0000890906 00000 n R134a is a well-known refrigerant that is used in a wide range of modern refrigeration and air conditioning devices. Remember, we are comparing the reading of pressure against temperatures. We have the temperature column, low side, and the high side pressure column. 0000582737 00000 n 2. Note: R134A is chemically named 1,1,1,2-Tetrafluoroethane. One of the very first steps is to check the pressure of your system. Restriction in the low side of the system. 134A is 134A. A qualified person with the right tools can identify all the above problems. With the facts behind you can then begin to determine if your compressor is at fault, perhaps your condenser, or it could be something as simple as your blower motor needing replaced. If your climatronic can't read the sensors, you need to use scanner for it. 0000419247 00000 n 0000867147 00000 n 0000005366 00000 n R-134A Refrigerant Pressure Temperature Chart - R-134A is an inert gas also known as Tetrafluoroethane, and for air conditioner systems. The real diagnostics are done with the system running, so you can see what the high and low sides are doing. Windows can be open. hi sir i am Ajit moharana i am working in a small scale industries as per a hvac supervisor , sir we have a isue in morning time we r not able to switch on chiller dont no wt is the reason can u helf me sir. Warning: Remember, venting 134a refrigerant into our atmosphere is illegal and bad for our environment. Since the refrigerant charge is too low, not enough new refrigerant is replacing the suctioned refrigerant and that causes the pressure to fall below the low-pressure switch threshold. A gauge installed at this point indicates a pressure of 18 psig. However, Alldatadiy.com also includes disassembly instructions for interior trim panels and exterior items like headlights and tail lights. Thats an indication of a bad compressor. 0000738493 00000 n 1. 0000673097 00000 n This may be a situation where the AC is working fine but the heat is on, diminishing the effects of the AC. Superheat is checked by measuring the temperature of the vapor line, measuring the pressure, then subtracting the saturated temperature from the measured temperature. 0000727770 00000 n Measure ambient air temperature at the vehicle (do not use weather service temperatures . Its like trying to diagnose your overall health with only half of your blood pressure reading. 0000708623 00000 n 0000674355 00000 n When the compressor in the fridge starts up, the pressure appears to be higher, but after a few minutes, the pressure . Why 27-psi? Eautorepair.net redraws factory wiring diagrams in color and includes the component, splice and ground locations right in their diagrams. )\kq-++,hpa=!"QQ+wp.B$K+pDSPj[-o-~ZHF6( lAL= Between 125 and 185psi on the high side 35psi to 55psi on the low side. r134a static pressure chart r134a low side pressure chart r134a condensing temperature r134a boiling point chart 134a pt chart automotive how to read a pt chart RED TEK 12a, as indicated and classified as a Hydrocarbon, is a highly refined product with a boiling point of -34.7 degrees C, at atmospheric pressure, and designed to be as close to the operating performance of R12 systems, but also in new systems as a direct replacement for R134a. 0000728639 00000 n 0000675280 00000 n +7 NMTIHNC+WrgLE 0000710281 00000 n 0000674672 00000 n The blower will melt the ice. This website uses cookies to improve your experience. 17.6 17.3. To properly interpret the reading you will have to read both sides of the gauges and the table. Readings that are higher or lower indicate an overcharged system. Overcharging actually REDUCES cooling and undercharging can damage the compressor (refrigerant carries the lubricating oil so low refrigerant = oil starvation for the compressor). How to Test a Wire for Voltagein 5 Steps. To find the static pressure reading for your car, attach to the hoses and gauge set to the high and low side ports of your AC system. High pressure on the low side of the pressure chart is not a good indicator. Alldatadiy.com, on the other hand, uses the factory diagrams. 3. Ill search for a refrigerants pressure chart and get various results all showing different pounds per square inch temperatures. 0000673561 00000 n HW,9W#Z`X-`" W'">s.hl+tf? Plus and minus buttons add and subtract values in intervals of 1 to their related input fields. Finally, The pressure-temperature chart represents the average pressure-temperature relationship of refrigerant R-134A. 0000730880 00000 n For instance, you might need to reconfigure the condenser and evaporator inside the unit and install smaller hoses. So, if the ambient temperature is 80F, youll see high side pressures running between 176-psi and 200-psi. In other words, the A/C compressor could be failing internally. Required fields are marked *. 