By the end of the 1980s the first non-chlorinated refrigerant, R-134a, was on the market. POE oil is widely used with the new refrigerants. Oil circulates through the system with refrigerant. This means when exposed to moisture, it absorbs it aggressively. 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. Navigation Refrigeration handbook 1. When looking at PAG oil you will notice various numbers such as PAG46 or PAG100. zerotropes. PAG oils. The most hygroscopic refrigerant oils in descending order are: PAGs, PVEs, POEs, ABs, and mineral oils. compressor oil. Observe notes on refrigerant and refrigerant oil from 09/2013! Basic heat transfer 2. Uses of Hygroscopic Materials . d. It can be left open to the ambient air. 2.1 REFRIGERANT OIL FOR R134A/R1234YF. As PAG oils are hygroscopic, cans do not have a long shelf life once opened. A high quality, environmentally sound refrigerant oil. LOSS OF CAPACITY WHEN OIL IS PRESENT IN R-12 . 3. It is crude oil and unrefined. Hydrolysis – decomposition due to a reaction with water. It is highly hygroscopic. Compatible with all other lubricants. Moisture in a closed system can produce acid and will harm the compressor. 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. It is used in R-134a air conditioning systems to lubricate the compressor. PAG oils are fully synthetic, hygroscopic oils based on polyalkylene glycol. B. PAG oil YF is suitable for both R1234yf and R134a refrigerants. Which refrigerant depletes the ozone layer? The AOFD protects compressors by removing moisture and trapping contaminants. a. Some seeds have hygroscopic portions that cause the shape of the seed to change when moisture is absorbed. This oil has one problem. Oil provides lubrication and cooling of compressor moving parts. When looking at PAG oil you will notice various numbers such as PAG46 or PAG100. It is very important to keep moisture away from hygroscopic oils to keep them from becoming contaminated. The POE oils are more Hygroscopic than mineral oils. PVE oil can be used with HFC refrigerants. Lubrication . The oil comes in direct contact with hot motor windings are sealed units. Suitable for use with all types of refrigerants. Expansion valves ... (PAG) is used by most manufacturers, but some manufacturers recommend POE for retrofits. Hygroscopic – Many modern oils are hygroscopic which means they attract and hold moisture. 8. When in doubt better always check and make a note of the viscosity! a replacement refrigerant generally requires a replacement _____? The refrigerant dissolved in the oil significantly reduces the viscosity, improving oil fluidity and minimising the negative influence on heat transfer in heat exchangers. 3.0 COOLANT I3 FOR HEATER CIRCUIT (BMW I) Cabin air filter applications NOTE: … 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. It is used in R-134a air conditioning systems to lubricate the compressor. POEs are very hygroscopic, and will therefore absorb water if given the chance. Immiscible is when the oil and refrigerant do not mix and stay in two phases. Reduces compressor noise levels. Be sure to consult the equipment manufacturer’s literature for recommendations on the best oil-refrigerant combination. Keep the system closed. 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. Moisture is the enemy of refrigeration systems. PAG oil, or Polyalkylene Glycol, is a fully synthetic hygroscopic oil specifically designed for automotive air conditioner compressors. They are commonly used in desiccators. Non hygroscopic. Some degree of miscibility is necessary between the oil and refrigerant so that the oil can return to the compressor during system operation. Compression cycle 3. Like the Karl Fischer Titrator, a relative humidity (RH) moisture analy Because it is mixed with the refrigerant refrigerant and oil must have certain properties. Along with R-134a, POE oil is recommended as a replacement for R12 mineral oil as R134a does not mix well with mineral oil. POE oil is hygroscopic in nature, which means that it attracts and absorbs water. Thus, it must be able to withstand temperature extremes and harmlessness for refrigerants and equipment. 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). BVA RPOE Series is miscible with all HFC, HCFC, CFC and blends. 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. READ AND COMPLY WITH NOTES ON COMPRESSOR REPLACEMENT . 5.6 Oil and refrigerants. The series was specifically de-veloped for HFC refrigerants. Which is the least hygroscopic refrigerant oil? 5. Reduces energy usage. Some degree of miscibility is necessary between the oil and refrigerant so that the oil can return to … It is a good lubricant. 