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Jul
This should be a part of your maintenance routine regardless of a units refrigerant levels or other indicators of leaks. The test result obtained by the Acid Detector Tube can be a predictor of compressor failure.
Neutralizes the acid in the AC system.
Acid in refrigeration system. Depending on the refrigerant and lubricant being used a refrigeration system can contain two types of acids. Organic acids such as oleic acid and. Acid formation in refrigeration systems is usually the result of water combining with the refrigerant.
When the moisture is compressed to higher pressures the gas temperature also increases. After repeated cycles the acid begins to form and circulate with the oil. Refrigeration systems with a purge for removing non-condensables from the refrigerant and an acid filter for remove acid from the refrigerant are provided.
The acid filter can be operatively connected to the purge. Optionally the purge can include a separating device for separating non-condensable gases from condensable refrigerant gases and an acid filter is provided to remove acid from the condensable refrigerant. Refrigeration systems with a purge for removing non-condensables from the refrigerant and an acid filter for remove acid from the refrigerant are provided.
The acid filter can be operatively connected to the purge. Optionally the purge can include a separating device for separating non-condensable gases from condensable refrigerant gases and an acid filter is provided to remove acid from the. The refrigerant in a vapor compression refrigeration system may contain acid contaminants.
When a refrigerant is subjected to excessive temperatures such as in an overheating compressor it may decompose chemically. Commonly one or more types of acid are found among the decomposition products regardless of the type of refrigerant. Once acid is created within the refrigeration system.
A Dry nitrogen must be used to reverse the increase in system high-side pressure caused by the acid. B It can cause a burnout when the refrigerant is exposed to the compressor motor. C Only a multiple evacuation procedure can be used to evacuate the refrigeration system.
Small amounts of moisture will react with the refrigerant and oil and cause it to become acidic. As this gets pumped around the system it forms an electrolytic copper coating on all steel surfaces such as the compressor valves and internal controls. These copper deposits reduce bearing clearances and can cause some components to seize.
In order to maintain solids in solution water that is high in alkalinity and hardness may require the feed of sulfuric acid or an acid salt in addition to blowdown. Acid feed requires careful handling and control and should only be used where the blowdown rate would otherwise be excessive. The refrigerants in the newer hydrofluorocarbon HFCPOE systems are much more thermally stable than the older CFCHCFC refrigerants and mineral acid formation is negligible.
However acidity is produced in the new systems by hydrolytic decomposition of the POE lubricants with water to produce the parent organic acids and alcohols used to prepare the POE. A method for neutralizing the acid in spent refrigeration oil that has been removed from a refrigerant compressor system comprising. Mixing an anhydrous alkaline solution consisting essentially of an alcohol soluble neutralizing agent dissolved in an anhydrous C 1 to C 12 alcohol said solution being suitable for neutralizing said acid with a.
The Acid levels of refrigerant gases need to be measured to ensure that a system is operating properly. Knowing the purity of Refrigerant is vital information for every service technician. The test result obtained by the Acid Detector Tube can be a predictor of compressor failure.
Tests for acid levels in refrigerant. The refrigerants in the newer hydrofluorocarbon HFCPOE systems are much more thermally stable than the older CFCHCFC refrigerants and mineral acid formation is negligible. Acid test of refrigerant shows no signs.
Pressure drop across the suction line drier is 10psi. Amp draws are great. Return 15 hours later and perform another refrigerant acid test.
SLFD pressure drop 5psi. Ohm and meg compressor with great results. Return the next day and test refrigerant for acid.
In VERY large systems such as chillers we are beginning to see oilless technologies with magnetic bearings like TurboCor from Danfoss shown above but these are still pretty rare in the field. So we are left with circulating oil through the system and returning it to the compressor as a regular part of AC and refrigeration system operation under normal running conditions. The first step in treating systems with acidic refrigerant is testing to confirm the presence of acid.
This should be a part of your maintenance routine regardless of a units refrigerant levels or other indicators of leaks. Testing for acid in a system can help you treat the underlying issue before formicary corrosion creates holes in the coils. Checking the refrigerant andor oil acid is a common maintenance recommendation since acidic conditions can be cleaned up before a compressor motor burns out.
With the new HFC refrigerants the various types of oils that could be in a system and the recycling of refrigerant it is more important than ever to check the acid in a system. Finally circulating oil may break down at hot spots in the system and cause varnishing and valve sticking. It may react with the refrigerant at high temperatures and form acids.
AMOUNT OF OIL CIRCULATED. In the field it is hard to find out how much oil is circulating with the refrigerant. It helps to know the complete history of the equipment.
Acid Neutralizer can be added directly to the refrigeration oil in the compressors crankcase prior to installing and charging the system. Avoid prolonged exposure to air as most new refrigeration oils and Acid Neutralizer are very hygroscopic. ALWAYS determine the compressors oil volume before preceding.
The uorine included in every refrigerant gas bonds with the excess in moisture forming uoridric acid that damages the compressor and the other vulnerable parts of the system. Neutralizes the acid in the AC system. Extends the life span of the compressor.
Acid-Away Pro 15 oz. Acid-AwayPro helps prevent compressor burnout by removing acid buildup in refrigeration oils of AC refrigeration systems. It is shown as highly effective in field test evaluations on a range of compressor sizes types brands severity of burnouts.