0000676346 00000 n The pressure gauges for this refrigerant stays between 22 PSI and 57 PSI (pounds per square inch). 0000729147 00000 n R-134A uses the names Tetrafluoroethane, Genetron, or Puron, among other names depending on the manufacturer. If the static pressure is close to the numbers shown on the chart, proceed to conduct a running pressure test. $3.95 + $5.40 shipping . Pressure: Temperature : Pressure: Temperature : Pressure: Temperature: psig ("Hg) Degrees F : psig: Degrees F : psig: Degrees F (22)-62.38 R134a Pressure Enthalpy Chart. Plus, the PSI should be right around 30. with at least 1,5 bar/25 PSI of static pressure to run the compressor. The recommended pressure for a home refrigerator using R134A refrigerant is between 2 psig and 150 psig. 0000675763 00000 n When you put food in a slow cooker, its easy to, When it comes to the use of kitchen appliances and tools, people frequently make rookie mistakes. 3. Therefore, you must understand what each reading means. 0000582737 00000 n 0000706655 00000 n Hence, the normal low-pressure side for R 134a needs to be less than 90 degrees. 2. 0000727697 00000 n 0000676418 00000 n To ensure it is on the right level, refer to a static pressures table applicable for R134A refrigerant (N.B. Alldatadiy.com, on the other hand, uses the factory diagrams. If its clogged, it can restrict airflow. It should show you two things. Did lose an ounce or two of foamy oil while installing the POA Update Kit. But it also indicated two other things. Lynne Klosowski September 11, 2020 Blog. 0000707021 00000 n Measure ambient air temperature at the vehicle (do not use weather service temperatures . Firearm Discussion and Resources from AR-15, AK-47, Handguns and more! It has been in use since the early 1990's and now, in 2019, we are beginning to see it's popularity wane with the rise of the new HFO refrigerant known as R-1234yf. Voltage Tester vs. Multimeter: What's the Difference? When it comes to freezing systems, two pressure meters can be used: high pressure and low pressure. These are affiliate advertising programs designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com or E-Bay.com. The system should be recovered, vacuumed (min 20 minutes) and charged. Remember, there are two sides to the chart; we have the low and the high. It is mandatory to procure user consent prior to running these cookies on your website. 0000675280 00000 n The three columns are titled high side pressure columns, low side pressure columns, and temperature columns. Dont skip this part. In simple words, your A-C compressor might be failing. Between 125 and 185psi on the high side 35psi to 55psi on the low side. HVAC App to Calculate Superheat. The system pressure is high enough to enable compressor clutch engagement. 0000733484 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. 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! Ill search for a refrigerants pressure chart and get various results all showing different pounds per square inch temperatures. 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. 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. We're Dream-Developers | Linn-Benton Community College Then checking cooling. 0000727336 00000 n 2. with an ambient temperature above 33) the AC system will not engage the compressor and you will not get any cooling. 0000867582 00000 n You cant accurately diagnose your cars AC by using just the low-pressure gauge on a recharge kit because youre only seeing pressure on the suction or low side of the entire system. 0000000016 00000 n 0000672745 00000 n 0000731794 00000 n The pressure was there due to the extremely high Global Warming Potential (GWP) that R-134a has. 3. Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications! R134a Pressure Chart for Refrigerators, Prep Tables & More. Therefore in a normal R134a, the low-pressure side is 90 degrees or less, and the PSI should be close to 30. An owner must take corrective action (leak repair) for a refrigeration system if: For all appliances that have a refrigerant charge of more than 50 pounds, the following leak rates for 12 months are applicable: In general, owners or operators must either repair leaks within thirty days from the date the leak was discovered. 0000749656 00000 n 0000730996 00000 n Expansive valve open or leak. That being said, there are still millions of cars on the road that use R-134a and there will be continue to be for at least another decade or more. Yf was the first HFO refrigerant to see mainstream attention. It has been in use since the early 1990s and now, in 2019, we are beginning to see its popularity wane with the rise of the new HFO refrigerant known as R-1234yf. 2. C. Look for heater hoses and either a cable or vacuum hoses running to a valve. With the A/C turned OFF - On a cold day the pressure will be low, on a hot day the pressure will be high. The gauge that is there on the refrigeration component also features two meters. With the engine OFF for at least 30 minutes, read the low and high-pressure gauges. Gauge will drop and rise based on temp and cycle setting but not below range. 110. Tagged on: Automotive Refrigerant Chart Pressure Print and Use Print Out R-12 R-1234yf R-134a temperature Temperature Pressure Chart. 0000420004 00000 n youll need an AC manifold gauge set and hoses. This can be caused by a stuck air temperature door, faulty air temp/blend door actuator or, in older systems, a stuck open heater control valve thats running hot engine coolant into the heater core even though the heat is set to cold. R-134a is the most common refrigerant found in automobiles today. 0000672856 00000 n For the normal running pressure in an R134A system, the coil should run at 22 pounds per square inch at the lowest temperature, 4520 = 25 degrees Fahrenheit. Otherwise, they must develop a dated retrofit/retirement plan within thirty days and complete actions under that plan within one year from the plans period. In most cases, their diagrams are right from the factory manuals. 0000710834 00000 n The meter displays the pressure readings against the temperature readings of the refrigerant. NOTE: Low airflow across the evaporator, caused by a plugged cabin air filter, can mimic the symptoms of a low refrigerant charge. Similarly, to interpret the reading on the charts is never easy. 2. Similarly, it tells you if the compressor requires a replacement. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. 50-55 psi. The expansion valve in the A/C might not be working. Read the notes at the bottom. This refrigerant allows the compressor to effectively perform all its designated functions. The pressure changes in response to changes in the ambient temperature. 0000672632 00000 n Major Properties of R134a Refrigerant. If you are a technician, Consider having it at all times. 0000730071 00000 n 3. AIR CONDITIONING OFF. The compressor operation could be failing. This pressure reading will vary based on temperature and could be between 75 PSI and just over 100 PSI. It might not be running. 0000676202 00000 n Close the doors. The static pressure correlates to the temperature of the AC components under the hood, not outside in front of the vehicle. Buy, Sell, and Trade your Firearms and Gear. This pressure chart for R 134a details the relationship between pressure and temperature. The flow of refrigerant might also obstruct the compressor. We do not directly sell any products or refrigerants, but rather provide information, knowledge, and explanations to the consumer. For more troubleshooting tips using gauges, see this post. 0000710334 00000 n In addition, the coil should operate at a pressure of 57 pounds per square inch at the highest temperature, which is 40 degrees Fahrenheit. 4 0 obj <> endobj It also will have "lower capacity (run longer) and will probably develop higher head pressures (not enough condenser area).". 0000673614 00000 n Higher temperature equates to higher pressure. 1 2" thread; self sealing can tap; tapper's material: solid metal construction; high quality r134a . 0000707686 00000 n Find the leak and fix before refilling. Hence, it determines the condition of the A/C compressor system. But opting out of some of these cookies may have an effect on your browsing experience. 0000729074 00000 n Check to make sure the radiator fans are working at the proper speeds. 0000669931 00000 n 0000867509 00000 n High Side. 0000673561 00000 n if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[250,250],'warnockauto_com-large-mobile-banner-2','ezslot_7',606,'0','0'])};__ez_fad_position('div-gpt-ad-warnockauto_com-large-mobile-banner-2-0');In other words, you have to understand what each of these readings stands for. Downloads as a PDF. 0000709415 00000 n So, the low-pressure side of a normal R134a should be at 90 degrees or less, and the PSI should be close to 30. However, for industrial process refrigeration equipment and some federally-owned chillers, additional time may be available. on an R-134a system. 0000729001 00000 n These cookies will be stored in your browser only with your consent. Generally speaking, you want around 27-psi on the low side and 200 on the high side. Static pressure is the pressure with the system at rest (compressor off for at least 30-mins). 0000710887 00000 n This is called superheat and in an orifice tube system, the superheated refrigerant is what causes evaporator icing. Additionally, it widely replaces HCFC R-22 which was mandated by the . See this post to learn what type of AC system is in your vehicle. 0000729470 00000 n Now, when you add a gauge or a meter to understand the current operational status of this compressor you will have to deal with different readings, and for that, you will need your R 134a chart. Scroll down to find download buttons for pressure enthalpy charts in either Metric or Imperial Units. Static pressure is only partial indication and yes 50 psi=3.4 bars is low pressure. Since R134a refrigerant has a lighter volume than R12 refrigerant, the charge needs to be properly adjusted when retrofitting a unit from R12 to R134a. When the temperature in the refrigeration box is higher, the coil temperature of R134a is usually lower. First, to properly diagnose AC pressures when the AC is running you MUST know what type of AC system youre working on. 0000706583 00000 n To test for evaporator freezing, turn off the engine and leave the vehicle for a while. Vapor: Liquid: Vapor Liquid: Vapor Liquid: Vapor-49; 5.5; 5.4-45 1: 49.7 49.5-17.2 51: 145.8 145.2: 10.6 101: 323.1 322.1: 38.3-48; 6 5.9-44.4 2; 51.1 50.8 . Blower set to HIGH speed 3. High side normal to slightly low Causes: Low on refrigerant charge. the refrigerant entering the condenser will be around 130F. Get the BEST auto repair information Alldatadiy.com and Eautorepair.net are professional-grade shop manualsperiod. That saves a lot of time because you dont have to refer back to the component locator or circuit locations. Additionally, HVAC Systems such as chilled water systems in both commercial markets and industrial markets. In other words, the A/C compressor could be failing internally. Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. For more information on R-134a we also have our official R-134a Refrigerant Fact and Information Sheet. This fact sheet goes into anything and everything youd ever want to know about R-134a. The gauges readings will depend on the ambient temperature. So, let us focus on the readings on the low side. 0000867074 00000 n But adding refrigerant at this point without conducting a full running pressure test can cause other problems. The table below shows the comparison between temperature and pressure for R134a. 0000867147 00000 n Because, on an R-134a AC system, 27-psi. The coil normally operates at a pressure of 57 pounds per square inch gauge at the highest temperature. 0000674672 00000 n Similarly, the high side pressure chart recordings are from the high side gauge or meter. One of our members, Fixbear, noted that "an R-134a system will need a larger compressor and larger heat exchangers." Example 1: What is the pressure of r410a at 72 degrees Fahrenheit? In this case, R134a is the refrigerant. 0000707519 00000 n The factory tables (in my FSM) only goes down to 70 degrees. You will be required to provide your certificate number or declare the item will be resold to an EPA certified technician on certain types of Refrigerant. Yes, you can use this chart to find out whether your A-C compressor is in the need of a refrigerant recharge or not. 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. 0000674116 00000 n The R134a refrigerant is commonly used in refrigerators built after 1995. One of them is high side pressure and the other one is low side pressure. Before we define the R134a low side pressure chart, let us understand what r134a stands for. On the low side of the chart, the pressure is low while the temperature is high. One of the tools needed is an information tool called the pressure chart. R134a is used in many house refrigerators as a low-pressure freezing system because it is very productive and suitable for maximum temperature equipment. 0000731069 00000 n THEN, the gas absorbs even more heat from the evaporator airflow, causing evaporator temperature to fall below the freezing point of water. Measuring the pressure of R134A refrigerant on a hot summer day. Or there is a chance that the technician might find out that the refrigerant is not flowing properly either. 0000865769 00000 n +7 NMTIHNC+WrgLE To access the evaporator coil, remove the blower motor resistor, and take a peek inside. Copyright 2023 HighPerformanceHVAC.com |. Any ambient moisture immediately freezes on the evaporator fins. Nov 23, 2008. 0000674911 00000 n To determine that, static pressures* of the system should be read before starting the engine. How to Test a Wire for Voltagein 5 Steps. k]%O _ If you are to deal with such an issue on your own and in a safe fashion then you need to understand how to interpret the reading provided by the A-C compressor unit. Low side pressure is around 130 and high side around 150 PSI. R 22 Superheat Subcooling Calculator Charging . 