Precautions for Servicing A/C System (HFC-134a Refrigerant)
Precautions: Precautions for HVAC · A/C System Caution · Precautions for Servicing A/C System (HFO-1234yf Refrigerant) · General safety (00)
Handling HFC-134a (R-134a) Refrigerant and Specified Compressor Oil
WARNING:
•If HFC-134a (R-134a) is exposed to high temperatures, it turns into a poisonous gas.
Take the following precautions to prevent health problems caused by HFC-134a (R-134a) gas.
Avoid contact with HFC-134a (R-134a) refrigerant and wear goggles and gloves whenever handling the refrigerant. Should the refrigerant happen to contact your eyes or skin, immediately take action as described below to prevent aggravating the condition:
Take the following precautions to prevent health problems caused by HFC-134a (R-134a) gas.
—Do not handle refrigerant in or near any area where welding or steam cleaning is performed.
—Keep refrigerant in a cold and dark place. Avoid storing it under direct sunlight, in a place close to fire or inside a vehicle.
—If HFC-134a (R-134a) is burned, avoid breathing fumes.
•Contact of liquid HFC-134a (R-134a) refrigerant with skin and eyes will cause frostbite. The refrigerant cools the surface coming in contact with it to a temperature much lower than the freezing point of water.—Keep refrigerant in a cold and dark place. Avoid storing it under direct sunlight, in a place close to fire or inside a vehicle.
—If HFC-134a (R-134a) is burned, avoid breathing fumes.
Avoid contact with HFC-134a (R-134a) refrigerant and wear goggles and gloves whenever handling the refrigerant. Should the refrigerant happen to contact your eyes or skin, immediately take action as described below to prevent aggravating the condition:
—In the event of eye contact, do not touch the eye with your hand. Instead, pour fresh cold water over the eye to raise gradually the temperature. After washing the eye thoroughly with water, receive medical attention as soon as possible.
—If liquid HFC-134a (R-134a) contacts your skin, wash the affected area thoroughly with water. Since the skin may have been frostbitten, receive medical attention.
—If liquid HFC-134a (R-134a) contacts your skin, wash the affected area thoroughly with water. Since the skin may have been frostbitten, receive medical attention.
NOTE:
•Do not discharge HFC-134a (R-134a) refrigerant into atmosphere.
•The specified compressor oil for HFC-134a (R-134a) is highly hygroscopic. Keep internal parts of air conditioning free from moisture and dirt. When disconnecting any line from system, install a blind plug or cap to the fitting immediately.
•If pipes or hoses are replaced, replenish A/C compressor with specified amount of compressor oil from suction side referring to “Replenishing Compressor Oil” in “Operation Procedure for Refrigerant Charge”.
•The specified compressor oil for HFC-134a (R-134a) is highly hygroscopic. Keep internal parts of air conditioning free from moisture and dirt. When disconnecting any line from system, install a blind plug or cap to the fitting immediately.
•If pipes or hoses are replaced, replenish A/C compressor with specified amount of compressor oil from suction side referring to “Replenishing Compressor Oil” in “Operation Procedure for Refrigerant Charge”.
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—Automatic type:
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Handling A/C Cycle Parts and Tooling
NOTE:
•Route drain hose so that drained water does not adhere to vehicle components.
•When connecting hoses and pipes, apply a few drops of compressor oil (refrigerant oil) to O-ring.
•Replace O-ring with new one, once hoses, pipes or parts are disconnected.
•Check local governmental regulations regarding working with refrigerator systems and its tooling.
•When connecting hoses and pipes, apply a few drops of compressor oil (refrigerant oil) to O-ring.
•Replace O-ring with new one, once hoses, pipes or parts are disconnected.
•Check local governmental regulations regarding working with refrigerator systems and its tooling.
Refrigerant Recovery
When discharging refrigerant out of A/C system, always recover it using refrigerant recovery and recycling equipment because discharging HFC-134a (R-134a) refrigerant into atmosphere would cause adverse effect to environment. For the method, refer to “Recovery” in “Operation Procedure for Refrigerant Charge”.
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•Automatic type:
•Automatic type:
Refrigerant Charge
After performing compressor oil replenishment and evacuation, charge the A/C system with a proper amount of refrigerant referring to “Charge” in “Operation Procedure for Refrigerant Charge”.
•Manual type:
•Automatic type:
•Automatic type: