7
Electrical characteristics
MCA: Min. circuit Amps (A)
MFA: Max. Fuse Amps (A)
Specifications for field wire
Wiring example and how to set the remote
controller
How to connect wiring
Remove the switch box cover as shown in
figure 13
, 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.
Do not connect wires of different gauge to the same grounding
terminal. Looseness in the connection may deteriorate the
protection.
3.
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.
4.
For the remote controller wiring, refer to the "Installation manual
of the remote controller" supplied with the remote controller.
5.
Never connect the power supply wiring to the terminal board for
transmission wiring. This mistake could damage the entire
system.
6.
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.
Keep total current of crossover wiring between indoor units less than
12 A. Branch the line outside the terminal block of the unit in
accordance with the 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.
Model
Hz
Volts
Voltage
range
Power supply
MCA
MFA
35
50/60
220-240/220
±10%
0.8
16 A
50
0.8
60
0.7
71
0.7
100
1.3
125
1.9
140
1.9
NOTE
For details, refer to "Electrical data" in the technical
data book.
Wire
Size (mm
2
)
Length
Between
indoor units
H05VV-U4G
(a),(b)
(a) Shows only in case of protected pipes. Use H07RN-F in case of no protection.
(b) Run transmission wiring between the indoor and outdoor units through a conduit
to protect against external forces, and feed the conduit through the wall together
with refrigerant piping.
2.5
—
Unit-Remote
controller
Sheathed wire
(2 wire)
(c)
(c) Use double insulation wire for remote controller (sheath thickness:
≥
1 mm) or run
wires through a wall or conduit so that the user cannot come in contact with them.
0.75–1.25
Max. 500 m
(d)
(d) This length shall be the total extended length in the system of the group control.
1
Switch box cover
2
Switch box low voltage wiring inlet
3
Switch box high voltage wiring inlet
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 remote controller
0.79~0.97
Terminal block for power supply
1.18~1.44
NOTE
The customer has the ability to select the remote
controller thermistor.
Summary of Contents for FBQ50D2VEB
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