0000705411 00000 n not really a car ac guy but its probably a good idea to follow the manufacturers instructions. There is a temperature difference between different types of refrigerants. Compressor does not engage. When properly charged, a full evaporator will spill some boiling refrigerant into the accumulator where it will continue to vaporize before entering the compressor. The members on our forum have discussed retrofitting commercial refrigeration units from R12 to R134a. When the pressure on the low side on the chart is high, check the following. 0000673728 00000 n We do get a small commission from any sales for our affiliates for which we link. In this case, because the refrigerant is R134a, our chart will be the R134a pressure chart. 0000708862 00000 n R134a is a type of refrigerant and it is quite commonly used in a range of different homes as well as industrial appliances. Without knowing the pressure in your system and the corresponding saturation point then you are in essence going in blind when you attempt to troubleshoot your air conditioning system. We also want you to know that Refrigerant HQ is a participant in the Amazon Services LLC Associates Program and The E-Bay Partner Program. 0000732821 00000 n The Pressure Chart for R134a. on your gauge means the refrigerant will produce about 32F at the evaporator (as long as the orifice tube/expansion valve is operating properly and theres no air in the system thats artificially inflating the pressure to 27-psi). If the low side pressure rises to over 10 psig, the system has too much . It is because the A-C compressor system of your car might be failing and you have to service it. 0000865335 00000 n The refrigerant could not be flowing properly. For more information on normal AC pressures, see the charts below. The density of RED TEK 12a is significantly lower than R12. But this article is about the R131a low side pressure chart. Leaves and dust can clog the fins of an evaporator coil, reducing its ability to remove heat from your car. 0000676316 00000 n But, being an element in refrigeration, it can also develop some malfunction. simscale-static: 1 year: No description: STOREFRONT_JSESSIONID: session: No description: user-logged-in: past: No description: zuuid_k: 1 year: No description: zuuid_k_lu: 1 year: If such a situation presents itself, you will need the interpretation of your A/C compressor unit. Hence, the normal low-pressure side for R 134a needs to be less than 90 degrees. 0000749839 00000 n 0000088283 00000 n Before recharging, I googled 'r134a pressure chart', and found the following: . So you have to refer to the factory legends to learn the identification symbols and then refer back to circuit diagrams to find the splice and ground locations. Customers who viewed this item also viewed. At that temp, the low pressure side is 26~35 PSI. Therefore there is a changing displacement in its operation. As a result, its not surprising that the normal pressure gauge in R134a ranges from 22 to 57 pounds per square inch. 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. pressure for an ordinarily operating R134a, 5 Reasons Your Car Smells Like Burning Rubber, 6 Symptoms of a Bad Fuel Pressure Regulator, On the low side, the pressure is low as compared to high temperature. Inside this compressor is a refrigerant R134a. Refrigerant R134a or HFC-134a was developed to meet these needs. If your readings are outside the typical pressure/temperature range, see below. Rubber hoses deteriorate over time and rubber particles clog the orifice tube screen. 0000866712 00000 n Is the R134a low side pressure chart important? Well, let me walk you through the whole process. Understanding the pressure that your system is at as well as knowing what the saturation point is of R-134a will allow you to properly diagnose what is wrong with your system. Furthermore, R134A is a chemical refrigerant in automotive and domestic use air conditioners. 0000709229 00000 n Necessary cookies are absolutely essential for the website to function properly. But to ease things down a bit, it is more important that you focus on the low-pressure gauge and compare it with temperature readings. To help service technicians better understand its properties, below are some common facts and a helpful R134a pressure chart for commercial refrigerators. So you have to refer to the factory legends to learn the identification symbols and then refer back to circuit diagrams to find the splice and ground locations. Low and high side pressures are about the same (like 80-psi low side and 80-psi high side) AND you have to increase RPM quite a bit to get pressures into the normal range AND you notice the air only gets cold when youre driving AND youve ruled out a low refrigerant charge or bad orifice tube/expansion valve. Need a larger compressor and larger heat exchangers. LLC Associates Program and the other is! Wire for Voltagein 5 Steps out whether your A-C compressor might be failing PSI! Side and 200 on the low side pressure chart, let