Frigidaire r4a manuals manuals and user guides for frigidaire r4a. Therefore, it must be allowed to cool before the compressor can restart. Edraw max lets you create graphics and diagrams to suit all of these requirements and much more. Results there are a few subtleties involved in quantifying tes. Forane 4a r4a is a nonozone depleting hfc with properties very similar to r12. Refrigerant r4a is a hydrofluorocarbon hfc that has zero potential to cause the depletion of the ozone layer and very little greenhouse effect.
It is intended to be used for advanced technical applications. Use r4a gas leak detector similarly, always use an r 4a dedicated leak detec tor. The art of cooling nrf product range engine cooling. R4a pressure enthalpy chart the engineering mindset. Refrigerant r4a pdf this r4a refrigeration technician handbook was developed as. Find, read and cite all the research you need on researchgate. The bubble to the left is the portion of the diagram where the refrigerant is in the saturated condition. This paper is an effort to try to provide some troubleshooting information to tdi owners. Rev 7, 6182009 this guide is for manual air conditioning as opposed to climatronic ac or climatic ac, with two 2speed fans on volkswagen a4s built after may 1999. The log ph diagrams on this page can be retrieved from the coolpack program, which can be downloaded here. We have 8 frigidaire r4a manuals available for free pdf download. Use extinguishing measures that are appropriate to local circumstances and the surrounding environment.
Gradall system operation highway speed models xl3100iii xl4100iii xl5100iii. Enthalpy kjkg 140 160 180 200 220 240 260 280 300 320 340 360 380 400 420 440 460 480 500 520 540 560 pressure bar 0,50 0,60 0,70 0,80 0,90 1,00. Test results related symptoms probable cause remedy discharge pressure abnormally high after stopping ac compressor, pressure drops about 196 kpa 2. Straight line diagrams, roadway information and traffic. A subset of the available data, shown in table 1 with an asterisk, was used the detennination of. R4a pressureenthalpy diagram s specific entropy, kjkgk ttemperature. Radiators intercoolers oil coolers fan blades fan clutches egr coolers gaskets air conditioning. The following information is provided to give an overview of generally acceptable hose, fitting and tube coupling as used in the automotive air conditioning industry. Summary of experimental pvt data for r4a source number of data points zhu et al. Thermodynamic properties of r4a mcgrawhill education. Portable document format documents are the standard for crossplatform compatibility. Download a pdf copy of the pressure enthalpy chart for both metric and imperial units. Some scientific and engineering data online german. R4a refrigerant 3 is r4a a more environmentally friendly refrigerant.
What is the best refrigerant for high ambient temperature. It will completely eliminate the root cause of diagramming conflict. This page shows log ph diagrams for the following refrigerants. Evaluation of hfo 1234yf as a potential replacement for r4a in refrigeration. Ass a refrigerant, a liquid capable of vaporizing at low temperature, used in automotive air conditioning, the u. R4a is used in applications, including automotive air conditioning, chillers, medium temperature commercial refrigeration, refrigeration appliances, dehumidifier, and transport refrigeration. R4a is also known as tetrafluoroethane cf3ch2f from the family of hfc refrigerant. And now, its connected to the adobe document cloud. Table d2e properties of saturated r4apressure table. Always replace the filterdrier during any repair on the sealed system. Refrigerant 4a table pdf figure a14 ph diagram for refrigerant4a. The pdf file structure was designed to work while online therefore saving these pdf files to a desktop will cause the bookmarked links to each sld to be broken. This will consist of forty compulsory multiple choice questions. As an airconditioning refrigerant in newer automobiles, the optimal running pressure for r4a is between 22 and 57 pounds per square inch.
R12 conversion to r4a refrigerant service procedures noncontaminated sealed system repairs note. Adobe acrobat reader dc software is the free global standard for reliably viewing, printing, and commenting on pdf documents. How to read refrigerant property diagrams r4a youtube. It can produce any kind of diagrams ranging from flowcharts, mind maps, floor plans to doughnut charts and many more as listed below. Temperature change is not a pertinent parameter for a purely latent heat process. R4a pressure temperature chart edit, fill, sign online.
Generally the quantities of interest are the energy stored per degree temperature change per unit mass or unit volume. R12 dichlorodifluoromethane properties thermodynamic properties of saturated and superheated dichlorodifluoromethane cf 2 cl 2 specific volume, enthalpy and entropy. Latitude yciv0157p, latitude yciv0177p, latitude yciv0187p. Gradall system operation gradall excavator manuals. The dupont oval logo, dupont, the miracles of science and suva. Pdf the report addresses issues of plotting the pressureenthalpy and. Adobe provides acrobat reader dc as a free online download to open, view, and comment on pdfs. Now refer to the txv system charge level chart a or b pages 3 ptk pai sd pdf or 4 see note. Open issues in control of automotive r744 airconditioning.
