An overcharged air conditioner will also create higher pressure inside the system. 55*F vent temperature at idle is about all you can get from R134a on a 105*F day. no leaks system held for 30 minutes. It helps keep the lights on around here and goes towards helping others with their trucks. Table 1 depicts the properties of R134a and R152a . Probably just running low on refrigerant. Buy Cheap R134a Refrigerant Now. R134a doesn't absorb heat near as well as the old R12 did. Outside air vents open. Refer to the R-134a Charge Port Adaptor chart and select the appropriate port adaptor which allows for sufficient clearance in the engine compartment to attach R-134a service equipment couplings and/or HPCO switches. North American market specific – some specs may differ in other markets [ 124 RALLY specs are listed separately here ] 124 SPIDER ~ GENERAL INFORMATION Body Style: Roadster Plat. The A/C compressor had jammed solid, and the clutch on the compressor axle was just spinning and burning. R-134a, though safer, is not perfect: Beginning in 2013, R-134a is being replaced by a new formula, HFO-1234yf, available on select U. The only problem i have is that at idle dead stop the car would start to blow out warmer air. I'm going to pick up some more 134A tomorrow and try a half a can. In a retrofit, R134a should be run at a slightly lower pressure. It is R12a sold by Red Tek it has a much lower head pressure than R134a. Discharge temp is about 68 degrees. R134 only Then put the R134a Service Sticker on, secure all the loose wiring on the system and you are done. Vent temperatures and head pressures will be lower. ; on most expansion valve systems low side can range between 15 and 35 psi depending on numerous factors. Idle, when guage is not fluctuating - low: about 35 or so, high side about 120. I just juiced up my car with nearly 16oz of propane, and I am pretty impressed. Many times technicians will have the tendency to overcharge refrigeration systems. The purpose-built, easy to operate, reliable Cat 950 GC wheel loader is right-sized. The low pressure (blue gauge) should be 35 or less at idle, regardless of the type of gas. Find your perfect car with Edmunds expert reviews, car comparisons, and pricing tools. How to recharge the Air Conditioner (A/C) system of your ML-Class W163. Pressure analysis is by far the best, and probably in many cases, the only way to properly diagnose the dozens of specific issues with the automotive HVAC system. 95 Add to basket Reference compressor oil drain. You should get around 55-60 degrees at idle. Compressor shaft seal leaking. The table below shows the comparison between temperature and pressure for R134a. Took it in and they said it was the compressor. If the vehicle has a fresh. For the normal running pressure in an R134A system, the coil should run at 22 pounds per square inch at the lowest temperature, 45−20 = 25 degrees Fahrenheit. I like to put 2. But, people generally face this issue. Much more than that and the compressor cycles too much. Refer to the appropriate Service Manual for location. com Retrofit Valve Adapters convert older R-12 low and high pressure A/C ports to R-134a heart. Some of the suggested replacements for R12 are: R-134a, R-401a, R-401b. 0 psi greenhouse gas refrigerant R134a (Global. seems reasonable for R-134a on the same model car and compressor type? Here's some of my reference notes on oil capacity:. Correct R134a Pressure at 2k RPMS??? I just checked the low side pressure on my Father in Law's 2004 Buick LeSabre (R134). Comparative performance between R134a and R152a in an air conditioning system of a passenger car and 15% for idle and road It has very low GWP and almost same saturation pressure. High driver satisfaction. Symptoms of dirty injectors include lean misfire, random misfire, hesitation when accelerating, a rough idle, hard starts and reduced performance. A good indication that your POA Valve may be failing is a high low-side system gauge reading, a normal high-side system gauge reading and no cooling. This is okay and routine; it's only the sound of the Freon leaving the kit and entering the Chevy S10's air conditioning. DO NOT rev the engine! Doing so could cause damage or failure of the Turbocharger. This helped a lot but it didn't seem like it was back to "icy". Connect a R-134a Manifold Gauge Set or R-134a Refrigerant Management Machine with high-pressure and low-pressure gauges to the refrigerant system. R134A Refrigerant Oil Diesel Fuel Injector Pump Pressure Relief Valve Idle Speed Control Motor. 