The temperature glide for R-410a is less than _____ degrees Fahrenheit over air conditioning and refrigeration operating ranges. ... The low pressure control on R-410a systems will open at: Absolute discharge pressure divided by absolute suction pressure. Compression ratio is calculated as: 40% to 70% higher. Both suction and discharge pressure ...Remember, if the discharge temperature is 225 degrees, the actual discharge valve will be about 75 degrees hotter. This will bring the actual compressor's discharge valve to 300 degrees. It is a known fact that most oil may start to break down and vaporize at 350 degrees. If this occurs, serious overheating problems will happen.Updated on February 12, 2024. The average temperature output of a heat pump is 85°F to 92°F in heat mode without auxiliary heat. Typically, a heat pump will produce a temperature differential of 15-20°F warmer than the current air temperature in heat mode. The air temperature from a heat pump can vary with the age and condition of your heat ...This would typically cause a low suction pressure, and a low superheat. In heat mode, a dirty air filter causes low airflow across the condenser. This can cause extremely high head pressure. In heat mode, a dirty outdoor coil can cause a low suction pressure. As an example, Trane includes a pressure curve chart with many heat pump condensing units.Pressure-Temp Chart-40-35-30-25-20-15-10-5 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120 125 130 135 140 145 150 11.6 14.9 18.5 22.5 26.9 31.7 36.8 42.5 48.6 55.2 62.3 70.0 78.3 87.3 96.8 107 118 130 142 155 170 185 201 217 235 254 274 295 317 340 365 391 418 446 476 507 539 573 608 Physical Properties of ...Critical Pressure (psia) 658.6 Critical Temperature (°F) 181 Critical Density (lb./ft^ 3) 31.4 Vapor Density (bp,lb./ft^ 3) 0.291 Heat of Vaporization (bp,BTU/lb.) 100.8 Global Warming Potential (CO2 = 1.0) 1923 ASHRAE Standard 34 Safety Rating A1 Physical Properties Liquid Density Refrigerant -80°F -40°F 0°F 40°F 80°F 120°F R-407AAt 120°F, the pressure of R290 refrigerant exceeds 200 psig. If you are working in HVAC, having the R290 PT chart on hand will help in several tasks, including: Determining the pressures of R290 on 65-degree, 70-degree, 75-degree, 80-degree, 85-degree, 90-degree, 95-degree, 100-degree days, and so on. We use 3 examples for 60-100 …The head pressures at 91F outside prove that the system is over charged or that the condenser coil is dirty (or both to some degree). The frosty feeder tubes (you are calling cap tubes) but no frost on the coil indicate that there might have been an R-22 compressor in the system at one time, those hold mineral oil, mineral oil and R-410a combine to make a waxy sludge that could partially block ...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 420. the correct orifice is installed. this is a 1.5 ton condenser, 2 ton evaporator, and a 0.051 inch orifice. thanks for any suggestions. hvac.A "degree day" is determined by comparing the daily average outdoor temperature with a defined baseline temperature for indoor comfort (in this case, 65°F). For example, if the average temperature on a particular day is 78°F, then that day counts as 13 cooling degree days, as a building's interior would need to be cooled by 13°F to ...The charts start at the low end (-49°F) and tell you the pressures all the way to the high end (150°F). Example: What is the pressure of 134A freon at 85°F? You just chart the chart (found below) and you will see that at 85°F, the pressure of R134A is 95.2 psig (pounds per square inch gauge). Measuring the pressure of R134A refrigerant on a ...pressure-temperature chart ... ( r-123) (r-134a) (r-404a) (r-410a) (r-507) (r-508b) -120 3.0 -84.8 -115 5.9 -81.7 -110 9.2 -78.9 -1051 2.8 -76.1 -1001 6.9 -73.3 -95 21.4 -70.6 -90 26.4 -67.8 -85 31.9 -65.0 -80 37.9 -62.2 -75 10.2" 44.5 -59.4 -70 7.0" 51.5 -56.7 -65 3.4" 59.6 -53.9 -60 12.4" 0.3 ...Lennox gives specific instructions for charging their units in below 65˚ outdoor ambient conditions. ... on an R-410A system. A more applicable guideline is 20˚-25˚ suction saturation below outdoor ambient. This means if it is 50˚ outside the suction saturation temperature should be between 25˚and 30˚ (on most systems). Head Pressure ...What Are 410a Pressures on a 95 degree day? [High & Low side … Preview. 