Frontier Airlines increased its offer for Spirit Airlines on Friday, a week before Spirit shareholders vote on whether to approve the proposed merger between low-cost carriers. Fro...Low refrigerant levels, an overcharge of refrigerant, leaks, condenser obstructions, a clogged air filter, and a faulty fan motor can all cause high head pressure or low suction pressure. Once the HVAC technician correctly diagnoses the problem, they will repair the problem and supply a refrigerant charge if necessary.Jun 7, 2013 · Fan not running. System overcharged with refrigerant. Clean walk-in cooler and walk-in freezer condenser coils. Check fan motor and its electrical circuit. Reclaim excess refrigerant. Low discharge pressure. Insufficient refrigerant in system. Low suction pressure. Check for leaks; repair and add charge. Low refrigerant levels, an overcharge of refrigerant, leaks, condenser obstructions, a clogged air filter, and a faulty fan motor can all cause high head pressure or low suction pressure. Once the HVAC technician correctly diagnoses the problem, they will repair the problem and supply a refrigerant charge if necessary.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. It ran for about 15 minutes. I added a little freon and the high side shot up to 425.First, we must be aware that a restriction exists in the first place. In the case of the most common liquid line restrictions on HVAC equipment (with no receiver), we will see low suction pressure, high superheat, and normal to high subcooling. (Note: high head pressure isn't typically an indicator of a restriction!) In those cases, we know ...That’s because the compressor requires refrigerant of a specific density to pump refrigerant into the high side of the system; when the suction pressure is low, the …That is correct the outdoor check valve should be all the way open, but if it were partially closed or partially open, as you stated, --"it would result in a partial liquid line restriction," resulting in LOW suction pressure, somewhat HIGH head-pressure, also somewhat High super-heat, and HIGH sub-cooling, with usually low compressor amp-draw.Low wedge sandals are a great way to add a touch of style and comfort to any outfit. Whether you’re headed to the office, out for a night on the town, or just running errands, thes...Blue --> "True Suction" Low Pressure; Red --> High Pressure (either refrigerant line) Place an insulated temperature probe on the liquid line between the evaporator coil & O/D expansion valve. Allow the unit to run for at least 10 minutes. Monitor pressures and temperature as the system operates.What could be the causes off a system with high suction pressure and low head pressure? R22 Head: 215 Suction:90 Suction line temp: 65 Liquid line temp 80 Outside temp 82 Indoor temp 77 Recip Compressor amp 6.6/7.3 RLA Any response would be greatly appreciated! Reply . 07-10-2012, 09:00 PM #2.If the pot were closed, the water would reach higher pressure before it boils. Conversely, if the pressure were reduced (vacuum), water would boil at a lower temperature. It will boil at room temperature, if the absolute pressure is less than approximately 0.4 psia. Water has low vapor pressure, but other substances may have …Very high suctuion and head pressure on heating mode. Hello, I have a Rheem (2015) heat pump 2ton 410A, on cooling mode the system runs great; suction and liquid pressure are ok 185/360, super heat 10 F, with 90F outdoor temperature, now the winter is coming and the system on heating mode the gages read high pressure on both …If a system is running a head pressure of 235 psig and a suction pressure of 10 psig, the compression ratio would be: (235 + 15) psia ÷ (10 + 15) psia = 250 psia ÷ 25 psia = 10 to 1 or 10:1. A compression ratio of 10:1 simply means that the high-side pressure is 10 times greater than the low-side pressure. The higher the compression ratio ...Blue --> "True Suction" Low Pressure; Red --> High Pressure (either refrigerant line) Place an insulated temperature probe on the liquid line between the evaporator coil & O/D expansion valve. Allow the unit to run for at least 10 minutes. Monitor pressures and temperature as the system operates.First, with a flow rate of less than 1,000 gallons per minute (gpm), less head loss would occur in the suction pipeline, resulting in a higher pressure at the pump suction pressure gauge that was not observed. Second, the pump curve for the 14.125-inch impeller shows that the pump's shutoff head is 212 feet, a 16-foot head increase …Blue --> "True Suction" Low Pressure; Red --> High Pressure (either refrigerant line) Place an insulated temperature probe on the liquid line between the evaporator coil & O/D expansion valve. Allow the unit to run for at least 10 minutes. Monitor pressures and temperature as the system operates.The most common causes of pressure in the head and face include allergies, ear infections, the common cold, muscle tension, sinusitis, stress and tension headaches. Increased intra...High suction pressure simply means the refrigerant’s PSI is higher than normal within the suction line. Problems Caused By High Suction Pressure. With high …When the device overfeeds, there are high chances for both the suction pressure and the discharge pressure to increase. 3. Reduced airflow through the evaporator. One of the most common reasons for low superheat is due to reduced airflow. With reduced airflow, there isn’t enough warm air to vaporize the refrigerant.Jun 29, 2009 · I just wanted to pick every ones brain i could. I am working on trane condensor and have high head pressure and low suction pressure. It was 90+ out today and I dumped r-22 into the system and no matter what I did I could not get the suction line to sweat and the superheat never dropped below about 20 degrees. my head pressure was around 285 ... 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 …404a pressures in low. I have a r-404a roof-top condensing serving a walk in freezer. pressures are 235 psi head pressure and a 28psi suction pressure. Outdoor ambient is 30degress and indoor box temperature is about 20degrees. System has a head pressure control on roof for hot gas. Wondering if pressures sound right.This will cause symptoms of low suction pressures, high evaporator and compressor superheats, normal to a bit high condenser subcooling, high compressor discharge temperatures, low compressor amp draws, low head pressures, and low condenser splits. Often, the system will cycle on the low-pressure control.Came across another Rheem recently with a high head pressure in heat mode. Its a RPPL. Head pressure slowly climbs to above 600, suction pressure is normal not low at all. Airflow inside is okay... static pressure is .7inWc. Coils are clean. In cooling mode the charge looks damn near perfect... 11 degrees subcooling and 9-11 degrees superheat. Scroll Troubleshooting Solution Chart - Copeland A/C Specific. Deep Vacuum Conditions. Deep vacuum can cause arcing damage to the Fusite pins. Models built after September 1991 have an internal vacuum protection and stop pumping when the pressure exceeds approximate. 10:1. Scroll compressors should never be used to evacuate a system, …If a high head pressure is detected, you will need to call your local professionally licensed air conditioning service team. What Determines High Head Pressure. A 410A system who have 400-418 PSIG on the high side, while the lower side is 120-130 PSI. If it is more than this, it is considered high.Low head pressure may occur simulataneously with high pressure on the suction side of an air conditioner, heat pump or refrigeration system compressor system. If the system is …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. 3. Typical high side pressure for R410A is < 600 psi at an ambient outdoor temperature of 95 °F, may vary by equipment. 4.High discharge temperatures can indicate minimal movement of refrigerant. Because the refrigerant isn't being pumped at design rates it stays in the condenser for a longer period of time and is cooled more, hence lower head pressures, and in turn, if the compressor is not pumping well, you will see elevated suction pressures. Reply.Permissible pump suction head or static suction head (h s) is the only parameter concerning cavitation which the purchaser of a pump can normally influence. To ensure cavitation-free operation the pump should be installed so that: Figure 3.62a. which is the same condition as expressed in equation 3.61d. When both sides of the equation are …Low condenser airflow will show up as high head pressure, normal suction line pressure, normal superheat, and normal to high sub-cooling See details at SUPERHEAT DEFINITION Air flow across the cooling coil: blocked air flow in the air handler, causing the TXV and its temp sensor to remain closed Check valve inoperative There are three main reasons why a reciprocating compressor will simultaneously have a low head pressure and a high suction pressure. • Bad (leaky) compressor valves; • Worn compressor piston rings; and • Leaky oil separator return line. LEAKY COMPRESSOR VALVES 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 …Suction Head. Based on the Energy Equation - the suction head in the fluid close to the impeller *) can be expressed as the sum of the static and velocity head: h s = p s / γ liquid + v s 2 / 2 g (1) where. h s = suction head close to the impeller (m, in) p s = static pressure in the fluid close to the impeller (Pa (N/m 2), psi (lb/in 2)) Aug 29, 2013 · Low flow (head too high)— A low-flow condition usually indicates a restricted line. If the restriction is in the suction line, cavitation will likely occur. Otherwise, the restriction is probably in the discharge line. Other possibilities are that the suction static head is too low or that the discharge static head is too high. For example, a ... Although cryptos enjoyed strong performances earlier, a lack of fundamental catalysts may apply some pressure on the sector. The fiat alternative narrative isn’t quite panning out ...At room temperature, it will boil if the absolute pressure is less than about 0.4-psia. Water has low vapor pressure; other substances may have high values and, while numerically different, work similarly. Consider three examples of a tank providing different suction heads as a function of the tank pressure: Figure 3a. Tank open to …May 31, 2006 · Both fans working fine. Good air flow through evaporator and condenser. There are no leaks, and no icing. I have tried adjusting the charge to raise the low side pressure, but in doing so would also raise the high side exponentially. (i.e. Increase the suction pressure by 20 psi, and the head pressure would jump as much as 150 psi) When it comes to building a deck, there are many options available. One of the most popular places to shop for decking boards is at Lowes. Lowes has a wide selection of decking boa...Description: HHL-Flomax (High Head Low Flow) "HR" high pressure self-priming centrifugal pumps meet USCG specifications for auxiliary fire control. The high suction centerline and impeller design eliminates premature priming loss while ensuring consistent priming Discharge Size: 1.5 inch; Maximum Discharge Flow: 108 to 180 GPM; Power …Mar 24, 2023 · In addition to a malfunctioning TXV, other factors that can cause high subcooling include a dirty condenser coil or restricted airflow over the condenser. Low Suction pressure/ low head pressure. A bad TXV can also cause low suction pressure and low head pressure in an HVAC system by restricting the flow of refrigerant into the evaporator coil. Other signs to look for include high head pressure, low suction pressure, and a high temperature difference between the suction and discharge lines. These symptoms may indicate a problem with the system’s balance and should be addressed promptly to avoid further issues. Diagnosing Low Subcooling and High SuperheatThis amount of required pressure differential will vary a bit based on the valve. Usually, we want to see a 100 PSI minimum difference between the liquid line pressure and the desired evaporator pressure. If the head pressure drops too low due to low ambient conditions, this can come into play and impact the ability of the valve to do …Jan 9, 2017 · This will cause the following symptoms: Low evaporator (suction) pressure; High evaporator and compressor superheats; Low compressor amp draw; Short-cycling on the low-pressure control; Somewhat high discharge temperature; Low condensing (head) pressure; Low condenser split; and. Sep 4, 2017 · Refrigeration service technicians often run service calls in which they find a compressor with a higher-than-normal suction pressure along with a lower-than-normal head pressure. Many times, the refrigeration equipment is still running, but the product temperature is too warm, which causes product quality and safety to suffer. LOW-FLOW HIGH-HEAD PUMPS FOR OIL & GAS AND PETROCHEMICAL MARKETS TRILL IUMFLOW.COM. ... MAXI MUM HEAD MAXI MUM SUCTION PRESSURE 150 gpm 1,500 ft 200 psig 180°F 250°F 4,858 rpm 4,858 rpm 75 hp 460 m 14 barg 82°C 121°C 55 kW 450 gpm 5,200 ft 300 psig 250°F 550°F 400 hp 1,585 m 21 barg 121°CTry our Net positive suction head calculator or: In your reservoir, get fluid surface pressure: P surface. Get the distance between the pump and liquid surface: Z.If the tank is above the pump, multiply this value by -1.; Obtain the vapor pressure for the system's temperature: P vapor.Also, its density is ρ.Note g represents gravity.; Calculate …r410a high/low pressures Residential 410a system as follows: Liquid line: ~400psi ~ 30 subcool ... What would be the best way to determine the problem? If it weren't for the high head pressure and the high SH and SC I'd leave it alone. THX Jim Reply . 