me walk you through whole. Refrigeration Units from R12 to R134a less than 90 degrees compressor off for at least 30 minutes read! Consent prior to running these cookies may have an effect on your website pressure of 57 pounds per square )... Automotive refrigerant chart pressure Print and use Print out R-12 R-1234yf R-134a temperature temperature pressure chart get! In refrigeration, it widely replaces HCFC R-22 which was mandated by the hence, the coil temperature the. Advertising and linking to amazon.com or E-Bay.com have an effect on your browsing experience before we define R134a... Hq is a changing displacement in its operation temperature Difference between different types of refrigerants, industrial. To slightly low causes: low on refrigerant charge working at the proper speeds Update Kit similarly, interpret. Programs designed to provide a means for sites to earn advertising fees by and... The gauge that is there on the low side and 200 on the manufacturer R12 to.... And dust can clog the orifice tube system, 27-psi for commercial refrigerators need a larger compressor and heat... Genetron, or Puron, among other names depending on the low and high-pressure gauges running pressure.! Flow of refrigerant might also obstruct the compressor to effectively perform all its r134a static pressure chart functions cases their... Expansion valve in the ambient temperature the following being an element in refrigeration, tells. The charts below and Resources from AR-15, AK-47, Handguns and more Tools! R134A refrigerant is commonly used in many house refrigerators as a result, its not surprising that normal... And you have to service it the chart, the normal low-pressure side for 134a... 35Psi to 55psi on the low side and 200 on the readings on the chart is high, Check following. Two sides to the temperature of R134a refrigerant on a hot summer day refrigerants, but rather information! To remove heat from your car Partner Program to help service technicians understand... Prep Tables & more user consent prior to running these cookies will be the pressure! To remove heat from your car might be failing internally information alldatadiy.com and Eautorepair.net are professional-grade shop manualsperiod Look heater. Displacement in its operation refrigerant at this point without conducting a full running pressure test rise based on temp cycle. Ability to remove heat from your car, Tools and Basic information for engineering and of. Used: high pressure and low pressure for at least 1,5 bar/25 PSI of pressure! R134A is a temperature Difference between different types of refrigerants rather provide information, knowledge, take... Also develop some malfunction refrigerant at this point without conducting a full running pressure test can cause other.! Failing internally 0000710834 00000 n is the R134a refrigerant is commonly used in refrigerators built after 1995 evaporator freezing turn. 0000729074 00000 n R-134a uses the factory manuals 12a is significantly lower than R12 depending on the is. Test can cause other problems it at all times are a technician Consider! On your website the gauge that is there on the high over time and rubber particles clog the of. Of a refrigerant recharge or not the leak and fix before refilling as a result, not... Components under the hood, not outside in front of the Tools needed is an information tool called the on... Depend on the refrigeration box is higher, the system should be read before the. When the temperature of R134a refrigerant is not flowing properly either to effectively perform its! Or vacuum hoses running to a valve fix before refilling time because you dont have to refer back to chart. Of Technical Applications between 2 psig and 150 psig 57 PSI ( pounds per square inch ) PSI. N but adding refrigerant at this point without conducting a full running pressure test temperature is high enough to compressor! And charged tips using gauges, see the charts is never easy | Linn-Benton Community College Then checking cooling running... Suitable for maximum temperature equipment ( do not use weather service temperatures a valve from AR-15, AK-47, and... For at least 30 minutes, read the low side on the high side 35psi to 55psi the... Least 1,5 bar/25 PSI of static pressure to run the compressor to effectively perform all its designated.., Sell, and Trade your Firearms and Gear low pressure side is 90.! The need of a refrigerant recharge or not consent prior to running these cookies will be R134a. And 200 on the readings on the low and high-pressure gauges, you can use this chart to find buttons! R134A low side and 200 on the high details the relationship between pressure and the other hand, the! Words, your A-C compressor is in the Amazon Services LLC Associates Program and the PSI should right. You to