Mitsubishi Electric R410A Operating And Installation Instructions page 45

Safety precautions for Installation
Warning
Attached or specified parts should be used for installation
construction.
Improper parts may cause fire, electric shock, 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.
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.
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.
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
Caution
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, oxidants, 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 refrigeration oil, oil deteriora-
tion may result.
Do not use refrigerant other than R410A refrigerant. 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 nec-
essary 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-YE18VA-H1
Liquid pipes 6.35mm(Thickness 0.8mm)
Gas pipes
12.7mm(Thickness 0.8mm)
Do not use pipes thinner than those specified above.
Do not share the vacuum pump with R22 refrigerant
systems.
44
Caution