High 100 Low 100. At atmospheric pressure, the R134a has a boiling point of -26. Automotive Air Conditioning Diagnosis Chart Low Side High Side Duct Temp . The most common symptom of a bad AC pressure switch is a non-functioning air condition system in your car. Mabru RV 12000 -12 Volt DC Air Conditioner (12,000 BTU) 2,599. It can be used for recharging refrigerant, or to diagnose an ac system based on pressure readings from your gauges. What is the normal pressure for the AC on the low pressure side. Evacuate and recharge the system to the proper levels and retest (see above). Three indications that your HVAC system make have high static pressure are Uneven Heating and Cooling. Before measuureing the Ac pressure using the gauge, you must know that what are the normal reading for the gauge. With the engine OFF for at least 30 minutes, read the low and high-pressure. Kingtec Middle East. 66 gcm 3, in gas form - this is a colorless gas. 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. Depending on the ambient temperature (air. It compresses and discharges it at a higher temperature and. periods of inactivity can cause the rubber seals in the air conditioning. In simplest terms, if you have a 5 ft x 5 ft x 5. Air Conditioning & Refrigeration Controls. Guide To Ac Compressor Pressure Readings. The temperature scale on the inside of the gauge dial is the same thing as the saturated pressure chart. Though every air conditioning system will vary, you want to see the high side pressure around 20 psi and the low side around 40 psi. Hook up your gauges and record the static pressure. With the engine OFF for at least 30 minutes, read the low and high-pressure gauges. Static pressure is the pressure with the system at rest (compressor off for at least 30-mins). Static pressure is a crucial aspect of heating and air conditioning maintenance. Automotive Hvac Pressure Diagnostics You. At least twenty-five PSI of static pressure is required, or the cycle switch may disable the compressor. Start engine and set AC on MAX COOL. Apr 25, 2009 The pressure in the AC system will rise - a lot - whenever the compressor is not running. In simplest terms, if you have a 5 ft x 5 ft x 5. Tecumseh Superheat, Subcooling & Temperature Pressure MAGNETIC Chart 11. I have an 06 STi, wondering if anyone knows the static pressures (Car off and cold) of high and low side with an ambient temp of 90-100. If the static pressure reading is close to the chart, then conduct a running pressure test. Pt Chart 101 You Refrigeration And Air Conditioning. The main symptoms of a bad or failing AC Pressure Switch include Intermittent Air Conditioning. Search Ac Pressures Chart. March 20, 2019 by Alec Johnson. Yf was the first HFO refrigerant to see mainstream attention. For a general reference, you can check out this chart of R-134a system pressures. . This chart details how ambient temperature correlates with the system refrigerant charge pressure, and how it affects high and low side psi. Yf was the first HFO refrigerant to see mainstream attention. system is susceptible to leaks. Turn OFF the ignition. Step 2 Restart the engine and turn on the air conditioning. ly2UZkdGxDownload the free guide here httpsbit. With the AC turned OFF - On a cold day the pressure will be low, on a hot day the pressure will be high. Kingtec Middle East. AC Pro. The air cooled engine 911 is setting there idling with the AC in operation and each time the AC clutch is released the high side pressure is quite possibly at 350 degrees. Turn OFF the ignition. Bear in mind, that an average AC system loses up to 50 grams2 oz. Always use polyester oil when working with R134a. An overcharged AC will read higher pressures than normal and also higher temperatures. How, when and why is the static pressure tested The static pressure is tested with the engine and air conditioning off known as at rest to conduct an initial evaluation. . Car ac gas pressure chart Joined Dec 17, 2001 &183; 60 Posts Low side pressure is too high (high side pressure is normal) Finally, if you're wondering why your AC pressure reads too high on the low pressure side, while the high side pressure remains normal, you might be dealing with incorrect cycling of the condenser 0 kgcm2, 18 28 psi) High. Before the vehicle is started, the static system pressure should be read. Since many Corvette owners put their. 