8 hours ago WebJan 16, 2023 · Find the typical 410a pressures on a 95 degree day for liquid and vapor phases, as well as the high and low side pressures for different temperatures of the …. See Also: Goodman 410a charging chart Show detailsMake your job easier with our handy refrigerant pressure temperature HVAC app with R-410A included.65 445 430 415 400 385 370 355 340 325 7 0 460 445 430 415 400 385 370 355 340 d oor Temp (° 75 475 460 445 430 415 400 385 370 355 Charts provided herein are for indicative purposes only. Various other conditions may effect the system pressures, such as air indoor speed, humidity levels, piping length, etc. Please useBoth older R-22 and R-134 operate at lower pressures than R-410A. R22 Refrigerant Pressure Rules of Thumb Typical Off, Low, High side R22 Pressures & Temperatures. On a properly-charged and working air conditioning system using R-22 refrigerant. Low pressure refrigerant switches on Carrier HVACR typically open at 50 psi and close at 100 psi.Jan 16, 2023 · Vapor pressure for 410a on a 85 degree day is: 254.6 psi. Example 2. What should the 410a pressures on a 50, 65, 70 degree day be? On a 50 degree day. Liquid pressure: 143.2 psi. Vapor pressure: 142.6 psi. On a 65 degree day. Liquid pressure:185.8psi. Vapor pressure: 185.2 psi. On a 70 degree day. Liquid pressure: 201.8 psi.The pressure-temperature (PT) chart is a valuable tool that service technicians use to check proper system operation. PT charts are most often used for three purposes: to set a coil pressure so that the refrigerant produces the desired temperature, to check the amount of superheat above the saturated vapor condition at the outlet of the ...I originally wrote this guideline back in 2003, and truthfully, not much has changed since then in regards to checking a heat mode charge on a heat pump. Step #1 – If there is any frost on the outside unit, get it completely defrosted first. Step #2 – Check all the obvious things first, filter, coils, blower wheel, etc.R-134A. If R-410A is ingested. do not induce vomiting. Liquid lines used with R-22. May be used with R-410A if sized and properly cleaned. Whenever possible, to avoid fractionation, charging of a refrigeration system incorporating a near-azeotropic blend should be done with. Liquid refrigerant. R-407C pressures and temperatures are similar to.which uses Genetron 410 (R-410a) when the pressure at the evaporator outlet reads 120 psig and your surface thermometer reads 50°F 120 psig yields ~ 41°F Degree of Superheat = 50°F - 40°F = 10°F SUBCOOLING Procedure: • Use gauges to determine the pressure at the condenser coil outlet, and a thermometer to get the actualR-410A Low Side Pressure 2: R-410A High Side Pressure 3-10°F: 26.9 psi-23.3 : 0°F: 48.4 -17.8 : 10°F: 62 : 32°F: 101.4: 0 : 40°F: 119 : 83 psig: 257 psig: 45°F: 120 : 130: 418: 51°F: 145 : 55°F: 155 : 60°F: 170.7: 15.6 : 62°F: 175 : 64°F: 180 : 66°F: 185 : 70°F: 201 : 72°F: 205 : 73°F: 210 : 75°F: 218.7: 23.9: 120 psig: 410-420 ...The degree of superheat was maintained constant by an ... leading to a GWP equal to 285 and a similar critical pressure compared to R-410A. The other binary blend was composed of 22% and 78 ... [65]. Although R-410A is the refrigerant mixture with the lowest glide, DR-5, DR-5A, and DR-55 are refrigerants that also did not ...What is the low side and high side pressure for R410A? A typical R-22 system operating normally with a head pressure of 260 psig at a 120-degree condensing temperature and a low side pressure of 76 psig at a 45-degree evaporator saturation temperature will find the equivalent pressures in a R-410A system to be much higher.15 Hole Locations For Reading Coil Pressure Drop . . . . . . 23 16 J25NC - Pressure Drop Vs. Cfm Across Dry Indoor Coil 24 ... This system uses R-410A Refr igerant which operates at higher pressures than R-22. No other refrigerant may be ... 