AirStage ASUB24RLAV Manuale di installazione - Pagina 7
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6. ELECTRICAL WIRING
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Electrical work must be performed in accordance with this Manual by a person certifi ed
under the national or regional regulations. Be sure to use a dedicated circuit for the unit.
An insuffi cient power supply circuit or improperly performed electrical work can cause
serious accidents such as electric shock or fi re.
Before starting work, check that power is not being supplied to the indoor unit and
outdoor unit.
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.
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. Improperly connected or secured
cables can cause serious accidents such as overheating the terminals, electric shock, or fi re.
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 fi re.
Match the terminal board numbers and connection cable colors with those of the
outdoor 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.)
Securely install the electrical box cover on the unit. An improperly installed electrical
box cover can cause serious accidents such as electric shock or fi re through exposure
to dust or water.
Install sleeves into any holes made in the walls for wiring. Otherwise, a short circuit
could result.
For U.S.A. and Canada:
When installing this system in high humidity locations, install using ground fault equipment
breakers (often referred to in other countries as an ELCB earth leakage current breaker)
to reduce the risk of leaking current which result in electric shock or potential fi re.
For others:
Install an earth (ground) leakage breaker. In addition, install the earth (ground)
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 cord 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 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 1-31/32 in. (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 and outdoor 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.
1
6.1. Electrical requirement
Voltage rating
Operating range
• Select the power cable type and size in accordance with relevant local and national
regulations.
• Specifications for local wiring power cord and branch wiring are in compliance with local code.
• Select the correct cable type and size according to the country or region's
regulations.
• 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 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 unit to satisfy conditions A and B below.
A. Current breaker requirements
Model
MCA
ASUB18RLAV
0.40 A
ASUB24RLAV
0.63 A
MCA: Minimum Circuit Ampacity
MOP: Maximum Overcurrent Protection
WARNING
CAUTION
208/230 V
187 to 253 V
MOP (Fuse capacity)
20 A
When the power crossover wiring is done, make it so that the total of the MCA of the con-
nected indoor equipment does not exceed the 15 A.
B. Earth leakage breaker requirements
Breaker capacity
30 mA, 0.1 sec or less
100 mA, 0.1 sec or less
200 mA, 0.1 sec or less
If the number of units of connected indoor unit exceeds the upper limit, either add breakers
or use a breaker with large capacitance.
1
6.1.1 Transmission and remote controller wiring specifi cations
Follow the specifi cations below for the transmission and remote controller cable.
Cable size
22 AWG
Transmission cable
(0.33 mm²)
Remote control-
22 AWG
ler cable
(0.33 mm²)
1
6.2. Wiring method
EXAMPLE
Power supply
Breaker 1
Breaker 2
Outdoor unit
Transmission
Power supply
Indoor unit
Transmission
Power
Power
supply
supply
Remote
control
Breaker 2
Breaker 2
Breaker 1
Breaker 1
Remote
controller
(Master)
Power supply
Power supply
Crossover wiring of power supply
Indoor unit
Power
supply
Remote
control
Pull box
Breaker 2
Pull box
Breaker 1
Remote
controller
(Master)
Power supply
6.3. Unit wiring
Before attaching the cable to terminal block.
6.3.1. Power supply cable
For U.S.A. and Canada
Earth
(ground) wire
For Others
Earth
(ground) wire
Maximum connectable indoor unit
8
27
39 (Upper limit of the refrigerant system)
Wire type
Remarks
LEVEL 4 (NEMA)
non-polar 2 core, twisted
LONWORKS
pair solid core diam-
compatible cable
eter 1/32 in. (0.65 mm)
Polar 3 core
Sheathed PVC cable
Twisted pair
Breaker 1 : Earth leakage breaker
(GFEB)
Breaker 2 : Current breaker
(MOP breaker)
Indoor unit
Indoor unit
Transmission
Transmission
Power
Remote
supply
control
Breaker 2
Breaker 1
Remote
controller
(Slave)
Power supply
Indoor unit
Indoor unit
Power
Power
Remote
Remote
supply
supply
control
Remote
Remote
controller
controller
(Slave)
Conduit connector
6-7/8 in. (175 mm)
6-11/16 in. (170 mm)
Conduit holder
31/32 in. (25 mm)
1-3/8 in. (35 mm)
®
Remote
control
Remote
controller
control
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