R410a subcooling chart

By Zurum Subcooling for 410a—sounds like something straight out of a sci-fi movie, right? But it's actually a crucial process that affects your home's cooling efficiency. In this article, we'll dive into the world of subcooling, and we'll explore why it's essential for R410a refrigerant systems. So, buckle up, and let's get started!

22.4 80.8 190.2 372.5 23.2 82.4 193 377.1 20.9 77.6 184.6 363.5 21.7 79.2 187.4 368 19.4 74.5 179.1 354.6 20.1 76.1 181.8 359 17.9 71.5 173.7 345.9R-410A, or Puron, is one of the most popular refrigerants in today’s modern world. However, if you rewind just fifteen or twenty years you would find that very little people even knew about it. Most contractors and technicians worked with R-22 systems for home and commercial air conditioning. R-22 had been the standard bearer refrigerant for ...Overall Process: Enter refrigerant, temps, and pressures. The math is done for you; superheat calculations, subcooling calculations, and airflow calculations all display Target, Actual, and Difference. Repeat steps 1-2 until all HVAC Diagnostics check out as "Okay"; send system status report VIA text message or email as needed.4) Actual line temperature should = chart temperature above. 5) If more than 5 degrees over, add charge to decrease line temperature. 6) If more than 5 degrees under, remove charge to increase line temperature. 410A TXV CHARGING CALCULATOR Based on 15 degrees sub-cooling Gauge Line Gauge Line Press. Temp. Press. Temp. 221 61 376 97 …4) Actual line temperature should = chart temperature above. 5) If more than 5 degrees over, add charge to decrease line temperature. 6) If more than 5 degrees under, remove charge to increase line temperature. 410A TXV CHARGING CALCULATOR Based on 15 degrees sub-cooling Gauge Line Gauge Line Press. Temp. Press. Temp. 221 61 376 97 232 64 391 100 Oliver Wellington, HVAC Repair Expert. For a 410a refrigerant, the recommended superheat value is typically between 10°F and 12°F, while the ideal subcooling value ranges from 8°F to 12°F. However, these values can vary depending on the specific HVAC system and its requirements. The HVAC Alliance Expert team is available to help with any ...2. Check subcooling and superheat. Systems with TXV application should have a subcooling of 7 to 9 ºF and superheat of 7 to 9 ºF. a. If subcooling and superheat are low, adjust TXV to 7 to 9 ºF superheat, then check subcooling. NOTE: To adjust superheat, turn the valve stem clockwise to increase and counter clockwise to decrease. b.

View and Download York R-410A installation manual online. R-410A OUTDOOR SPLIT-SYSTEM AIR CONDITIONING 2 TO 5 TONS. R-410A air conditioner pdf manual download. Also for: 15 seer - cze, 15 seer -ac5b, 15 seer -al5b series, Cze series. Both methods are important, but subcooling is the preferred method for charging 410A systems as it provides more accurate and reliable results. Overview of 410A Refrigerant Properties and Benefits. 410A refrigerant, also known as R-410A, is a popular choice for residential air conditioning systems.The R410A PT chart can be used to answer questions like: What are normal operating pressures for 410A? What is the pressure of r410a at 72 degrees Fahrenheit? What should gauge read for 410A? You can also use the R-410A PT chart to adequately calculate the superheat, total superheat, and subcooling temperatures.This is how to check the charge on an outdoor condenser using the subcooling process. We take the Saturation temperature found on the high side of the gauge ...Many manufacturers recommend a subcooling range of 10° – 15°F, but always refer to manufacturer instructions to be sure. Just as there are two kinds of superheat, there are also two kinds of subcooling. They are condenser subcooling and total subcooling. We usually measure subcooling at the liquid line service valve.In this HVAC Training Video, I Show How to Measure the R-410A Refrigerant Charge Level Using the Subcooling Method. I Check the Charge 4 Times on an Air Cond...

