It is highly hygroscopic. there was dissolved refrigerant in the oil-rich phase which lowered the viscosity enough to promote acceptable oil return. Extends equipment life and increases efficiency. Name a type of refrigerant oil that is not a synthetic oil? 2. 6. Immiscible is when the oil and refrigerant do not mix and stay in two phases. Near-azeotrope. Reduces energy usage. 5.6 Oil and refrigerants. Polyolester oils used with the new refrigerant alternatives also seem to have a cleaning effect. When in doubt better always check and make a note of the viscosity! Suitable for use with all types of refrigerants. Therefore, Synthetic lubricants are used with the HFC refrigerants. a replacement refrigerant generally requires a replacement _____? As PAG Oils are hygroscopic, cans do not have a long shelf life once opened. They are hygroscopic and reactive than the mineral oils. PAG oil, or Polyalkylene Glycol, is a fully synthetic hygroscopic oil specifically designed for automotive air conditioner compressors. Why are some new condensing units shipped without any oil in the compressor? It is recommended by experts as a replacement for hydrofluorocarbons (HFCs). with R-410A refrigerant and will be pushed through the sys - tem as a liquid blob, impeding refrigerant flow at the meter - ing devices and creating subsequent pressure fluctuations. compressor oil that is hygroscopic absorbs _____? If oil do not return, compressor will get damage. Mainly mineral lubricants were used with CFC and HCFC refrigerants. What is a characteristic of a refrigerant oil that is hygroscopic? Expansion valves ... (PAG) is used by most manufacturers, but some manufacturers recommend POE for retrofits. Because it is mixed with the refrigerant refrigerant and oil must have certain properties. 3. Service Application Manual SAM Chapter 620-107 Section 1A OIL IN REFRIGERATION SYSTEMS FIGURE 1. Be sure to consult the equipment manufacturer’s literature for recommendations on the best oil-refrigerant combination. Therefore, the solubility of water in HFCs and HCFCs is many times greater than in the CFCs they replace. These numbers refer to the viscosity of the oil, similar to 10W30 oil. By the end of the 1980s the first non-chlorinated refrigerant, R-134a, was on the market. HFC refrigerants and POE oils have a polar molecular structure, which attracts the polar water molecule. Compressors 4. what type of refrigerant does glide have to be considered when using a P-T chart? The most hygroscopic refrigerant oils in descending order are: PAGs, PVEs, POEs, ABs, and mineral oils. If too much humidity enters the oil, there is a risk of acid formation, which could attack the components of the system. Which is the least hygroscopic refrigerant oil? Is it necessary to pump down a compressor in order to use a hand pump to inject oil? POE oil readily absorbs moisture (hygroscopic) much faster than mineral oil. Miscibility – the ability of the oil to mix with the refrigerant. This means when exposed to moisture, it absorbs it aggressively. Some degree of miscibility is necessary between the oil and refrigerant so that the oil can return to … KD Refrigeration oils for partly and fully-fluorinated hydrocarbons (HFC, FC) – as a rule, polyol esters (POE) or polyalkylene glycols (PAG). Hydrolysis – decomposition due to a reaction with water. PAG refrigerant oil is much more hygroscopic than mineral oil, and will absorb any moisture it comes into contact with, even moisture in the air. The oil will break down into acid and alcohol. Uses of Hygroscopic Materials . SRO 500 is non- hygroscopic giving you confidence that it will not carry moisture into systems where it can combine with fluorocarbon molecules to cause rapid corrosion. The series was specifically de-veloped for HFC refrigerants. Polyolester oil (POE oil) is a type of synthetic oil used in refrigeration compressors that is compatible with the refrigerants R-134a, R-410A and R-12. Hygroscopic materials may be … It is compatible with all CFC or HCFC refrigerants also. Oil provides lubrication and cooling of compressor moving parts. Lubrication . Arts and Humanities. PAO Oil for refrigerant R134a, to some extent for This could lead to a possible problem in converted (retrofitted) systems. Lubrication . 