3. To find out which type of oil is flowing through the cooling circuit, refer to the vehicle documents or the service sticker of the A/C system. Oil Controls The AOFD is designed specifically for refrigerant systems that use POE oil. Improves heat transfer in the evaporator and condensing coils. What type of blend refrigerant would you have if its P-T chart contains a bubble point and a dew point? Exposure to the atmosphere must be limited. The refrigera-tion oils described in group KD are polar products with pronounced hygroscopic characteristics. If too much humidity enters the oil, there is a risk of acid formation, which could attack the components of the system. b. Hygroscopic substances are used to keep products dry or to remove water from an area. 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. those manufactured by SANDEN, VISTEON and HANON. KD Refrigeration oils for partly and fully-fluorinated hydrocarbons (HFC, FC) – as a rule, polyol esters (POE) or polyalkylene glycols (PAG). Changes in the operation of a compressor are reflected in the properties and makeup of its lubricating oil. PAG oil, or Polyalkylene Glycol, is a fully synthetic hygroscopic oil specifically designed for automotive air conditioner compressors. Accuracy and precision are important when monitoring the moisture content within in-service lubricant oils. Service Application Manual SAM Chapter 620-107 Section 1A OIL IN REFRIGERATION SYSTEMS FIGURE 1. 7. This oil is used in newer systems that use HFC refrigerants (such as R-410A). Test results showed that R-416A oil-rich phases were diluted more than straight 134a, and also more than other blends containing 134a. In the past, so-called naphthenic mineral oils and synthetic alkylbenzenes were preferred. What is the proper way of determining which oil to use in a system? Subjects. These numbers refer to the viscosity of the oil, similar to 10W30 oil. HFC refrigerants and POE oils have a polar molecular structure, which attracts the polar water molecule. Immiscible Suva R-134A (HFC) / BVA 3 (MO). compressor oil that is hygroscopic absorbs _____? Miscibility is the ability of an oil to dissolve uniformly in refrigerant in either the liquid or vapor state. moisture. What is a characteristic of a refrigerant oil that is hygroscopic? The PAG oil container should always be kept tightly capped until it is ready to be used. Mainly mineral lubricants were used with CFC and HCFC refrigerants. C. Which element in a CFC or HCFC molecule causes ozone depletion? 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. position of the oil-refrigerant mixture. Compressors 4. Miscibility – the ability of the oil to mix with the refrigerant. POEs are very hygroscopic, and will therefore absorb water if given the chance. Therefore, the solubility of water in HFCs and HCFCs is many times greater than in the CFCs they replace. 4. PAO Oil for refrigerant R134a, to some extent for Is it necessary to pump down a compressor in order to use a hand pump to inject oil? This means that they absorb moisture very rapidly. This could lead to a possible problem in converted (retrofitted) systems. If refrigerant oil did the same thing—that is, if it remained in the compressor crankcase—it would eliminate many oil-related problems in refrigeration systems. They are hygroscopic and reactive than the mineral oils. 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. Hygroscopic materials may be … R-134a is an HFC (hydrofluorcarbons) used to replace the chlorinated refrigerant R- 12. Polyolester oils used with the new refrigerant alternatives also seem to have a cleaning effect. It is compatible with all CFC or HCFC refrigerants also. Arts and Humanities. 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). a. Fluorine b. Chlorine c. Carbon d. hydrogen . The most hygroscopic refrigerant oils in descending order are: PAGs, PVEs, POEs, ABs, and mineral oils. With the new refrigerants (HFC) mineral oils are not miscible. POEs are also hygroscopic and can pick up more moisture from their surroundings and hold it much tighter than the previously used mineral oils. what type of refrigerant does glide have to be considered when using a P-T chart? POE oil readily absorbs moisture (hygroscopic) much faster than mineral oil. 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. 9. 2.0 REFRIGERANT R1234YF. These numbers refer to the viscosity of the oil, similar to 10W30 oil. This refrigerant oil is very hygroscopic and must only be exposed to air humidity for a very short period. 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. Name a type of refrigerant oil that is not a synthetic oil? It has the advantage of not being hygroscopic. c. It readily absorbs moisture. 6. Proper system evacuation upon system installation and after opening the system for serv - Therefore, Synthetic lubricants are used with the HFC refrigerants. Scheduled analysis of lubricants identifies problems before they cost you money. Why are some new condensing units shipped without any oil in the compressor? PAG oil is used extensively in automotive applications with HFC-134a. The oil will break down into acid and alcohol. 2. If oil do not return, compressor will get damage. 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