Installation and operation manual
5
FXFQ20~125M8V3B
VRV System air conditioners
4PW25082-1A
ELECTRIC WIRING WORK
General instructions
■ All field supplied parts and materials and electric works must
conform to local codes.
■ Use copper wire only.
■ Follow the "Wiring diagram" attached to the unit body to wire the
outdoor unit, indoor units and the remote controller. For details
on hooking up the remote controller, refer to the "Installation
manual of the remote controller".
■ All wiring must be performed by an authorized electrician.
■ A circuit breaker capable of shutting down power supply to the
entire system must be installed.
Note that the operation will restart automatically if the main
power supply is turned off and then turned back on again.
■ This system consists of multiple indoor units. Mark each indoor
unit as unit A, unit B..., and be sure the terminal board wiring to
the outdoor unit and BS unit are properly matched. If wiring and
piping between the outdoor unit and an indoor unit are
mismatched, the system may cause a malfunction.
Electrical characteristics
MCA: Min. circuit Amps (A)
MFA: Max. Fuse Amps (A)
KW: Fan Motor Rated Output (kW)
FLA: Full Load Amps (A)
Specifications for field supplied fuses and wire
WIRING EXAMPLE AND HOW TO SET THE
REMOTE CONTROLLER
How to connect wiring (See figure 12)
■ Power supply wiring
Remove the switch box lid (1) and connect the wires to the
power supply terminal board inside. While doing this, pull the
wires inside through the rubber bush A and clamp the wires
along with other wires using clamp A, untightening the clip of
clamp A by pressing. After the connection, tighten clamp A as
before.
■ Unit wiring and remote controller wiring
Remove the switch box lid (2) and pull the wires inside through
the rubber bush B and connect to the terminal board for unit
transmission wiring.
■ After connection
Attach the small sealing (supplied with the unit) around the
cables to prevent infiltrating of water from the outside into the
unit. If two or more cables are used, divide the small sealing into
the required number of pieces and wrap them around all the
cables.
Precautions
1 Observe the notes mentioned below when wiring to the power
supply terminal board.
• 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. (tightening torque 1.31 N•m ±10 %)
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.
Model Hz Volts Voltage range
FXFQ20~125 50 230 min. 198-max. 264
power supply Fan motor
Model MCA MFA KW FLA
FXFQ20~50 0.5 16 A 0.045 0.4
FXFQ63 0.6 16 A 0.045 0.5
FXFQ80 1.0 16 A 0.090 0.8
FXFQ100 1.1 16 A 0.090 0.9
FXFQ125 1.4 16 A 0.090 1.1
NOTE
For details, refer to "Electrical data".
Power supply wiring
Model Field fuses Wire Size
FXFQ20~125 16 A H05VV-U3G Local codes
Transmission wiring
Model Wire Size
FXFQ20~125 Sheathed wire (2)
0.75-1.25 mm
2
NOTE
■ For details, refer to the chapter "Wiring example".
■ Allowable length of transmission wiring between
indoor and outdoor units, and between the indoor
unit and the remote controller is as follows:
• Outdoor unit - indoor unit: max. 1000 m
(total wiring length: 2000 m)
• Indoor unit - remote controller: max 500 m
1 Switch box lid (1)
2 Power supply
3 Power supply terminal board
4 Rubber bush A
5 Clamp A
6 Switch box lid (2) with wiring diagram label
7 Transmission wiring
8 Ter minal board for transmission wiring
9 Rubber bush B
10 Clamp B
11 Outside of the unit
12 Inside of the unit
13 Cable (power supply or transmission wiring)
14 Opening for the cable
15 Small sealing
To Next Page
Loading...
