1. Why are polyol esters the preferred choice for HFC refrigerants?
Only polyol esters combine high compatiblity with HFC refrigerants for good oil return and high coefficient of performance with excellent lubricity, load carrying and thermal stability required for prevention of wear and long compressor service life.
2. What is the acceptable moisture content of a polyol ester lubricant?
The acceptable moisture content for a polyol ester lubricant is < 50 ppm moisture. The typical moisture content of an EVEREST® product is typically < 25 ppm.
3. Can a polyol ester lubricant be dried if it contains unacceptable moisture?
It is not recommended to re-dry EVEREST® products that have been unavoidably exposed to moisture since there is usually no easy way to recertify the moisture content of the product prior to use in the field. The best prevention against moisture contamination is to always use new unopened containers that contain the appropriate volume of lubricant for the intended application.
4. How do I ensure that the polyol ester lubricant is dry?
Purchase only the appropriate volume(s) of EVEREST® product required for the specific application. Keep the container tightly closed when not in use. Make sure the refrigeration equipment has been thoroughly cleaned and dried prior to charging the new oil and refrigerant. Always keep the system closed when it is not being serviced.
5. Are there applications when I should not use a polyol ester lubricant?
EVEREST® refrigeration lubricants are not suitable for use in compressors or systems using ammonia refrigerant.
6. Can I use EVEREST® refrigeration lubricants in systems using R-12 or R-22s?
Yes. Although EVEREST® refrigeration lubricants were designed for new environmentally friendly hydrofluorocarbon (HFC) refrigerants, they are fully compatible and can be used as a substitute for mineral oils and alkylated benzenes with R-12 and R-22.
7. Can I mix EVEREST® refrigeration lubricants with other types of refrigeration lubricants?
Although EVEREST® refrigeration lubricants are designed to be compatible with most other types of mineral oil and synthetic refrigeration lubricants, it is recommended that intentional mixing be avoided. However, EVEREST® refrigeration lubricants are an excellent choice for retrofits of CFC and HCFC systems and will be fully compatible with any residual lubricant remaining in the system after cleaning and prior to charging the POE and HFC refrigerant.
8. Do I need to clean the refrigeration system and compressor sump that previously contained a mineral oil or other type of synthetic refrigeratin lubricant before adding EVEREST® lubricants?
Although EVEREST® refrigeration lubricants are compatible with most mineral oils and other types of synthetic lubricants it is recommended that the system and compressor be properly cleaned and dried according to the manufacturer's instructions prior to the introduction of new EVEREST® lubricant.
9. What do I do with unused EVEREST® refrigeration lubricant?
The unused portion of any EVEREST® refrigeration lubricant can be kept for future use as long as it is tightly sealed immediately after use and stored in a dry location in its original container. Product that has not been used within six (6) months of the first opening of the container should be disposed of according to local, state and federal regulations.