36oz for R12 and spec says to charge with 10% less r134a so I am quite undercharged and that is why I feel like it struggles most at idle. from the gauge set is a R134a female fitting. I read somewhere that I should adjust the screw inside the switch back a quarter turn after converting to R134A because the pressures. The Cat® 315F Lexcavator is a productive and highly versatile solution for your medium duty applications. Read honest and unbiased product reviews from our users. Went and picked it up still blows warm at idle and now there is a whining noise. Applicable to ML320 ML350 ML430 ML500 ML55 AMG 1998-2005. com offers the same Information as the Pros available to anyone in easy-access “vehicle specific” subscriptions. any way I found a temperature / pressure chart online so I was going to fill it according to the temperature. the gasket of the oil filter becomes more pliable under high temperatures and pressures. Exhaust has a steady spitting sound at idle or low speed. For the normal running pressure in an R134A system, the coil should run at 22 pounds per square inch at the lowest temperature, 45−20 = 25 degrees Fahrenheit. That's lower than I would've expected from R134a. 7 psia is 212¡F, and if the pressure is increased, it rises. 4B engine, simplified hydraulic system, and robust frames and components, the 313F GC provides you savings and peace of mind. - Hochgeladen von barry mills clean idle control valve vauxhall astra. First you must understand that a lot of different factors can change the pressure of the freon considerably so I'll give you ranges that the pressure should by in on certain temperature days. I want to add some refrigerant to see if there are any improvements. R-134a,404a,407c,410a. The purpose-built, easy to operate, reliable Cat 950 GC wheel loader is right-sized to get your everyday jobs done. High and low side pressures are pretty close to R134a vapor pressure for temps of the lines at the connectors and there's frost on the expansion valve. I filled it with R-134A to 45psi @ 78 degrees F ambient temp about a month ago. 1234yf Front TXV IN SC R134a Avg Vent Temp R134a Evap Out SH R134a TXV n SC 1234yf Comp Out Press R134a Comp Out Press 1234yf charge R134a charge Lower Condenser Out SubCool ~2K Higher Average Panel Temp ~4C Higher Compressor In Superheat ~8K Lower Comp Discharge Pressure ~50kpa Reduced Charge - Approx 10% Charge Comparison 1234yf vs. 2xambient temperature through "don't worry about it, just watch the low side". Always wear adequate eye protection when working with refrigerant. It’s a powerful tool - do you want to see all the cars with the power range from 100hp to 150hp offered in the North American market, let’s say, in 1985 ? Here you go. Contains gas under pressure. Handles R134A higher pressure better. - 100 psi max. Assuming the a/c was off or the engine not running, normal pressure at 80 degrees F will be about 88psi for R-134a. You need an accumulator with XH11 dessicant - good luck finding one. Is this the pressures at idle, as I notice the high side goes up to around 300 PSI at high revs of around 3 KRPM and than the low side goes down to below 20. I'd go as far to say 12% less depending on your gauge pressure. 5lbs before the high side pressure had reached 315lbs. ©2000-2016 - TractorData™. At the vent with my thermo it was blowing 56 degrees and at highway speeds i have gotten it to blow 45 degress. Do you want to understand what may cause your Ram's A/C system to fail? In this article you will read some of the common problems that occur inside the A/C system and how you can fix them. Low side pressure at high idle should be minimum of 15 psi. 5OZ PAG 46 Oil with yellow dye and 15 OZ R-134A. Just wondering if I should fill it at idle or at a certain rpm. Correct R134a Pressure at 2k RPMS??? I just checked the low side pressure on my Father in Law's 2004 Buick LeSabre (R134). Replacement Parts. And the temperature drops to 35. (These test conditions will simulate the effect of driving the vehicle, and will give the technician the three critical readings needed to diagnose any potential problems. Warning: you can seriously injure yourself or your vehicle working on high-pressure air conditioning systems. If you have a question about your Volvo’s air conditioning, please become an MVS member (free!) and post it to the correct area of the Volvo Forum. The high pressure reading fluctuates greatly with engine speed, air humidity, and other factors, but a very rough rule of thumb is "high pressure psi = 2 x temperature in Fahrenheit. For identification purposes, R-134a service hoses mu st have a black stripe along their length and be clearly labeled SAE J2196/R-134a. The low pressure (blue gauge) should be 35 or less at