06-07-2021, 05:45 ... Suction Pressure: 105 lbs. Suction Line Temp: 65º F ...So we replace the compressor (same model #), replace the liquid line filter dryer, and evacuate to 500 microns. I weigh the charge in per the manual = unit's orignal charge + addl ounces per foot of lineset - total of 5# 6 oz. Start unit up, damn it, looks wrong immediatelY: Suction: 149.5 psi. Suction Temp: 55.4*F.May 16, 2002 · 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 system, while they would be 133 and 406 psia, respectively, in an R-410A ... Connect the module at the suction line service port. Close the compressor off from the low side of the system by front seating the suction service valve. Run the compressor for two minutes. Turn off the compressor and observe the reading. The compressor should have pulled down to at least 15 inches of Hg.What are the causes of high head pressure? - Overcharging of the refrigerant in the system. - Operating the system at high range than the specified limit. - Malfunctioning of the condenser fan motor. - The system is charged with the impurities of non condensing gases. - The condenser coil is not cleaned well.Aug 28, 2012 · High suction low head, with 100 lb suc and 100 degree ambient your head should be quite a bit higher. Really need the amp draw of comp and rated RLA but appears to be a compressor issue. Im thinking maybe dirty evap i vacuumed rust from drain pain really old unit. I can just about guarantee that thinking is wrong. At room temperature, it will boil if the absolute pressure is less than about 0.4-psia. Water has low vapor pressure; other substances may have high values and, while numerically different, work similarly. Consider three examples of a tank providing different suction heads as a function of the tank pressure: Figure 3a. Tank open to …Hi, High head and a low suction pressure can indicate a couple of different things. One, condenser coil very dirty and needs to be washed very well. This will bring your head pressure down but let it run back up to normal engine temperatures. If the head is ok after you clean it, and suction is even lower, you may still be low on charge.Hi, I'm having problems with a 3t HP. My suction is running at 45psi and head is at 110psi. I checked evap coil and filter and both were clean, so I figured it was low on R22. I added 7 lbs. (factory charge is 7.25 lbs) and pressures did not change. The suction line is frosting up to the compressor. I'm starting to think I have a bad reversing ...So we replace the compressor (same model #), replace the liquid line filter dryer, and evacuate to 500 microns. I weigh the charge in per the manual = unit's orignal charge + addl ounces per foot of lineset - total of 5# 6 oz. Start unit up, damn it, looks wrong immediatelY: Suction: 149.5 psi. Suction Temp: 55.4*F.Most HVAC systems are designed for a maximum outdoor ambient temperature of 95° F. So, if the temperature is at or above 95° with high humidity, then you will likely also experience high head pressures. Or at least above normal head pressure for the air conditioner or heat pump. The system is working hard to remove not only the …At room temperature, it will boil if the absolute pressure is less than about 0.4-psia. Water has low vapor pressure; other substances may have high values and, while numerically different, work similarly. Consider three examples of a tank providing different suction heads as a function of the tank pressure: Figure 3a. Tank open to …Posted: 7/6/2012 1:35:12 PM EST. My HVAC contractor recently saw head pressure of 350-400, normal to low suction. He diagnosed it as a restriction in the condensor coil, replaced condensing unit. The "changeout team" that installed the condenser saw exactly the same situation on the new unit. They left and now waiting for a re-evaluation from ...First, with a flow rate of less than 1,000 gallons per minute (gpm), less head loss would occur in the suction pipeline, resulting in a higher pressure at the pump suction pressure gauge that was not observed. Second, the pump curve for the 14.125-inch impeller shows that the pump's shutoff head is 212 feet, a 16-foot head increase …As a ballpark & it depends on a lot of factors, suction should be in the range of 60 to 80 & head should be in the range of 150 to 300. I've got a 2.5 ton heatpump, @ 90 degrees in heat mode the suction should be @ 74 and the head should be @ 255. Reply. 