Electrical Wiring; Electrical Requirement; Wiring Method - Fujitsu AirStage AG A012GCGH Series Installation Manual

5. ELECTRICAL WIRING

Electrical work must be performed in accordance with this manual by a person certified
under the national or regional regulations. Be sure to use a dedicated circuit for the unit.
An insufficient power supply circuit or improperly performed electrical work can cause
serious accidents such as electric shock or fire.
Before starting work, check that power is not being supplied to the all units.
Use the included connection cables and power cables or ones specified by the
manufacturer. Improper connections, insufficient insulation, or exceeding the allowable
current can cause electric shock or fire.
For wiring, use the prescribed type of cables, connect them securely, making sure that
there are no external forces of the cables applied to the terminal connections. Improp-
erly connected or secured cables can cause serious accidents such as overheating the
terminals, electric shock, or fire.
Do not modify the power cables, use extension cables, or use any branches in the
wiring. Improper connections, insufficient insulation, or exceeding the allowable current
can cause electric shock or fire.
Match the terminal board numbers and connection cable colors with those of the out-
door 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 fire.
Always fasten the outside covering of the connection cable with the cable clamp. (If the
insulator is chafed, electric discharge may occur.)
Securely install the electrical box cover on the unit. An improperly installed electrical box
cover can cause serious accidents such as electric shock or fire through exposure to
dust or water.
Install sleeves into any holes made in the walls for wiring. Otherwise, a short circuit
could result.
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 fire
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 firmly to the terminal board. Imperfect installation may
cause a fire.
If the supply cable is damaged, it must be replaced by the manufacturer, its service
agent or similarly qualified 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 cable to the transmission or remote controller terminals,
as this will damage the product.
Never bundle the power supply cable and transmission cable, remote controller 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 earth (ground) for the indoor and outdoor units and peripheral devices.
• Cut power (breaker) off.
• Touch metal part of the indoor units for more than 10 seconds to discharge static
electricity charged in the body.
• Do not touch terminals of parts and patterns implemented on PCB.

5.1. Electrical requirement

• Select the power cable type and size in
accordance with relevant local and nation-
al regulations.
• Specifications 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.
Breaker should be installed at every refrigerant system. Do not use a breaker in a different
refrigerant system.
Refer to the table for the breaker specifications 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.
WARNING
CAUTION
Voltage rating 230 V
Operating
198 to 264 V (50 Hz)
198 to 253 V (60 Hz)
range
A. Current breaker requirements
Model MCA MFA
AG*A004GCGH 0.16 A
AG*A007GCGH 0.17 A
AG*A009GCGH 0.18 A
AG*A012GCGH 0.22 A
AG*A014GCGH 0.28 A
20 A
AG*E004GCEH 0.16 A
AG*E007GCEH 0.17 A
AG*E009GCEH 0.18 A
AG*E012GCEH 0.22 A
AG*E014GCEH 0.28 A
B. Earth leakage breaker requirements
Maximum connect-
able "indoor units"
Breaker capacity
or "indoor units +
RB units" (*1)
30 mA, 0.1 sec or less 44 or less
100 mA, 0.1 sec or less 45 to 148 (*2)
5.1.1 Cable specifi cations
Recommended
cable size (mm²)
Power supply cable 2.5
Transmission cable 0.33
Remote controller
0.33 to 1.25
cable (2-wire type)
*1: Use shielded cable in accordance with local rules for remote controller cable.

5.2. Wiring method

Example
Outdoor unit or RB unit *1
Transmission
Indoor unit
Remote
Transmission
control
Power supply *2
Breaker
*3
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 an earth (ground) cable.
*3: The 3-wire type remote controller is not used.
(Crossover wiring of power supply)
Indoor unit
Power supply Power supply
Pull box
Breaker
Power supply
• MCA: Minimum Circuit Ampacity
• MFA: Maximum Fuse Ampacity
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.
*1: Heat pump type: indoor units,
Heat recovery type: indoor units
and RB units.
*2: If the 100 mA capacity breaker is
not provided, split the quantity of
the indoor units into small groups
of 9 units or less and provide a
breaker with capacity of 30 mA for
each group.
Cable type Remark
Type245 IEC57
2 Cable + earth (ground)
or equivalent
LONWORKS® 22 AWG LEVEL 4 (NEMA)
compatible non-polar 2 core, twisted pair
cable solid core diameter 0.65 mm
Sheathed PVC Non-polar 2 core, twisted
cable *1 pair
Indoor unit Indoor unit
*2 *2
Breaker Breaker
*3
Remote controller
Remote controller
(Slave)
Indoor unit Indoor unit
Power supply
Pull box
*3
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