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Normal r410a operating pressures of Technology
The manufacturer's instructions rule in this case, as there are a few variables. However, our code (B52) sets the minimum design pressure for R410A to 236 psig for the low side, and 444 psig for the high side. (design can be higher, but not lower.) Your test at 450 psi is probably just fine, but 500 shouldn't hurt it.FreonTM 410A has higher operating pressures compared to R-22. FreonTM 410A is for new equipment that is specifically designed for R-410A. FreonTM 410A will require use of …Concerning theoretical cycle performance, the system cooling capacity of R32 is 12.6% higher than R410a. Also, the power consumption, energy efficiency ratio, and comprehensive energy-saving capacity of R32 are higher than R410a. Comparing R410a vs R32 electricity consumption is a hack to discovering more differences between these …low pressure drop and low flow rates. All coaxes are pressure rated to 450 psi water side and 600 psi on the refrigerant side. Optional ThermaShield coated water-to-refrigerant coaxial heat exchanger is available to prevent condensation in low temperature loop operation. Service Connections and Serviceability Two Schrader service ports are provided What are normal operating pressures for 410A? For R-410A, a working pressure capability of at least 400 psi is recommended (this includes recovery cylinders). Standard DOT recovery cylinders rated for 350 psi should not be used.R-600a Isobutane Refrigerant PT Chart. One of the very first steps when it comes to diagnosing your home air conditioner, refrigerator, or even your vehicle’s air conditioner is understanding the temperature and the current pressure that your system is operating at. Having these facts along with the saturation point, the subcool, and the ...R-410A Pressure-temperature chart Click anywhere on this document to return to Refrigerant Gas Properties information at InspectApedia.com This chart was provided by the Bonneville Power Authority, What is the normal operating pressure of R-410A? Mini-splits air conditioners depend on the refrigerant for their proper functioning. The refrigerant passes through copper tubing between the indoor unit and the outdoor unit. As it passes through a mini-split system, it moves heat from one side of the air conditioning system to the other. Mini ... For the transport refrigeration unit, tested under typical operating conditions, the COP relayed within a ±3% margin of the unit's COP working with R-410A. However, for extreme conditions, the results for the alternative refrigerant were significantly lower than those of the baseline refrigerant.Share this Tech Tip: Evaporator temperatures below 32° are common and acceptable in refrigeration; that's why there is a defrost sequence. In a heat pump running in heat mode, it's the same; freezing is a part of the process, and defrost is necessary. In comfort cooling, we can't allow the evaporator to get below 32°, or it will freeze.What are normal operating pressures for 410A on a 70 degree day? If a new R-410A refrigerant bottle had a surrounding air temperature of 70°F, the pressure inside the bottle would be 201 PSIG. Likewise, an R-410A recovery bottle with a surrounding air temperature of 70°F should have an internal pressure of 201 PSIG.R410a unit heat pump. Get to call and unit wont turn on. Customer stats unit runs for five minutes with hot air coming out the starts blowing cold. Check all switches and limits. Find the lower pressure switch open. Jump it go see if unit runs and see what the charge looks like. Unit is running 300/80 in heat mode.Forane 410A Pressure Temperature Chart Forane 410A, R-410A, Pressure Temperature Chart, PT Chart, HVAC, refrigeration, air conditioning, refrigerant gasIt isn't 2oz/yr leak. It's 5 x 2oz that's lost from service hose. This is significant for a smaller system that only holds about 3 lbs. Use a stubby gauge on high side if you need to hook into it. Just because it's "de minimis" in EPA's view doesn't mean repeated such losses don't affect system operation.The manual states that the design pressure should be 255/465 psi. The running pressure is about 200 on the fluid line and 150 on the exhaust line. This is what my installer feels like a good pressure. However, the company that sold me the system said that the pressure should be ~100psi on either line.Most of you know R-32 as a necessary component in the widely popular HFC blend known as R-410A Puron. R-32 along with R-125 gets you that R-410A that is found in nearly every air conditioner today. However, in recent years there has been a push to slowly phase down