Mazda CX-7 2007 Workshop Manual page 1145

07-10 REFRIGERANT SYSTEM
REFRIGERANT SYSTEM SERVICE
WARNINGS . . . . . . . . . . . . . . . . . . . . . 07-10–1
Using/Handling Unapproved
Refrigerant . . . . . . . . . . . . . . . . . . . . . 07-10–1
Handling Refrigerant . . . . . . . . . . . . . . 07-10–1
Storing Refrigerant. . . . . . . . . . . . . . . . 07-10–1
REFRIGERANT SYSTEM SERVICE
CAUTIONS . . . . . . . . . . . . . . . . . . . . . . 07-10–1
Handling Insufficient
Refrigerant Level . . . . . . . . . . . . . . . . 07-10–1
Handling Compressor Oil. . . . . . . . . . . 07-10–2
REFRIGERANT SYSTEM GENERAL
PROCEDURES . . . . . . . . . . . . . . . . . . . 07-10–2
End of Toc
REFRIGERANT SYSTEM SERVICE WARNINGS
WM: REFRIGERANT SYSTEM
Using/Handling Unapproved Refrigerant
• Using a flammable refrigerant, such as OZ-12, in this vehicle is dangerous. In an accident, the
refrigerant may catch fire, resulting in serious injury or death. When servicing this vehicle, use only R-
134a.
• Checking for system leakage on a vehicle that has been serviced with flammable refrigerant, such as
OZ-12, is dangerous. Conventional leak detectors use an electronically generated arc which can ignite
the refrigerant, causing serious injury or death. If a flammable refrigerant may have been used to
service the system, or if you suspect a flammable refrigerant has been used, contact the local fire
marshal or EPA office for information on handling the refrigerant.
Handling Refrigerant
• Avoid breathing air conditioning refrigerant or lubricant vapor. Exposure may irritate eyes, nose and
throat. Also, due to environmental concerns, use service equipment certified to meet the requirements
of SAE J2210 (R-134a recycling equipment) when draining R-134a from the air conditioning system. If
accidental system discharge occurs, ventilate work area before resuming service.
• Do not pressure test or leak test R-134a service equipment and/or vehicle air conditioning system with
compressed air. Some mixtures of air and R-134a have been shown to be combustible at elevated
pressures. These mixtures, if ignited, may cause injury or property damage. Additional health and
safety information may be obtained from refrigerant manufacturers.
• Do not allow the refrigerant to leak near fire or any kind of heat. A poisonous gas may be generated if
the refrigerant gas contacts fire or heat such as from cigarettes and heaters. When carrying out any
operation that can cause refrigerant leakage, extinguish or remove the above-mentioned heat sources
and maintain adequate ventilation.
• Handling liquid refrigerant is dangerous. A drop of it on the skin can result in localized frostbite. When
handling the refrigerant, wear gloves and safety goggles. If refrigerant splashes into the eyes,
immediately wash them with clean water and consult a doctor.
Storing Refrigerant
• The refrigerant container is highly pressurized. If it is subjected to high heat, it could explode,
scattering metal fragments and liquid refrigerant that can seriously injure you. Store the refrigerant at
temperatures below 40°C {104°F}.
End Of Sie
REFRIGERANT SYSTEM SERVICE CAUTIONS
Handling Insufficient Refrigerant Level
• If an insufficient refrigerant level is detected at troubleshooting, do not charge (add) the refrigerant.
Because an accurate amount of refrigerant cannot be determined from the pressure indicated on the
manifold gauge, never charge the refrigerant. If there is too much or too little refrigerant from the
refilling, there may be secondary problems such as damage to the refrigerant cycle parts, or a decrease
of cooling performance. Therefore, if it is determined that the refrigerant level is insufficient,
completely remove refrigerant from the refrigerant cycle and refill with refrigerant to the specified
amount.
REFRIGERANT SYSTEM
Manifold Gauge Set Installation . . . . . . 07-10–2
REFRIGERANT CHARGING . . . . . . . . . . 07-10–2
Charging Recycled R-134a
Refrigerant . . . . . . . . . . . . . . . . . . . . . 07-10–2
Charging Preparation . . . . . . . . . . . . . . 07-10–3
Evacuation. . . . . . . . . . . . . . . . . . . . . . . 07-10–3
Airtightness Check . . . . . . . . . . . . . . . . 07-10–3
Charging New R-134a Refrigerant . . . . 07-10–4
Leak Test. . . . . . . . . . . . . . . . . . . . . . . . 07-10–5
REFRIGERANT RECOVERY . . . . . . . . . . 07-10–6
REFRIGERANT PRESSURE CHECK . . . 07-10–6
REFRIGERANT SYSTEM
PERFORMANCE TEST . . . . . . . . . . . . . 07-10–6
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