage breaker make sure that it is
compatible with the inverter (resistant to high frequency
electrical noise) to avoid unnecessary opening of the earth
leakage breaker.
In connecting the power cable to the power terminal block,
securely clamp the cable as shown in figure 10.
After finishing the electric work, confirm that each electric
part and terminal inside the electric parts box is connected
securely.
Precautions when laying power wiring
Use round pressure terminals for connections to the power
terminal block.
When none are available, follow the instructions below.
Do not connect wiring of different thicknesses to the
power terminal 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.
1
1 Round pressure terminal
2 Power wire
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)
M5 (Power terminal block/ground wire)
M4 (Shielded ground)
M3.5 (Control wiring block)
Field line connection: Control wiring and cool/heat selection
WARNING
If an excessive force is applied while connecting a cable to
the terminal block on the PC board, the PC board may be
damaged.
see figure 11.
1 Cool/heat selector
2 Outdoor unit PC board
3 Take care of the polarity
4 Use the conductor of sheathed wire (2 wire) (no polarity)
5 Terminal board (field supply)
2
2.39~2.92
1.18~1.44
0.79~0.97
RXYSQ6P8Y1B9
VRVIII-S System air conditioner
4P357505-1 – 2013.08
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