208/230-3-60 187 253 8,000 12,000 65/57 95/72 40 77 460-3-60 414 506 8,000 12,000 65/57 95/72 40 77Saturation pressures of R-410A, -22, and -134a for a range of temperatures in a/c applications. OPERATING PRESSURE POINTS. “Systems using R-410A operate at higher pressures [than R-22],” points …Jun 3, 2014 · 410a pressure. I installed a 410a, 2 ton condenser and coil today. The low side was 120 with 10 degree super heat, just like the manufacturer recommendations, but the high side was 475psi with 40 degree of subcooling. I felt like 475psi on a 80 degree outdoor temp was really high. Delta T was 14 indoor and the indoor wet bulb was 64degree.Constants for vapor pressure of saturated vapor (dew point), p g: A = –1.440004 E+00 E = –3.521484 E+00 B = –6.865265 E+00 F = –7.750000 E+00 C = –5.354309 E–01 X o = 2.086902 E–01 D = –3.749023 E+00 Because both pressure and temperature appear in the reduced form in the equation, the same constants can be used for either SI or ...Critical Pressure (psia) 658.6 Critical Temperature (°F) 181 Critical Density (lb./ft^ 3) 31.4 Vapor Density (bp,lb./ft^ 3) 0.291 Heat of Vaporization (bp,BTU/lb.) 100.8 Global Warming Potential (CO2 = 1.0) 1923 ASHRAE Standard 34 Safety Rating A1 Physical Properties Liquid Density Refrigerant -80°F -40°F 0°F 40°F 80°F 120°F R-407AThey recorded a 245 psi Head pressure and 115 suction pressure on my installation receipt. He also wrote "10 degrees subcool" on the receipt, which I don't see how that is possible when a 245 psi equals 83 degrees on an R-410a P/T chart. The small, copper liquid line (when measured near the compressor valve) doesn't seem to heat up much at all ...TEMPERATURE - PRESSURE CHART FOR R-22, R-410A, R-407C, R-134A & R-404A REFRIGERANTS FYI #289 9/17/2009. updated 10/10/2012. Data points are reproduced based on available information. Advantage assumes no responsibility or liabililty for data errors. ADVANTAGE Engineering, Inc. 525 East Stop 18 Road Greenwood, IN 46142 …Apr 14, 2015 · Let's get started and see what we can do.Most manufacturers recommend charging by super heat and subcoolimg rather than pressures alone,and will vary slightly by manufacturer but as a rule low side of about 110 and high side about 280at 70 degree ambient. This will of course increase as temp warms up.ON an 85 degree day,probably 130 to 135 and ...I installed a new 410a complete system with new Orfice coil and new lineset. 70 degrees on install date and initial start up. Suction pressure was 110 and high side of 280. ... Today I checked that unit ona 92 degree day and the Suction P was 128 and the Liquid P 375. With Superheat at 8 and Subcooling at 11. The unit has been working good for ...Let's use the target superheat formula and calculate this manually: Target Superheat (R-410A) = (3 × 69°F - 80°F - 105°F) / 2 = 11.0°F. We see that the target superheat for R-410A refrigerant in this system is 11°F. You can use the target superheat calculator above to get to this result much quicker.Jan 7, 2019 · SUCTION PRESSURE / EVAP DTD RULE OF THUMB Another common old school rule of thumb is suction pressure should be close to the outdoor temperature in a R-22 system. However, this rule of thumb (obviously) does not work on an R-410A system. A more applicable guideline is 20˚-25˚ suction saturation below outdoor ambient.Using a 410a subcooling calculator can help optimize your system's performance and troubleshoot issues. And remember, 410a refrigerant is the more eco-friendly and efficient choice compared to 404a. Don't forget to practice regular maintenance and keep your system in tip-top shape. Happy cooling!The operating pressure of 410A on a 70 degree day is 201.5 psig. What should 410A pressures be at 90 degrees? 