En-9
4. 1. 3. How to use adapter (Connection ports of outdoor unit)
• When using the ADAPTER, be careful not to overtighten the nut, or the smaller pipe
may be damaged.
•
Apply a coat of refrigeration oil to the threaded connection port of the outdoor unit
where the flare nut comes in.
•
Use appropriate wrenches to avoid damaging the connection thread by
overtightening the flare nut.
• Apply wrenches on both of flare nut (local part), and ADAPTER to tighten them.
Adapter tightening torque
Adapter type [in. (mm)]
Tightening torque [lbf·ft. (N·m)]
ø1/2 (ø12.70) → ø3/8 (ø9.52)
36.1 to 45.0 (49 to 61)
ø1/2 (ø12.70) → ø5/8 (ø15.88)
36.1 to 45.0 (49 to 61)
5. ELECTRICAL WIRING
WARNING
Wiring connections must be performed by a qualified person in accordance with
specifications.
The rated supply of this product is 60Hz, 208/230V. Use a voltage within the range of
187-253V.
Before connecting the wires, make sure the power supply is OFF.
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 may result in electric
shock or potential fire.
Be sure to install a breaker of the specified capacity.
When selecting breaker, please comply with the laws and the regulations of each
country.
One breaker must be installed on the power supply of the outdoor unit.
Wrong selection and setup of the breaker will cause electric shock or fire.
Do not connect AC power supply to the transmission line terminal board.
Improper wiring can damage the entire system.
Connect the connector cord securely to the terminal.
Faulty installation can cause a fire.
Make sure to secure the insulation portion of the connector cable with the cord clamp.
A damaged insulation can cause a short circuit.
Never install a power factor improvement condenser. Instead of improving the power
factor, the condenser may overheat.
Before servicing the unit, turn the power supply switch OFF. Then, do not touch
electric parts for 10 minutes due to the risk of electric shock.
Make sure to perform grounding work. Improper grounding work can cause electric
shocks.
CAUTION
The primary power supply capacity is for the air conditioner itself, and does not include
the concurrent use of other devices.
Do not use crossover power supply wiring for the outdoor unit.
If the electrical power is inadequate, contact your electric power company.
Install a breaker in a location that is not exposed to high temperatures.
If the temperature surrounding the breaker is too high, the amperage at which the
breaker cuts out may decrease.
We suggest installing GFEB [Ground Fault Equipment Breaker] or follow local
electrical code.
This system uses an inverter, which means that when used with a ground fault breaker
you must use breakers that can handle harmonics such as a GFEB (30 mA or greater)
in order to prevent malfunctioning of ground fault device.
When the electrical switchboard is installed outdoors, place it under lock and key so
that it is not easily accessible.
Do not fasten the power supply cable and connection cable together.
Always keep to the maximum length of the connection cable. Exceeding the maximum
length may lead to erroneous operation.
The static electricity that is charged to the human body can damage the control PC
Board when handling the control PC Board for address setting, etc.
Please keep caution to the following points.
Provide the grounding of Indoor unit, Outdoor unit and Option equipment.
Cut off the power supply (breaker).
Touch the metal section (such as the unpainted control box section) of the indoor or
outdoor unit for more than 10 seconds. Discharge the static electricity in your body.
Never touch the component terminal or pattern on the PC Board.
5. 1. Electrical requirement
CAUTION
Be sure to install a breaker of the specified capacity.
Regulation of cables and breaker differs from each locality, refer in accordance with
local rules.
Voltage rating
1Φ 208/230V (60Hz)
Operating range
187-264V
Cable
Conduit cable size
*1)
Remarks
Power supply cable
36/24 type 10AWG
2 cable + Ground, 1 Ø 208/230V
18 type 12AWG
Connection cable
14AWG
3 cable + Ground, 1 Ø 208/230V
1) Selected sample: 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.
Breaker
Specification
*
2)
Circuit breaker
36/24 type Current : 30(A)
18 type
Current : 20(A)
Earth leakage breaker
Leakage current : 30mA 0.1sec or less *
3)
2) Select the appropriate breaker of the described specification according to the national
or regional standards.
3) Select the breaker that enough load current can pass through it.
5. 2. Unit wiring
• When stripping off the coating of a lead wire, always use a special tool such as a wire
stripper. If there is no special tool available, carefully strip the coating with a knife etc.
1-3/16 in. (30 mm)
1-15/16 in.(50 mm)
Earth wire
Power supply cable
and connection cable
How to connect wiring to the terminal
Caution when wiring cable
(1) Use ring type terminals with insulating sleeves as shown in the figure to connect to
the terminal block.
(2) Securely clamp the ring type terminals to the wires using an appropriate tool so that
the wires do not come loose.
(3) Use the specified wires, 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 damaged 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 below for the terminal screw tightening torques.
Sleeve
Strip : 3/8 in. (10 mm)
Ring type terminal
Wire
Screw with special washer
Ring type terminal
Terminal blocks
Screw with special washer
Wire
Ring type terminal
Tightening torque [lbf·in. (N·m)]
M4 screw
10.6 to 15.9 (1.2 to 1.8)
9374747153_IM.indb 9
2014/12/19 14:57:18
