r134a static pressure chart

The table helps inspect, identify, and solving problems arising from the readings. 0000749656 00000 n %%EOF 0000004358 00000 n On a closer look, the technician should be able to note the following. For example, a restricted orifice tube will cause the compressor to suck, but the restriction/clog in the orifice tube prevents the full flow of refrigerant, causing evaporator starvation. 0000710448 00000 n Commercial Foodservice Equipment Repair and the Right to Repair Act, 8 Mistakes to Avoid as a Repair Technician, Best Automatic Wire Strippers for Technicians in 2023, 7 Types of Electrical Testers & Their Uses, 5 Best Wire Strippers for Technicians for 2023, 7 Best Electrician Pliers for Technicians in 2023, Best Oscillating Tools for Technicians in 2023, Best Power Tools for Electricians in 2023, A Fast & Easy Guide on How to Calibrate a Multimeter, Master How to Use Wire Strippers in 7 Steps or Less, Discover How to Find a Ground Wire in 4 Different Ways, Air Tools vs. Electric Tools: Discover 5 Pros & Cons, How to Measure Current with a Multimeter in 5 Steps. However, ambient humidity also affects how your cars AC works because high humidity changes how the heat transfers. The technician uses this chart to determine whether the A/C compressor needs a refrigerant recharge. 0000710520 00000 n 0 0000725975 00000 n with at least 1,5 bar/25 PSI of static pressure to run the compressor. There is no difference. 0000866204 00000 n Remember, the measure is against pressure. 0000729641 00000 n Before we define the R134a low side pressure chart, let us understand what r134a stands for. 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. R-134A is a refrigerant frequently used in automobile air conditioning. Plan was to add some back in, along with leak detector, after the first can of R134a but didn't get that far. Did lose an ounce or two of foamy oil while installing the POA Update Kit. Generally speaking, if the static pressure reading is below that listed on the temperature/pressure chart, you can assume the system is low on charge. Fitting of a gauge /meter helps to understand the regular operation of this component. 3. 0000000016 00000 n Use a hand pump vacuum to operate the valve or move the cable by hand to close it off. Close the doors. AIR CONDITIONING OFF. 0000711087 00000 n 0000706583 00000 n To determine that, static pressures* of the system should be read before starting the engine. In this article, let us look at one type of a pressure chart called R134a low side pressure chart. 0000872493 00000 n It will allow you to read and interpret the pressure-temperature chart more effectively. We also believe the products we link to help our site visitors find products they need to enhance or repair their HVAC equipment. 0000707758 00000 n With the engine OFF for at least 30 minutes, read the low and high-pressure gauges. In some cases, the fix can be as simple as replacing an actuator. Buy, Sell, and Trade your Firearms and Gear. It might also be said that the superheat is zero and the subcooling is zero. 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. Finally, always follow manufacturers charging instructions when charging any chiller or auto air conditioner system with R-134A. We have a low-pressure gauge and the high-pressure gauge. Additionally, it widely replaces HCFC R-22 which was mandated by the . Measure ambient air temperature at the vehicle (do not use weather service temperatures) WITH A THERMOMETER. 0000733871 00000 n The A/C compressor system is not engaged. 74 Abundant R134a Static Pressure Chart; How To Read A Pressure Temperature Chart For Super R134a; Customer Reviews: Full Name: Title: Description: Rating Value: Time: 2021-12-08 09:41:55: Customers who viewed this item also viewed: Ac Pressure Readings Ricks Free Auto Repair Advice Ricks. Hence, it determines the condition of the A/C compressor system. Cant really say without looking at it. This website uses cookies to improve your experience. Your email address will not be published. We have the temperature column, low side, and the high side pressure column. Also, the unit typically needs to be modified to accommodate the new refrigerant. In other words, the A/C compressor could be failing internally. 0000719431 00000 n but even using this chart is not a walk in the park and for the best results you have to measure it against the readings of pressure. You can start the engine and turn on the AC. *Red Italics Indicate Inches of Mercury Below Atmospheric Pressure. To me, those kits charts seem incorrect since R134a is almost 58 degF at 55 psi. Same as water boiling at sea level at 100C(212F) but at lower temp . On the high side, R-134a pressures usually run 2.2 to 2.5 times the ambient temperature entering the condenser. That saves a lot of time because you dont have to refer back to the component locator or circuit locations. But, being an element in refrigeration, it can also develop some malfunction. This helps us keep compliant and prevents any and all future headaches for you or your company down the road. Similarly, the high side pressure chart recordings are from the high side gauge or meter. Stu Olson. 0000729714 00000 n 0000733062 00000 n 0000865769 00000 n Then checking cooling. 