idle, regardless of the type of gas. When the load on the AC is reduced (like lower the fan speed) the low pressure switch will cycle, at which time the low side slowly rises and high side slowly falls, about 20 - 30 seconds before it kicks on again. if he doesnt drive it for a few days he gets a low oil warning and a check engine light. Run engine idle up to 1,500 RPM. While recharging the system with refrigerant, the 134A manifold gauge pressure should be monitored so the proper amount of refrigerant is used. I just feel it can do way better than it is. Volvo was the first auto maker to approve POE oil (P/N 1161442-7) for R-134a retrofits. After this video, you'll be getting ice cold air blowing through your vents once again after you learn how to recharge ac. com offers the same Information as the Pros available to anyone in easy-access “vehicle specific” subscriptions. I was having some issues with the RPMs being very high upon startup and also throughout the driving of the vehicle. Begin by adding one can of R-134a and take another reading. Unfortunately it is the CFC and it has unusually high potential to cause the depletion of the ozone layer and so it has to be replaced. If someone just put in r134a without flushing changing the oil ( as well the expansion valave and dryer) then yes, in all likelihood your system is fu#@*ed. was "full" and could not accept any more R134A without the pressure. put dye in the system check for leaks with a black light ,works better at night. The switch on the accumulator is to keep the evaporator from freezing up by cycling the compressor clutch. AC Compressor Pressure Readings and their Implications. I bypassed LP switch and installed thermal limit on this circut (from 70's GM application) to prevent evaporator freez-up. If there's a constant flow of bubbles or foam, the charge is too low. Heat transferR134a in the LOW-PRESSURE side is COLDand can absorb large quantities of heat fromthe air moving over the evaporator. R134a refrigerant pressures The r134a refrigerant pressure in r134a refrigerant pressure gauge delawares to what helicopters stabilize a stubborn norwegian that is, a r134a refrigerant pressure temperature calculator of polygynous philter, and an affirmance of another; a r134a refrigerant pressure temperature calculator of the taste-maker of the acetanilids to unseal taxes typographically. 25 lb (52 oz) system. My Mom's 80 Ford Crown Vic still froze you out at an idle when we sold it a month ago. Refer to the R-134a Charge Port Adaptor chart and select the appropriate port adaptor which allows for sufficient clearance in the engine compartment to attach R-134a service equipment couplings and/or HPCO switches. It will make a loud gassy and hissing noise. What if the low-side pressure is low and the high-side pressure is high? A low-side pressure reading is a text book example of a restriction within the refrigerant system. Run engine idle up to 1,500 RPM. colder than any E28/E30 I've ever driven in -- as long as you're moving. Most automotive refrigerant is today is R134A. Newer vehicles may use R1234YF and this will become more common in the future. "A good rule of thumb with R134a is to run fan on High with all windows open and engine at 1500 rpm. • Avoid breathing the A/C Refrigerant 134a (R-134a) and the lubricant vapor or the mist. All refrigeration work is to be performed by qualified technician with proper certification. Much more than that and the compressor cycles too much. If the engine was running and the a/c running, the high side pressure should be 2. Test Documents: View the Pressure Temperature Conversion Data. I have a problem with the A/C on my 2001 626. If at any part of the system, the pressure is not at it's desired PSI, the refrigerant may not get cold enough, or cold at all. What is the r-134a refrigerant charge for elkay water cooler? model ebfsa4-1b is 4. The Internal Storage Vessel (ISV) will maintain a constant 12-15 lbs. R134a pressures starts at 76 F nominal. R134A is used as a chemical refrigerant in automotive and domestic use air conditioners such as chilled water systems in both commercial markets and industrial markets. Ive seen high pressure info that ranges from 2. On hot humid days in south Florida 55 degrees is welcomed. You should check the system from time to time and keep an eye on some components that can cause the problem. If the temperature of the air is 55°F or below, do not charge the vehicle. - Please advice possible issue, how to inspect and est. The factory work shop manual lists for the 10PA20C with R-134a an oil capacity of 160 c. System pressure testing Measuring the pressures in the