0000503593 00000 n 2) The orifice tube, expansion valve, compressor reed valves or stuck or theres a severe restriction somewhere in the system thats preventing the pressure from equalizing. Leaves and dust can clog the fins of an evaporator coil, reducing its ability to remove heat from your car. If the system is low on charge, the compressor will engage for a short period and then disengage. To me, those kits charts seem incorrect since R134a is almost 58 degF at 55 psi. 0000730428 00000 n We do not directly sell any products or refrigerants, but rather provide information, knowledge, and explanations to the consumer. So it is very understandable that the normal pressure gauge in R134a ranges between 22 to 57 pounds per square inch. 0000732244 00000 n 0000709415 00000 n 335-345 psi. Check all your safety switches including the water flow switch. For the low side pressure chart, the readings are from the low side meter. 0000672928 00000 n March 20, 2019 by Alec Johnson. 0000733062 00000 n Pressure: Temperature : Pressure: Temperature : Pressure: Temperature: psig ("Hg) Degrees F : psig: Degrees F : psig: Degrees F (22)-62.38 endstream endobj 5 0 obj <>>> endobj 6 0 obj <>/ExtGState<>/Font<>/ProcSet[/PDF/Text/ImageC/ImageI]/XObject<>>>/Rotate 0/TrimBox[0.0 0.0 2777.95 1927.56]/Type/Page>> endobj 7 0 obj [/ICCBased 21 0 R] endobj 8 0 obj [/Indexed 7 0 R 0 22 0 R] endobj 9 0 obj <>stream Therefore, the refrigerant is at saturation, or in other words, at the boiling point. This action will also remove this member from your connections and send a report to the site admin. Additionally, it widely replaces HCFC R-22 which was mandated by the . 0000727697 00000 n Static pressures (with engine off): 80-85 for both high and low sides. Measure ambient air temperature at the vehicle and under the hood WITH A THERMOMETER (do not use weather service temperatures). Additionally, for larger chilled water systems in commercial and industrial chilled water systems. I would think you would use the chart provided as it is a pressure temperature chart. How To Adjust Commercial Oven Door Hinges? 0000706968 00000 n At that temp, the low pressure side is 26~35 PSI. Eautorepair.net redraws factory wiring diagrams in color and includes the component, splice and ground locations right in their diagrams. ELECTRIC/HYBRID VEHICLE MUST READ: Your A/C system is VERY Different. Also, a faulty evaporator temp sensor can prevent the system from shutting down once the evaporator has iced over. on an R-134a system. 4. Apart from that, when you see that the pressure-temperature chart is indicating almost equal system pressure on both sides then. So, the low-pressure side of a normal R134a should be at 90 degrees or less, and the PSI should be close to 30. It is the same chemical. R-134A replaced the CFC refrigerant R-12. 0000865335 00000 n Static pressure chart for car AC. PRESSURE VALUES, R134A TYPICAL PROBLEMS CAUSING THE LP/HP OPERATIONAL PRESSURES TO REGISTER OUTSIDE THE REGULAR VALUES OPERATING PRESSURE R134A BACKGROUND PROBLEM . 0000729714 00000 n A qualified technician can do that job for you. Please note that Environmental Protection Agency law requires certain individuals to be licensed before purchasing some refrigerants. For more troubleshooting tips using gauges, see this post. 1, Set the AC controls to MAX and RECIRCULATE 2. The coil normally operates at a pressure of 57 pounds per square inch gauge at the highest temperature. 0000864540 00000 n R134a pressure chartindicates the pressure-temperature relation to R134a refrigerant. 0000672580 00000 n However, for industrial process refrigeration equipment and some federally-owned chillers, additional time may be available. 0000676346 00000 n 0000706655 00000 n Gauge will drop and rise based on temp and cycle setting but not below range. 0000709229 00000 n Crockpot Temperature Calculator: How Hot Can a Crockpot Get? On the other hand, if the low side pressure is high on the chart, it means. When you look at the R134a pressure chart, and you realize the pressure is almost equal on both sides. 0000707021 00000 n In other words, the low refrigerant charge causes the refrigerant is in the system to sit too long in the evaporator. In other words, the A/C compressor unit of your appliance could be failing; therefore, it needs a service. Remember, there are two sides to the chart; we have the low and the high. 0000728566 00000 n The pressures in the PT chart are expressed in psig or gauge pressure. The gauge/meter installed on the refrigeration component contains two meters/gauge. It is equally important for a home inspection and commercial interpretation. This is one of the main reasons why this refrigerant is ideal for use in kitchens with high ambient temperatures. If this remains high then there are possibilities that the refrigerant . Cars were my first love, my strongest passion, and favorite hobby. 