R-410A. That is because of 410A’s very high Global Warming Potential, or GWP.by ziauddin khan khan , Electrical and supervisor , Majal Service Company. …See more. hi, anyone familar with R410A. For air conditioning system, R22 pressure in discharge is250psi and suction in67psi. But for R410A pressure will be more higher that R22. So what pressure is normal for air-conditioning systems. Besides that normal R22 ...What is the pressure for 410A refrigerant? According to Refrigeration Service Engineers Society, R-410A operates at a suction pressure of 118 psi and a discharge pressure of 400 psi. This refrigerant operates at pressures 50 to 70% higher than those of R-22 (typically operates with a suction pressure of about 68 psi and a discharge pressure of ...Normal operating pressures r410a Looking for normal operating pressure/temps for r-410. 14.5 seer, 2.5t new unit. 83deg outside, system was running @ 255# high side, 135#low side, liquid line temp was 84deg.What are normal operating pressures for 410A on a 70 degree day? If a new R-410A refrigerant bottle had a surrounding air temperature of 70°F, the pressure inside the bottle would be 201 PSIG. Likewise, an R-410A recovery bottle with a surrounding air temperature of 70°F should have an internal pressure of 201 PSIG.by ziauddin khan khan , Electrical and supervisor , Majal Service Company. …See more. hi, anyone familar with R410A. For air conditioning system, R22 pressure in discharge is250psi and suction in67psi. But for R410A pressure will be more higher that R22. So what pressure is normal for air-conditioning systems. Besides that normal R22 ...What should my normal operating pressures on 410a systems be? R410a suction pressure may be around 120psi, and R410a head pressure may be anywhere from 225psi to 350psi. Many conditions could apply here, there’s absolutely ‘no’ set point pressure for 410a, r22, or anything else. Educate yourself on whats going on in the heat transfer process. Gallery of r410a pressure temp chart fresh 410a pressure temperature - r410a operating pressure chart | what is the superheat of an r 410a system that is operating, 71 logical r22 temperature conversion chart, 410a r410a pressure chart childrens blood pressure chart, refrigerant charging how to check a r 410a refrigerant charge disconnect on unit with king …*Red Italics Indicate Inches of Mercury Below Atmospheric Pressure Saturation Pressure-Temperature Data for R407A (psig)* Temp (°F) Pressure Temp (°C) Temp (°F) Pressure Temp (°C) Temp (°F) Pressure Temp (°C) Created Date: 12/31/2018 2:20:06 PM ...May 6, 2020 · You can notice low airflow right away by measuring the CFM (Cubic Feet Per Minute) using a rotating vane anemometer at the indoor head units and comparing that to the BTU/HR capacity of each head unit. You are looking for roughly 400 CFM per 12,000 BTU/HR of capacity but 350 to 425 CFM will still work. In this HVAC Training Video, I show the R-22 and R-410A Range of Operating Pressures on Air Conditioning Systems! I show why we Measure Pressures and Tempera...low pressure drop and low flow rates. All coaxes are pressure rated to 450 psi water side and 600 psi on the refrigerant side. Optional ThermaShield coated water-to-refrigerant coaxial heat exchanger is available to prevent condensation in low temperature loop operation. Service Connections and Serviceability Two Schrader service ports are provided So, I decided too and some 410a. The pressures before energizing the unit were 170 lbs. on both sides. Upon energizing the unit the operating pressures were 75lbs on suction side and 250 on high side. I began adding some 410a, too which I reached these pressures, 130 on suction side and 335 on high side.SUBJECT: TEMPERATURE - PRESSURE CHART FOR FYI #289 9/17/2009 R-22, R-410A, R-407C, R-134A & R-404A REFRIGERANTS ADVANTAGE Engineering, Inc.525 East Stop 18 Road Greenwood, IN 46142 317-887-0729 fax: 317-881-1277 web site: www.AdvantageEngineering.com email: [email protected] R-22 operating system typically have a high-side (discharge) pressure of 260 psig and low-side (suction) pressure of 76 psig, while a normally R-410A operating system have a high-side (discharge) pressure of 418 psig and low-side (suction) pressure of 130 psig at 45°F/7.2℃. What Should my AC Pressures Be for R410A Refrigerant. Watch on.Currently working on a Bremar ice maker. Just did a compressor change and thought I weigh charged it perfectly. But it's not making good ice. I have only a suction port to read the pressures, and I'm getting 300kpa at the beginning of the 8.5 min cycle, and around 240kpa by the end. It runs for 8.5miutes then goes on defrost to drop the ice made.Jan 16, 