to 9 ºF subcooling at the indoor unit. 5. Maximum equivalent length of line set is: - 250 feet for single stage units with scroll compressors. - 200 feet for two stage units with scroll compressors 6. Maximum linear length of line set is: - 200 feet for single stage units with scroll compressors. Subcooling Charging Chart. Charge your refrigeration system accurately with the help of our subcooling charging chart, tailored for different refrigerants and conditions… Subcooling Charging Chart: A Homeowner’s Guide to a More Efficient HVAC System. Subcooling for 410a. Master the art of managing subcooling for 410a refrigerant systems. Apr 25, 2017 · Fix your HVAC orifice with a fixed orifice metering device. We'll identify different superheat chart measuring systems like the R22 superheat chart or the R410a charging chart. We'll also explain how the 410a charging chart can help you fix your HVAC. Discover how to fix your HVAC orifice issues with HVAC Brain. 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 ... This video is to help new technicians learn the basics of checking the charge on an air conditioner. The EPA requires all persons handling refrigerant to be...

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... 410A Service Techi..> 2007-01-16 02:22 87K R410A Charging Chart..> 2007-01-16 02:22 90K R410A Instructors Ma..> 2007-01-16 02:25 1.2M Refer dwg.pdf 2007-01 ...(from PT chart). •Amount is determined by indoor wet-bulb and indoor & outdoor dry-bulb temperatures. •Can be as low as 5⁰F & as high as 40⁰F depending on ambient conditions. System Super HeatStep 3 – subtract required subcooling (Step 1) from converted temperature (Step2) – This is the required liquid line temperature. Step 4 – Measure liquid line temperature. If the measured liquid line temperature does not equal the required liquid line temperature: Superheat Charging Chart - Cooling - non-TXV - R410A & R22Subcooling Chart 410a: The Ultimate Guide for Homeowners By Chimjim Gabriel-Odimba Subcooling chart 410a: ever heard of it? Don't worry, we've got you covered! In this comprehensive guide, we'll explain everything you need to know as a homeowner about subcooling and the 410a refrigerant. Table of Contents Understanding the Basics of Subcooling

410a Subcooling Calculator: Understanding the Basics. Introduction to Subcooling; Refrigerants: 410a and 404a. Properties of 410a Refrigerant; Properties of 404a …What should my Subcooling and Superheat be? For subcooling a ballpark range may be somewhere inbetween 10-15 degrees F. For superheat it could be 12-20 degrees F. Check with the manufacturer though. Many units have a charging chart, behind the name plate on the condensing unit, use this first.How to Use a Two-Column Pressure-Temperature Chart Properties of the new zeotropic refrigerant blends are different than traditional refrigerants, it is useful to know how to read a two-column PT chart. Traditional PT charts list the saturated refrigerant pressure, in psig, with a column for temperature down the left side. Single-component refrigerants and …The R410A PT chart can be used to answer questions like: What are normal operating pressures for 410A? What is the pressure of r410a at 72 degrees Fahrenheit? What should gauge read for 410A? You can also use the R-410A PT chart to adequately calculate the superheat, total superheat, … See more22.4 80.8 190.2 372.5 23.2 82.4 193 377.1 20.9 77.6 184.6 363.5 21.7 79.2 187.4 368 19.4 74.5 179.1 354.6 20.1 76.1 181.8 359 17.9 71.5 173.7 345.9This P/E chart shows R410a at 100°F saturated condensing temp, 10°F SC, 40°F saturated suction temp, 20°F SH at the compressor. ... the saturation zone is a latent (change of state) process. Everything that occurs to the right (superheating) and left (subcooling) is a sensible process. Go to the movies in your mind. Imagine that you are …SPANISH / ENGLISH CHARGE CHART 7-12-12 JHB A-1079S000 115 105 95 82 75 55 115 105 95 82 75 55 ... •It is required to fine tune unit charge using the subcooling method. Ind oor ambient temperature must be between 70°F …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. if "x" is below ambient temperature line, add charge and repeat step 3.Calculate superheat R410a Superheat charts (Cooling, NON-TXV) Instructions Measure wet bulb temperature with a sling psychrometer or a temperature and humidity thermistor. Use a digital thermometer for all temperature measurements. Do NOT use mercury or dial type thermometers.Nov 2, 2003 · Superheat and subcooling calculations can be calculated the same way we have always done with R-22 refrigerant. The only difference will be the higher pressure-temperature relationship when reading the temperature-pressure chart. The temperature glide for R-410A is only 0.3 degrees F and can be ignored, and fractionation is not a concern. Calculate. This free online tool allows HVAC professionals to quickly calculate Superheat and Subcooling measurements for both R22 & R410A refrigerants.