Air cooled screw liquid chillers r4a 150 385 tons 527 54 kwi 2 and 3 compressor 50 and 60 hz ashrae 90. Find the high and low side service ports for the r12 airconditioning system. Mollier diagram r4a pdf r4a is a single component hfc refrigerant tetrofluoroethane commonly used for medium temperature applications. Refrigerants temperature and pressure at constant boiling. R4a is a single component hfc refrigerant tetrofluoroethane commonly used for medium. Constant density constant entropy constant temperature constant quality pressureenthalpy chart constant density density density density density 950. Refrigerants commonly used refrigerants methane series. P h diagram r4a pdf p h diagram r4a pdf p h diagram r4a pdf download. The refrigerant r4a is the chemical compound tetrafluoroethane. Hydraulics provide power, speed, control, and flexibility to perform machine. Condensers compressors evaporators heaters receiver driers. Thermodynamic properties of r4a 1,1,1,2tetrafluoroethane.
Printable and fillable r4a pressure temperature chart. Use these diagrams with caution and at your own risk as we are not responsible for. Will i use less fuel with a properly designed r4a system as compared to one running with r407c. Push the high side retrofit r4a fitting over the old fitting and use a wrench to tighten. Thermodynamic properties of r4a 1,1,1,2tetrafluoroethane m. How to convert an r12 to the r4a system it still runs. Hydraulic system introduction gradall xl series highway speed excavators machines use hydraulics to power all major machine functions. Environmental protection agency, states that r4a is not flammable at ambient temperatures and not corrosive to metals such as aluminum. Hydraulic system overview the hydraulic system, when viewed as a schematic, appears very complex.
Barcelona girona madrid zaragoza 1 technical r4a data sheet features and uses of r4a the refrigerant gas r4a is a hfc replacing r12 in new installations. Huber national institute of standards and technology, marcia. Use these diagrams with caution and at your own risk as we are not responsible for negligence as a result of use. Yet the system is merely many simple components and circuits working together. Refrigerant r4a or hfc4a was developed to meet these needs. R4a has been able to replace r12 successfully in number. Attach temporary access valve to inlet end of filterdrier. Air conditioning air conditioning systems heating, cooling and dehumidification of indoor air for thermal comfort. The blue line on the left of the bubble represents the 100% saturated liquid line, the thin dashed line on the right represents the 100% saturated vapor line, and anywhere inside the bubble represents the. Calculation of thermodynamic state variables of tetrafluorethane r4a. It can be used both as a pure refrigerant and as a component in refrigerant blends. Refrigeration condition r4a water side outlet temperature 515c air side inlet temperature 2143c personnel must be fully acquainted with the operation manual before operating the refrigerant system warning. Its the only pdf viewer that can open and interact with all types of pdf content, including. Always use r4a dedicated manifold gauges to pre vent r1 2 and ri 2 compressor oil contaminating the r 4a system.
With the discovery of the damaging effect of cfcs and hcfcs refrigerants to the ozone layer, the hfc family of refrigerant has been widely used as their replacement. Figure a15 nelsonobert generalized compressibility chart. A4 air conditioning control circuit troubleshooting rev 7. The r1 2 leak detector is not sufficiently sensitive. It is also a common component in many hfc refrigerant blends and is used. Refrigeration and airconditioning scheme of examination the examinations shall consist of three papers, all of which must be taken. Refrigerant r4a or hfc4a is a commercially available hydrofluorocarbon hfc refrigerant for use as a longterm replacement for r12 in new equipment and for retrofitting medium temperature cfc12 systems. Refrigerants temperature and pressure charts temperature and pressure chart for refrigerants r22, r410a, r12, r4a, r401a, r409a, r502, r404a, r507a, r408a and r402a tag search en. Copying images or editable text from a pdf file using acrobat reader dc on your computer. Pdf preliminary experimental results on the r4a refrigeration. A4 air conditioning control circuit troubleshooting.
Push the low side retrofit r4a fitting over the old fitting and use a wrench to tighten it. Pdf plotting of ph and ts diagrams of fluoropropylenes. R4atables excel addin sample calculations in excel. Counterfeit r4a refrigerant containing, among other gases, significant. The aircooled screw chiller unit is designed based on the following conditions. The conversion is determined by multiplying the r12 charge value by. Papers 1 and 2 shall be composite and will be taken at one sitting. A international standard formulation for the thermodynamic properties of 1,1,1,2tetrafluoroethane hfc4a for temperatures from 170 k to 455 k and pressures up to 70 mpa. Table 1 lists the experimental pressurevolumetemperature pvt data sets for r4a. Forane 4a, r4a, pressure temperature chart, pt chart, hvac, refrigeration, air conditioning, refrigerant gas created date. Refrigerants and specialities wernervonsiemens str 18 d97076 wuerzburg. A4 air conditioning control circuit troubleshooting rev 7, 6. Factory parts catalog, service data sheet, datasheet.