500 CFM 0. Any AC system requires a refrigerant, such as R-134a. Generally the liquid will migrate to the coldest part of the system but that can take hours. R22 boiling point -40. Insert a nail through the box, attach the magnets to it and wrap the box with 200 feet of 30-gauge copper wire. At around 95 degrees I charge to around 25-50 max lowside (orifice or expansion valve will change that up a bit) and around 275-325 max highside, those pressures are locked to that high ambient air temp. Step 3 Observe the pressure readings. You can try pouring water over the condenser to see if the pressures drop and the air gets cold. Suction pressure was 50 plus psi running. Insert a nail through the box, attach the magnets to it and wrap the box with 200 feet of 30-gauge copper wire. To determine this,. Finding and repairing leaks are covered in the next Detailed Topic. You can start the engine and turn on the AC. terms Static pressure lowhigh side. The correct reading will display once the clutch engages and the gauge stops cycling. If your climatronic can&x27;t read the sensors, you need to use scanner for it. AC Pressure Troubleshooting Chart. 4 2-16. just about all AC systems that run 134a should be the same if you can find a Temperature Pressure Chart (TP Chart) take your ambient temp for 134a add 30 degrees and look at your PSIG that should be your high side pressure louver controls set at max cold air settings (Max AC) Blower set at high speed >add gas in 12 minute to 1 minute bursts. I just did my first automotive AC repair, after the compressor in my 2004 Lancer 2. It was also used on the 1998 Dodge Dakota, Isuzu Rodeo and Kia Sportage. Install the gauges. Record ambient air temperature and humidity. May 04, 2017 Static Pressure Static pressure is the resistance to airflow from objects in the air stream Filters, coils, heat exchangers, registers, grills, balancing dampers and, of course, the duct itself, are just a few After the resistance of these objects is subtracted, the balance is what is available for the duct system. Errors can occur. Static Pressure is the resistance to airflow (friction) caused by the air. Your vehicles compressor, powered by the serpentine belt, compresses the refrigerant into a liquid, putting it into a high-pressure state. A low pressure on the low side could also indicate a clog somewhere in your system. Basic Air Conditioning Pressure Temperature Chart 101 You. Vehicles with a model year 1994 and earlier most likely use R-12 refrigerant. Install the gauges. The PressureTemperature hart indicates the pressure and temperature relationship for three automotive refrigerants. At 200-psi. Three (3) sources of information follow 1. Once you get the vent temp to 38-42 deg. 5 X ambient F Pressure behavior when AC is shut off High Side Pressure PSI Low Side Pressure PSI Center Vent Air Temperature F Inlet Air Temperature F 1. I just did my first automotive AC repair, after the compressor in my 2004 Lancer 2. Opens in a new window Opens an external website Opens an external website in a new window. Before the vehicle is started, the static system pressure should be read. Our chart below will help you potentially identify the issue you are experiencing. If the pressure is outside of the range (over or under), service may be required. to2bwIij6In this video we go over how misleading these readings . 2019 &183; I have corsair ll120's the white ones they are 2200rpm fans and they move air though my 360mm rad really well. The PressureTemperature Chart indicates the pressure and temperature relationship for three automotive refrigerants. The chart shows the desired range for the low-pressure side of the AC system at each 5 increment. Now move out of the car4 and turn the valve on the low-pressure side. Record ambient air temperature and humidity. . 1 102. Jan 26, 2016 Step 1 Turn the engine off and install the gauge set. To ensure it is on the right level, refer to a static pressures table applicable for R134A refrigerant (N. 6 o C. When AC compressor turns ON and OFF, and the low side pressure becomes too high, your s. Car Ac Check With Gauges And Pressure Chart Freeautomechanic. Kingtec Middle East. Our chart below will help you potentially identify the issue you are experiencing. I use the same running numbers as on any other vehicle out there, the gas does not know what car it is in. Thus, this chart is provided for informational purposes only. Static pressure in an HVAC unit refers to the pressure of the air in the duct work etc. Psig (inches of mercury) is equal to psia - 14. 160 PSI high 10 PSU low This indicates a problem with the piping, evaporator, or expansion valve. Car ac gas pressure chart Joined Dec 17, 2001 &183; 60 Posts Low side . The Duct Size Calculator is intended for use as a quick reference tool for approximating duct sizes and equivalent sizes of sheet metal duct versus flexible duct Minimum heating airflow 400 cfm From the performance data charts, select a valve size 10 for cooling, which has a wide-open static pressure drop of 0 The Duct Sizer application allows. When the compressor runs the pressure drops - a lot. Don't go over, as too much refrigerant will be detrimental to performance as well as too little. 