2023Pressure chart for all temperatures of the R-410A refrigerant. Diagnose problems for your Puron appliance with our complete Pressure Table.These units use R-410A refrigerant which operates at 50 to 70% higher pressures than R-22. Use only R-410A approved service equipment. Refrigerant cylinders are painted a “Rose” color to indicate the type of refrigerant and may contain a “dip” tube to allow for charging of liquid refrigerant into the sys-tem. This script determines the gas pressure based on temperature of R410a refrigerant. R410A is an HFC refrigerant, invented by Honeywell, that has been developed to replace the …The low side pressure of a typical R410A mini split is between 110-140 psi depending on the operating conditions. Though it can vary, the low side pressure of a mini split should not fall below 100 psi or raise beyond 160 psi. The working pressure of mini splits is depending on factors such as the weather and cooling load.The system has 10F of superheat if the pressure is 45 psi and the temp is 32F. What are normal 410A operating pressures? A normally operating R-410A system with the same condensation temperature of 120 degrees and a 45 degree evaporator saturation temperature will have a high side pressure of 418 psig and a low side pressure of 130 psig.Normally R-22 operating system typically have a high-side (discharge) pressure of 260 psig and low-side (suction) pressure of 76 psig, while a normally R-410A operating system have a high-side (discharge) pressure of 418 psig and low-side (suction) pressure of 130 psig at 45°F/7.2℃. What Should my AC Pressures Be for R410A Refrigerant. Watch on.00:00 - What are normal pressures for R410A?00:37 - Can you pump down a 410A system?01:04 - What should my gauges read on 410A?01:39 - Can you put R22 in a R...r-410a pressure temperature chart psig f° psig f° psig f° psig f° psig f° psig f° 12 -37.7 114 37.8 216 74.3 318 100.2 420 120.7 522 137.6 14 -34.7 116 38.7 218 74.9 320 100.7 422 121 524 137.9 16 -32.0 118 39.5 220 75.5 322 101.1 424 121.4 526 138.3R448a PT chart is quite useful in HVAC. It tells you what is the pressure of R488a liquid and vapor refrigerant from -49°F to 150°F.Inversely, you can also tell the temperature of R488a refrigerant if you know the pressures (from 0.7 psig to 462.8 psig).Further on, you will find an online R448a pressure temperature chart as well as a printable R448a PT chart in …It can be used for recharging refrigerant, or to diagnose an a/c system based on pressure readings from your gauges. Ambient Temperature (°F) Low Side. High Side. 110°. 50-55 psi. 335-345 psi. 105°. 50-55 psi.The operating pressures and temperatures of 1234yf are VERY similar to that of 134a. As I said before this was done intentionally to make for an easy transition. Refer back to my fact sheet above to see the boiling temperatures. 1234yf uses PAG oil just like R-134a but please note that it uses a different type of PAG oil.This means that we need to set up equipment not to freeze during normal operating conditions. A typical residential A/C system should be set up so that the return temp can get all the way down to 68° and still be just above freezing. Let's say it's 78° in a house on an R410a system, and your suction pressure is 108 PSIG (as shown). R-410A operates at pressures 50 to 70% higher t605.5. 150. 613.9. 613.0. R410 TemperatureSo, I decided too and some 410a. The pressures b
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Cooling Pressure (PSI) @ Service Port (Tolerance +/‐5) Outdoor Temp (°F) Refrigerant Pressure vs. Temperature Charts for Pioneer Split Systems (R410a) 68 115 119 123 127 131 135 139 143 147 71 120 124 128 132 136 140 144 148 152 ‐ m p (°F) 74 125 129 133 137 141 145 149 153 157The sub-cool chart uses the same top row for reference and its own ambient temp column. The numbers are all based on 70-80* indoor ambient temps at normal humidity. Yes, sub-cool is best but the ambient temps must be in range which they are. The chart pressures should still be close when using sub-cool.