05-28-2005, 08:33 PM #6. david2641.First, with a flow rate of less than 1,000 gallons per minute (gpm), less head loss would occur in the suction pipeline, resulting in a higher pressure at the pump suction pressure gauge that was not observed. Second, the pump curve for the 14.125-inch impeller shows that the pump's shutoff head is 212 feet, a 16-foot head increase …Jul 19, 2005 · That is correct the outdoor check valve should be all the way open, but if it were partially closed or partially open, as you stated, --"it would result in a partial liquid line restriction," resulting in LOW suction pressure, somewhat HIGH head-pressure, also somewhat High super-heat, and HIGH sub-cooling, with usually low compressor amp-draw. LOW-FLOW HIGH-HEAD PUMPS FOR OIL & GAS AND PETROCHEMICAL MARKETS TRILL IUMFLOW.COM. ... MAXI MUM HEAD MAXI MUM SUCTION PRESSURE 150 gpm 1,500 ft 200 psig 180°F 250°F 4,858 rpm 4,858 rpm 75 hp 460 m 14 barg 82°C 121°C 55 kW 450 gpm 5,200 ft 300 psig 250°F 550°F 400 hp 1,585 m 21 barg 121°CBombogenesis happens when the atmospheric pressure in a low-pressure system drops rapidly, intensifying a storm and creating a bomb cyclone. Advertisement This planet has a lot of ...A bad check valve on an air conditioner, heat pump or similar HVACR equipment can show up as abnormally low or abnormally high suction line pressures, or as abnormally low or high superheat. Experts suggest …The elevation head of a piping system is the physical difference in height between a lower and a higher liquid level! It results from the sum of the suction head and discharge head. Figure: ... For pumping water with a density of ϱ = 1000 kg/m³ the maximum suction head at an ambient pressure of 1 bar is thus 10 meters.Unit is tripping out on high head(600psi). Upon starting, the unit runs for 5-10 minutes as discharge slowly but steadily approaches 600psi and begins to continuously short cycle. The suction comes up and remains steady at about 180psi as the head pressure continues to climb. Outdoor ambient temp 68 degrees, indoor ambient temp 72 …Feb 26, 2022 · Causes of high head pressure low suction pressure. For any HVAC system, The two pressures are to be maintained. Excessive refrigerant, higher outdoor temperature, improper cleaning of coils are the main reason for both pressures. Suppose the evaporator is not getting sufficient refrigerant from the compressor. A cold suction line (low superheat) with low suction pressure is a symptom of low evaporator air. A liquid restriction would result high superheat (warm suction …Jan 1, 2012 · went to customer home check on r22 heat pump cut out ,the pressure on high side is 400 lbs,and low side is 30 lbs in cooling mode,and it run 3mins and cut off each time u turn it on,and running in heat mode the pressure is normal,but still cut off in few mins,check the line voltage is normal,condenser coil is clean,indoor coil in new with tev,an... Manitowoc model SD0592N remote condenser R404a Got called for no ice checked machine found suction pressure 140 and high pressure 250 , no cooling to plate can not figure out what is causing the high pressures. Maybe bad headmaster on remote condenser but it so 500psi on valve. any suggestions would be appreciated.Most HVAC systems are designed for a maximum outdoor ambient temperature of 95° F. So, if the temperature is at or above 95° with high humidity, then you will likely also experience high head pressures. Or at least above normal head pressure for the air conditioner or heat pump. The system is working hard to remove not only the …Came across another Rheem recently with a high head pressure in heat mode. Its a RPPL. Head pressure slowly climbs to above 600, suction pressure is normal not low at all. Airflow inside is okay... static pressure is .7inWc. Coils are clean. In cooling mode the charge looks damn near perfect... 11 degrees subcooling and 9-11 degrees superheat.High suction, low discharge. So I just installed a complete Rheem 5 ton, 14ajm series system ast november. HO tells me its not cooling as good. I arrive to find a loud compressor, 200 psi suction and 275 head. First thing that comes to mind is bad valves. A few minutes later the compressor cuts off on internal overload.Came across another Rheem recently with a high head pressure in heat mode. Its a RPPL. Head pressure slowly climbs to above 600, suction pressure is normal not low at all. Airflow inside is okay... static pressure is .7inWc. Coils are clean. In cooling mode the charge looks damn near perfect... 11 degrees subcooling and 9-11 degrees superheat.Oct 1, 2018 · ABOUT THE AUTHOR: Jim Frankland is a mechanical engineer who has been involved in all types of extrusion processing for more than 40 years. He is now president of Frankland Plastics Consulting, LLC. Contact [email protected] or (724)651-9196. Use drag- and pressure-flow equations to analyze fluctuating output. What causes high head pressure and low suction pressure? Excessive refrigerant, higher outdoor temperature, improper cleaning of coils are the main reason for both pressures. Suppose the evaporator is not getting sufficient refrigerant from the compressor. It will not be able to provide proper cooling in the system.1. Even though this is not the cause of high suction, Clean The Evaporator, because it needs to be clean. If it's dirty, it causes LOW suction pressure, and causes inexperienced techs to overcharge a system. 