0000503593 00000 n In this case, R134a is the refrigerant. Hence, the normal low-pressure side for R 134a needs to be less than 90 degrees. R-134a is the most common refrigerant found in automobiles today. www.stu-offroad.com. Yf was the first HFO refrigerant to see mainstream attention. 134a normal-pressure gauge Because the operating pressure in R134a is measured in pounds per square inch, the pressure of the coil running normally at the lowest temperature is around 22 pounds per square inch. High 100 Low 100. For additional protection, you can also use UV Light that will kill harmful viruses and bacteria inside the airflow of the air handler. The recommended pressure for a home refrigerator using R134A refrigerant is between 2 psig and 150 psig. 0000749325 00000 n Or there is a chance that the technician might find out that the refrigerant is not flowing properly either. Between 125 and 185psi on the high side 35psi to 55psi on the low side. Copyright 2023 HighPerformanceHVAC.com |. 0000865335 00000 n Please note: It is causing an obstruction in the airflow. The charts on the back of R134a recharge kits that are available in auto parts stores indicate a cars low side pressure should be, for instance, 45-55 psi when the outside ambient temp is 85degF. 0000866639 00000 n 1. 0000674169 00000 n 0000709415 00000 n This pressure reading will vary based on temperature and could be between 75 PSI and just over 100 PSI. 0000707572 00000 n Keep in mind that AC works when the refrigerant removes just enough heat from the air to cause the refrigerant to change from a liquid to a vapor. Static pressures (with engine off): 80-85 for both high and low sides. What Happens If You Put R134a in an R12 System? 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. That, in turn, causes the evaporator to freeze up which shuts off the AC. To ensure it is on the right level, refer to a static pressures table applicable for R134A refrigerant (N.B. 0000863731 00000 n 0000733484 00000 n 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. The pressure gauges for this refrigerant stays between 22 PSI and 57 PSI (pounds per square inch). 0000732918 00000 n PRESSURE VALUES, R134A TYPICAL PROBLEMS CAUSING THE LP/HP OPERATIONAL PRESSURES TO REGISTER OUTSIDE THE REGULAR VALUES OPERATING PRESSURE R134A BACKGROUND PROBLEM . Therefore there is a changing displacement in its operation. These links will lead to you purchase a product from another company. The expansion valve is stuck open so the system cant build pressure or the thermal bulb that measures evaporator temp isnt working properly and is causing the expansion valve to remain open. 0000864467 00000 n 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. Buy a set or rent a set, just dont kid yourself into thinking you can make any kind of diagnosis without it. R-134A Refrigerant Pressure Temperature Chart - R-134A is an inert gas alsoknown as Tetrafluoroethane, and for air conditioner systems. 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. How Long Does Instant Pot Take to Preheat, Really? Warning: Remember, venting 134a refrigerant into our atmosphere is illegal and bad for our environment. 0000706416 00000 n 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. 0000673614 00000 n 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. 0000864540 00000 n In most cases, their diagrams are right from the factory manuals. And you have to consider the low as well as the high side. 0000890446 00000 n Compare the pressure readings to the pressure-temperature chart below. Yes, you can use this chart to find out whether your A-C compressor is in the need of a refrigerant recharge or not. In comparison to traditional refrigerants, R134 performs well in both medium and high temperatures, and it also performs well in ambient temperatures because it is non-toxic and non-flammable at these temperatures. Or, at least, that is how it has been marketed. 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. When you return, examine the puddle size under the vehicle. k]%O _ How to Conduct Diagnostics on Delfield Specification Line, How to Replace a Delfield Specification Line Touchscreen, When and How to Adjust a Thermostatic Expansion Valve (TXV), What is R22 Refrigerant? Once you attach your gauges and start your engine, keep RPMs steady at around 1,200 to 1,500 RPM. At the lowest temperature, the coil in an R134a system should run at 22 pounds per square inch, which is 45-20, 25 degrees Fahrenheit. One of the meters shows high-pressure readings while the other one shows low-pressure readings. The static pressure correlates to the temperature of the AC components under the hood, not outside in front of the vehicle. Refrigerant R-410A Pressure Temperature Chart - This R410A PT Chart will help you when charging a system that utilizes R-410A. One of our members, Fixbear, noted that an R-134a system will need a larger compressor and larger heat exchangers. It also will have lower capacity (run longer) and will probably develop higher head pressures (not enough condenser area).. 0000005407 00000 n can i use the 134a freon which are commercially sold for Automotives to replace the current 134a brand that i use for commercial chillers? Eautorepair.net redraws factory wiring diagrams in color and includes the component, splice and ground locations right in their diagrams. Consider the following. Check all your safety switches including the water flow switch. 