psig °f psig °f psig °f psig °f psig °f 12; –37.7. 114Your inability to operate the equipment at 40° screwed your client over. #3 the reason you can’t find anything on operating R-410A below 65° is there is no such rule. It makes no difference what type of refrigerant you have. It’s all about the equipment that it’s in.So 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.In short, high discharge temp can commonly be caused by: Low charge (high suction superheat, low suction pressure, low subcool) Severe overcharge. Low condenser airflow. Restricted metering devices. Other restrictions (liquid line drier, suction line drier, kinked lines, clogged screens) Low discharge line temp can be caused by.psig °f psig °f psig °f psig °f psig °f 12; -37.7. 114I 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 No. 1: If there is any frost on the outside unit, get it completely defrosted first. Step No. 2: Check all the obvious things first — filter, coils, blower wheel, etc.If the outdoor ambient is below 95°F optimally you should not feel any significant temperature rise above your hand temperature (97°). Put your hand in the airflow of the condenser (outdoor unit) fan, it should be not too hot and not too cool (normally a 30° temperature rise above ambient). Too hot is a dirty coil (even if it looks clean).Since R-410A is a high-pressure refrigerant, the Storage Requirements are:A) You can store it in your truck just like R-407C. B) The storage temperature should not exceed 125 degrees F. C) The storage guideline for R-410A is the same as R-22 and other common refrigerants. D) All of the above statements are true.Mechanical Engineering questions and answers. The R-410a in Problem 4.12c is at 1000 kPa, 50 C with a mass of 0.1 kg. It is cooled so that the volume is reduced to half the initial volume. The piston mass and gravitation are such that a pressure of 400 kPa will float the piston. Find the work in the process.The pressure gauges for this refrigerant stays between 22 PSI and 57 PSI (pounds per square inch). But you have to keep in mind that there are two different sides to this chart. And you have to consider the low as well as the high side. Hence, the normal low-pressure side for R 134a needs to be less than 90 degrees.Temperature (°F): R410A Pressure (psig): -60 °F. 0.9 psig. -55 °F. 1.8 psig. -50 °F. 4.3 psig. -45 °F.Our Ebook, Paperback, Workbook, Quick Cards: https://www.acservicetech.com/the-book This video is on Normal Operating Pressures are for Freon R-22 and R-410A...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 75 85 95 105 115 2 ton cooling - 13 and 14 seer system charge chart - refrigerant 410a pressure at suction service port (psig) connect pressure gauges to suction and liquid ports on unit. measure air temperature to outdoor coil. place an "x" on the appropriate chart where the suction and liquid pressures cross.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 …Question: Saturated vapor R-410a at 60 C changes volume at constant temperature. Find the new pressure, and quality if saturated, if the volume doubles. Repeat the problem for the case where the volume is reduced to half of the original volume. Saturated vapor R-410a at 60 C changes volume at constant temperature.Since R-410A is a high-pressure refrigerant, the Storage Requirements are:A) You can store it in your truck just like R-407C. B) The storage temperature should not exceed 125 degrees F. C) The storage guideline for R-410A is the same as R-22 and other common refrigerants. D) All of the above statements are true.With the right music degree, you could be on the way to your dream job in the music business. Updated May 23, 2023 thebestschools.org is an advertising-supported site. Featured or ...What are the ordinary static pressures that you all are used to for a 410A unit on a 65 degree day? I'm working on a York condenser that went out on Low Pressure weeks ago. I topped her off with a few pounds of 410A and now it trips on High Pressure, but I was confident in my original charge because of the pressures/temps I observed at the time.Jul 23, 2016 ... Tutorial on How to Use and Read a REFRIGERANT GAUGE SET to read pressure, saturated temperature, superheat, and subcooling.When operated at a 35 degC ambient temperature, the suction pressure of an Air-Conditioner with R410A refrigerants ranges from 115 to 125 Psig. At these operating conditions, the discharge pressure is around 400 Psig. R-410A operates at 50 to 70% higher pressures than the R-22. Last updated: 19 days ago – 12 co-authors – 9 users.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.R410A Pressure-Temperature Chart. Liquid. Vapor. Liquid. Vapor Liquid. -49. 5.5. 5.4. -45 1. 49.7 49.5. -17.2 51. 145.8 145.2. 10.6 101. 323.1 322.1. 38.3 -48. 6 5.9. -44.4 2. 