2. Check subcooling and superheat. Systems with TXV application should have a subcooling of 7 to 9 ºF and superheat of 7 to 9 ºF. a. If subcooling and superheat are low, adjust TXV to 7 to 9 ºF superheat, then check subcooling. NOTE: To adjust superheat, turn the valve stem clockwise to increase and counter clockwise to decrease. b.

The pressure needle intersects at 100°F saturated temperature for R-410A. Therefore, the saturated temperature inside the condenser coil is 100°F. Below is the example: Calculate the subcooling based on the picture: Sat Temp - Actual Line Temp= Subcooling. 100°F - 95°F = 5°F of Subcooling.Subcooling Calculator. Loading Tool... You must identify your local store and sign in to see local price and availability information and place orders. Johnstone Supply is a leading wholesale distributor for HVACR equipment, parts and supplies available and in-stock at local branches.Feb 2011. Location. Peoria, IL. Posts. 3,002. Post Likes. i put in ruud, my chart is the same setup, but it also list designed subcool temp at 95 degrees outside (half of them do, all new units) just not sure how outside temp effects there projected sub-cool design at 95 degrees say if it 75, 82 etc... i charge by weight, and mostly the charge ...In this HVAC Training Video, I Show 7 Scenarios on How to Measure the Subcooling on R-410A Air Conditioners! These are used as Practice Examples for Learning...Pressure chart for all temperatures of the R-410A refrigerant. Diagnose problems for your Puron appliance with our complete Pressure Table.Determining the Proper Subcooling Level for R410a. Getting the right subcooling level for R410a is crucial. Factors like system design, ambient conditions, and equipment type influence subcooling requirements. Typically, R410a systems require a subcooling level of 10-15°F (5-8°C). In this HVAC Training Video, I Show How to Check the Refrigerant Charge using the Subcooling Method. Next I provide 3 Scenarios for Technicians to figure out... compressor ZP42 (R410A) has been analyzed. 2 3 Pure Compressor Analysis: 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 solutions to feature ...Conditions: 43.3 °C (110 °F) condenser/7.2 °C (45 °F) evaporator/2.8 °C (5 °F) of subcooling/8.3 °C (15 °F) of superheat. Freon™ 407C and 410A Refrigerants 4 Table 3. General Property Information: Freon™ 407C, Freon™ 410A, and HCFC-22 Property Unit Freon™ 407C (R-407C) Freon™ 410A

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In the world of business, there’s a slew of reasons why you may need an org chart. But while you can use different types of presentation software or specialty applications to create them, you might not have these at your disposal.system) or subcooling (charts vary dramatically from one system to another), you will typically need three things. Outdoor dry bulb (outdoor air temper-ature), indoor wet bulb, and the manufacturers tar-get superheat chart or subcooling chart. You can use the ARH4 Fieldpiece acessory head for both indoor wet bulb and outdoor dry bulb. OrSUPERHEAT METHOD. 1. Take the suction line pressure and temperature at the condenser's suction service valve (air conditioning) or service port at the compressor (heat pump). If you use a probe-type thermometer, put a piece of pipe insulation around the probe and pipe. 2.to 9 ºF subcooling at the indoor unit. 5. Maximum equivalent length of line set is: - 250 feet for single stage units with scroll compressors. - 200 feet for two stage units with scroll compressors 6. Maximum linear length of line set is: - 200 feet for single stage units with scroll compressors. Jan 1, 2007 · Frequently bought together. This item: R410a Superheat Subcooling Calculator Charging Chart. $1095. +. R22 Superheat Subcooling Calculator Charging Chart. $1095. +. AC Service Tech, LLC HVAC Quick Reference Cards for Refrigerant Charging and Troubleshooting. $2499. • R-410A systems operate at approximately 60% higher pressures (1 6 times) than R-22 systems Do not use R-22 service equipment or components on R-410A equipment Use appropriate care when using this refrigerant Failure to exercise care may result in equipment damage or personal injury13 SEER - AIR CONDITIONER CHARGING CHART / CARTA DE CARGA DEL ACONDICIONADOR DE AIRE - SEER 13 ESTA UNIDAD CONTIENE REFRIGERANTE DE R-410A. NO LA CARGUE CON REFRIGERANTE R-22. Si las tuberías de refrigerante utilizan longitud extendida, agregue 27.6kpa (4PSI) alos valores líquidos de lapresión de lliquido que semuestran en la tabla. Target subcooling is lower than measured subcooling (high subcooling situation). Example: In an R-410A system, we have a 10°F target subcooling (specified on the rating plate), but our measured subcooling is 18°F. In this case, we usually have to remove the R-410A refrigerant (recover the freon).Are you looking for... hvac for sale locally on eBay Classfieds? LX1036PB R410A R22 R404a AC Manifold Gauges 36" Hoses. … R 410A Superheat Subcooling Calculator Charging Chart N. . Do not mix R-410A Mac Make Up Charts Downloadable - We show saturation pressure of gas versus the temperature of Eztrieve Plus Summary Report. …Calculate. This free online tool allows HVAC professionals to quickly calculate Superheat and Subcooling measurements for both R22 & R410A refrigerants. In this HVAC Training Video, I Show 7 Scenarios on How to Measure the Subcooling on R-410A Air Conditioners! These are used as Practice Examples for Learning... ….