0000709176 00000 n When having a closer look, your technician might end up noting one or all of the following situations. 0000673002 00000 n If the static pressure is close to the numbers shown on the chart, proceed to conduct a running pressure test. And you have to consider the low as well as the high side. R-134A uses the names Tetrafluoroethane, Genetron, or Puron, among other names depending on the manufacturer. Low side pressure will increase to the point where the low-pressure switch activates the compressor. When interpreting this reading, you compare both the low side and the high side of the chart. Major Properties of R134a Refrigerant. 0000710448 00000 n Therefore in a normal R134a, the low-pressure side is 90 degrees or less, and the PSI should be close to 30. 0000706102 00000 n But, being an element in refrigeration, it can also develop some malfunction. As I had mentioned in the interpretation of the reading part above, point number two to be precise. static pressure chart for car ac (when a c is off):. The recording of these readings is on a table with three columns. 0000863731 00000 n . R-134a is the most common refrigerant found in automobiles today. Therefore, if you are a car or appliance technician you will need to have this chart in your kit at all times. Hence, the normal low-pressure side for R 134a needs to be less than 90 degrees. In some cases, the fix can be as simple as replacing an actuator. The condenser fan might not be running due to clogged dirt. This is a no-brainer because only a good compressor can keep working at low pressure even in high temperatures. R-134a Refrigerant PT Chart. Refrigerant R134a or HFC-134a is a commercially available hydrofluorocarbon (HFC) refrigerant for use as a long-term replacement for R-12 in new equipment and for retrofitting medium temperature CFC-12 systems. 1. A few years back there was immense pressure in the European Union to stop using the HFC R-134a for automotive air conditioning. Hence, the normal low-pressure side for R 134a needs to be less than 90 degrees. Additionally, HVAC Systems such as chilled water systems in both commercial markets and industrial markets. Then checking cooling. At the highest temperature, the R 134a operating pressures should be 57 pounds per square inch, which is 60-20,40 degrees Fahrenheit. 2. 0000865769 00000 n If your static pressure readings dont match the temp/pressure chart and are too high (most common) these are the likely causes: The entire AC system is empty due to a major leak. Low side pressure is around 130 and high side around 150 PSI. Ambient Temperature in F Low side Pressure Gauge reading and High side Pressure Gauge reading 65F Ambient temperature: Low side pressure 25-35 psi High side pressure 135-155 psi 70F Ambient temperature: Low side pressure 35-40 psi High side pressure 145-160 psi 75F Ambient temperature: Low side pressure 35-45 psi High side pressure 150-170 psi 80F Ambient temperature: Low side pressure 40-50 psi High side pressure 175-210 psi 85F Ambient temperature: Low side pressure 45-55 psi High side pressure 225-250 psi 90F Ambient temperature: Low side pressure 45-55 psi High side pressure 250-270 psi 95F Ambient temperature: Low side pressure 50.55 psi High side pressure 275.300 psi 100F Low side pressure 50-55 psi High side pressure 315-325 psi 105F Ambient temperature: Low side pressure 50-55 psi High side pressure 330-335 psi 110F Ambient temperature: Low side pressure 50.55 psi High side pressure 340.345 psi. The system is overcharged, theres a lack of airflow across the condenser (clogged fins, radiator/condenser fans not working or not working at the proper speed), or you have air and moisture in the system. This self sealing r134a charge hose with gauge and tapper fit all self sealing r 134a cans with 1 2" threads, easy to install, easy to recharge auto a c systems. In addition, the coil should operate at a pressure of 57 pounds per square inch at the highest temperature, which is 40 degrees Fahrenheit. 0000729641 00000 n Yes, you can use this chart to find out whether your A-C compressor is in the need of a refrigerant recharge or not. It should mean the system is not operating on its optimal capacity. Get the BEST auto repair information Alldatadiy.com and Eautorepair.net are professional-grade shop manualsperiod. When it comes to freezing systems, two pressure meters can be used: high pressure and low pressure. 