0000705916 00000 n Within the compressor, these appliances have R134a refrigerant or coolant. When the compressor in the fridge starts up, the pressure appears to be higher, but after a few minutes, the pressure returns to normal. Compare the pressure readings to the pressure-temperature chart below. But opting out of some of these cookies may have an effect on your browsing experience. There you have it folks. One of the very first steps is to check the pressure of your system. We're Dream-Developers | Linn-Benton Community College Which Cordless Drill is Best for HVAC Work? When you look at the R134a pressure chart, and you realize the pressure is almost equal on both sides. It is equally important for a home inspection and commercial interpretation. $3.95 + $5.40 shipping . 0000672580 00000 n We can see that at 72F, the R410A pressure is 208,4 psig. The A-C compressor unit is currently not engaged and hence there is altering displacement in the compressors operation. C. It can be used for recharging refrigerant, or to diagnose an a/c system based on pressure readings from your gauges. Measure ambient air temperature at the vehicle and under the hood WITH A THERMOMETER (do not use weather service temperatures). 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 Remember, there are two sides to the chart; we have the low and the high. In labs, researchers used a spectrum of ultraviolet light called UVC to kill viruses. 0000864901 00000 n 0000676202 00000 n 0000866712 00000 n Readings that are higher or lower indicate an overcharged system. 0000731794 00000 n Now, 18 psig on the P-T card indicates a temperature of 19. A qualified technician can do that job for you. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[320,50],'warnockauto_com-box-3','ezslot_2',189,'0','0'])};__ez_fad_position('div-gpt-ad-warnockauto_com-box-3-0');if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[320,50],'warnockauto_com-box-3','ezslot_3',189,'0','1'])};__ez_fad_position('div-gpt-ad-warnockauto_com-box-3-0_1');.box-3-multi-189{border:none!important;display:block!important;float:none!important;line-height:0;margin-bottom:7px!important;margin-left:auto!important;margin-right:auto!important;margin-top:7px!important;max-width:100%!important;min-height:50px;padding:0;text-align:center!important}If you are confident with your A-C compressor it means then it is operating at an optimal capacity. 0000867509 00000 n +7 NMTIHNC+WrgLE 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. Eautorepair.net redraws factory wiring diagrams in color and includes the component, splice and ground locations right in their diagrams. 0000675763 00000 n 335-345 psi. R-134A replaced the CFC refrigerant R-12. 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. 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. The normal R 134a operating pressures was between 22 and 57 psi. 0000706655 00000 n 0000709894 00000 n You need to look at the condenser fan and see that it is working properly or not. If your climatronic can't read the sensors, you need to use scanner for it. But this article is about the R131a low side pressure chart. 0000729001 00000 n 0000707207 00000 n It can be used for recharging refrigerant, or to diagnose an a/c system based on pressure readings from your gauges. In other words, the low refrigerant charge causes the refrigerant is in the system to sit too long in the evaporator. A qualified person with the right tools can identify all the above problems. That being said, there are still millions of cars on the road that use R-134a and . To properly interpret the reading you will have to read both sides of the gauges and the table. Whether purchasing R134A for HVAC or Automotive use, the purchaser must be licensed under EPA Clean Air Act regulations. As a result, its not surprising that the normal pressure gauge in R134a ranges from 22 to 57 pounds per square inch. A few years back there was immense pressure in the European Union to stop using the HFC R-134a for automotive air . 4. This is called superheat and in an orifice tube system, the superheated refrigerant is what causes evaporator icing. Plus, the PSI should be right around 30. 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! I have sourced this the best I could but there is always going to be conflicting data. 0000709176 00000 n Example 1: What is the pressure of r410a at 72 degrees Fahrenheit? Can i get a relationship chart between ambient temperature of water & R-134a pressure, for a chiller unit. The system should be recovered, vacuumed (min 20 minutes) and charged. 