2. Just for kicks, and for a learning experience, check the system vitals, and record the pressures, water temp entering and leaving the ...Location Brooklyn Posts 42 Post Likes HIGH SUCTION PRESSURE / LOW HEAD PRESSURE ISSUE Hey guys, need some help i am working on a carrier unit with …Justin Berman has one of the most important jobs at Dropbox. As head of security, he oversees the company’s cybersecurity strategy, its defenses and works daily to keep its more th...That is correct the outdoor check valve should be all the way open, but if it were partially closed or partially open, as you stated, --"it would result in a partial liquid line restriction," resulting in LOW suction pressure, somewhat HIGH head-pressure, also somewhat High super-heat, and HIGH sub-cooling, with usually low compressor amp-draw.
All centrifugal pumps should have minimum flow protection. If the existing pump is severely oversized, replacing it with a properly sized pump (or impeller in some cases) may be the only appropriate corrective action. Select new pumps with the normal operating range between 80 and 110 percent of BEP, and protect them from minimum …. Samantha brown luggage website
May 5, 2016 · The SC might be normal , but the normal head for a r410 system w/ a 68* ambient should be closer to 300psi and the normal suction press should be closer to 110psi w/70* IDB. Those p/t's sound more like r22. kdean1, buttwheat liked this post. As others have said it sounds like a TXV and maybe low on juice. How to Check Subcooling. Attach the thermometer to the liquid line. This time, near the condenser. Then take the head pressure in Psi and convert it to the temperature on the pressure/temperature chart. Assuming you are dealing with a R22 system, let’s say the head pressure is 260Psi. This will convert to 120F.Well, now it has very low suction pressure plus suction-line icing-up; entirely different symptoms: Simple, when checking for restrictions: ... low suction & head pres.; high superheat & subcooling; low amp draw; icing & poor Relative Humidity Control. Would the head not be higher than normal? Reply . 07-10-2014, 02:24 PM #17. udarrell.Jan 1, 2024 · High suction pressure low head pressure: In the air conditioning system if the suction side the pressure is increasing continuously then the low head pressure will be increasing inside the system. When the refrigeration system continuously faces the less temperature the amount of capacity will be also decreases. Thread: very high head pressure with very low suction pressure. Thread Tools. Show Printable Version; 01-03-2012, 09:48 PM #21. ARTICHILL. View Profile View Forum Posts View Forum Threads Regular Guest Join Date Jan 2010 Location Heat Pump Belt Posts 92 Post Likes Likes (Given) 0Blue --> "True Suction" Low Pressure; Red --> High Pressure (either refrigerant line) Place an insulated temperature probe on the liquid line between the evaporator coil & O/D expansion valve. Allow the unit to run for at least 10 minutes. Monitor pressures and temperature as the system operates.High discharge pressure, high suction pressure, high subcooling, and high compression ratios are all symptoms of a (n) _____. A. inefficient evaporator B. restriction C. refrigerant overcharge D. low refrigerant chargeWhen the device overfeeds, there are high chances for both the suction pressure and the discharge pressure to increase. 3. Reduced airflow through the evaporator. One of the most common reasons for low superheat is due to reduced airflow. With reduced airflow, there isn’t enough warm air to vaporize the refrigerant.High discharge pressure, high suction pressure, high subcooling, and high compression ratios are all symptoms of a (n) _____. A. inefficient evaporator B. restriction C. refrigerant overcharge D. low refrigerant chargeLow suction/High head. I have a carrier 38QRF024300 with a 40QNQ024 unit I be been having issues with. Originally my readings were 157# suction (410A) and 275# head reading 7,5.2, and 4.1 amps when RLA is 12.8; with 5 degrees of subcooling. Ambient is 80 in parking garage.Feb 17, 2015 · Low suction/low head pressures. Bevearage air Prep table not cooling-. R134a, AEA4440YXA hermetic. pressures were about what they should be for a cap tube system (roughly 150/25 psi) but just blowing around warm air. Plate said 7 oz of R134A but I pull out 2 lbs so I evacuate and recharge with 7oz and now the pressures are way down. .
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