7 kPa) high-side pressure and 24-31 psi (165. Good ductwork can make a massive difference in the effectiveness of your HVAC system. In this case, the air flow of a fan is measured in cubic meters per minute (mmin) in metric units, or cubic feet per minute (CFM) in imperial units. Anyway, here is the best DIY help for AC I know. R22 alternative names CHClF 2 Chlorodifluoromethane, Difluoromonochloromethane, generic term hydrochlorofluorocarbon (HCFC) R22 boiling point -40. Locate the vehicles AC compressor for reference, and its important to monitor what the AC clutch is doing. Mabru RV 12000 -12 Volt DC Air Conditioner (12,000 BTU) 2,599. , we can then assume the system has some amount of liquid refrigerant. With an ambient temperature of 70&176; F (21&176; C), an orifice tube system with a cycling switch should have approximately 150-250 psi (1034. Let&x27;s take a look at the r134a pressure chart also know as ac pressure chart. Static Pressure " are listed as specifications. R134A Pressure-Temperature Chart-49-45 1-17. Com 5542 Hickorywood. Air Flow " and " Max. 7 at sea level. Summary Table of Gauge Diagnostics. Supplies, Parts & Hardware. R134a Pressure Gauge Chart. The term gauge signifies that the pressure has been read from a gauge that actually measures the difference between the pressure of the fluid or gas and the pressure of the atmosphere. However, instead of moving blood through a human body, the AC compressor moves refrigerant. What is static pressure in the system Before the vehicle is started, the static system pressure can be read. The PressureTemperature hart indicates the pressure and temperature relationship for three automotive refrigerants. Static pressure is a crucial aspect of heating and air conditioning maintenance. 1 53; 11. I drove the car for a little while to get it nice and warm. Pressure values should. With the vehicle on and front and rear AC cranked on. Finding and repairing leaks are covered in the next Detailed Topic. Download the free Pressure Chart poster here httpsbit. If the AC system was operating, allow the AC system to equalize for about 2 minutes. This principle is used especially if the air to be measured has a very high flow rate and temperature. 2 to 2. If the pressure is outside of the range (over or under), service may be required. This chart details how ambient temperature correlates with the system refrigerant charge pressure, and how it affects high and low side psi. Why 27-psi on the low side Because, on an R-134a AC system, 27-psi. As the ambient temperature rises the red gauge also increases 40psi up to 225psi. the temperatures that the refrigerant turns into liquid and vaporize only depend on the pressure and it has a chart. 7 kPa) high-side pressure and 24-31 psi (165. I used a manifold gauge set to charge the system. What is normal automotive air conditioner pressure Start the engine and turn on the air conditioner. . With the engine OFF for at least 30 minutes, read the low and high-pressure gauges. Now, turn on your car, set the AC to full, and let the compressor run for a few minutes. Timothy Salomon. . Now, turn on your car, set the AC to full, and let the compressor run for a few minutes. Summary Table of Gauge Diagnostics. Actual pressure will depend on the type refrigerant and the ambient temperature and does not show if the system is properly charged. Warning Remember, venting 134a refrigerant into our atmosphere is illegal and bad for our environment. With the AC turned OFF - On a cold day the pressure will be low, on a hot day the pressure will be high. Pressure that is too much lower or higher shows there is a problem. TRUCK ANTILOCK BRAKE SYSTEMS. Not sure on vw but most of the cars ive done ac work on equalize around. Car Ac Check With Gauges And Pressure Chart Freeautomechanic. Air flow is the volume of air that is produced by the fan measured by time. 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. Step 2 Restart the engine and turn on the air conditioning. 5 X ambient F Pressure behavior when AC is shut off High Side Pressure PSI Low Side Pressure PSI Center Vent Air Temperature F Inlet Air Temperature F 1. Anyway, here is the best DIY help for AC I know. Our chart below will help you potentially identify the issue you are experiencing. If you are not the original owner of the vehicle, however, be sure to check. It feels like there is more in the can but it wont enter the system. But there are two different columns of pressure readings. 2 to 2. The same is true of a static pressure reading. What static pressures actually means. When the engine is on and the AC is on high, low pressure readings should be around 30 psi and the high pressure side should be about 250 psi depending on your car. Jan 26, 2016 Step 1 Turn the engine off and install the gauge set. Static pressure chart for car AC 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. . You should notice that as the low-side pressure reaches approx. You can start the engine and turn on the AC. Compressor does not engage. what is normal ac pressure. Unless the car has been parked in a temperature controlled garage for a long time, all the components will be at different temperatures. You can start the engine and turn on the AC. The gauges readings will depend on the ambient temperature. 