Toshiba RAS-5M34U2AVG-E Service Manual page 4

New Refrigerant Air Conditioner Installation
• THIS AIR CONDITIONER ADOPTS THE NEW HFC REFRIGERANT (R32 WHICH DOES NOT
DESTROY OZONE LAYER.
R32 refrigerant is apt to be affected by impurities such as water, oxidizing membrane, and oils because the
working pressure of R32 refrigerant is approx. 1.6 times of refrigerant R22. Accompanied with the adoption of
the new refrigerant, the refrigeration machine oil has also been changed. Therefore, during installation work,
be sure that water, dust, former refrigerant, or refrigeration machine oil does not enter into the new type
refrigerant R32 air conditioner circuit.
To prevent mixing of refrigerant or refrigerating machine oil, the sizes of connecting sections of charging port
on main unit and installation tools are different from those used for the conventional refrigerant units.
Accordingly, special tools are required for the new refrigerant (R32) units. For connecting pipes, use new and
clean piping materials with high pressure fittings made for R32 only, so that water and/or dust does not enter.
Moreover, do not use the existing piping because there are some problems with pressure fittings and
possible impurities in existing piping.
TO DISCONNECT THE APPLIANCE FROM THE MAIN POWER SUPPLY
This appliance must be connected to the main power supply by means of a circuit breaker or a switch with
a contact separation of at least 3 mm in all poles.
• The manufacturer shall not assume any liability for the damage caused by not observing the
description of this manual.
• Ask an authorized dealer or qualified installation professional to install/maintain the air conditioner.
INAPPROPRIATE SERVICING MAY RESULT IN WATER LEAKAGE, ELECTRIC SHOCK OR FIRE.
•
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.
DANGER: HIGH VOLTAGE
The high voltage circuit is incorporated. Be careful to do the check service, as the electric shock may be
caused in case of touching parts on the P .C. board by hand.
• CORRECTLY CONNECT THE CONNECTING CABLE. IF THE CONNECTING CABLE IS INCORRECTLY CON-
NECTED, ELECTRIC PARTS MAY BE DAMAGED.
• CHECK THAT THE EARTH WIRE IS NOT BROKEN OR DISCONNECTED BEFORE SERVICE AND INSTALLA-
TION. FAILURE TO DO SO MAY CAUSE ELECTRIC SHOCK.
• DO NOT INSTALL NEAR CONCENTRATIONS OF COMBUSTIBLE GAS OR GAS VAPORS. FAILURE TO FOL-
LOW THIS INSTRUCTION CAN RESULT IN FIRE OR EXPLOSION.
• TO PREVENT THE INDOOR UNIT FROM OVERHEATING AND CAUSING A FIRE HAZARD, PLACE THE UNIT
WELL AWAY (MORE THAN 2 M) FROM HEAT SOURCES SUCH AS RADIATORS, HEAT RESISTORS, FUR-
NACE, STOVES, ETC.
• WHEN MOVING THE AIR-CONDITIONER FOR INSTALLATION IN ANOTHER PLACE, BE VERY CAREFUL NOT
TO ALLOW THE SPECIFIED REFRIGERANT (R410A) TO BECOME MIXED WITH ANY OTHER GASEOUS
BODY INTO THE REFRIGERATION CIRCUIT. IF AIR OR ANY OTHER GAS IS MIXED IN THE REFRIGERANT,
THE GAS PRESSURE IN THE REFRIGERATION CIRCUIT WILL BECOME ABNORMALLY HIGH AND IT MAY
RESULT IN THE PIPE BURSTING AND POSSIBLE PERSONNEL INJURIES.
• IN THE EVENT THAT THE REFRIGERANT GAS LEAKS OUT OF THE PIPE DURING THE SERVICE WORK AND
THE INSTALLATION WORK, IMMEDIATELY LET FRESH AIR INTO THE ROOM. IF THE REFRIGERANT GAS IS
HEATED, SUCH AS BY FIRE, GENERATION OF POISONOUS GAS MAY RESULT.
CAUTION
CAUTION
DANGER
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FILE NO. SVM-18053