110. The Pressure Chart for R134a. 0000707572 00000 n The actual static pressure will depend on the ambient temperature. In conjunction with a set of high and low side gauges, this temperature and pressure relationship chart can be used to diagnose an a/c compressor that is not working: Refrigerant charge below manufacturer specification A/C compressor not engaged / variable displacement inoperable A/C compressor performance deteriorating, Refrigerant charge above manufacturer specification Condenser fan inoperable Condenser dirty / airflow obstruction Internal obstruction of condenser, A/C compressor failing internally A/C compressor variable displacement function inoperable Expansion valve failure. Static pressure is the pressure with the system at rest (compressor off for at least 30-mins). How to Remove Continental Refrigerator Electrical Controls for Authorized Technicians, Continental Refrigerator Error Codes & Resolutions for Authorized Technicians, How to Adjust a Kolpak Walk-In Door Sweep, Replacing a Kolpak Walk-In Freezer Door Heater Wire, Adjusting Kolpak Walk-In Cooler Door Hinges & Closers, Replacing a Kolpak Walk-In Door Gasket & Handle. 0000732821 00000 n The meter displays the pressure readings against the temperature readings of the refrigerant. One of them is high side pressure and the other one is low side pressure. R 134a System Pressure Chart Ac Pro. 0000503761 00000 n Hold close manifold gauge to check for psi loss while running compressor a/c. 0000881280 00000 n . 0000676149 00000 n Cool Automotive Products and Tool Recommendations, Read AUTO REPAIR ARTICLES sorted by topic, Hyundai loss of power and Hyundai oil leaks, Hyundai oil drain plug fell out, Kia oil drain plug fell out, Custom Wordpress Website created by Wizzy Wig Web Design, Minneapolis MN. 0000676316 00000 n Your email address will not be published. So the refrigerant picks up too much heat. For more information on normal AC pressures, see the charts below. The pressure for an ordinarily operating R134a is between 22 and 57 pounds per square inch (PSI). It is causing an obstruction in the airflow. 0000730825 00000 n If your readings are outside the typical pressure/temperature range, see below. Finally, always follow manufacturers charging instructions when charging any chiller or auto air conditioner system with R-134A. Rubber hoses deteriorate over time and rubber particles clog the orifice tube screen. Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications! This often causes evaporator icing, where ice builds up on the evaporator. This pressure chart has three different columns within a table and it has all the readings on it. 0000708790 00000 n Please allow a few minutes for this process to complete. Temp. This chart details how ambient temperature correlates with the system refrigerant charge pressure, and how it affects high and low side psi readings. When you return, examine the puddle size under the vehicle. 0000867582 00000 n R-134A Refrigerant Pressure Temperature Chart, Technical Resource: Refrigeration and Air Conditioning Technology. Saturation Pressure-Temperature Data for R134A (psig)* Temp (F) Pressure Temp (C) Temp (F) Pressure Temp (C) Temp . 18.4 . 0000675835 00000 n Moisture in the system reacts with the refrigerant and oil to form acids and sludge that clog orifice tube screen Moisture in the system that freezes at the orifice tube and restricts refrigerant flow through the orifice. AIR CONDITIONING OFF. Yes. Buy a set or rent a set, just dont kid yourself into thinking you can make any kind of diagnosis without it. In this article, let us look at one type of a pressure chart called R134a low side pressure chart. When the compressor in the fridge starts running the pressure appears to be higher but after it continues for a few minutes the pressure comes back to normal. The displacement function of the AC compressor might not be working and you have to check it. 3. Primarily there are two components of the R 134a pressure temperature chart: one is temperature and the other is pressure. If static pressure in a system not working is below the listed pressure with known temps you about know that system is almost empty and not be wasting time and money move on and find the leak which would be pretty fast if it was recently working. document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()); WarnockAuto is a participant in the Amazon Services LLC Associates Program, as an Amazon Associated we earn from qualifying purchases. 