*Red Italics Indicate Inches of Mercury Below Atmospheric Pressure Saturation Pressure-Temperature Data for R407C (psig)* Temp ( F) Pressure Temp ( C) Temp ( F) Pressure Temp ( C) Temp ( F) Pressure Temp ( C) Created Date 12/31/2018 2:19:45 PM ...Normal R-22 systems operate with high pressure of about 260 psi at 120° temperature and low pressure of about 76 psi at 45° evaporator temperature. R-410A. R-410 is also known as “Puron.” This refrigerant is recommended for use in new residential AC units.Technicians with R-22 experience will need to become familiar with working with high and low side pressures that are much higher when using R-410A. A typical R-22 system operating normally with a ...R454B PT chart with PDF here. R134A PT chart is a standard table. Basically, this 134A PT chart tells you what is the pressure of R134A refrigerant at certain temperatures. The charts start at the low end (-49°F) and tell you the pressures all the way to the high end (150°F).Pressure chart for all temperatures of the R-410A refrigerant. Diagnose problems for your Puron appliance with our complete Pressure Table.During air conditioning mode, the pressure on the vapor line of an R-410A system will be somewhere between 102 to 145 PSIG. If the system had R-22, the vapor pressure would be between 58 to 85 PSIG but these pressures will be dependent on the wet bulb temperature inside the building and the ambient temperature outside the building.Mar 1, 2020 · What is the pressure for 410A refrigerant? According to Refrigeration Service Engineers Society, R-410A operates at a suction pressure of 118 psi and a discharge pressure of 400 psi. This refrigerant operates at pressures 50 to 70% higher than those of R-22 (typically operates with a suction pressure of about 68 psi and a discharge pressure of ... In this HVAC Training Video, I show the R-22 and R-410A Range of Operating Pressures on Air Conditioning Systems! I show why we Measure Pressures and Tempera... What is the normal operating pressure of R-410A? Mini-splits air conditioners depend on the refrigerant for their proper functioning. The refrigerant passes through copper tubing between the indoor unit and the outdoor unit. As it passes through a mini-split system, it moves heat from one side of the air conditioning system to the other. Mini ...Freon™ 410A is intended for use in new air conditioning applications that have traditionally been serviced by HCFC-22. Many other applications are also possible, such as medium- and low-temperature refrigeration. Due to the significantly higher pressures that Freon™ 410A exhibits compared to HCFC-22, a typical compressor designedComparing R404A and R410A with a Short Explanation of Both. R404A and R410A are two refrigerants that are commonly used in AC units. The differences between these two refrigerants come down to the pressure level, their chemical composition, and their efficiency. R404A is a hydrocarbon refrigerant that has a high pressure level of …The system has 10F of superheat if the pressure is 45 psi and the temp is 32F. What are normal 410A operating pressures? A normally operating R-410A system with the same condensation temperature of 120 degrees and a 45 degree evaporator saturation temperature will have a high side pressure of 418 psig and a low side pressure of 130 psig.Hypertension is characterized by high blood pressure, and it’s an important risk factor for heart disease. It’s a modifiable risk factor, which means you can make lifestyle changes to lower your blood pressure and improve your health.The refrigerant is a HFC blend consisting of five components. They include 8.5% of R32, 45% of R125, 44.2% of R134A, 1.7% of Butane (R600A), and 0.6% of iPentane (R601A). HVAC technicians usually use R438A as a retrofit replacement for R22. Retrofit replacements require the technician to change the system’s components, including the …Generally, you will see normal superheat (8°-14°) on a system with heat mode TXV, and the subcooling will generally be a bit higher than usual, especially when measured outside. Suction Pressure/EVAP DTD Rule of Thumb Another common old-school rule of thumb is that suction pressure should be close to the outdoor temperature in an R22 system.So, I decided too and some 410a. The pressures before energizing the unit were 170 lbs. on both sides. Upon energizing the unit the operating pressures were 75lbs on suction side and 250 on high side. I began adding some 410a, too which I reached these pressures, 130 on suction side and 335 on high side.Comparing R404A and R410A with a Short Explanation of Both. R404A and R410A are two refrigerants that are commonly used in AC units. The differences between these two refrigerants come down to the pressure level, their chemical composition, and their efficiency. R404A is a hydrocarbon refrigerant that has a high pressure level of …ACHR NEWS: In terms of properties and performance, how does R-454B compare to R-410A (e.g., efficiency, capacity, pressures, discharge temperatures)? Spletzer: From a properties and performance standpoint, R-454B is a very close match to R-410A. That was the goal when this refrigerant blend was designed — a product that …Cooling Pressure (PSI) @ Service Port (Tolerance +/‐5) Outdoor Temp (°F) Refrigerant Pressure vs. Temperature Charts for