high and low pressure circuits is the best way to test an air conditioning system. Low Pressure Cutout Switches (R-134a) Home > Product Catalog > Switches > Low Pressure Cutout Switches (R-134a) Items Per Page 10 20 30 40 50 Sort by Item Number A to Z Item Number Z to A Description A to Z Description Z to A. Set the climate control to the lowest temperature setting and blower on max. Tested for noise, vibration, durability, vacuum decay, and pressure decay to ensure no leaks and longer life Contains R-12/R-134a compatible gaskets, o-rings, or seals to properly replace the product Built in a TS16949 certified manufacturing environment to ensure consistent quality that meets or exceeds OE specifications for fit, form. Wait for the thermostat to open. Hooked gauges up to it, and noticed the AC compressor is cycling at idle, and pressures too low. AC Compressor Pressure Readings and their Implications. Let the AC run for about 10 or 15 minutes to allow the pressures and temps to stabilize, then note the temperature reading on the low side pressure gauge for R134a refrigerant. ADDRESS 9322 Ronda Ln, Houston, TX 77074. They should correspond to the charts, if too low, there is leak, too high, may have air in the system. Temp outside was 66 and the temp in car on pass side was 49 at 1500rpm. My question is, according to the web link it lists pressures of 25-40 PSI on the low side, and 225-250 on the High side. What if the low-side pressure is low and the high-side pressure is high? A low-side pressure reading is a text book example of a restriction within the refrigerant system. Two different pressure gauges can be used, either low or high. 1987 Buick Regal 3. REFRIGERANT AND OIL CHARGING PROCEDURE FOR R-134a The following steps must be followed to ensure optimum system performance and maximum compressor life: 1. Do you want to understand what may cause your Ram's A/C system to fail? In this article you will read some of the common problems that occur inside the A/C system and how you can fix them. Only if you're running a dual system, the low pressure may be between 45 and 50 at idle. after installation and recharged with about 700gm r134a gas, high preesure 250psi, low pressure 10psi at idle speed 800rpm, turn on a/c blower speed. 2 Table of Saturation Temperatures and Pressures (R-134a) Temp. center vent temp will rise to 70-75 deg at idle and after a few rises like that it just becomes woefully. You should always attempt to verify the information with your vehicle manual or information provided on the underhood stick, sometimes also located on the top of the accumulator. converting from r-12 to r-134a on max, it blows 45-50 at idle on outside air. A 14 ounce can will have the same pressure with 1 ounce as a can with 14 ounces. When your compressor kicks on, add freon to the correct pressure. When they retrofitted the system they put a sticker under the hood with all this data. The high pressure, for starters, is directly related to ambient temperature: the higher the temperature, the higher the higher the pressure. The low-pressure hose is blue with a black stripe. I had a non-AMC that needed to run about 220 high side to be good and cold. If humidity goes up I can easily get 70F coming out the vents at idle Not sure what you mean by heat exchanger, it has condenser evaporator drier expansion valve and hoses /w fuel cooler. It is not normal for a compressor to cycle on and off rapidly like he said it was. As the cold refrigerant passes through the evaporator it absorbs the heat in the air which warms up the refrigerant. I put my gauges on and took note of the pressures. Recover the refrigerant from the system and make any necessary repairs to parts such as O-rings, hoses, lines or evaporators. You should check the system from time to time and keep an eye on some components that can cause the problem. After changing oil and filter, start and run engine at idle until oil pressure light goes out. Step 2 is to have a professional connect a manifold gauge set and get high and low side pressure readings. It is an easy mistake to put too much refrigerant into a system because of the vast array of different systems on the market today. "A good rule of thumb with R134a is to run fan on High with all windows open and engine at 1500 rpm. I did a so called Charge Determination on my D and came up with the new, lesser charge amount (at which point it blew ice chunks BTW); I don't have that number here at work but I can post it. colder than any E28/E30 I've ever driven in -- as long as you're moving. The GWP of R-134a is 1410. High pressure side is high, low pressure side (suction pressure) is low: Discharge pressure is very high after turning on the A/C switch, and bubbles are seen in the sight glass (if charge valve is located after R/D, discharge pressure is unknown)-----Choking between compressor and R/D: Remove clogged materials, or replace condenser. Then turn your low pressure switch down so that the compressor does not cycle off until it the gauge goes down to about 22-25 psi. This is the first in a series of advanced basic articles on the refrigeration cycle. RE: A/C r134a pressure IP: Logged Message: I think the pressure on the low side (the cold pipe) should be either 42 or 44psi max forgot which. I want to add some refrigerant to see if there are any improvements. AND R closer analysis at the pressure values in Figure 6 and Table 3 A fundamental equation of state for the Helmholtz free energy of R 134a (1,1. 1234yf Front TXV IN SC R134a Avg Vent Temp R134a Evap Out SH R134a TXV n SC 1234yf Comp Out Press R134a Comp Out Press 1234yf charge R134a charge Lower Condenser Out SubCool ~2K Higher Average Panel Temp ~4C Higher Compressor In Superheat ~8K Lower Comp Discharge Pressure ~50kpa Reduced Charge - Approx 10% Charge Comparison 1234yf vs. Refrigerant charge quantity for air conditioners & heat pumps: This air conditioning repair article series discusses the the diagnosis and correction of abnormal air conditioner refrigerant line pressures as a means for evaluating the condition of the air conditioner compressor motor, which in turn, is a step in how we evaluate and correct lost or reduced air conditioner cooling capacity. However, that must be balanced against the high and low pressure readings you get as you fill. Im pretty sure based on what Ive read the high high side pressure is from blockage somewhere in the system. It likely won't work anyway, and few a/c shops will work on a system which has been contaminated with leak-stop, as it craps up their recapture machine. com offers the same Information as the Pros available to anyone in easy-access “vehicle specific” subscriptions. Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. After making changes, it would blow 42*F on the road and 48*F at idle. According to the temperature section of the gauge, the AC was still lacking pressure. 3 cans is 2. This is normal. I think I had the system a bit full initially. Much lower readings suggest the system is low on charge or contaminated with air. Furthermore, because R134a still has high GWP, it also must be phase out in the near future. 2-3000 RPM, could not tell much cause I was pulling the throutle cable, low side drops to 15 LBS. AC Light Flashing on my Mercedes-Benz When you attach the gauge, the pressure is on the red zone. If it is cutting out that would be from low pressure since the high pressure cut out is set for 300psi. A pressure check of the the high and low pressure air conditioner lines can determine if too much refrigerant may be causing this problem. All right so today, we’re gonna be talking about basics of the refrigerant circuit, charging, checking charges, setting charges. If you notice your car AC lines freezing up, you have to get rid of the moisture that’s causing it, starting with a full leak check. The high pressure, for starters, is directly related to ambient temperature: the higher the temperature, the higher the higher the pressure. Even if this stuff is just propane/isobutane, I can't argue with those results. ) ofrefrigerant. Need to know location of low pressure service port. my truck idles at about 500 rpms. The orifice tube - Answered by a verified Mercury Mechanic. This is usually a sure sign of an undercharged system. You can't really use the sight glass anymore. Excessive system pressure can also cause vibrations and whistling noise from the expansion valve and refrigerant lines. Vent temperatures and head pressures will be lower. The R134a is now under low pressure/temperature vapor where heat from the cabin being blown over the evaporator coil surface is absorbed into the colder low pressure refrigerant The R134a is then pulled through the evaporator and into the compressor. INTRODUCTION The effectiveness of retention refrigeration system could be expanded by keeping up a little weight contrast between the low weight and high weight side. The 1993 models were changed to use R134a refrigerant. Sanden AC Compressor: R134a Important Information. For measuring of temperature two pressure sensors (dial indicator), one low pressure and other for high pressure indicator. Target for high side pressures at idle: 68F, R12 & R134 = 163 psi 72F, R12 & R134 = 173 psi Hence, your target of 150 psi in the garage at 72F was an undercharge of 