Installation and operation manual
7
FXMQ50-125P7VEB9
VRV System air conditioners
3P468515-4 – 12.2016
Specifications for field supplied fuses and wire
Allowable length of transmission wiring between indoor and outdoor
units, and between the indoor unit and the remote controller is as
follows:
1.
Outdoor unit - indoor unit: max. 1000 m (total wiring length:
2000 m)
2.
Indoor unit - remote controller: max 500 m
W
IRING
EXAMPLE
AND
HOW
TO
SET
THE
REMOTE
CONTROLLER
How to connect wiring
Remove the switch box cover as shown in
, and make the
connections.
PRECAUTIONS
1
Observe the notes mentioned below when wiring to the power
supply terminal board.
-
Use a round crimp-style terminal for insulation sleeve for
connection to the terminal block for wiring the units. When
none are available, follow the instructions below.
-
Do not connect wires of different gauge to the same power
supply terminal. (Looseness in the connection may cause
overheating.)
-
When connecting wires of the same gauge, connect them
according to the figure.
Use the specified electric wire. Connect the wire securely to
the terminal. Lock the wire down without applying excessive
force to the terminal. Use torques according to the table
below.
-
When attaching the control box lid, make sure not to pinch
any wires.
-
After all wiring connections are done, fill in any gaps in the
casing wiring holes with putty or insulation material (field
supply) thus to prevent small animals or dirt from entering the
unit from outside and causing short circuits in the control box.
2
Keep total current of crossover wiring between indoor units less
than 12 A. Branch the line outside the terminal board of the unit
in accordance with electrical equipment standards, when using
two power wiring of a gauge greater than 2 mm
2
(Ø1.6).
The branch must be sheathed in order to provide an equal or
greater degree of insulation as power supply wiring itself.
3
Do not connect wires of different gauge to the same grounding
terminal. Looseness in the connection may deteriorate the
protection.
4
Remote controller cords and wires connecting the units should
be located at least 50 mm away from power supply wiring. Not
following this guideline may result in malfunction due to electrical
noise.
5
For the remote controller wiring, refer to the "Installation manual
of the remote controller" supplied with the remote controller.
6
Never connect the power supply wiring to the terminal board for
transmission wiring. This mistake could damage the entire
system.
7
Use only specified wires and tightly connect wires to the
terminals. Be careful that wires do not place external stress on
the terminals. Keep wiring in neat order so that they do not
obstruct other equipment such as popping open the switch box
cover. Make sure the cover closes tight. Incomplete connections
could result in overheating, and in the worse case, electric shock
or fire.
Power supply wiring
Model
Field fuses
Wire
Size
20~125
16 A
H05VV-U3G
Local codes
Model
Wire
Size
20~125
Sheathed wire (2)
0.75-1.25 mm
2
NOTE
For details, refer to
1
Switch box cover
2
Transmission wiring port
3
Power supply wiring port
4
Wiring diagram
5
Switch box
1
2
3
1
Round crimp-style terminal
2
Attach insulation sleeve
3
Wiring
Tightening torque (N•m)
Terminal block for unit transmission and
remote controller
0.9
Terminal block for power supply
1.2