410A PT Chart For Degrees Of Fahrenheit (°F) Temperature (°F)Pressure (psig)90 °F274.3 psig95 °F295.0 psig100 °F316.9 psig105 °F339.9 psig85 more rowsOutdoor ambient temperature. Typical low pressure or suction side pressure for R410A is about 120 psi,varying by ambient temperature,here assuming 75°F,may vary by equipment and metering controls. Typical high side pressure for R410A is < 600 psi at an ambient outdoor temperature of 95 °F,may vary by equipment.We would like to show you a description here but the site won't allow us.Using a 410a subcooling calculator can help optimize your system’s performance and troubleshoot issues. And remember, 410a refrigerant is the more eco-friendly and efficient choice compared to 404a. Don’t forget to practice regular maintenance and keep your system in tip-top shape. Happy cooling!410a ductless mini split operating pressures. I know that you should rarely put gauges on a ductless mini split, and that you should dump the charge and just weigh it in. I have heard that there are spec sheets that will give you "normal operating pressures" based on indoor and outdoor conditions. This would come in handy when servicing systems ...65 445 430 415 400 385 370 355 340 325 7 0 460 445 430 415 400 385 370 355 340 d oor Temp (° 75 475 460 445 430 415 400 385 370 355 Charts provided herein are for indicative purposes only. Various other conditions may effect the system pressures, such as air indoor speed, humidity levels, piping length, etc. Please useR4 1 0 a p re ssu re ch a rt h i g h a n d l o w si d e Temp(° F ) Li qui d P ressure (psi ) Vapor P ressure (psi )-49 5. 5 5. 4-48 6. 0 5. 9(R-508B) is a better replacement than Freon™ 410A. Properties Freon™ 410A is safe to use when proper storage and handling practices are followed. It is a nonflammable, low toxicity mixture of HFC-32 and HFC-125 (50/50 wt%). Freon™ 410A has been classified as A1 by ASHRAE and assigned the ASHRAE number of R-410A. It has beenDigital Fieldpiece Gauges: https://amzn.to/2LFjNnKR410A Equipment: https://amzn.to/2xv6AG5My Favorite Tool: https://amzn.to/3NIFJuOTools We Recommend: https:...Subcooling is a measurement of temperature DECREASE of a liquid below its saturation (mixed liquid/vapor) temperature at a given pressure. For example, water boils at 212° Fahrenheit at sea level (atmospheric pressure of 14.7 PSIA). If water is 212°F and at atmospheric pressure at sea level, you can be sure it is at saturation, which means it ...TEMPERATURE - PRESSURE CHART FOR R-22, R-410A, R-407C, R-134A & R-404A REFRIGERANTS FYI #289 9/17/2009. updated 10/10/2012. Data points are reproduced based on available information. Advantage assumes no responsibility or liabililty for data errors. ADVANTAGE Engineering, Inc. 525 East Stop 18 Road Greenwood, IN 46142 317-887-0729 fax: 317-881 ...It is stamped 4lbs 15oz. for the manufactures charge of 410A. 4. Last check by the tech from the company that installed it before going out of warranty was High side 275 psi, high side temp 70F, Low side psi was 115 Low side temp 50. This calculates to Super Heat of 12 more or less.On a 100-degree day, the ideal pressures for R-410A refrigerant in an air conditioning system should typically be around 250-280 psi on the high side and 90-100 …Temperature and pressure chart for refrigerants R22, R410A, R12, R134A, R401A, R409A, R502, R404A, R507A, R408A and R402A. Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications!You need at least a 50 degree IWB and 55 degree ODB at minimum to measure superheat accurately. You can block the coil to simulate your ODB target if it's too low, but be careful how much you raise the head pressure or your SH will drop to 0 degrees. Use a superheat charging chart to determine whether or not you can check the charge.65 degree rule for R-410A central AC units? Specific Inspection Topics. Inspecting HVAC Systems. fbartlo (Frank Bartlo) July 10, 2017, 4:36pm 12. So, let's say I'm doing an inspection on a house that has a typical split-system AC unit with freon refrigerant in 40some degree weather, bring a space heater, and heat the area of the unit and ...Web a refrigerant temperature pressure reference chart shows pressures at various temperatures for r22, r134a, r407c, r404a, r410a, r507a. What should the 410a pressures on a 50, 65, 70 degree day be? Web get training with johnstone university. Web r410a pressure temperature chart. On a 50 degree day.Figuring out what are pressure R407c pressures on 65-degree, 70-degree, 75-degree, 80-degree, 85-degree, 90-degree days, and so on. Further on, we show examples of what pressures should 407c refrigerant have on 65-100 degree days .1. Optimal Cooling. When the low side pressure operates within the recommended range for 410a, your system can efficiently absorb heat from your indoor environment. Any deviation from this range might compromise the cooling efficiency, leaving certain areas less cooled than others. 