Toshiba RAS-3M18S3AV-E Installation Manual page 4

Outdoor Unit
New refrigerant air conditioner installation
THIS AIR CONDITIONER USES THE NEW HFC REFRIGERANT (R410A), WHICH DOES
NOT DESTROY THE OZONE LAYER.
R410A refrigerant is apt to be affected by impurities such as water, oxidizing membranes,
and oils because the pressure of R410A refrigerant is approx. 1.6 times of refrigerant R22.
As well as the adoption of this new refrigerant, refrigerating machine oil has also been
changed. Therefore, during installation work, be sure that water, dust, former refrigerant,
or refrigerating machine oil does not enter the refrigeration cycle of a new-refrigerant air
conditioner. To avoid mixing refrigerant and refrigerating machine oil, the sizes of charging
port connecting sections on the main unit are different from those for the conventional
refrigerant, and different size tools are also required. For connecting pipes, use new and
clean piping materials with high pressure withstand capabilities, designed for R410A only,
and ensure that water or dust does not enter. Moreover, do not use any existing piping as its
pressure withstand may be insufficient and may contain impurities.
• The manufacturer shall not assume any liability for the damage caused by not observing
the description of this manual.
• For use by qualified persons only.
• Means for disconnection from the supply having a contact separation of at least 3 mm in
all poles must be incorporated in the fixed wiring.
• Turn off main power supply before attempting any electrical work. Make sure all power
switches are off. Failure to do so may cause electric shock.
• Connect the connecting cables correctly. If the connecting cables are connected wrongly,
electric parts may be damaged.
• Check the earth wire that it is not broken or disconnected before installation.
• Do not install near concentrations of combustible gas or gas vapors. Failure to follow this
instruction can result in fire or explosion.
• To prevent overheating the indoor unit and causing a fire hazard, place the unit well away
(more than 2 m) from heat sources such as radiators, heaters, furnace, stoves, etc.
• When moving the air conditioner for installing it in another place again, be very careful
not to get the specified refrigerant (R410A) with any other gaseous body into the
refrigeration cycle. If air or any other gas is mixed in the refrigerant, the gas pressure in
the refrigeration cycle becomes abnormally high and it resultantly causes burst of the pipe
and injuries on persons.
• In the event that the refrigerant gas leaks out of the pipe during the installation work,
immediately let fresh air into the room. If the refrigerant gas is heated by fire or something
else, It causes generation of poisonous gas.
• When installing or re-installing the air conditioner, do not inject air or other substances
besides the designated refrigerant "R410A" into the refrigerating cycle.
If air or other substances are mixed, an abnormal pressure can occur in the refrigerating
cycle, and this can cause an injury due to a pipe rupture.
CAUTION
DANGER
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Installation Manual