Excess QwikShot® Refrigerant and Oil Treatment does not hurt the system in any way, since it is also adsorbed into the filter drier. If there is no more acid to be removed from the system the QwikShot® Refrigerant and Oil Treatment will attract the excess water molecules next, and facilitate their transport into the drier. The QwikShot® Refrigerant and Oil Treatment does not in anyway affect the performance of the filter/drier. It does use some of the capacity of the drier, but since the drier is being changed this is not a problem. We do not even suggest using a larger drier, however, if desired you can use a 25% larger (by volume) drier if a molecular sieve drier is being replace and a 50% larger drier if an activated alumna drier is being replaced with another activated alumna drier. If an activated alumna drier is being replaced with a molecular sieve drier the capacity has already been increased substantially (by the improved adsorption capacity of the molecular sieve), and no increase in volume is recommended.
You must change the drier if there is a burn out. If you are going to do only one thing then change the drier. This must always be done on a burn out. Every compressor manufacturer specifies this and suggests you add a suction line drier to catch any residual acid in the lines (and keep this acid from reaching the compressor). We agree completely! So QwikShot Refrigerant and Oil Treatment should always be used with a new drier.
If you dont have a burn out, but you detect acid, you again must change the drier. Some acid neutralization companies, (but no compressor manufacturers) might tell you just neutralize the acid, you dont need to change the filter/drier WRONG. Ask any compressor manufacturer, they will all tell you that you must change the filter/drier!
Again, if you do nothing else, change the drier, it is the most critical item! If you simply neutralize the acid that is present and dont change the drier, the acid and moisture levels can and will shoot right back up again, because you have left no back-up or residual protection. Neutralizing the acid only treats the system at the time it is added. Excess neutralizer reacts with the materials of construction (a potential problem) and is depleted (converted to a caustic salt); it does not remain active in the system to treat future acid. Only the drier remains in the system to remove acid and water as it appears. The problem with a high acid level is that the compressor will burn out, before the acid can be removed by the drier. QwikShot® Refrigerant and Oil Treatment accelerates the transport of acid to the drier, so that it can be removed faster.
Without a drier change, there is no capacity to maintain a low acid level. If you are not changing the drier, you are wasting your time, no matter what type of acid treatment you are using. Changing the filter/drier must always be performed, it is the most critical component of proper acid treatment!