Auto Service Professional

APR 2018

Magazine for the auto service professional

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28 | ASP April 2018 Technical Here are some things you should be aware of as you begin working with R1234yf: • It is very expensive in comparison to R134a, so you'll need to be prepared to educate your customers as to why your estimate is considerably higher than it was before. • To prevent cross-contamination with dif- ferent refrigerants, vehicles with R1234yf have different service fittings. • R1234yf refrigerant is mildly flammable, so safety in handling is very important. • e procedure for servicing vehicles with R1234yf is going to take longer than with R134a vehicles. • Increased service times are due to extra safety processes built into the new service equipment to ensure a vehicle A/C system is leak free prior to a recharge. • More leak and purity check capabilities are built into new A/C machines for R1234yf that comply with SAE standards. Regardless of what machine you use to service A/C systems, Society of Automotive Engineers (SAE)-certified processes ensure the machine will operate with specific equipment performance, purity and safety guidelines for the recovery and recycling of motor vehicle A/C refrigerant. Refer to the SAE J2788 guideline for R134a refrigerant and the SAE J2843 guideline for R1234yf refriger- ant before purchasing a product. At this point you might ask: Should my shop purchase a new machine to handle the R1234yf refrigerant? Keep in mind that older A/C machines that worked with R134a will not be able to service the new refrigerant. So, you will need a separate machine for servicing R1234yf-equipped vehicles. ere's no doubt that purchasing one of the new machines is a serious capital investment. Our work with service providers in the field has shown that the payoff is quick for getting a return on your investment and A/C service is still one of the most valuable services aftermarket shops can provide. Contamination is getting worse e chance of refrigerant contamination has gotten worse, so taking preventive steps to preserve the life of your A/C machines is imperative. Refrigerant identification tools are the best line of defense against counterfeit or contami- nated refrigerants. e options range from external hand-held units to internal/embedded options included in the A/C machine. Refriger- ant identifiers vary in price and in the detail of data collected. One of the best ways to safely recover contami- nated refrigerant is the use of a recovery only unit (ROU). An example is the Mahle Service Solutions ArcticPRO® ROU250, a recovery-only unit designed to safely remove the new R1234yf refrigerant even if it is contaminated. It will Yellow Jacket's ManTooth Wireless pressure/temperature gauge set includes high and low pressure connections (R-134a and R-1234yf included) with 2 Bluetooth wireless gauges, 2 temperature clamps, an A/C charger and USB cable. The ports on the wireless gauges provide connections for both the pressure gauges and the temperature clamps. Photo courtesy Ritchie Engineering/Yellow Jacket Products

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