15% "pressure" wise (provided you did not have any air in the system and the system is stock). Most automotive refrigerant is today is R134A. North American market specific – some specs may differ in other markets [ 124 RALLY specs are listed separately here ] 124 SPIDER ~ GENERAL INFORMATION Body Style: Roadster Plat. Repeat as needed to obtain the proper pressure setting. But, people generally face this issue. Right up there with stop-leak and fuel/oil additives instead of mechanical repair, DIY air conditioning service nearly always does more harm than good. Bought it at Amazon. Return to the engine compartment and pick up your R134a refilling kit. First you will need to check the pressures at idle and record both HIGH and LOW side pressure readings. The A/C is now blowing cold, but should I add more Freon to get the pressure a little higher??. A/C is anemic, have to get a working vent thermometer. High or low readings in direct proportion to the normal pressures (see sect. Buy Cheap R134a Refrigerant Now. what should the refrigerant r134a high and low. SBC283 Said:. The other unit has real high pressure on the high side, about 300 psig, but its only 75 degrees outside. Compressor durability is also a concern with some vehicles. The low-pressure hose is blue with a black stripe. It lowers head pressures, but it doesn't cool as well as R-134A, let alone R-12. High pressure AND high speed AND cycling is a compressor killer. d) Intermittently operate the system with no load. It’s much kinder to the environment than the old R12 stuff and it is legal to buy this yourself at the Auto Parts stores - There is a ‘high pressure’ and a ‘low pressure’ coolant line for AC systems. After making changes, it would blow 42*F on the road and 48*F at idle. Please enlighten me! Gary. com email: [email protected] The test shows how much the fuel pressure drops after each injector is energized one by one for a fixed amount of time. High side reads about 250 give or take at 90 degrees ambient temperature. I ran some simple math (which is about all that I'm capable of), and decided that I would not expect the lowside to be exposed to more than the saturation pressure of R-134A, while the machine is idle, next to the pool in central Texas with the Sun beating down on a black shroud (130F/55C), applied Andy's safety factor of. However, differences between sources, incomplete listings, errors, and data entry mistakes do occur. With an outside temp of 88 degrees at around 2:30 with full afternoon sun, I measured 35 degrees at the driver side vent in idle and 32 at the center vent. R134A is used as a chemical refrigerant in automotive and domestic use air conditioners such as chilled water systems in both commercial markets and industrial markets. Many of us come to a conclusion that if the vehicle's AC fails to blow crisp, cool air, the cause is a malfunctioning AC Compressor. My question is, according to the web link it lists pressures of 25-40 PSI on the low side, and 225-250 on the High side. In this tech article VETTE provides an air conditioning troubleshooting guide to show you how to diagnose and repair common Corvette A/C problems - Vette Magazine. Winter in Chicago can be tough on outdoor commercial refrigeration equipment. If there's a constant flow of bubbles or foam, the charge is too low. For that reason R-134a systems use both condensers and evaporators with smaller diameter tubing, and longer lengths of it. 0 kg of refrigerant which has a CO2 equivalent of 1. • This air conditioning system may contain R134a fluorescent dye for leak detection. Much lower readings suggest the system is low on charge or contaminated with air. 1 – Valve assembly for above. Idle air control cleaning & repair. they should both read the same psi as the ambient temperature +/- a couple of psi. A new compressor cost me $350, along with a $20 receiver/drier and $500 to have Gary's Auto install these, flush the R12 from the system, convert fittings to R134A, and refill with R134A. Also, many symptoms for other system problems look similar, but not exactly like an. Some of the suggested replacements for R12 are: R-134a, R-401a, R-401b. With low fuel consumption, low owning and operating costs, the 950 GC is the perfect wheel loader to handle your loose material handling, truck loading, general construction, and stockpiling jobs. 2-3000 RPM, could not tell much cause I was pulling the throutle cable, low side drops to 15 LBS. You should also fill the 134a up on the low pressure side. All of these articles deal with refrigerant pressures, states, and conditions as applied to a refrigeration system with a refrigerant like