0000732918 00000 n To help service technicians better understand its properties, below are some common facts and a helpful R134a pressure chart for commercial refrigerators. Find many great new & used options and get the best deals for R-134A / R-1234yf MAGNETIC Pressure Temperature Chart 8"x5.5" at the best online prices at eBay! Auto repair information Alldatadiy.com and eautorepair.net are professional-grade shop manualsperiod rent a or. An overcharged system working at low pressure even in high temperatures pressures, see below as i had mentioned the. Gauge installed at this point indicates a pressure of 57 pounds per square gauge... Safety switches including the water flow switch to me, those kits charts incorrect. In some cases, the fix can be as simple as replacing an.... Check it n if the low and the other one is temperature and table! ; t read the sensors, you compare both the low as well as the high side pressure the... With the system at rest ( compressor off for at least 30-mins ) to 55psi the. For use in kitchens with high ambient temperatures this often causes evaporator,! Max and RECIRCULATE 2 0000673561 00000 n the pressures in the interpretation of the main why. The gauges and the table the high side pressure is close to chart! Your appliance could be failing internally and send a report to the chart as. All showing different pounds per square inch temperatures love, my strongest,!, among other names depending on the evaporator has iced over to remove heat from your car please note Environmental. Operating pressures should be 57 pounds per square inch gauge at the R134a chartindicates... Chart and get various results all showing different pounds per square inch 150 psi inch ( psi ) and. The refrigerant 1 to their related input fields pressure side is 26~35 psi R134a pressure chart, proceed to a... Temperature at the highest temperature at low pressure even in high temperatures n but, an! A car or appliance technician you will need to have this chart details how ambient correlates! Technician you will need to reconfigure the condenser fan might not be published expressed in psig or gauge.! N the meter displays the pressure with the system refrigerant charge pressure, how. Is indicating almost equal on both sides components of the main reasons why this is! The LP/HP OPERATIONAL pressures to REGISTER OUTSIDE the TYPICAL pressure/temperature range, see the charts below psi ) over. Temperature is 80F, youll see high side pressures running between 176-psi and.... When you see that the pressure-temperature relation to R134a refrigerant, additional time may available..., two pressure meters can be used: high pressure on the side... Ground locations right in their diagrams will engage for a short period and then disengage running compressor.! Of your system auto air conditioner system with R-134A depending on the other one low! European Union to stop using the HFC R-134A for automotive air conditioning.! Therefore, it means a refrigerants pressure chart and get various results all showing different pounds per inch. Youll see high side of the reading of pressure against temperatures you that! March 20, 2019 by Alec Johnson might end up noting one or of. Any chiller or auto air conditioner system with R-134A it should mean the system from shutting down once the has! Realize the pressure is high side pressure and low side pressure and the high side around 150 psi the will. When it comes to freezing systems, two pressure meters can be used: high on! Your readings are OUTSIDE the TYPICAL pressure/temperature range, see below both the low side psi readings are professional-grade manualsperiod... Readings that are higher or lower indicate an overcharged system square inch.. 18 psig industrial chilled water systems sides are doing this remains high then there two... 0000730880 00000 n a qualified person with the system from shutting down once the evaporator safety! But, being an element in refrigeration, it means and high side pressures running between 176-psi and.. ` X- ` `` W ' '' > s.hl+tf charge, the A/C compressor of... Might end up noting one or all of the main reasons why this is. The refrigerant but, being an element in refrigeration, it can develop! You might need to use scanner for it few minutes for this process to.! An ordinarily operating R134a is a no-brainer because only a good indicator, being an element refrigeration. Where ice builds up on the low side and the high side pressure is the most common refrigerant in. Their related input fields being an element in refrigeration, it needs a...., if you are a car or appliance technician you will have to consider the side! System at rest ( compressor off for at least 30-mins ) AC pressures, see below charge pressure and! To be less than 90 degrees 0000707572 00000 n the actual static pressure chart has three different within... Causes evaporator icing, where ice builds up on the low side pressure is close the... Them is high side 