1 102. Static system pressure 45 psi minimum Center vent temp 30F < ambient Low side pressure Typical 30 psi High side pres-sure Typical 2. Take a reading of your refrigerant system pressure (PSIG). the temperatures that the refrigerant turns into liquid and vaporize only depend on the pressure and it has a chart. Static pressure is only partial indication and yes 50 psi3. Check on the temperature. Automotive Ac Pressure Chart Beautiful Best Automotive Ac Pressure Air in system 2 Max Voltage 480 V AC 20P or higher Lack of Pressure Lack of Pressure. When the engine is on. A low pressure on the low side could also indicate a clog somewhere in your system. Open the windows in order to ventilate the interior of the vehicle. 66 gcm 3, in gas form - this is a colorless gas. Apr 25, 2009 The pressure in the AC system will rise - a lot - whenever the compressor is not running. The general rule is the static or at rest pressure of a R134a system should be approximately the same as the ambient air temperature. Only things can happen that will result in the high side pressure declining below that peak. R22 molar mass 86. I added some refrigerant to my car, and it still won&39;t get cold. Look up the ambient temp and it will show you the pressure you&x27;ll see in the system. 1 102; 38. system is susceptible to leaks. But, first, purge out the excess air in the line. 25 35 PSI. Good ductwork can make a massive difference in the effectiveness of your HVAC system. The EBC325 system is a lightweight, compact, four wheel three channel system that includes special dampening to reduce noise during ABS braking. temperature surrounding the vehicle. If the air conditioning isn&x27;t blowing cold air and the low side pressure is too high, it could be caused by issues with the condenser fan. 4 bars is low pressure. The most common symptom of a bad AC pressure switch is a non-functioning air condition system in your car. Unnecessary Blockages. The magnetic clutch switch turns off before the outlet air temperature is sufficiently low. To ensure it is on the right level, refer to a static pressures table applicable for R134A refrigerant (N. 7 at sea level. I used a manifold gauge set to charge the system. In simplest terms, if you have a 5 ft x 5 ft x 5. Temperature Readings (0F0C) Low Pressure Gauge Readings 65 0 F18 0 C Between 25 to 35 psi 172-241kPa 70 0 F21 0 C Between 35 to 40 psi 241-276kPa. Just not sure how accurate the gauges. If the static pressure reading is close to the chart, then conduct a running pressure test. 6 101 38. But there are two different columns of pressure readings. As a matter of fact there is a quick way to determine if the static pressure reading the HVAC technician takes is good or not. Errors can occur. The pressure gauges for this refrigerant stays between 22 PSI and 57 PSI (pounds per square inch). Pressure sensors are installed on HVAC unit return and supply. Pressure values should be very nearly equal on both LP and HP gauges. Static pressures (with engine off) 80-85 for both high and low sides. The temperature scale on the inside of the gauge dial is the same thing as the saturated pressure chart. When the engine is on and the AC is on high, low pressure readings should be around 30 psi and the high pressure side should be about 250 psi depending on your car. I use the same running numbers as on any other vehicle out there, the gas does not know what car it is in. Static pressure chart for car AC 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. Normal readings on high and low side with AC OFF (static pressure) Depends on outside temperature, but normally is between 80-105 PSI Normal low side reading with AC on high-speed and MAX engine at 800-1000. To ensure it is on the right level, refer to a static pressures table applicable for R134A refrigerant (N. 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. As a matter of fact there is a quick way to determine if the static pressure reading the HVAC technician takes is good or not. A quality R134A Gauge Set is a must for an accurate Diagnosis-httpamzn. If you find youve got a low pressure on the low side of your system, then its most likely that youve got a leak as that is a common problem in automobile air conditioning systems. ly2UZkdGxDownload the free guide here . Having these facts along with the saturation point, the subcool, and the superheat numbers for the refrigerant you are working on are essential when it comes to really understanding what is going wrong with your system. However, there&x27;s also the possibility that the system has gotten overcharged with too much refrigerant. A quality R134A Gauge Set is a must for an accurate Diagnosis-httpamzn. Mabru RV 12000 -12 Volt DC Air Conditioner (12,000 BTU) 2,599. free pets near me craigslist, ozark funeral homes inc anderson obituaries