2.Study with Quizlet and memorize flashcards containing terms like R-410A is also known as: A Suva 410a B AZ-20 C Puron D All of the above, The temperature glide for R-410A is less than _____ degrees F over air conditioning and refrigeration operating ranges: A 0.3 B 0.9 C 1.0 D 1.5, Both suction and discharge pressures of R-410A systems are _____ than R-22: A The same B 40% to 70% higher C 60% ...1. Attach your manifold gauge set to the high and low side ports and read the low and high-pressure gauges. They should be the same. 2. Measure ambient air temperature at the vehicle and under the hood WITH A THERMOMETER (do not use weather service temperatures). The static pressure correlates to the temperature of the AC components under the hood, not outside in front of the vehicle.This is where our friend R-410A came into play. New machines from 2010 and onwards were banned from using R-22. Instead, they were outfitted with R-410A. If you would like to read more about R-410A refrigerant please have a look at our Puron fact sheet. R-410A PT Chart. Let’s take a look at our pressure table for R-410A Puron.It is stamped 4lbs 15oz. for the manufactures charge of 410A. 4. Last check by the tech from the company that installed it before going out of warranty was High side 275 psi, high side temp 70F, Low side psi was 115 Low side temp 50. This calculates to Super Heat of 12 more or less.Refrigerant Pressure - Temperature Chart. Pressure values are displayed for R-22, R-410a, R-407c, R-134a and R-404a refrigerants. Items Displayed in Red shows pressure in inches of Mercury. Items Displayed in Black shows pressure in pounds per inch gauge. Data points are reproduced based on available information.65° 18.3° 111.3: 767.4: 7.7 ... R22 boiling point: -40.8 degree Celsius at atmospheric pressure (sea level or 1 ATM) R22 density: 3.66 g/cm 3, in gas form - this is a colorless gas; ... Both older R-22 and R-134 operate at lower pressures than R-410A. R22 Refrigerant Pressure Rules of Thumb Typical Off, Low, High side R22 Pressures ...For the R404a refrigerant at a temperature of -60ºC, the corresponding pressure is typically below its usual operational range. To find the exact value, you should consult the pressure-temperature (PT) chart specific to R404a. We currently have no such data in hand.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 ...Calculate. This free online tool allows HVAC professionals to quickly calculate Superheat and Subcooling measurements for both R22 & R410A refrigerants.pressure-temperature chart ... ( r-123) (r-134a) (r-404a) (r-410a) (r-507) (r-508b) -120 3.0 -84.8 -115 5.9 -81.7 -110 9.2 -78.9 -1051 2.8 -76.1 -1001 6.9 -73.3 -95 21.4 -70.6 -90 26.4 -67.8 -85 31.9 -65.0 -80 37.9 -62.2 -75 10.2" 44.5 -59.4 -70 7.0" 51.5 -56.7 -65 3.4" 59.6 -53.9 -60 12.4" 0.3 ...The operating pressure of 410A on 65-degree day is 185.7 psig. R410A Pressure-Temperature Chart For Degrees Of Celsius (°C) As you can, the pressure at a specific temperature is usually given in 3 different units: barA. Known as “ absolute pressure “; pressure against a perfect vacuum. It’s calculated as … See moreSo if it's 85º out the saturation pressure in the system (that's been sitting off) should be 255 psi for 410a. If it's much different than that, then you would want to treat it as contaminated refrigerant when recovering. I assume 5 below would mean 80º in this example to account for the indoor coil being colder, so 236 psi.1000 600 400 200 Enthalpy (BTU/lb) 140 410A Refrigerant (R-410A) P-H Diagram (ENG Units) Enthalpy (BTU/lb)At 35 degrees Celsius, the low pressure gauge should read between 50-55 psi, and the high pressure gauge should read between 275-300 psi. Thank you!