51.1 …Nov 27, 2018 · When connecting gauges, connect to the always-suction port on the low side. On quite a few systems, you can get your head pressure on the liquid line, but some systems may require you to connect to the discharge line to check the head pressure. A common rule of thumb is the 100-degrees over ambient rule; the temperature of the discharge line on ...Calculate. This free online tool allows HVAC professionals to quickly calculate Superheat and Subcooling measurements for both R22 & R410A refrigerants.The suggested orifice of .56 was installed in the A coil from the envelope attached to the Compressor unit. In operation I am only getting a reading of 65psi low side and 285psi high side. The outside ambient temperature was between 80-90F degrees. I believe I should be getting a low side pressure of 118-145 psi. It seems to me not.The process of assembling the data and chart above is the same as for the heating degree days example above, except, because we don't have midnight temperature readings to precisely mark the start and end of the day, we also include the last temperature reading from the previous day (23:55 on 2019-06-06) and the first temperature reading from the …R-410A Considerations: The IPR will open at a pressure 550 - 625 psig for R-410A systems. The high pressure switch opens at 610 psig ±. 10 psi g and cl oses at 500 psi g ± 15 psi g. The low pressure control will open at 50 psig. The discharge temperature of R-410A is lower than R-22 due to its higher vapor heat capacity.psig °f psig °f psig °f psig °f psig °f 12; –37.7. 114discharged pressure are 40% to 70% greater than R-22 and the discharge temperature of R-410A is lower due to its higher vapor heat capacity. Never heat an R-410A cylinder over 125ºF. • The high-pressure switch will open at 610 psig (plus or minus 10 psig), and close at 500 psig (plus or minus 15 psig). The low pressure control will open-1 47.1 46.9 -18.3 49 140.6 140.1 9.4 99 314.0 313.1 37.2 149 606.4 605.5 65.0 Saturation Pressure-Temperature Data for R-410A (psig)* Forane 410A Pressure Temperature Chart Forane 410A, R-410A, Pressure Temperature Chart, PT Chart, HVAC, refrigeration, air conditioning, refrigerant gas ...Study with Quizlet and memorize flashcards containing terms like The standard design conditions for air-conditioning systems established by the air-conditioning, heating and refrigeration institute (AHRI) are, The typical temperature relationship between a standard-efficiency air-cooled condenser and the ambient temperature is, The evaporator will normally operate at a ____ degrees F boiling ...I have a 3 ton condenser. my low side pressure is 85psi/50 degree temp., high side is 415psi/156 degree temp., its r-22 system my wet bulb is 71 degrees, my air temp. at the condenser is 98 degrees,temp. is 72 degrees at the vapor line. that gives me the propper subcooling but the pressures and temps. are too high. 415psi is too high so is ...To use the HVAC Technical Support AC Pressure Temperature Chart, Turn unit on; monitor system running approximately 15 to 30 minutes. ... If it is not listed use 15 degrees of superheat as a default. Subcooling (for units with Thermostatic Expansion Valve or TXV): Compute subcooling by determining saturated condensing temperature from …The R-134a and R-1234yf pressure charts are for guidance when using A/C Pro ® recharge kits, refills, and gauges. The charts are intended to help provide an understanding of a vehicle’s air conditioning system pressure, which can be helpful during the diagnostic and recharge processes. Be sure to consult the instructions provided with your A ...The operating pressure of 410a on a 65 degree day is 185.7 psig. How to Calculate Superheat and Subcooling of 410a Systems Superheat and subcooling are two important parameters that indicate the efficiency and performance of 410a systems.R410a pressure chart high and low side. Temp(°F) Liquid Pressure (psi) Vapor Pressure (psi) -49. 5.5. 5.4. -48. 6.0.Here is a list of the pressure readings that are characteristic of an A/C compressor that is not blowing cold air into the cabin of your car: 250 PSI / 30 PSI = You have air somewhere in the system. 250 PSI / 50 PSI = The system is overcharged and the condenser is not cooling. Condenser may be blocked. 225 PSI / 80 PSI = It is likely that …When connecting gauges, connect to the always-suction port on the low side. On quite a few systems, you can get your head pressure on the liquid line, but some systems may require you to connect to the discharge line to check the head pressure. A common rule of thumb is the 100-degrees over ambient rule; the temperature of the discharge line on ...65 degree rule for R-410A central AC units? Specific Inspection Topics. Inspecting HVAC Systems. jfrederick (Joshua Frederick) July 10, 2017, 3:22pm 3. Who provided the warranty? The agent? Home Buyers Advocate - 5 Feb 17. Buying a home in Los Angeles | thehomebuyersadvocate.com. As a home buyer you want o be protected when you're buying a ...The big ones with the pressure ports you add when the systems dirty, wet, etc. Its common practice to go back and replace them after a few days. You don't have to though if the pressure drop between it is less than 2 psi on your return trip. In my earlier example the pressure drop was less than 2 psi but the thing still gave me fits.The big ones with the pressure ports you add when the systems dirty, wet, etc. Its common practice to go back and replace them after a few days. You don't have to though if the pressure drop between it is less than 2 psi on your return trip. In my earlier example the pressure drop was less than 2 psi but the thing still gave me fits.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.With this higher pressure from 410A comes a need for new tools. Let's take a look: Manifold Gauge Set - The high pressures encountered when working R-410A requires a manifold gauge set that has a low-side gauge that can read up to 500 PSIG and a high side gauge that can read up to 800 PSIG. This is significantly higher than a standard ...Still learning the trade guys. 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 …Quick Example: Let’s say that we have a 3-ton 16 SEER AC are using R-410A refrigerant and want to calculate R-410A superheat. With low side blue gauge on the suction line service port, we measured 130 psi pressure that correlates (according to R-410A PT chart) to about 45°F. The clamp-on thermometer shows that the saturated refrigerant ...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 big ones with the pressure ports you add when the systems dirty, wet, etc. Its common practice to go back and replace them after a few days. You don't have to though if the pressure drop between it is less than 2 psi on your return trip. In my earlier example the pressure drop was less than 2 psi but the thing still gave me fits.2. For best results the indoor temperature should be kept between 70°F to 80°F. Add system heat if needed. 3. At start up, or whenever charge is removed or added, the system must be operated for a minimum twenty (20) minutes to stabilize before accurate measurements can be made.Normal operating temperatures for R-410A systems typically range between 35 to 60 degrees Fahrenheit (1.7 to 15.6°C) for the evaporator coil temperature and 90 to …I have a 3 ton condenser. my low side pressure is 85psi/50 degree temp., high side is 415psi/156 degree temp., its r-22 system my wet bulb is 71 degrees, my air temp. at the condenser is 98 degrees,temp. is 72 degrees at the vapor line. that gives me the propper subcooling but the pressures and temps. are too high. 415psi is too high so is 85psi on …OPERATING PRESSURE POINTS “Systems using R-410A operate at higher pressures [than R-22],” points out the Field Diagnostics team. “For example, to produce an evaporating temperature of 40 degrees F and a condensing temperature of 115 degrees, the suction and head pressures would be 83 psia and 257 psia in an R-22 …(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.)This table represents a pressure temperature chart for R134A. R-134A is a refrigerant frequently used in automobile air conditioning. Additionally, for larger chilled water systems in commercial and industrial chilled water systems. Furthermore, R-134A is an HFC or hydrofluorocarbon refrigerant and, as noted, is used for automotive air ...The R-134a and R-1234yf pressure charts are for guidance when using A/C Pro ® recharge kits, refills, and gauges. The charts are intended to help provide an understanding of a vehicle’s air conditioning system pressure, which can be helpful during the diagnostic and recharge processes. Be sure to consult the instructions provided with your A ...When operated at a 35 degC ambient temperature, the suction pressure of an Air-Conditioner with R410A refrigerants ranges from 115 to 125 Psig. At these operating conditions, the discharge pressure is around 400 Psig. R-410A operates at 50 to 70% higher pressures than the R-22. Last updated: 19 days ago – 12 co-authors – 9 users.Temperature Pressure Chart | R-134A | R407C | R-404A | R-410A. Refrigerant Temperature Pressure Chart. The refrigerant temperature pressure chart is a tool that is readily available yet rarely used to its full advantage. It is often referred to as the "PT" Chart, or "PT" card. The PT Chart typically lists the pressure on the left, and ...The R-134a and R-1234yf pressure charts are for guidance when using A/C Pro ® recharge kits, refills, and gauges. The charts are intended to help provide an understanding of a vehicle’s air conditioning system pressure, which can be helpful during the diagnostic and recharge processes. Be sure to consult the instructions provided with your A ...On a 85 degree day: R22 - 200 roughly R410 - 300 roughly. On 2019-07-03 by Freeman. What is the normal head pressure for a 2 ton heat pump? ... I have a 3 ton 410a Lennox with correct suction pressure however my high side pressure is way low. Pressures are 120headover 118 suction low side. What would be the cause. Bad txv or tevOn 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 …Physical Properties Of R22. In parallel to using the R22 PT chart, professionals will usually need to know some of the following R22 physical properties: R22 liquid density at -69°C: 1.49 g/cm 3. R22 gas density at 15°C: 3.66 kg/m 3. Triple point temperature: -115.76K. Critical pressure: 49.36 bar. Heat capacity ratio at 86°F: 1.178253.If the pressure you are getting is down 10-15%, you probably need more refrigerant. Consult your user's manual to be sure or call Gree Electric Appliances, Inc. of Zhuhai. Second, you are looking at a heat pump. Verify the system is in cooling mode. IRstuff (Aerospace) 6 Jul 17 18:16.