Why 27-psi on the low side Because, on an R-134a AC system, 27-psi. . Car ac static pressure chart
If not, it will cause your car ac pressure to not equalizing. temperature surrounding the vehicle. . AC Pressure Chart R-134a Temperature Pressure Chart How To Diagrams System Pressure Chart Get a quick look at what an average AC system looks like, along with the compressor manufacturer and what the specific R-134a requirements are for your car. Start engine and set AC on MAX COOL. Your vehicles compressor, powered by the serpentine belt, compresses the refrigerant into a liquid, putting it into a high-pressure state. Our chart below will help you potentially identify the issue you are experiencing. I added some refrigerant to my car, and it still won&39;t get cold. Warm Air is Blowing. Your cars manual will explain what the correct pressure reading should be. Step 2 Restart the engine and turn on the air conditioning. . In simplest terms, if you have a 5 ft x 5 ft x 5. Open the windows in order to ventilate the interior of the vehicle. Hence, the normal low-pressure side for R 134a needs to be less than 90 degrees. Medium-pressure systems, with a static pressure from 2 to 6 in. It may be worth checking the pressure once or twice after recharging in case the low refrigerant level was caused by a leak in the system. This chart shows the pressuretemp relationship for R-12 and R-134a. Measuring the temperature of the lines will tell you a lot more as to what is going on. NOTE Pressure reading can only be taken when the compressor is cycled on. It can be used for recharging refrigerant, or to diagnose an ac system based on pressure readings from your gauges. R-410A is currently being phased in for residential use as the phase period for R-22 draws nearer. Temperature (F) R-22 R-410A R-12 R-134a R-404A R-507A R-407A R-407C R-427A R-422B R-422D R-407F. Download the free Pressure Chart poster here httpsbit. Warm Air is Blowing. It works like a normal AC gauge. . ly2UZkdGxDownload the free guide here . If it fails the test, then its time to get out the auto ac gauges and be ready to check the auto ac pressures chart below. Disclaimer Some pressures were derived from unpublished sources. compress and chill the air entering your Corvette and the high-pressure. So, making sure that your AC pressure switch is working is essential for the long life of the air. There can be a number of problems that crop up with air conditioning not working at all to working at a diminished capacity. You can use a refrigerant pressure chart to find static pressures at various temperatures. R 134a system pressure chart ac pro solved a chart used to properly charge automotive air con troubleshoot automotive air conditioning problems how to vacuum and charge an air conditioner in under 45 minutes guide to ac compressor pressure readings how to vacuum and charge an air. As the ambient temperature rises the red gauge also increases 40psi up to 225psi. Basic Air Conditioning Pressure Temperature Chart 101 You. . The chart shows the desired range for the low-pressure side of the AC system at each 5 increment. It works like a normal AC gauge. May 29, 2016 at 705 am 859315. For an analogy, think of water flowing through a garden hose. Automotive Hvac Pressure Diagnostics You. 7 kPa) low-side pressure. The magnetic clutch switch turns off before the outlet air temperature is sufficiently low. The chart shows the desired range for the low-pressure side of the AC system at each 5 increment. At this point, start the vehicle and set the air conditioning to MAX setting. Example The ID Arctic Freeze chart at 80 degrees temp shows max Hi Pressure of 210 PSI, but the Chrysler Service Manual shows max Hi Pressure of 330 PSI. temperature surrounding the vehicle. Find the corresponding saturated pressure for your refrigerant. The table below shows the comparison between temperature and pressure for R134a. The normal HVAC baseline is about 39 PSI on the Low-Side, and about 250 PSI on the High-Side. Not sure on vw but most of the cars ive done ac work on equalize around. Record the low and high side STATIC pressure readings. High Side. If the end of the hose is open, the water flows out in a gentle streamits under low pressure. If not, it will cause your car ac pressure to not equalizing. The pipes get clogged with debris and increase the car AC pressure. Measure the ambient temperature. Hook up your gauges and record the static pressure. Though every air conditioning system will vary, you want to see the high side pressure around 20 psi and the low side around 40 psi. I used a manifold gauge set to charge the system. 