Low pressures in evaporator low side and condenser high side. Furthermore, r4a is a chemical refrigerant in automotive and domestic use air conditioners. The dupont oval logo, dupont, the miracles of science and suva. View and download frigidaire r4a factory parts catalog online. The table below shows the comparison between temperature and pressure for r4a.
Always replace the filterdrier during any repair on the sealed system. Attach temporary access valve to inlet end of filterdrier. The new hot topic is a return to carbon dioxide as a refrigerant. Based on thermodynamic properties of hfc4a 2 tetra. R4a, r32, r152a, r290, r1270 and r600a to be analyzed have been taken from the refprop 7. Thermodynamic properties of r4a 1,1,1,2tetrafluoroethane m. R4a refrigerant 3 is r4a a more environmentally friendly refrigerant. The gauges readings will depend on the ambient temperature. Tecumseh aea3430yxa replacement refrigeration compressor. Pressureenthalpy diagram for r4a refrigerant ohio university. Latitude yciv0157p, latitude yciv0177p, latitude yciv0187p. Refrigerants temperature and pressure at constant boiling. Push the low side retrofit r4a fitting over the old fitting and use a wrench to tighten it.
Air cooled screw liquid chillers r4a 150 385 tons 527 54 kwi 2 and 3 compressor 50 and 60 hz ashrae 90. Frt18fr7eb2, frt18fr7eq0, frt18fr7eq2, frt18fr7ew0, frt18fr7ew2. Find the high and low side service ports for the r12 airconditioning system. Huber national institute of standards and technology, marcia. 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. Edit, fill, sign, download r4a pressure temperature chart online on. Environmental protection agency, states that r4a is not flammable at ambient temperatures and not corrosive to metals such as aluminum. System pressure chart get a quick look at what an average ac system looks like, along with the compressor manufacturer and what the specific r4a requirements are for your car. The enthalpy of dmac with respect to temperature at saturated condition is given by h 100 at 0. 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. Temperature and pressure chart of refrigerants r22, r410a, r12, r4a, r401a, r409a, r502, r404a, r507a, r408a and r402a related searches for r4a working pressure chart related searches r4a pressure chart pdf auto r4a pressure chart r4a pressure chart for cars pressure temperature chart r4a r4a pressure temp chart r4a pressure. New tables of the thermodynamic properties of hfc4a have been developed and are presented here.
Summary of experimental pvt data for r4a source number of data points zhu et al. Mvac systems that are low on refrigerant will have. 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. 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. Will i use less fuel with a properly designed r4a system as compared to one running with r407c. The region to the left of the envelope represents liquid in a subcooled condition. R4a refrigerant pressure temperature chart r4a is an inert gas also known as tetrafluoroethane, and for air conditioner systems. R4a pressure temperature chart edit, fill, sign online. Additionally, hvac systems such as chilled water systems in both commercial markets and industrial markets. R4a is the refrigerant on the illustrated diagram at 100 degrees f state point a is located near the bottom of the condenser where the refrigerant is a saturated liquid at the condensing temperature and pressure. R4a pressure gauge readings vehicle air conditioning.
R4a refrigerant pressure temperature chart pt table. Refrigerants and specialities wernervonsiemens str 18 d97076 wuerzburg. 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. The log ph diagrams on this page can be retrieved from the coolpack program, which can be downloaded here. R12 conversion to r4a refrigerant service procedures noncontaminated sealed system repairs note. Ass a refrigerant, a liquid capable of vaporizing at low temperature, used in automotive air conditioning, the u. Actually it is log pressure versus enthalpy up mollierchart cooltime if you need to compare the performance of refrigerants, this program will suit your needs. P h diagram r4a pdf p h diagram r4a pdf p h diagram r4a pdf download. What is the best refrigerant for high ambient temperature.
Tecumseh aea3430yxa replacement refrigeration compressor r4a 14 hp. Details about tecumseh aea3430yxa replacement refrigeration compressor r4a 14 hp. With the ac turned off on a cold day the pressure will be low, on a hot day the pressure will be high. R4a is also known as tetrafluoroethane cf3ch2f from the family of hfc refrigerant. Figure a15 nelsonobert generalized compressibility chart. C suctionbar ambient tempgr c dischargebar8,9 1,1 10,0 7,96,7 1,2 12,8 8,6. Ph diagram theoretical cycle archive refrigeration. Refrigerant r4a or hfc4a was developed to meet these needs. A comparison between refrigerants used in air conditioning. Results there are a few subtleties involved in quantifying tes. The low pressure service port lowside port is located in the line that runs from the compressor through the evaporator firewall and up to the condensor on the low pressure suction side of the system.
Generally the quantities of interest are the energy stored per degree temperature change per unit mass or unit volume. It is very easy to use and gives the basic cycle performance both graphically and in text form. Corresponding to the table of the property functions in chapter 1 you ptu distance education prospectus pdf have to call up the function. R4a recharge hoses will only fit on the low pressure service port on all r4a vehicles. The bubble to the left is the portion of the diagram where the refrigerant is in the saturated condition. Thermodynamic properties of r4a 1,1,1,2tetrafluoroethane. As an airconditioning refrigerant in newer automobiles, the optimal running pressure for r4a is between 22 and 57 pounds per square inch. How to convert an r12 to the r4a system it still runs. The system should be recovered, vacuumed min 20 minutes and charged. Fundamentals of refrigeration part 5 refrigerants refrigerants ph chart this diagram shows a simplified pressure enthalpy chart for a non specified refrigerant. Forane 4a, r4a, pressure temperature chart, pt chart, hvac, refrigeration, air conditioning, refrigerant gas created date. Push the high side retrofit r4a fitting over the old fitting and use a wrench to tighten. The previous two major problems of high pressure and high compressor temperature are found in fact to.
R4a has been found to have a gwp of 0 and in europe, within a few years, automobile air conditioning systems will be barred from using r4a as a refrigerant. The area contained within the envelope is for a liquid vapour mixture. Printable and fillable r4a pressure temperature chart. Po box, the heath, runcorn, cheshire, wa7 4qx tele. This page shows log ph diagrams for the following refrigerants. Pressureenthalpy chart, r4a 1,1,1,2tetrafluoroethane. Refrigerant 4a table pdf figure a14 ph diagram for refrigerant4a. This information has been fully checked for accuracy but is a guide only contact realcold staff for more information temp oc r12 r4a sp34e r409a r22 r410a r419a r407c r502 r404a r408a r507 kpa psig kpa psig kpa psig kpa psig kpa psig kpa psig kpa psig kpa psig kpa psig kpa psig kpa psig kpa psig. Now refer to the txv system charge level chart a or b pages 3 ptk pai sd pdf or 4 see note.