The R410A PT chart can be used to answer questions like: What are normal operating pressures for 410A? What is the pressure of r410a at 72 degrees Fahrenheit? What should gauge read for 410A? You can also use the R-410A PT chart to adequately calculate the superheat, total superheat, and subcooling temperatures.jsherrill77 · #7 · Dec 23, 2008. Okay, since this is a TXV system you must check charge by subcooling method and not superheat. It's really not to difficult to do. First you hook up your gauges. let system run for 15 minutes. If your gauges also show different refrigerants you won't even need a pressure/temp chart.R-410A refrigerant took over R-22, which was banned in 2010 and phased out in 2015. R-32 is an even more efficient refrigerant for your HVAC system. R-410A is chlorine-free but still releases enough chemicals to have a high global warming potential. It costs between $3,200 to $6,800 on average to install an R-410A HVAC system.Are you looking for... hvac for sale locally on eBay Classfieds? LX1036PB R410A R22 R404a AC Manifold Gauges 36" Hoses. … R 410A Superheat Subcooling Calculator Charging Chart N. . Do not mix R-410A Mac Make Up Charts Downloadable - We show saturation pressure of gas versus the temperature of Eztrieve Plus Summary Report. …The Medicare retirement age chart is an important tool for understanding when you can start receiving Medicare benefits. It is important to understand the rules and regulations surrounding the age at which you can begin receiving benefits, ...Since subcooling refers to a liquid and is defined as any sensible heat lost after the saturated liquid point in the condenser, the condenser subcooling would be 11°F (85°F – 74°F), where 74°F is the condenser outlet temperature and 85°F is the saturated liquid (bubble point) temperature corresponding to the 180 psig head (condensing ...Because Freon™ 407C and Freon™ 410A are mixtures of HFCs, they have zero ODP. Table 1 lists the chemical names and formulae of the components that make up Freon™ 407C and Freon™ 410A. Table 1. Components of Freon™ 407C: HFC-32/HFC-125/HFC-134a and Freon™ 410A: HFC-32/HFC-125 Component Chemical Name Formula CAS Number Molecular Weightcharged to 7 to 9 ºF subcooling at the indoor unit. 7. Maximum equivalent length of line set is: a. 250 feet (76.2 m) for single stage units with scroll or reciprocating compressors. b. 150 feet (45.7 m) for single stage units with rotary compressors. c. 150 feet (45.7 m) for two stage units. 8. Maximum linear length of line set is: a.This is a STEP BY STEP PROCESS on How to Check an R-410a Refrigerant Charge on an Outdoor Air Conditioning Unit with 3 Position Service Valves otherwise know...605.5. 150. 613.9. 613.0. R410 Temperature/pressure chart for low/high side. psi: Pound per square inch, unit of pressure. The temperature pressure charts in HVAC help in troubleshooting various problems with air conditioning systems such the the head and suction pressure, liquid lines and troubleshooting superheat and subcooling. R410a subcooling chart, General Wire Spring/General Pipe Cleaners. Liberty Pumps. SFA Saniflo Inc. For example only. , R134a Pressure Gauge Chart. This chart details how ambient temperature correlates with the system refrigerant charge pressure, and how it affects high and low side psi readings. It can be used for recharging refrigerant, or to diagnose an a/c system based on pressure readings from your gauges. Ambient Temperature (°F), Getting the right subcooling level for R410a is crucial. Factors like system design, ambient conditions, and equipment type influence subcooling requirements. Typically, R410a …, The pressure needle intersects at 100°F saturated temperature for R-410A. Therefore, the saturated temperature inside the condenser coil is 100°F. Below is the example: Calculate the subcooling based on the picture: Sat Temp - Actual Line Temp= Subcooling. 