225 PSI high 80 PSI low This kind of pressure reading usually comes when too much refrigerant is inside the system. The typical complaint for an AC problem is the AC blows warm air Automotive AC Pressure Chart for Air Conditioning Systems with R134a FOR AUTO AIR CONDITIONING R134a SYSTEMS At IDLE - Condenser inlet temp 170 to 180, Condenser Outlet. But, if you&x27;re noticing all three, then this could be what&x27;s causing them. Jan 14, 2022 R134a refrigerant has zero ozone-depleting potential (ODP)) and is ubiquitous with the best refrigerant R12. Attach to the hoses and gauge set to the high and low side ports of your AC system. . Barg is the gauge read pressure. system is susceptible to leaks. Psig is equal to psis at sea level (14. When the engine is on and the AC is on high, low pressure readings should be around 30 psi and the high pressure side should be about 250 psi depending on your car. With the clutch engaged, a compressor pulls low-pressure vapor in from the suction side. 4 bars is low pressure. 8 o C and at 10psi pressure, its boiling point rises to -10. With the vehicle on and front and rear AC cranked on. Open the windows in order to ventilate the interior of the vehicle. An extremely common cause of automotive air conditioner cooling problems happen due to no refrigerant in the system. temperature surrounding the vehicle. R-414B A retrofit blend for R-12 refrigeration and air conditioning systems as well as automotive air conditioning systems. Air Conditioning & Refrigeration Controls. If the air conditioning isn&x27;t blowing cold air and the low side pressure is too high, it could be caused by issues with the condenser fan. Commercial Controls. 8 degree Celsius at atmospheric pressure (sea level or 1 ATM) R22 density 3. On the high side you never should see 400 PSI. in wide use in car air conditioning systems. AC Pro. In simplest terms, if you have a 5 ft x 5 ft x 5. Refrigeration Components. But there are two different columns of pressure readings. In this case, the air flow of a fan is measured in cubic meters per minute (m&179;min) in metric units, or cubic feet per minute (CFM) in imperial units. Automotive AC Pressure Chart for Air Conditioning Systems with R134a FOR AUTO AIR CONDITIONING R134a SYSTEMS At IDLE - Condenser inlet temp 170 to 180, Condenser Outlet temp 135 to 150 (usually a 30. Normal readings on high and low side with AC OFF (static pressure) - Depends on outside temperature, but normally is between 80-105 PSI Normal low side reading with AC on high-speed and MAX & engine at 800-1000 RPM&x27;s - Ranges from 25-35 PSI - Note that on many Chrysler products a. High Side. In this manner, the AC and HVAC manifold gauge sets are used to test automotive air conditioning. Air flow is the volume of air that is produced by the fan measured by time. . compress and chill the air entering your Corvette and the high-pressure. Your vehicles compressor, powered by the serpentine belt, compresses the refrigerant into a liquid, putting it into a high-pressure state. Look up the ambient temp and it will show you the pressure you&x27;ll see in the system. hello, i have audi a4 in my garage vin WAUZZZ8K8DA234004,my customer changed POWER STEERING ECU with used one,now i have dtc actived C10AC07-C10AD29-C10ACF0,can i solve with vcdsthanks. The pressures can vary a lot, depending on humidity and temperature, as well as the individual vehicle. Having these facts along with the saturation point, the subcool, and the superheat numbers for the refrigerant you are working on are essential when it comes to really understanding what is going wrong with your system. Take a reading of your refrigerant system pressure (PSIG). Always check legality of a certain refrigerant before its use. 47 gmol. Gas Heat Controls. 47 gmol. Go to the friction loss chart in any HVAC standard (CARRIER,. R-134A Refrigerant Pressure Temperature Chart R-134A is an inert gas used in air conditioner systems. Once you get the vent temp to 38-42 deg. Home FAQs DiagramsSpecs R-134a System Pressure. The real diagnostics are done with the system running, so you can see what the high and low sides are doing. · AC Low Side Quick Coupler Conversion Fit R1234YFR12 -R134A Car Air-Condition. This pressure forces the liquid out of the compressor through the hoses in your AC hose assembly, which carry refrigerant through the system. . Static pressure reading Static pressure chart for car AC 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. Pressure Low >40psi. Find the sight glass and observe the refrigerant flow while the system is running. Actual pressure will depend on the type refrigerant and the ambient temperature and does not show if the system is properly charged. Measure the ambient temperature. Compare this static pressure with the ambient temperature to gauge the amount of . 135 155 PSI. 66 gcm 3, in gas form - this is a colorless gas. 5 photos of r12 to r134a conversion chart r134 inside 134a pressure ac pressure chart. HOTLINE (800) 296-1996. . cs607 short notes