Gas and Oil Home Heating Furnaces - A/C Refrigerant Acidity
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Owner Occupied
07-08-02, 02:48 PM
I have heard that if the closed refrigerant system empties and oxygen contaminates the system, the oil turns acidic. This contaminant cannot be filtered out and requires the replacement of compresser, evaporater, condenser, and connecting lines.:confused:
lynn comstock
07-10-02, 12:02 AM
Air needs to be removed from a system for a lot of reasons. This can be done by recovering all of the refrigerant and air from the system into a recovery tank. Evacuate the system further to 500 microns.
Then replace the liquid line drier with an acid removing type of filter drier. It will also capture oil sludges and other garbage created by the chemical interactions of heat, oil, and air.
Then most of the refrigerant can be recharged into the system AS A LIQUID. The air will be trapped in the drum above the last pound of liquid that you do NOT reinstall into your system
Add new refrigerant to bring the system up to full charge (by weight).
There is an additive that neutralizes system acids available. At least some manufacturers have endorsed the product. Do not use in a system covered by a warranty unless the manufacturer approves IN WRITING.
Then replace the liquid line drier with an acid removing type of filter drier. It will also capture oil sludges and other garbage created by the chemical interactions of heat, oil, and air.
Then most of the refrigerant can be recharged into the system AS A LIQUID. The air will be trapped in the drum above the last pound of liquid that you do NOT reinstall into your system
Add new refrigerant to bring the system up to full charge (by weight).
There is an additive that neutralizes system acids available. At least some manufacturers have endorsed the product. Do not use in a system covered by a warranty unless the manufacturer approves IN WRITING.