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Safety precautions for Installation
Warning
The electrical cover of indoor unit or the service
board should be installed correctly.
If t�e cover and t�e service board are not installed well, fire or
·
electric shock may result due to entrance of water and dust.
Attached or specified parts should be used for
installation construction.
Improper parts may cause fire, electric s�ock, water leakage
·
or injury from machine falling.
For the power supply circuit, connection in the
middle section, extension of power cord or use of
multi-cable socket are not suggested.
Poor contact, poor insulation or overload may cause electric
·
shock.
Grounding construction shall be done.
The air conditioner socket shall be connected with special
·
earth wire. Electric shock may result from no grounding or poor
grounding.
Don't connect the earth wire to gas pipe, tap water pipe,
·
lightning rod or telephone earth wire.
Don't install the unit in a place where combustible
gas may leak.
In case the combustible gas leaks and accumulates around
·
the unit, explosion may result.
A leakage protector shall be installed.
If the leakage protector has not been installed, an electric
·
shock may result.
Be sure to implement drainage and piping
construction in terms of installation instructions.
If there are improper drainage and piping construction or
·
inclined indoor unit, furniture will be wet and contaminated by
water drop from indoor unit.
The connection wire from the middle section of
connection wire/signal connection line should not be
adopted.
Misoperation of the unit will occur, causing the unit not to
·
operate normally.
Please install the unit in terms of national rules of
wiring.
After installation construction, be sure to confirm
whether there are positions in which refrigerant gas
leakage occurs.
If the power cord is damaged, be sure to replace it
with special power cord or with special components
bought from manufacturer or service center.
Moreover, if you have no notion of something,
contact the specialty shop for help.
2.Atlention for R410A refrigerant systems
2-1 Using R410A refigerant air conditioners
Use C1220 copper phosphorus (for copper and
copper alloy seamless pipes) to connect the
refrigerant pipes. Make sure the insides of the
pipes are clean and do not contain any harmful
contaminants such as sulfuric compounds, oxi-
dants, debris, or dust. Use pipes with the specified
thickness.
Use ester oil, ether oil, alkylbenzene oil (small
amount) as the refrigeration oil applied to the
flared sections. If mineral oil is mixed in the refrig-
eration oil, oil deterioration may result.
Do not use refrigerant other than R410A refriger-
ant. If another refrigerant is used, the chlorine will
cause the oil to deteriorate.
Use the following tools specifically designed for
use with r410a REFRIGERANT. The following tools
are necessary to use R410A refrigerant. Contact
your nearest dealer for any questions.
Tools (for R410A)
Gauge manifold
Flare tool
Size adjustment gauge
Change hose
Vacuum pump adapter
Gas leak detector
Electronic refrigerant charging scale
Torque wrench
Be sure to use the correct tools. If dust, debris, or
moisture enters the refrigerant lines, refrigeration oil
deterioration may result.
Do not use a charging cylinder. If a charging cylinder
is used, the composition of the refrigerant will
change and the efficiency will be lowered.
2-2 Precautions for devices that use R410A
refrigerant
When installing or moving the air conditioner, use
only the specified refrigerant (R410A) to charge
the refrigerant lines. Do not mix it with any other
refrigerant and do not allow air to remain in the lines.
Air enclosed in the lines can cause pressure peaks
resulting in a rupture and other hazards.
MSZ-WG20/25VA-H1
Liquid pipes
9.52mm(Thickness 0.8mm)
Gas pipes
15.88mm(Thickness 1.0mm)
Do not use pipes thinner than those specified
above.
Do not share the vacuum pump with R22 refrigerant
systems.
17
Caution
Caution
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