This also requires considerable constructional changes to compressors, heat exchangers, and controls, as well as measures of tuning vibrations. There are stricter safety requirements, e. Irrespective of the design of components on the high pressure side, the condensing temperature is thus limited.
Due to the extremely high demand for RA, a timely switch to alternatives is needed in the EU. RC with a correspondingly high proportion of R Due to its lower Ra content, its volumetric refrigerating capacity and pressure levels are higher than for RA.
This results in different performance parameters and a different focus within the application range. The same applies to a further blend with the same main components, but Ra as hydrocarbon additive. This formulation was designed especially for a higher critical temperature for applications in hot climate areas.
Like RC, all four substitute refrigerants are zeotropic blends with a more or less significant temperature glide. In this respect, the criteria described for RC also apply here. Apart from a similar refrigeration capacity, there are nevertheless fundamental differences in thermodynamic properties and in oil transport behaviour.
These properties indicate that there are differences in the optimization of system components, and a heat exchanger between liquid and suction lines is of advantage. Despite the predominant proportion of HFC refrigerants, conventional lubricants can be used to some extent because of the good solubility of the hydrocarbon constituent.
In such cases, additional measures are necessary. For further information on oil return and lubricants, RA as substitute for R22 and R An individual selection is possible upon request.
In spite of the blend composition based on pure HFC refrigerants, the manufacturer states that a simplified conversion procedure is possible.
This is facilitated by the Ra proportion. Accordingly, when converting from R22 to RA, all it takes is a replacement of the original oil charge with ester oil. However, it must be taken into account that the highly polarized mixture of ester oil and HFC will lead to increased dissolving of decomposition products and dirt in the pipework. Therefore, generously dimensioned suction clean-up filters must be provided.
Regarding refrigerating capacity, pressure levels, mass flow and vapor density, RA is relatively close to R During retrofit, essential components such as expansion valves can remain in the system. The average lifespan of an air conditioning unit is 15 to 20 years. This means that any unit built before is already nearing its twilight years. Add those additional energy costs with the increased cost of R22, and it just may not be worth putting off a replacement.
You could opt to do nothing. Even if nothing happens to your unit, an older unit could also cost you if you plan to sell your home and want to get top dollar for the sale.
Scheduling regular, proactive maintenance will extend the lifespan of your existing unit and protect you from unforeseen problems while you pursue a viable long-term solution — replacement! A new unit is an investment.
Being proactive about maintenance also buys you time to save money for the unit you need. The R22 is contained in the outdoor compressor, so some people come to us hoping that they can simply swap out the outdoor compressor and leave the inside portion intact.
The initial costs of an R22 system replacement may feel high, but consider this: the cost of repairing your existing unit combined with the higher energy costs that are typical with an older unit may ultimately cost you more than going ahead with a replacement. Although these guidelines may be a surprise to you, the heating and cooling industry has been preparing for them for quite some time.
At Home Climates, our EPA-certified technicians are available to service existing units, answer all of your questions and put your mind at ease about how these changes impact you. Serving Elizabethtown and surrounding Central Pennsylvania locations, Home Climates offers a five-year labor warranty and a year parts warranty on our work.
Make an appointment with Home Climates today. Check your inbox or spam folder to confirm your subscription. What is R22? Why is this a big deal? So what does all of this mean for homeowners? Keep reading to find out!
So how does a decades-old EPA agreement impact you? Recycled R22 can be used until , but only for maintenance purposes. If a system were to need a complete recharge of R22 gas, it would be considered obsolete and have to be replaced as the law prohibits any new use of R22 gas.
As remaining supplies of R22 start to run out, prices are expected to rise drastically. The expense of replacing existing equipment with new environmentally approved equipment may soon be less than the expense of purchasing more R22 to maintain current equipment. These price increases are expected to affect individual households the heaviest. As R22 is phased out, new ozone friendly alternatives are being introduced to the refrigerant market. The most common alternative is RA, which is a mixture of hydrofluorocarbons that do not contribute to the ozone depletion.
However, they are expected to have other environmental effects and are still being researched.
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