• R-410A Refrigerant • 0.75-1.5 Ton Single Speed. RC SERIES ENGINEERING GUIDE ... Fan power is corrected to zero external static pressure using the following equation. The nominal airflow is rated at a specific external static pressure. This effectively reduces the power consumption of the unit and increases cooling capacity but de-creases heating …However, if you're talking about completely replacing R-22 with R-410a, the answer is also probably not. R-410a has to be charged at a higher pressure than R-22. Your old system may not be suited to operating at that higher pressure. The ultimate answer would be to consult the manufacturing specs for your equipment to see if they approve R-410a ...The normal pressure for a typical R-401A mini-split ranges from 110-140 psi. However, keep in mind that the working pressure depends on factors like cooling load and weather. According to experts, the working pressure should never be less than 100 psi or more than 160 psi.R-410A differs a lot from R-22 in both chemical makeup and the tools needed to measure the pressures of R-410A. Since R-410A operates at a higher pressure and a different type of oil is used than R-22 separate gauges should be used to obtain pressures.R-134a TEMPERATURE PRESSURE CHART (Tabla de Temperaturas y Lecturas) Ambient Temperature °F / °C (Temperatura Ambiental) Low-Pressure Gauge (Puerto de Servicio del Lado de Baja Presion) High-Pressure Gauge (Puerto de Servicio del Lado de Lado de Alta Presion) 65°F (18°C) 25-35 psi / 172-241 kPa: 135-155 psi / 931-1069 kPa: 70°F (21°C) …R410A Pressure Temperature Chart R410A Temperature (°C) Pressure (barA) Pressure (barg) Pressure (psig) Pressure (barA) Pressure (barg) Pressure (psig) ... 70 47.65 46.64 676.28 47.62 46.60 675.76 The information contained within this website is for guidance only, for further system specific advice please call A-Gas directly.When operated at a 35 degC ambient temperature, the suction pressure of an Air-Conditioner with R410A refrigerants ranges from 115 to 125 Psig. At these operating conditions, the discharge pressure is around 400 Psig. R-410A operates at 50 to 70% higher pressures than the R-22. Last updated: 19 days ago - 12 co-authors - 9 users.55. Location: Covington Ga. Static pressure only lets you know there is refrigerant in the system. Low side generally 125+ for R-410A depending on outdoor temperature and load. In my opinion the best home owner test is temperature at supply grill should be about 18 degree (+ or -3 degrees) colder then room air.You want to know 410a pressures 85 degree day information? Echemi helps you to follow 410a pressures 85 degree day top topics, hotspots and trends.The picture below shows a system running on a 85°F day that had 6 ounces of R-410A added. In the picture, the manifold valve to the blue hose is closed so the blue gauge is measuring the pressure inside the running system. The vapor pressure is 118 PSIG and because it is 85°F outside, the R-410A bottle pressure is 254 PSIG. The pressure in ...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. Psig is equal to psis at sea level (14.7 psi). Psig is equal to psia - 14.7 at sea level. Psia is absolute pressure, which means it is gauge pressure + 14.7 psi.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.What should 410A pressure be at 65 degrees? 185.7 psig. The operating pressure of 410A on 65-degree day is 185.7 psig….410A PT Chart For Degrees Of Fahrenheit (°F) What should 410A pressure be at 65 degrees?55. Location: Covington Ga. Static pressure only lets you know there is refrigerant in the system. Low side generally 125+ for R-410A depending on outdoor temperature and load. In my opinion the best home owner test is temperature at supply grill should be about 18 degree (+ or -3 degrees) colder then room air.Honeywell Home Counter Day - Gastonia. Jun 11, 2024 Charlotte. A2L Training: R-32 and R454B Refrigerants. Jun 12, 2024 Asheville. A2L Training: R-32 and R454B Refrigerants. Jun 25, 2024 Greensboro. Honeywell Home Counter Day - Greensboro. Our Equipment. Manufacturers differ by region.temperature reads 115°F and the liquid. line pressure is 430 psig. 430 psig yields 122. Degree of Subcooling =. 122°F - 115°F = 7°F. Genetron AZ-20 (R-410A) pressure is about 60% (1.6 times) greater than R-22. Only use servicing equipment and components designed for AZ-20 (R-410A). • Use filter driers with service pressure rating of at ...If you want the precise amount than that is the way to do it. Check the discharge temperature of the air on the supply registers. If the temp of the air is 15-20 degrees above the return air temp that the heat pump is probably working fine. I would then check the controls and see when the back up heaters on coming on.