En-3
Pipe outside
diameter [mm (in.)]
Dimension A (mm)
Dimension B 0
- 014
[mm]
Flare tool for R410A,
clutch type
6.35 (1/4)
0 to 0.5
9.1
9.52 (3/8)
13.2
12.70 (1/2)
16.6
15.88 (5/8)
19.7
19.05 (3/4)
24.0
When using conventional flare tools to flare R410A pipes, the dimension A should be
•
approximately 0.5mm more than indicated in the table (for flaring with R410A flare tools) to
achieve the specified flaring. Use a thickness gauge to measure the dimension A.
Pipe outside diameter
[mm (in.)]
Width across flatsof Flare nut
[mm]
6.35 (1/4)
17
9.52 (3/8)
22
12.70 (1/2)
26
15.88 (5/8)
29
19.05 (3/4)
36
Width across flats
Bending pipes
41 11 11
CAUTION
To prevent breaking of the pipe, avoid sharp bends. Bend the pipe with a radius of
curvature of 100mm or more.
If the pipe is bent repeatedly at the same place, it will break.
If pipes are shaped by hand, be careful not to collapse them.
•
Do not bend the pipes at an angle of more than 90°.
•
When pipes are repeatedly bent or stretched, the material will harden, making it difficult to
•
bend or stretch them any more.
Do not bend or stretch the pipes more than 3 times.
•
Pipe connection
41 11 21
CAUTION
Be sure to install the pipe against the port on the indoor unit and the outdoor unit
correctly. If the centering is improper, the flare nut cannot be tightened smoothly.
If the flare nut is forced to turn, the threads will be damaged.
Do not remove the flare nut from the outdoor unit pipe until immediately before
connecting the connection pipe.
After installing the piping, make sure that the connection pipes do not touch the
compressor or outer panel. If the pipes touch the compressor or outer panel, they will
vibrate and produce noise.
Detach the caps and plugs from the pipes.
(
1
)
Center the pipe against the port on the outdoor unit, and then turn the flare nut by hand.
(
2
)
To prevent gas leakage, coat the flare
surface with alkylbenzene oil (HAB).
Do not use mineral oil.
Attach the connection
(
3
)
pipe.
Flare nut
Connection
pipe (Liquid)
Connection pipe (Gas)
Flare nut
3-way valve (Gas)
2-way valve
(Liquid)
When the flare nut is
(
4
)
tightened properly by your
hand, use a torque wrench
to finally tighten it.
Holding spanner
Torque wrench
Body side
CAUTION
Hold the torque wrench at its grip, keeping it in a right angle with the pipe, in order to
tighten the flare nut correctly.
Outer panel may be distorted if fastened only with a wrench. Be sure to fix the elementary
•
part with a holding wrench (spanner) and fasten with a torque wrench (refer to below
diagram). Do not apply force to the blank cap of the valve or hang a wrench, etc., on the
cap. If blank cap is broken, it may cause leakage of refrigerant.
Flare nut [mm (in.)]
Tightening torque [N·m (kgf·cm)]
6.35 (1/4) dia.
16 to 18 (160 to 180)
9.52 (3/8) dia.
32 to 42 (320 to 420)
12.70 (1/2) dia.
49 to 61 (490 to 610)
15.88 (5/8) dia.
63 to 75 (630 to 750)
19.05 (3/4) dia.
90 to 110 (900 to 1100)
HOW TO USE ADAPTER (Connection ports of outdoor unit)
41 11 21
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 type [mm]
Tightening torque [N·m (kgf·cm)]
ø12.7 → ø9.52
49 to 61 (490 to 610)
ø12.7 → ø15.88
49 to 61 (490 to 610)
ELECTRICAL WIRING
31
The precautions of electrical wiring
31 11
WARNING
Wiring connections must be performed by a qualified person in accordance with
specifications.
The rated supply of this product is 50Hz, 230V. Use a voltage within the range of
198-264V.
Before connecting the wires, make sure the power supply is OFF.
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.
Be sure to install an earth leakage breaker. Otherwise, it 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 cable securely to the terminal.
Faulty installation can cause a fire.
Make sure to secure the insulation portion of the connector cable with the cable 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 5 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.
This system uses an inverter which means that it must be used an earth leakage
breaker that can handle harmonics in order to prevent malfunctioning of the earth
leakage breaker itself.
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.
9374872121-03_IM.indb 5
2/10/2555 10:07:55