-BDP. Reply. Andy Tollinger on September 23, 2018 at 11:51 am. ... On a 95 degree day, the low side should be reading at or around 35 PSI, so it sounds like the A/C is in normal working condition. ...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 75.5 322 101.1 424 121.4 526 138.3(The 2 degrees is because 15°C is 2 degrees below the base temperature of 17°C, and the 0.5 days are because 00:00 to 12:00 is half a day. We calculate the heating degree days for each period in the day, and then add them together to get the total for that day: 1.5.)The operating pressure of 410A on 65-degree day is 185.7 psig. Do you charge 410A upside down? Connect the yellow hose on the manifold gauge to the 410A refrigerant tank. Turn the handle on top of the tank to release refrigerant from the tank. Flip the tank upside down so that it will charge the system in a liquid state.The pressure cooker is a must-have kitchen appliance these days. It can do everything from make delicious stews to defrost meats in no time. However, there’s much more that this wo...What should 410A pressures be on a 75 degree day? If a new R-410A refrigerant bottle had a surrounding air temperature of 75°F, the pressure inside the bottle would be 217 PSIG. Likewise, an R-410A …November 2, 2003. Several major manufacturers are producing comfort air conditioning equipment using refrigerant 410A. The trend towards the use of R-410A continues to grow and there is a demand for technicians who are comfortable working with this higher-pressure replacement for refrigerant 22. Due to the differences between R-22 and the …Using a 410a subcooling calculator can help optimize your system's performance and troubleshoot issues. And remember, 410a refrigerant is the more eco-friendly and efficient choice compared to 404a. Don't forget to practice regular maintenance and keep your system in tip-top shape. Happy cooling!minimum Evaporator pressure for 410A. 235 PSIG. Full tank of nitrogen pressure. 2500 PSIG. Compound Gauge pressure scale. 0-250PSIG with 550 retard. High side gauge range. 0-800 PSIG. Ratings for manifold hoses. 800 PSIG working pressure 3000 burst. The size of a 410A metering device compared to an R22 metering device.On to what’s changed. Ok, so obviously the refrigerant has changed but the big and noticeable difference here is the pressure change. 410A is anywhere from fifty to sixty percent higher pressure than R-22. So, while the basic design and operating procedures of 410A remain the same as R-22 extra caution should be paid to 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.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℃.The heat pump will need to be recharged to restore, discharged pressure are 40% to 70% greater than R-2, Jan 3, 2019 ... Jesse shows his process of checking the charge of a Carrier heat pum, May 24, 2012 ... I assume r-22 refrigerant by the pressure., With 75 indoor you should be running approximately 190 on the low side. The correct way to charge the u, Normal operating temperatures for R-410A systems typically range bet, American Standard Heritage 15, R410A, Req Subcooling 10, installed 6 years ago. Had a line rupture about 10 , systems (it is actually slightly lower in pressure drop for equal lin, Did you also check the comp. windings? With compressors, I , Example 1: What Are 448a Pressures On A 65-Degree Day? F, Higher 410a pressures than normal? : r/HVAC - Reddit ... tr, Most mini-split manufacturers will require a pressure test in the , Lennox gives specific instructions for charging its units , May 16, 2002 · OPERATING PRESSURE POINTS “Systems using R-410A oper, Nov 27, 2018 · When connecting gauges, connect to the always-suc, and a temperature sensor, and externally by the sys, -1 47.1 46.9 -18.3 49 140.6 140.1 9.4 99 314.0 313.1 37., At 35 degrees Celsius, the low pressure gauge should .