En-8
Pipe connection
5. 4. 3.
CAUTION
Be sure to install the pipe against the port on the indoor unit and the outdoor unit cor-
rectly. If the centering is improper, the
fl
are nut cannot be tightened smoothly.
If the
fl
are nut is forced to turn, the threads will be damaged.
Do not remove the
fl
are nut from the outdoor unit pipe until immediately before connect-
ing 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.
(1) Detach the caps and plugs from the pipes.
(2) Center the pipe against the port on the outdoor unit, and then turn the
fl
are nut by hand.
(3) Tighten the
fl
are nut of the connection pipe at the outdoor unit valve connector.
(4) After tightening the
fl
are nut by hand, use a torque wrench to fully tighten it.
3-way valve (Liquid)
3-way valve
(Gas)
Connection pipe
(Liquid)
Flare nut
Connection
pipe (Gas)
Flare nut
CAUTION
Hold the torque wrench at its grip, keeping it in a right angle with the pipe, in order to
tighten the
fl
are nut correctly.
Outer panel may be distorted if fastened only with a wrench. Be sure to
fi
x the el-
•
ementary 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.
Blank cap
Flare nut
90°
Torque wrench
Holding
wrench
Torque wrench
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)
In the case of AJ*A54LALH
It is necessary to change a connection pipe diameter by using Reducer.
•
(1) Reducer must be brazed in the outside of the outdoor unit.
(2) Distance between 3-way-valve and reducer
≤
1m
(3) The part of Reducer do insulation processing after brazing.
Connection pipe (Gas)
(Pipe outside dia.:19.05mm (3/4 in.))
Brazing
1m or less
Reducer
(accessory)
Connection pipe (Gas)
(Pipe outside dia.:15.88mm (5/8 in.))
Example. Case of front connection
Handling precautions for the valves
5. 4. 4.
Mounted part of Blank cap is sealed for protection.
•
Fasten blank cap tightly after opening valves.
•
Operating the valves
Use a hexagon wrench (size 4mm).
•
Opening (1)
Insert
the
hexagon
wrench
into the valve shaft, and turn it
•
counterclockwise.
(2) Stop turning when the valve shaft can no longer be turned.
(Open
position)
Closing (1)
Insert
the
hexagon
wrench
into the valve shaft, and turn it
•
clockwise.
(2) Stop turning when the valve shaft can no longer be turned.
(Closed
position)
Opening direction
Hexagon wrench
Seal (blank cap
installation portion)
Liquid pipe
Gas pipe
Opening direction
ELECTRICAL WIRING
6.
The precautions of electrical wiring
6. 1.
WARNING
Wiring connections must be performed by a quali
fi
ed person in accordance with
speci
fi
cations.
The rated supply of this product is 50Hz, 230V of 1-phase, 2-cable. Use a voltage
within the range of 198-264V.
Before connecting the cables, make sure the power supply is OFF.
Select a breaker (Included with earth leakage circuit breaker) of appropriate capacity
and install one at every power supply of an outdoor unit. Wrong selection of breakers
or transition wiring will lead to electric shock and
fi
re.
Do not connect AC power supply to the transmission line terminal board.
Improper wiring can damage the entire system.
Install a breaker (Included with earth leakage circuit breaker) in accordance with the
related laws and regulations.
Connect the connector cord securely to the terminal.
Faulty installation can cause a
fi
re.
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 elec-
tric parts for 10 minutes due to the risk of electric shock.
Make sure to perform grounding work. Improper grounding work can cause electric
shocks.
Always use a separate power supply line protected by a circuit breaker operating on
all cables with a distance between contact of 3mm for this unit.
Do not modify power cable, use extension cable or branch wiring. Improper use may
cause electric shock or
fi
re by poor connection, insuf
fi
cient insulation or over current.
Use crimp-type terminals and tighten the terminal screws to the speci
fi
ed torques,
otherwise, abnormal overheating may be produced and possibly cause serious dam-
age inside the unit.
Securely install the electrical box cover on the unit. An improperly installed service
panel can cause serious accidents such as electric shock or
fi
re through exposure to
dust or water.
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