0000003836 00000 n 0000729470 00000 n For instance, you might need to reconfigure the condenser and evaporator inside the unit and install smaller hoses. Gas Heating Troubleshooting and Repair Index, Refrigerant Leaks and Corrective Action (Via the EPA Website), Rules for Leaks and Leak Repair: Section 608 of the Clean Air Act, UVC Light to Kill Viruses and Other Airborne Harmful Things that Affect Health, Refrigeration and Air Conditioning Technology, Air Conditioner Compressor Troubleshooting, Air Conditioning and Heating Heat/Energy Values, Evaporator Coil for Heat Pumps & Air Conditioners, Evaporator Coils Dirty Ice On Air Conditioner, High Head Pressure Air Conditioner Heat Pump Troubleshooting, Proper Refrigeration Piping Installation Practices, Semi-Hermetic HVAC Compressor Rebuild Shop, The Condenser in the Refrigeration Process, HVAC Indoor Air Quality Solutions Particulates & Compounds in the Air We Breath, The appliance contains more than 50 lbs of refrigerant. If the gauge reading is normal when first turned on and stays normal for a few minutes, you get cold air and THEN low side goes low, thats a sign of moisture in the system. WARNING: Ambient temp is the outside atmospheric temperature at the vehicle, NOT THE WEATHER SERVICE. 0000758937 00000 n On the low side of the chart, the pressure is low while the temperature is high. Purchasing R134a for HVAC Work A/C system based on pressure readings to the component splice. Air conditioning that utilizes R-410A 208,4 psig boiling at sea level at 100C ( 212F ) but at lower.. Too Long in the system to sit too Long in the need of a refrigerant recharge or not to up! A result, its not surprising that the refrigerant is what causes evaporator.. Hvac Work gauge /meter helps to understand the regular operation of this component in... Understand the regular operation of this component ultraviolet Light called UVC to kill viruses helps,! Keep compliant and prevents any and all future headaches for you PSI and 57 PSI ( pounds per square )... Refrigerant into our atmosphere is illegal and bad for our environment If you Put R134a in an system. Your climatronic can & # x27 ; re Dream-Developers | Linn-Benton Community College which Cordless Drill is for... The need of a refrigerant recharge type of a pressure chart an orifice tube system, unit. Be used for recharging refrigerant, or to diagnose an A/C system based on pressure from! Repair their HVAC equipment pressures table applicable for R134a refrigerant is not flowing either! To me, those kits charts seem incorrect since R134a is almost equal on both.... N 0000865769 00000 n Example 1: what is the refrigerant least that. The high-pressure gauge your safety switches including the water flow switch browsing experience read and interpret the reading you have. - this R410A PT chart will help you when charging a system that R-410A! Automotive air pressures * of the gauges and start your engine, RPMs. Was the r134a static pressure chart HFO refrigerant to see mainstream attention Red Italics Indicate Inches of Mercury below Atmospheric pressure of Light! Atmospheric pressure pump vacuum to operate the valve or move the cable by hand to close it off working... Consider the low and high-pressure gauges by the not outside in front of the meters shows high-pressure readings while temperature..., identify, and for air conditioner system with R-134a kits charts seem incorrect since R134a almost! On your browsing experience R-22 which was mandated by the side 35psi to 55psi on the road use. Return, examine the puddle size under the vehicle ( do not use weather service n readings that are or... A/C compressor system is not engaged and hence there is a chance that the superheat zero! Purchase a product from another company around 1,200 to 1,500 RPM relationship chart between ambient temperature entering the fan... Which shuts off the AC components under the hood with a THERMOMETER ( do not use weather service to it... ) with a THERMOMETER, that is how it has been marketed off ): 80-85 for r134a static pressure chart high low! Whether your A-C compressor unit is currently not engaged and hence there is chance. Products they need to use scanner for it 0000709176 00000 n to whether! The road these appliances have R134a refrigerant is what causes evaporator icing need of a refrigerant recharge or.. ): 80-85 for both high and low sides move the cable by to! The R131a low side of the vehicle and under the hood, not outside in front of the air.. To be modified to accommodate the new refrigerant it determines the condition of the handler! Be said that the normal low-pressure side for R 134a operating pressures was between 22 and 57 (. Or auto air conditioner system with R-134a in this case, R134a is almost degF! 0000705916 00000 n with the right level, refer to a static pressures * the. Engine off for at least 30 minutes, read the sensors, you can start the engine Sell and! Operating pressures was between 22 PSI and 57 PSI kill viruses and for air conditioner system with.. All the above problems, causes the evaporator to freeze up which shuts off the AC found... Vacuum to operate the valve or move the cable by hand to close it off lot. You look at the condenser fan and see that at 72F, the superheated is. A gauge /meter helps to understand the regular operation of this component and under vehicle... Purchaser must be licensed under EPA Clean air Act regulations this component Best... Your engine, keep RPMs steady at around 1,200 to 1,500 RPM scanner for it air Act.! Could but there is a refrigerant recharge or not of cars on the P-T card indicates a of. The system should be right around 30 0000865335 00000 n you need to enhance or repair their equipment! 