Wiring Method; Unit Wiring - Fujitsu AIRSTAGE AUXB004GLEH Installation Manual

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.
A. Current breaker requirements
MCA: Minimum Circuit Ampacity
Model MCA MFA
MFA: Maximum Fuse Ampacity
AUXB004GLEH 0.20 A When the power crossover wiring is done, make it
so that the total of the MCA of the connected RB
AUXB007GLEH 0.20 A
units and indoor units does not exceed the 15 A.
AUXB009GLEH 0.20 A For RB unit MCA, refer to the RB unit installation
manual.
AUXB012GLEH 0.24 A 20 A
If the capacity of connected RB units and indoor
AUXB014GLEH 0.29 A units exceeds the upper limit, either add breakers
or use a breaker with a greater capacity.
AUXB018GLEH 0.30 A
AUXB024GLEH 0.75 A
B. Ground Fault Equipment Breaker requirements
* Maximum connectable "indoor units" or "indoor
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 100 mA capacity breaker is not provided, split the quantity of the indoor units into
small groups of 44 units or less and provide a breaker with capacity of 30 mA for each
group.
6.1.1. Cable specifications
Recommended
2
cable size (mm )
Power supply
2.5
cable
Transmission
0.33
cable
Remote control-
ler cable (2-wire 0.33 to 1.25
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
*2
Power supply
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
units + RB units"
44 or less
45 to 148 **
Cable type Remark
Type60245 IEC57 or 2 Cable + earth
equivalent (ground)
22 AWG LEVEL 4
LONWORKS com- (NEMA) non-polar 2
patible cable core, twisted pair solid
core diameter 0.65 mm
Sheathed PVC Non-polar 2 core,
cable* twisted pair
Indoor unit Indoor unit
*2 *2
Breaker
Breaker
*3
Remote controller
Remote controller
(Slave)
Indoor unit Indoor unit
Power supply
Pull box

6.3. Unit wiring

Before attaching the cable to terminal block.
6.3.1. Power supply cable
Adjust the length of power supply
cable to avoid excessive tension
with referring the figure.
A. For solid core wiring
(1) To connect the electrical terminal, follow the below diagram and connect after looping
it around the end of the cable.
(2) Use the specified cables, connect them securely, and fasten them so that there is no
stress placed on the terminals.
(3) Use an appropriate screwdriver to tighten the terminal screws.
Do not use a screwdriver that is too small, otherwise, the screw heads may be dam-
aged and prevent the screws from being properly tightened.
(4) Do not tighten the terminal screws too much, otherwise, the screws may break.
(5) See the table for the terminal screw tightening torques.
(6) Please do not fix 2 power supply cables with 1 screw.
Strip 25 mm
Screw with
special washer
Cable
Cable end (Loop)
When using solid core cables, do not use the ring terminal. If you use the solid core
cables with the ring terminal, the ring terminal's pressure bonding may malfunction and
cause the cables to abnormally heat up.
B. For strand wiring
(1) Use ring terminals with insulating sleeves as shown in the figure below to connect to
the terminal block.
(2) Securely clamp the ring terminals to the cables using an appropriate tool so that the
cables do not come loose.
(3) Use the specified cables, connect them securely, and fasten them so that there is no
stress placed on the terminals.
(4) Use an appropriate screwdriver to tighten the terminal screws.
Do not use a screwdriver that is too small, otherwise, the screw heads may be dam-
aged and prevent the screws from being properly tightened.
(5) Do not tighten the terminal screws too much, otherwise, the screws may break.
(6) See the table for the terminal screw tightening torques.
(7) Please do not fix 2 power supply cables with 1 screw.
Strip 10 mm
Screw with
special washer
Cable
*3
Use ring terminals and tighten the terminal screws to the specified torques, otherwise,
abnormal overheating may be produced and possibly cause heavy damage inside the
unit.
M4 screw (Power supply /L, N, GND)
Earth (Ground) 20 mm
cable
50 mm
Terminal block
WARNING
Ring terminal
Ring terminal
Terminal block
WARNING
Tightening torque
1.2 to 1.8 N•m (12 to 18 kgf•cm)
Loop
Screw with
special washer
Cable end (Loop)
Cable
Sleeve
Screw with
special washer
Ring terminal
Cable
En-6