3.0 COOLANT I3 FOR HEATER CIRCUIT (BMW I) Cabin air filter applications NOTE: … C. Which element in a CFC or HCFC molecule causes ozone depletion? Reduces compressor noise levels. What is the proper way of determining which oil to use in a system? They are commonly used in desiccators. This means that they absorb moisture very rapidly. b. c. It readily absorbs moisture. Test results showed that R-416A oil-rich phases were diluted more than straight 134a, and also more than other blends containing 134a. SRO 500 is non- hygroscopic giving you confidence that it will not carry moisture into systems where it can combine with fluorocarbon molecules to cause rapid corrosion. The chance of compressor burnout, system failures, and unscheduled maintenance can be greatly reduced by a combination of scheduled analysis and regular tear down inspections. Some seeds have hygroscopic portions that cause the shape of the seed to change when moisture is absorbed. PAG oils. It is very important to keep moisture away from hygroscopic oils to keep them from becoming contaminated. READ AND COMPLY WITH NOTES ON COMPRESSOR REPLACEMENT . It is crude oil and unrefined. those manufactured by SANDEN, VISTEON and HANON. POEs are very hygroscopic, and will therefore absorb water if given the chance. Compatible with all commonly used lubricants and refrigerant types, also with all modern seal, gasket and hose materials; SRO 500 is the ideal oil for service applications. 3. 7. After use, recap the oil container immediately to prevent moisture contami-nation. Scheduled analysis of lubricants identifies problems before they cost you money. When looking at PAG oil you will notice various numbers such as PAG46 or PAG100. 9. With the new refrigerants (HFC) mineral oils are not miscible. A high quality, environmentally sound refrigerant oil. The refrigera-tion oils described in group KD are polar products with pronounced hygroscopic characteristics. The oil comes in direct contact with hot motor windings are sealed units. Navigation Refrigeration handbook 1. Hygroscopic – Many modern oils are hygroscopic which means they attract and hold moisture. Thus, it must be able to withstand temperature extremes and harmlessness for refrigerants and equipment. Observe notes on refrigerant and refrigerant oil from 09/2013! Moisture is the enemy of refrigeration systems. In the past, so-called naphthenic mineral oils and synthetic alkylbenzenes were preferred. POE oil is widely used with the new refrigerants. compressor oil. POEs are also hygroscopic and can pick up more moisture from their surroundings and hold it much tighter than the previously used mineral oils. It is used in R-134a air conditioning systems to lubricate the compressor. These numbers refer to the viscosity of the oil, similar to 10W30 oil. LOSS OF CAPACITY WHEN OIL IS PRESENT IN R-12 . Complete R-12(CFC) / BVA 3 (MO) R-134a (HFC) and RPOE LT 32 (POE) Partial R-22 (HCFC) / BVA 4 (MO) R-134A (HFC) / RPOE 68 (POE). PAG SP-A2 oil for refrigerants R1234yf and R134a For use in electric air conditioning compressors, such as those manufactured by SANDEN and VISTEON (Hanon). moisture. zerotropes. PAG oil YF is suitable for both of the refrigerants R1234yf and R134a PAG Oil SP-A2 for refrigerant R1234yf and R134a For use in electrical compressors, e.g. POEs are very hygroscopic, and will therefore absorb water if given the chance. PAG oils are fully synthetic, hygroscopic oils based on polyalkylene glycol. Moisture in a closed system can produce acid and will harm the compressor. Miscibility – the ability of the oil to mix with the refrigerant. This refrigerant oil is very hygroscopic and must only be exposed to air humidity for a very short period. POE oil is hygroscopic in nature, which means that it attracts and absorbs water. Some degree of miscibility is necessary between the oil and refrigerant so that the oil can return to the compressor during system operation. Changes in the operation of a compressor are reflected in the properties and makeup of its lubricating oil. As PAG oils are hygroscopic, cans do not have a long shelf life once opened. Keep the system closed. Which refrigerant depletes the ozone layer? Immiscible Suva R-134A (HFC) / BVA 3 (MO). PAG oil, or Polyalkylene Glycol, is a fully synthetic hygroscopic oil specifically designed for automotive air conditioner compressors. 2.0 REFRIGERANT R1234YF. a. Oil circulates through the system with refrigerant. PVE oil can be used with HFC refrigerants. The PAG oil container should always be kept tightly capped until it is ready to be used. Exposure to the atmosphere must be limited. It has the advantage of not being hygroscopic. The oil and refrigerant should be miscible to assure that the oil is transported out of the refrigeration circuit and not accumulated in the system. Compression cycle 3. PAG oil is used extensively in automotive applications with HFC-134a. B. Oil Controls The AOFD is designed specifically for refrigerant systems that use POE oil. 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