Heater And Air Conditioning System Precautions

 Air Conditioning Oils
Before you have opened the system
Beware
When discharging air conditioning system, use only approved refrigerant recovery recycling equipment make sure you make every attempt to avoid discharging refrigerant into the atmosphere.
DISCHARGING THE A/C SYSTEM
The EPA indicates that R-11, R-12 and R-113 are very harmful to the Earths Ozone layer. Make sure you make every attempt possible to avoid discharging R-11, R-12 or R-113 into the atmosphere.
1. Remove service valve and install gauges. For high side gauge hose, Adapter must be used to connect to high side service valve.
2. Slightly open low side gauge valve and let refrigerant escape slowly without losing refrigerant oil.
3. When system is nearly discharged, using approved refrigerant recovery recycling equipment, open high side gauge valve to release any pressure trapped in compressor. Close valves immediately after discharging to prevent entry of moisture.
DISCONNECTING LINES & FITTINGS
1. After system is discharged, using approved refrigerant recovery recycling equipment, carefully clean entire area around coupling nut to prevent dirt entering system. Always use two wrenches to avoid twisting or distorting lines and fittings
2. Cap or plug all LINES and FITTINGS immediately to prevent entry of air and moisture into system. Do not remove these caps until connections are being made make sure you make every attempt to avoid discharging refrigerant into the atmosphere.

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