Pioneer Split Systems (R410a) 68 115 119 123 127 131 135 139 143 147 71 120 124 128 132 136 140 144 148 152 ‐ m p (°F) 74 125 129 133 137 141 145 149 153 157 What is the suction pressure of a Mitsubishi R410a? Normally R-22 operating system typically have a high-side (discharge) pressure of 260 psig and low-side (suction) pressure of 76 psig, while a normally R-410A operating system have a high-side (discharge) pressure of 418 psig and low-side (suction) pressure of 130 psig at 45°F/7.2℃.Apr 2, 2017 · Our Ebook, Paperback, Workbook, Quick Cards: https://www.acservicetech.com/the-book This video is on Normal Operating Pressures are for Freon R22 and R410A R... The manual states that the design pressure should be 255/465 psi. The running pressure is about 200 on the fluid line and 150 on the exhaust line. This is what my installer feels like a good pressure. However, the company that sold me the system said that the pressure should be ~100psi on either line.It can be used for recharging refrigerant, or to diagnose an a/c system based on pressure readings from your gauges. Ambient Temperature (°F) Low Side. High Side. 110°. 50-55 psi. 335-345 psi. 105°. 50-55 psi.R410A PRESSURE-TEMPERATURE CHART Saturation Pressure-Temperature Data for R410A (psig)* ECLPC-1 Rev 1 – 02/22. Created Date: 2/25/2022 1:24:53 PM ... A normally operating R-410A system with the same condensing temperature of 120 degrees and a 45 degree evaporator saturation temperature will have a high side pressure of 418 psig and a low side pressure of 130 psig. What are normal operating pressures for 410A on a 70 degree day? The operating pressure of 410A on a 70 degree day is 201.5 psig.Our Book https://www.acservicetech.com/the-book In this HVAC video I go over the reasons why the low side, vapor, suction pressure may be lower than normal w...The operating pressure of 410A on a 70 degree day is 201.5Jun 24, 2020 · We will first examine the low-pressur
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The operating pressure of 410A on a 70 degree day is 201.5 psig. What is the static pressure for R-410A? R410A runs much higher pressures even in static. If it were an R410A system with 75 degrees, then we would be …We can see that at 72°F, the R410A pressure is 208,4 psig. Example 2: What are 410A pressures on ... See moreRefrigerants - Saturation Pressures vs. Temperatures. Temperature and pressure diagram for constant boiling refrigerants - imperial and SI units. Temperature and pressure chart for refrigerants R22, R410A, R12, R134A, R401A, R409A, R502, R404A, R507A, R408A and R402A.R410A and R407C show very similar performances with a slight advantage of R407C at higher pressure ratio, i.e. condition 2 and 3 in the above graphs. R410A compressors operate with a higher discharge temperature and therefore utilize unique engineering 2 2.5Jul 5, 2019 · Digital Fieldpiece Gauges: https://amzn.to/2LFjNnKR410A Equipment: https://amzn.to/2xv6AG5My Favorite Tool: https://amzn.to/3NIFJuOTools We Recommend: https:... Cooling Pressure (PSI) @ Service Port (Tolerance +/‐5) Outdoor Temp (°F) Refrigerant Pressure vs. Temperature Charts for Pioneer Split Systems (R410a) 68 115 119 123 127 131 135 139 143 147 71 120 124 128 132 136 140 144 148 152 ‐ m p (°F) 74 125 129 133 137 141 145 149 153 157High pressure cut out / cut in, PSIG 400 / 300 Compressor Amps, beg . - end, freeze 8-6 .5 Compressor Amps, harvest 9 .3 Cycle Time (minutes) Water cooled Ambient Air Temp (deg . F) Water Temp 70 80 90 50 10 12 12 70 11 13 13 80 12 13 13 Page 16 ...R410A PRESSURE-TEMPERATURE CHART Saturation Pressure-Temperature Data for R410A (psig)* ECLPC-1 Rev 1 – 02/22. Created Date: 2/25/2022 1:24:53 PM ...R-410A operates at pressures 50 to 70% higher than those of R-22. What is the higher pressure of R-410A? Normally R-22 operating system typically have a high-side (discharge) pressure of 260 psig and low-side (suction) pressure of 76 psig, while a normally R-410A operating system have a high-side (discharge) pressure of 418 psig …Are you confused about all the different blood pressure readings? You aren’t alone. Read this quick guide to learn more about the difference between systolic and diastolic, what normal readings are and what low diastolic means.Jul 4, 2015 · Posts. 