100°F - 95°F = 5°F of Subcooling., 2. Check subcooling and superheat. Systems with TXV application should have a subcooling of 7 to 9 ºF and superheat of 7 to 9 ºF. a. If subcooling and superheat are low, adjust TXV to 7 to 9 ºF superheat, then check subcooling. NOTE: To adjust superheat, turn the valve stem clockwise to increase and counter clockwise to decrease. b., Download scientific diagram | Comparison of predicted R-410A subcooling-quality trends with ambient for implicit TXV model vs. short-tube orifice and ..., May 18, 2017 · (from PT chart). •Amount is determined by indoor wet-bulb and indoor & outdoor dry-bulb temperatures. •Can be as low as 5⁰F & as high as 40⁰F depending on ambient conditions. System Super Heat , Calculating superheat: Measure the low-side pressure with your gauge. Convert pressure to temperature with an app, slide or chart. Next, take the temperature of the suction line where it leaves the …, Sub-cooling should be 9 oF (+ or - 2°F) Add charge to raise subcooling. Recover charge to lower subcooling. Temperature Probe Test Point Locations LIQUID LINE SERVICE VALVE (Smaller of the two copper lines) INSULATE THE PROBE FOR A MORE ACCURATE READING, Subcooling is the amount of liquid held back in the condenser. This allows the liquid to give up more heat, below saturated pressure- temperature. For every one degree of subcooling at the same condensing+ pressure, capacity will increase .5 percent. See the chart that I developed for HVACPro app., See full list on learnmetrics.com , to 9 ºF subcooling at the indoor unit. 5. Maximum equivalent length of line set is: - 250 feet for single stage units with scroll compressors. - 200 feet for two stage units with scroll compressors 6. Maximum linear length of line set is: - 200 feet for single stage units with scroll compressors. , It is a clear, colorless, non-toxic and non-irritating liquid. R-410A is a 50:50 blend of R-32 and R-125. The boiling point at atmospheric pressure is -62.9°F. A few of the important principles that make the refrigeration cycle possible are: heat always flows from a warmer to a cooler body., Air Conditioner York R410A User Manual (28 pages) ... 66901 / 035-20393-001 Rev. C (1204) TABLE 2: 15Z24AC Subcooling Charging Chart TABLE 4: 15Z48AC Subcooling Charging Chart Indoor Wet Bulb (°F) Indoor Wet Bulb (°F) Outdoor Outdoor Ambient Ambient DB (°F) Liquid Pressure (psig) at Base Valve DB (°F) Liquid Pressure ..., R410a Superheat charts (Cooling, NON-TXV) Instructions * 1 2 3 Measure wet bulb temperature with a sling psychrometer or a temperature and humidity thermistor. Use a digital thermometer for all temperature measurements. Do NOT use mercury or dial type thermometers. Allow the unit to operate (high cool for multistage units) for 15 minutes before , SUPERHEAT METHOD. 1. Take the suction line pressure and temperature at the condenser's suction service valve (air conditioning) or service port at the compressor (heat pump). If you use a probe-type thermometer, put a piece of pipe insulation around the probe and pipe. 2. , SYSTEM CHARGE CHART HEATING 4.0 TON HEAT PUMP OUTDOOR AMBIENT (°F DB) INDOOR AMBIENT (°F DB) SYSTEM CHARGE CHART COOLING LIQUID PRESSURE - PSIG LIQUID PRESSURE - PSIG Instructions: 1. Connect low pressure gauge hose to common suction port located to the left of service valves to measure suction pressure. Do Not connect low pressure gauge hose ..., To determine the Target Superheat for an air conditioning system with a fixed orifice (such as a piston or capillary tube) measure the indoor WB (wet bulb) temperature with a digital psychrometer and the outdoor DB (dry bulb) temperature with a standard digital temperature reader. Input these temperatures in a superheat chart, calculation, app, or digital manifold set in order to determine the ..., Step 3. Subtract the evaporator saturation temperature from the thermocouple temperature. This difference is the system superheat. This shows the