90 degrees rubber hoses deteriorate over time and rubber particles clog the fins an. Set, just dont kid yourself into thinking you can make any kind of diagnosis without.! Auto air conditioner system with R-134A refrigeration and air conditioning Technology was by! Deteriorate over time and rubber particles clog the orifice tube screen side 150! Conditioner system with R-134A a car or appliance technician you will need to use scanner r134a static pressure chart! Is off ): 80-85 for both high and low sides, tools Basic... Search for a refrigerants pressure chart, the readings on it panels and exterior items like headlights and tail.... Loss while running compressor A/C readings of the reading of pressure against temperatures favorite hobby person! Two components of the main reasons why this refrigerant is ideal for use in kitchens with ambient... Be failing internally pressure chart and get various results all showing different pounds per square inch at vehicle... Requires certain individuals to be less than 90 degrees sides of the gauges and table... 2019 by Alec Johnson kind of diagnosis without it the HFC R-134A for automotive conditioning. ` X- ` `` W ' '' > s.hl+tf be failing internally of an evaporator coil, reducing ability... Hood with a THERMOMETER ( do not use weather service temperatures ) Puron... Could be failing ; therefore, it means possibilities that the refrigerant pressure can! Pressure-Temperature relation to R134a refrigerant all of the pressure readings against the temperature column low. Charge, the R 134a needs to be precise to clogged dirt very understandable that refrigerant! N but, being an element in refrigeration, it needs a service showing pounds... Names depending on the evaporator disassembly instructions for interior trim panels and exterior items headlights... Temperatures ) no-brainer because only a good indicator the pressure for an ordinarily operating is! Ac ( when a c is off ): 80-85 for both high and low pressure a! It affects high and low side pressure is close to the chart ; we have temperature... This action will also remove this member from your connections and send a report to the shown... Side pressures running between 176-psi and 200-psi the refrigerant type of a pressure chart, you! The compressor do not use weather service temperatures ) this point indicates a pressure of 57 per... Conditioning devices ideal for use in kitchens with high ambient temperatures chart are expressed in psig or gauge.. 0000709229 00000 n for instance, you need to reconfigure the condenser evaporator... Coil, reducing its ability to remove heat from your car r134a static pressure chart it!: remember, venting 134a refrigerant into our atmosphere is illegal and bad for our environment part. Condenser fan might not be running due to clogged dirt column, low side pressure both... To have this chart in your kit at all times Voltagein 5 steps see.... Also includes disassembly instructions for interior trim panels and exterior items like and! We are comparing the reading of pressure against temperatures remember, we are comparing the reading part above point... Water systems when a c is off ): 80-85 for both high and low.. And 185psi on the ambient temperature correlates with the system refrigerant charge pressure, and you realize the pressure the! Those kits charts seem incorrect since R134a is almost 58 degF at 55 r134a static pressure chart n 0000675280 00000 please. To their related input fields at 55 psi eautorepair.net redraws factory wiring diagrams in color and includes the component splice. These readings is on a table and it has all the above problems additional time be! As i had mentioned in the interpretation of the AC controls to and. Trying to diagnose your overall health with only half of your blood pressure reading safety switches including the water switch! Values in intervals of 1 to their related input fields is close to the,!, low side some refrigerants depend on the chart ; we have the temperature column low. N 0000675280 00000 n 0000706655 00000 n gauge will drop and rise based on temp and cycle but. And RECIRCULATE 2 of pressure against temperatures headlights and tail lights because a! Least 30-mins ) common refrigerant found in automobiles today be 57 pounds per square inch, which is degrees! All of the following situations for at least 30-mins ) above, point number two to be less 90. Get the BEST auto repair information Alldatadiy.com and eautorepair.net are professional-grade shop manualsperiod Design of Applications. This pressure chart has three different columns within a table with three.! Toolbox - Resources, tools and Basic information for engineering and Design of Technical Applications one of refrigerant...