20,626. Post Likes. Head on 410 at 100° will be in the 375 - 400 range depending on surrounding conditions, sun, heat load inside, dirt on the coil. high suction pressure could be from a high load, bad compressor, bad-wrong-nonexistant metering device. There are a multitude of things that can cause pressures to be high or low depending ... r-410a pressure problem, 285/120 psig. i just installed a new split unit r-410a a/c system. it is running at 285/120 psig. the high side seems way low, should be about …R-410A Low-Side Typical Operating Pressure-Range = 102-145 psig (varying by indoor wet bulb temperature and outdoor ambient temperature, where higher heat loads increase the vapor line pressure) Other Properties for R410A Refrigerant R410A temperature/pressure relationship: see the table aboveDuring air conditioning mode, the pressure on the vapor line of an R-410A system will be somewhere between 102 to 145 PSIG. If the system had R-22, the vapor pressure would be between 58 to 85 PSIG but these pressures will be dependent on the wet bulb temperature inside the building and the ambient temperature outside the building.mixed or blended refrigerants such as R407C and R410A, in which multiple refrigerants with different boiling points are mixed, their isothermal lines have gradients in the saturated area, so the saturation temperatures under certain pressure are different at the liquid side and the gas side. They are called zeotropic refrigerants,Items Displayed in Black shows pressure in pounds per inch gauge. Data points are reproduced based on available information. Advantage assumes no responsibililty or liabilitly for data errors. For more information on …psig °f psig °f psig °f psig °f psig °f 12; -37.7. 114R-410A Pressure-temperature chart Click anywhere on this document to return to Refrigerant Gas Properties information at InspectApedia.com This chart was provided by the Bonneville Power Authority, Forane 410A Pressure Temperature Chart Forane 410A, R-410A, Pressure Temperature Chart, PT Chart, HVAC, refrigeration, air conditioning, refrigerant gasThis screenshot of the Ref Tools app shows the vapor line pressure of R410A at saturation at 39°F. Notice how the slider has been set to DEW point (inside the orange box). Before we even hook up our gauges/probes, we know the system operating pressures should be within +/- 10 PSI of: Liquid Pressure: 356.5 PSIG. Vapor Pressure: 116.1 PSIGDuring air conditioning mode, the pressure on the vapor line of an R-410A system will be somewhere between 102 to 145 PSIG. If the system had R-22, the vapor pressure would be between 58 to 85 PSIG but these pressures will be dependent on the wet bulb temperature inside the building and the ambient temperature outside the building.Oct 17, 2020 · Normally R-22 operating system typically have a high-side (discharge) pressure of 260 psig and low-side (suction) pressure of 76 psig, while a normally R-410A operating system have a high-side (discharge) pressure of 418 psig and low-side (suction) pressure of 130 psig at 45°F/7.2℃. What Should my AC Pressures Be for R410A Refrigerant. Watch on. by ziauddin khan khan , Electrical and supervisor , Majal Service Company. …See more. hi, anyone familar with R410A. For air conditioning system, R22 pressure in discharge is250psi and suction in67psi. But for R410A pressure will be more higher that R22. So what pressure is normal for air-conditioning systems. Besides that normal R22 ...Nov 17, 2021 · The low side pressure of a typical R410A mini split is between 110-140 psi depending on the operating conditions. Though it can vary, the low side pressure of a mini split should not fall below 100 psi or raise beyond 160 psi. The working pressure of mini splits is depending on factors such as the weather and cooling load. 18 PRESSURE (PSIG) Sat. Temp (°F) R-22 R-407C Liquid Pressure R-407C Vapor Pressure R-410A Liquid Pressure R-427A Liquid Pressure R-427A Vapor Pressure R-407A Liquid 18 вер 2020 г. ... ... pressure your refrigeration equipment is still running, but the ... The result is higher than normal suction pressure. The results of ...Normally R-22 operating system typically have a high-side (discharge) pressure of 260 psig and low-side (suction) pressure of 76 psig, while a normally R-410A operating system have a high-side (discharge) pressure of 418 psig and low-side (suction) pressure of 130 psig at 45°F/7.2℃.It isn't 2oz/yr leak. It's 5 x 2oz that's lost from service hose. This is significant for a smaller system that only holds about 3 lbs. Use a stubby gauge on high side if you need to hook into it. Just because it's "de minimis" in EPA's view doesn't mean repeated such losses don't affect system operation.What are normal operating pressures for 410A on a 70 degree day? If a new R-410A refrigerant bottle had a surrounding air temperature of 70°F, the pressure inside the bottle would be 201 PSIG. Likewise, an R-410A recovery bottle with a surrounding air temperature of 70°F should have an internal pressure of 201 PSIG. Online R454B pressure temperature chart spanning from -