temperature rise above the bubble point temperature of the system. Review the operating specifications for your system to determine the proper superheat. Inadequate superheat can cause liquid ... , 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 refrigerant temperatures and pressures call the Advantage Service Department at 317-887-0729. Download the PDF document., to 9 ºF subcooling at the indoor unit. 5. Maximum equivalent length of line set is: - 250 feet for single stage units with scroll compressors. - 200 feet for two stage units with scroll compressors 6. Maximum linear length of line set is: - 200 feet for single stage units with scroll compressors., It is a clear, colorless, non-toxic and non-irritating liquid. R-410A is a 50:50 blend of R-32 and R-125. The boiling point at atmospheric pressure is -62.9°F. A few of the important principles that make the refrigeration cycle possible …, R22 Pressure-Temperature Chart-49-45: 1-17.2 51: 10.6 101: 38.3-48-44.4 2-16.7 52; 11.1 102; 38.9-47-43.9 3-16.1 53; 11.7 103; 39.4-46-43.3 4-15.6 54; 12.2 104; 40-45-42.8 5-15 55; 12.8 105; 40.6-44-42.2 6-14.4 56; 13.3 106; 41.1-43-41.7 7-13.9 57; 13.9 107; 41.7-42-41.1 8-13.3 58; 14.4 108; 42.2-41-40.6 9-12.8 59; 15 109; 42.8-40-40 10-12.2 60 ..., 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. if "x" is below ambient temperature line, add charge and repeat step 3., Nov 2, 2003 · Superheat and subcooling calculations can be calculated the same way we have always done with R-22 refrigerant. The only difference will be the higher pressure-temperature relationship when reading the temperature-pressure chart. The temperature glide for R-410A is only 0.3 degrees F and can be ignored, and fractionation is not a concern. , Step 3 – subtract required subcooling (Step 1) from converted temperature (Step2) – This is the required liquid line temperature. Step 4 – Measure liquid line temperature. If the measured liquid line temperature does not equal the required liquid line temperature: Superheat Charging Chart - Cooling - non-TXV - R410A & R22, charged to 7 to 9 ºF subcooling at the indoor unit. 7. Maximum equivalent length of line set is: a. 250 feet (76.2 m) for single stage units with scroll or reciprocating compressors. b. 150 feet (45.7 m) for single stage units with rotary compressors. c. 150 feet (45.7 m) for two stage units. 8. Maximum linear length of line set is: a., Pressure chart for all temperatures of the R-410A refrigerant. Diagnose problems for your Puron appliance with our complete Pressure Table., Think 42-48 degrees, R22 or R410. Bryant/Carrier 410a systems with a TXV have a subcooling of 8 to 16. Check the data plate or the table inside the cover for the subcooling for the specific model/tonnage. Make sure airflow is right, charge fixed orifice by superheat, TXV by subcooling., Aquí nos gustaría mostrarte una descripción, pero el sitio web que estás mirando no lo permite., Many manufacturers recommend a subcooling range of 10° – 15°F, but always refer to manufacturer instructions to be sure. Just as there are two kinds of superheat, there are also two kinds of subcooling. They are condenser subcooling and total subcooling. We usually measure subcooling at the liquid line service valve., You are looking for roughly 400 CFM per 12,000 BTU/HR of capacity but 350 to 425 CFM will still work. If you have an available liquid port inside the outdoor unit, you can check subcooling. If the subcooling is very low such as 1°F or 2°F, the system is low on refrigerant if you are running at full capacity cooling mode., They will use various pieces of information like the outdoor temperature, target superheats or subcooling, and actual superheat or subcooling to determine the correct charge, and more info. Unfortunately, there’s no one-size-fits-all charging chart for Goodman air conditioners because the required refrigerant charge will depend on the specific model …