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 ...If you see a liquid line pressure that is more than 30 degrees saturation above outdoor temperature (like a 440 PSI liquid pressure on an R410a system on a 90-degree day), do not proceed until you have further addressed the possible causes of high head, regardless of what the superheat or subcool might be reading.410a low suction pressure. I injected super seal in a 410a system that had a tiny leak that I could not find. 2 years later I come across the problem of low suction pressure normal head pressure. Replaced txv and had same problem. Replaced compressor and had the same problem. Could the super seal be clogging the txv or evaporator or condenser ...This is a chart that tells you what pressure R407C should have at -49°F to 150°F temperatures. Using an R407c pressure temperature chart you can also check what temperature a saturated R407c liquid and vapor should have at -10.4 psig to 437.5 psig pressure. R407c is an HFC refrigerant that will replace the R22 refrigerant, as per Montreal ...Operating an air conditioner for extended periods of time in low temperatures outdoors lowers the suction pressure to a velocity where the oil will not return to the compressor and will run dry. Also, under low ambient conditions "indoors" does not provide sufficient load to change refrigerant from a liquid to a 100% vapor.The Fitbit blood pressure monitor helps measure the amount of wellness in a body in multiple ways. The Fitbit tracks a day start from finish and gives recommendations to make the d...The normal pressure for a typical R-401A mini-split ranges from 110-140 psi. However, keep in mind that the working pressure depends on factors like cooling load and weather. …Rating plate charge is for systems with 15 ft. of line-set. Adjust charge 0.6 oz of refrigerant per foot of 3/8" liquid connecting tubing. Remove any refrigerant remaining in system before recharging if the system has lost complete charge, evacuate and recharge by weight. electronic thermometer to the liquid line near the outdoor coil.R-22 system would have a compression ratio of 3.02:1, while the R-410A system would have a compression ratio of 2.98:1. The actual efficiency gains from R-410A are due to its superior thermodynamic values over R-22. Under identical operating conditions the discharge temperature on a 410A system may actually be lower than on an R-22 system.Did you also check the comp. windings? With compressors, I block the airflow of the condenser to simulate a 95 degree day to get my head pressure up to 275 psig. and suction press. is 70 psig. The compressor should be pretty close to running at fla. If the suction pressure is high and the discharge pressure is low, the amps will be low.If the head pressure at the condenser is 475 psig, the condensing temperature will be if the system uses R-410A. 130°F. The low-side pressure of an air-conditioning system reads 118 psig at the evaporator. If the air-conditioning system is using R-410A as its refrigerant, what will the evaporating temperature be? 40°F. Suppose you were ...Ac service tech, llc hvac quick reference. On a 65 degree day. Web on a 50 degree day. ( f) liquid vapor ( c) ( f) liquid vapor ( c) ( f) liquid vapor ( c) ( f) liquid. Web a refrigerant temperature pressure reference chart shows pressures at various temperatures for r22, r134a, r407c, r404a, r410a, r507a.404R pressure temperature chart is quite simple to understand. This is a table that tells you precisely what the pressure of R404A is at a certain temperature. At the low end, the pressure of 404A is 0.9 psig. At the high end, the pressure of 404A is 456.8 psig. We are, of course, talking about 404A liquid pressure.. The pressure for an ordinarily operating R134a is betweeIf the outdoor ambient is below 95°F optimally you should n 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 ...Oct 12, 2023 @ 8:48 pm. When working with R-410A refrigerant systems, having the correct pressure and temperature relationship data is essential for proper troubleshooting and repair.This is where a printable 410A PT chart comes in handy. We have included a downloadable 410A PT reference sheet that provides saturated pressure values across a wide range of temperatures. The suction should be close to 65 psi and the discharge should Sep 17, 2017 · Heating mode: outside temp >65F: Run AUX only - lock out compressor (avoid high pressure) outside temp >10F and <65F: Run compressor and AUX as needed. outside temp <10F: Run AUX only - lock out compressor (avoid defrost cycling) Cooling mode: outside temp <60F: lock out compressor, run air handler fan only. Aug 9, 2009 · They recorded a 245 psi He...
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