Electrical Requirement; Cable Specifi Cations; Wiring Method - Fujitsu Airstage ARXB07GALH Manual De Instalación

Use the included connection cables and power cables or ones specified by the
manufacturer. Improper connections, insuffi cient insulation, or exceeding the allowable
current can cause electric shock or fi re.
Do not modify the power cables, use extension cables, or use any branches in the
wiring. Improper connections, insuffi cient insulation, or exceeding the allowable current
can cause electric shock or fi re.
Match the terminal block numbers and connection cable colors with those of the
outdoor unit (or RB unit). Erroneous wiring may cause burning of the electric parts.
Securely connect the connection cables to the terminal board. In addition, secure the
cables with wiring holders. Improper connections, either in the wiring or at the ends of
the wiring, can cause a malfunction, electric shock, or fi re.
Always fasten the outside covering of the connection cable with the cable clamp. (If the
insulator is chafed, electric discharge may occur.)
Install an earth leakage breaker. In addition, install the earth leakage breaker so that
the entire AC main power supply is cut off at the same time. Otherwise, electric shock
or fi re could result.
Always connect the earth (ground) cable.
Improper earthing (grounding) work can cause electric shocks.
Install the remote controller cables so as not to be direct touched with your hand.
Perform wiring work in accordance with standards so that the air conditioner can be
operated safely and positively.
Connect the connection cable fi rmly to the terminal board. Imperfect installation may
cause a fi re.
If the supply cable is damaged, it must be replaced by the manufacturer, its service
agent or similarly qualifi ed persons in order to avoid a hazard.
Earth (Ground) the unit.
Do not connect the earth (ground) cable to a gas pipe, water pipe, lightning rod, or a
telephone earth (ground) cable.
Improper earthing (grounding) may cause electric shock.
Do not connect power supply cables to the transmission or remote controller terminals,
as this will damage the product.
Never bundle the power supply cable and transmission cable, remote control cable
together.
Separate these cable by 50 mm or more.
Bundling these cables together will cause miss operation or breakdown.
When handling PCB, static electricity charged in the body may cause malfunction of
the PCB. Follow the cautions below:
• Establish an earthing (grounding) for the indoor and outdoor units and peripheral
devices.
• Cut power (breaker) off.
• Touch metal part of the indoor unit for more than 10 seconds to discharge static
electricity charged in the body.
• Do not touch terminals of parts and patterns implemented on PCB.

6.1. Electrical requirement

Voltage rating
Operating range
• Select the power cable type and size in accordance with relevant local and national
regulations.
• Specifi cations for local wiring power cord and branch wiring are in compliance with local
code.
• Max. wire length: Set a length so that the voltage drop is less than 2%. Increase the
wire diameter when the wire length is long.
Refer to the table for the breaker specifi cations of each installation condition. Perform the
power crossover wiring within the range of the same refrigerant system. When the crossover
wiring is done, make a connection for indoor units to satisfy conditions A and B below.
A. Current breaker requirements
Model MCA
ARXB07GALH 0.29 A
ARXB09GALH 0.30 A
ARXB12GALH 0.36 A
ARXB14GALH 0.48 A
ARXB18GALH 0.51 A
MCA: Minimum Circuit Ampacity
MFA: Main Fuse Ampacity
9374342280-01_IM.indb Sec1:10 9374342280-01_IM.indb Sec1:10
CAUTION
230 V
198 to 264 V
MFA
20 A
When the power crossover wiring is done, make it so that the total of the MCA of the
connected RB units and indoor units does not exceed the 15 A. For RB unit MCA, refer to
the RB unit installation manual.
If the capacity of connected RB units and indoor units exceeds the upper limit, either add
breakers or use a breaker with a greater capacity.
B. Earth leakage breaker requirements
* Maximum connectable "indoor units" or
Breaker capacity
30 mA, 0.1 sec or less
100 mA, 0.1 sec or less
* Heat pump type: indoor units, Heat recovery type: indoor units and RB units.
** If the total number of units connected to the breaker exceeds 44, either add a 30mA
breaker, or use breakers with a greater capacity.
6.1.1. Cable specifi cations
Follow the specifi cations below for the power supply, transmission and remote controller
cable.
Recommended
cable size
2
(mm )
Power supply Type245 IEC57 or
2.5
cable equivalent
Transmission LONWORKS
0.33
cable compatible cable
Remote controller
cable 0.33 to 1.25 Sheathed PVC cable* Non polar 2 core
(2-wire type)
Remote controller
cable 0.33 Sheathed PVC cable* Polar 3 core
(3-wire type)
*: Use shielded cable in accordance with local rules for remote controller cable.

6.2. Wiring method

EXAMPLE
Outdoor unit or RB unit *1
Transmission
Indoor unit
Remote
Transmission
control
Power supply
*2
*3
Breaker Breaker
Power supply Remote controller
(Master)
*1: When connecting to the Heat Recovery System, refer to the installation manual of
the RB unit.
*2: Earth (Ground) the remote controller if it has a earth (ground) cable.
*3: When connecting the 2-wire type remote controller, Y3 is not used.
(Crossover wiring of power supply)
Indoor unit
Power supply Power supply
Pull box
Breaker
Pull box
Power supply
* Earth (Ground) the remote controller if it has an earth (ground) wire.
Connect the earth (ground) wire of the remote controller to the earth (ground) terminal
of transmission.
"indoor units + RB units"
44 or less **
45 to 128
Cable type Remark
1ø 50 Hz 198 to 264 V
2 Cable + earth (ground)
22 AWG LEVEL 4
(NEMA) non-polar 2 core,
twisted pair solid core
diameter 0.65 mm
Indoor unit Indoor unit
*2
*2
*3
*3
Breaker
Remote controller Remote controller
(Slave)
Indoor unit Indoor unit
Power supply
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