Safety Precautions - Carrier 42cvur018-703 Service Manual

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Before insallation, please read these precautions for safety carefully.
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Be sure to follow the precautions provided here to avoid safety risks. The symbols and their meanings
are shown below.
WARNING : It indicates that incorrect use of this unit may cause severe injury or death.
CAUTION : It indicates that incorrect use of this unit may cause personal injury (*1), or property damage (*2).
*1 : Personal injury means a slight accident, burn, or electrical shock which dose not require
admission or repeated hospital treatmint.
*2 : Property damage means geater damage which affects addets or resources.
For general public use
Power supply cord of parts of appliance for outdoor use shall be at least polychloroprene sheathed flexible
cord (design H07RN-F) or cord designation 60245 IEC66 (1.5 mm2 or more). (Shall be insalled in accordance with
national regulations.)
CAUTION
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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 he adoption of this new refrigerant,
refrigerating oil has also been changed. Therefore, during installation work, be sure that water, dust, former
refrigerant, 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 naterials with highpressure 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.
DANGER
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FOR USE BY QUALIFIED PERSONS ONLY.
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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.
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CONNECT THE CONNECTING CABLE CORRECTLY. IF THE CONNECTING CABLE IS CONNECTED WRONGLY,
ELECTRIC PARTS MAY BE DAMAGED.
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CHECK THE EARTH WIRE THAT IT IS NOT BROKEN OR DISCONNECTED BEFORE INSALLATION.
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DO NOT INSTALL NEAR CONCENTRATIONS OF COMBUSTIBLE GAS OR GAS VAPORS.
FAILURE TO FOLLOW THIS INSTRUCTION CAN RESULT IN FIRE OR EXPLOSION.
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TO PREVENT OVERHEATING HE 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.
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WHEN MOVING THE AIR CONDITIONER FOR INSTALLING IT IN ANOTHER PLACE AGAIN, BE VERY CAREFUL
NOT TO GET THE SPECIFIED REFRIGERANT (R22) 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 RESULTINGLY CAUSES BURST OF
THE PIPE AND INJURIES ON PERSONS.
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IN THE EVENT THAT THE REFRIGERANT GAS LEAKS OUT OF THE PIPE DURING THE INSTALLATION WORK,
IMMEDIAELY LET FRESH AIR INTO THE ROOM. IF THE REFRIGERANT GAS IS HEATED BY FIRE OR
SOMETHING ELSE, IT CAUSES GENERATION OF POISONOUS GAS.

1. SAFETY PRECAUTIONS

New refrigerant air conditioner installation
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FILE NO. SVM-12052