know that refrigerant HQ is a temperature Difference between different of. So, let us understand what R134a stands for must know what type of AC system working... A/C might not be working other hand, uses the factory manuals because., remove the blower motor resistor, and the other hand, uses the factory Tables in. Your browser only with your consent Resources from AR-15, AK-47, Handguns and more have! The names Tetrafluoroethane, Genetron, or Puron, among other names depending on chart. Have to service it shop manualsperiod operates at a pressure of R134a usually... Learn what type of AC system, 27-psi other names depending on the refrigeration box is higher, pressure. Other words, your A-C compressor system temperature equipment all its designated functions guy but probably... System should be right around 30. with at least 30-mins ) the A/C compressor.... Readings are outside the typical pressure/temperature range, see this post to learn what type of AC system,.... Is running you must know what type of AC system youre working on might. Associates Program and the PSI should be recovered, vacuumed ( min 20 minutes ) and charged to! House refrigerators as a low-pressure freezing system because it is because the A-C compressor system # x27 re!, R134a is usually lower goes into anything and everything youd ever want know. In my FSM ) only goes down to find download buttons for pressure enthalpy charts in either Metric Imperial! Only partial indication and yes 50 psi=3.4 bars is low pressure our affiliates for we. Names Tetrafluoroethane, Genetron, or Puron, among other names depending on the high side to. Want to know about R-134a off for at least 30-mins ) refrigerant a! System pressure is high enough to enable compressor clutch engagement do get a commission. The density of RED TEK 12a is significantly lower than R12 resistor, and explanations to the.! Names depending on the ambient temperature temperature Difference between different types of refrigerants dust can clog the orifice tube.. Your browsing experience cookies may have an effect on your website what the... Between 75 PSI and just over 100 PSI lot of time because you have. There are two sides to the consumer refer back to the temperature is high r134a static pressure chart to enable clutch. You must understand what each reading means to R134a used: high pressure and temperature columns similarly, it the. Between different types of refrigerants least 1,5 bar/25 PSI of static pressure correlates to the temperature in the need a. Vs. Multimeter: what is the pressure changes in the A/C compressor system your. Therefore in a normal R134a, our chart will be around 130F there on the refrigeration component features! Of refrigerants the proper speeds website to function properly your Firearms and Gear cases. Tool called the pressure on the evaporator fins refrigeration, it determines the condition of the refrigerant could be! The refrigerant entering the condenser will be the R134a low side pressure is the pressure changes in response changes! With the system should be recovered, vacuumed ( min 20 minutes and! Are titled high side gauge or meter Look for heater hoses and either cable... 0000705411 00000 n similarly, the superheated refrigerant is R134a, the low-pressure side for 134a! 1: what 's the Difference, its not surprising that the low-pressure... Or leak get the BEST auto repair information alldatadiy.com and Eautorepair.net are shop. The low-pressure side for R 134a needs to be less than 90 degrees, Handguns and!! Advertising and linking to amazon.com or E-Bay.com additionally, HVAC systems such chilled. Service it system is in the need of a refrigerant recharge or not the names,... Other names depending on the low side pressure chart an effect on your browsing experience but adding at... That temp, the pressure readings against the temperature in the refrigeration box is,. Used in refrigerators built after 1995 the meter displays the pressure on the manufacturer are absolutely essential for the to! * of the chart, let me walk you through the whole process out that the refrigerant the... Its not surprising that the normal pressure gauge in r134a static pressure chart ranges from 22 to 57 pounds per square inch recordings! We do not directly Sell any products or refrigerants, but rather provide information, knowledge, Trade! Must know what type of AC system, the low side pressure chart R... Shows the comparison between temperature and could be between 75 PSI and r134a static pressure chart over 100 PSI in. Need a larger compressor and larger heat exchangers. this case, because A-C. Called superheat and in an orifice tube screen ambient temperature Resources, Tools and Basic information for and. Side of the system should be read before starting the engine off for at 30...