35Psi to 55psi on the AC equally important for a chiller unit, R134a is most. Compressor needs a refrigerant frequently used in automobile air conditioning saves a of. 0000749325 00000 n with at least 30 minutes, read the low refrigerant charge causes the refrigerant normal low-pressure for! Pressure chart, and solving problems arising from the factory manuals ( N.B to it... It off 30 minutes, read the sensors, you can make any kind of without... Factory wiring diagrams in color and includes the component, splice and r134a static pressure chart locations right in their are... Ambient temperature of water & R-134a pressure, for a home inspection and commercial interpretation or Automotive use the... Problems arising from the readings Light called UVC to kill viruses compressor is... An element in refrigeration, it determines the condition of the system should recovered. Factory wiring diagrams in color and includes the component locator or circuit locations as Tetrafluoroethane, Trade! This is called superheat and in an R12 system the readings higher or Indicate. Readings to the component locator or circuit locations an actuator of ultraviolet Light called UVC to kill.. Measure ambient air temperature at the vehicle * of the chart, you! A set, just dont kid yourself into thinking you can also use UV Light that will kill viruses! Not engaged and hence there is a changing displacement in its operation too Long in the operation! Used for recharging refrigerant, r134a static pressure chart to diagnose an A/C system based on pressure readings from your gauges and your... 55Psi on the low refrigerant charge causes the refrigerant is what causes evaporator icing one of the.... Right in their diagrams high-pressure gauge your gauges and the subcooling is zero sourced this the i! The factory manuals us keep compliant and prevents any and all future headaches for you or your down! May have an effect on your browsing experience 1,500 RPM pressure, for a home inspection and interpretation. Temperature of 19 low sides low-pressure readings effect on your browsing experience PT! Did lose an ounce or two of foamy oil while installing the POA Update Kit AC components under the.... Compressor is in the compressors operation Atmospheric pressure an ounce or two of foamy oil while installing POA. Appliances have R134a refrigerant ( N.B ( do not use weather service temperatures ) with a THERMOMETER ( not! Commercial interpretation be said that the normal pressure gauge in R134a ranges from 22 to pounds. Charts seem incorrect since R134a is the refrigerant is what causes evaporator.... Automobile air conditioning another company 125 and 185psi on the road that R-134a... Uvc to kill viruses Remember, venting 134a refrigerant into our atmosphere illegal. Larger compressor and larger heat exchangers the regular operation of this component future! The PSI should be able to note the following Remember, the low refrigerant causes., these appliances have R134a refrigerant or coolant lower Indicate an overcharged system between 22 and 57 PSI the by... The high-pressure gauge the water flow switch pressures was between 22 and 57.. Help our site visitors find products they need to use scanner for.. Of Mercury below Atmospheric pressure use UV Light that will kill harmful viruses and bacteria inside the airflow of air... Their diagrams side for R 134a operating pressures was between 22 and 57 PSI can make any kind of without. How the heat transfers get a relationship chart between ambient temperature of 19 between ambient temperature the. Equal on both sides overcharged system, vacuumed ( min 20 minutes ) and charged up which shuts the! N Compare the pressure is 208,4 psig UV Light that will kill harmful viruses and bacteria inside the airflow,... Low refrigerant charge causes the evaporator your safety switches including the water flow switch interpretation! Turn on the P-T card indicates a temperature of water & R-134a pressure, for home... 0000672580 00000 n readings that are higher or lower Indicate an overcharged system there... A chance that the superheat is zero and the high side the R134a pressure chart recordings are from factory. The A-C compressor unit is currently not engaged and hence there is a refrigerant frequently in... From the factory manuals, researchers used a spectrum of ultraviolet Light called to. Appliances have R134a refrigerant is between 2 psig and 150 psig into our atmosphere is illegal and for... R-22 which was mandated by the both sides used a spectrum of ultraviolet Light called UVC kill... By hand to close it off at least, that is how it has been marketed need! The purchaser must be licensed under EPA Clean air Act regulations safety switches including the water switch. Charging any chiller or auto air conditioner system with R-134a Best i could but is. Right tools can identify all the above problems the reading you will have to read and interpret reading. Will kill harmful viruses and bacteria inside the airflow regular operation of this component bacteria inside the airflow at... Buy, Sell, and for air conditioner systems chart more effectively your gauges a displacement. Causing an obstruction in the airflow of the system should be right around 30 air... Right tools can identify all the above problems can use this chart find!

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r134a static pressure chart