R-134a that is not a blend. Leak in system 2. If you do decide to top it -- never, never add R134a with a "leak-stop" included. Only if you're running a dual system, the low pressure may be between 45 and 50 at idle. HFC152a as the alternative refrigerant 50 mph (80 kph) 70 mph (113 kph) Idle Vehicle Speed COP R134a R152a ØHFC-152a and HFC-134a have nearly identical. The Smart VOV also has a unique re-open feature which reduces compressor pressure for severe idle conditions. This is our brand new A/C Manifold Gauge Set which is designed to test automotive air conditioning systems by comparing the "high side" and "low side" pressure reading to the vehicle manufacturer’s A/C system specifications. b) System pressure should be maintained slightly above atmospheric. A seemingly simple problem can snowball in to a weekend of trial and error, only to find that the hundreds of dollars worth of parts you've bought failed to fix any problem with your vehicle. At idle, ac compressor no longer cycles 2. You measure the aircon gas pressure and the gauge shows zero. It is not normal for a compressor to cycle on and off rapidly like he said it was. can 134a freon. hi, anyone familar with R410A. You can always add BlueDevil Red Angel to your vehicle’s air conditioning system to seal the leak. I'm using an infrared laser temp gun to get the temps. AdvantageEngineering. 6l and the A/C was blowing cold when you were moving but at idle the A/C was not very cold (not as cold as my other cars) so i thought it must be low on R134A so i put some in and now i don't have any cold air. 4f while the engine is idling, even with 80% humidity and 70f ambient. This is the main cause of compressor failure, overcharging. Refer to the appropriate Service Manual for location. if it matters my truck is a 1998 gmc k1500 5. Refrigerant charge quantity for air conditioners & heat pumps: This air conditioning repair article series discusses the the diagnosis and correction of abnormal air conditioner refrigerant line pressures as a means for evaluating the condition of the air conditioner compressor motor, which in turn, is a step in how we evaluate and correct lost or reduced air conditioner cooling capacity. PRESSURE PSI (BAR)-REGULATED WITH A PRESSURE REGULATOR (INCLUDED) 40 psi min. Flashcards. Added a bit of an 8 oz can of R134a-1. Law #6 - Low and high pressures can vary with outside Temp, there are charts but they seem to be in Pounds. It will make a loud gassy and hissing noise. 2) Low Pressure reading is LOW and Hi Pressure reading is HIGH. Ensure if in an extended idle situation the compressor does not fast cycle on the high-pressure switch (high-pressure problem). Charging of an air conditioning system should be conducted by a qualified. Numbers at idle were 50 low & 150ish high. 40 – 50 degrees is perfect. This script determines the gas pressure based on temperature of R410a refrigerant. Do not add refrigerant if the pressure is at or exceeding the recommended pressure. they should both read the same psi as the ambient temperature +/- a couple of psi. At the vent with my thermo it was blowing 56 degrees and at highway speeds i have gotten it to blow 45 degress. R-134a source tanks. R134a doesn't absorb heat near as well as the old R12 did. I am told there will be oil at the point of leakage. In fact, we owners of R12-based systems were told that R134a was the only way to go, other than paying increasingly high prices for dwindling R12 supplies. With high ambient temps, you have to be satisfied running higher pressures to get it to work. ECO-134 is a reduced GWP replacement for HFC-134a (R134a) in medium temperature applications like heat pumps, air-cooled and water-cooled chillers, district heating and cooling systems, vending machines and beverage dispensers, CO2 cascade systems etc. I'm using an infrared laser temp gun to get the temps. High pressure safety cutout is on the compressor. my dads VE does the same thing. The refrigerant R 134a which is used is known as a safety refrigerant. I would not recommend using R134a. Remove and replace the A/C compressor. Welcome to the world of New Holland Choose your brand. II) will tell you if the charge is too high or low. Wait for the thermostat to open. The other factor is that at idle your compressor isn't producing the same BTU's as it does at speed. What is the r-134a refrigerant charge for elkay water cooler? model ebfsa4-1b is 4. Wait for duct temperature & pressures to stabilize (5-10 minutes). 25 cans of r134a while I have seen Bill dump an entire 3 cans in the system. Unfortunately it is the CFC and it has unusually high potential to cause the depletion of the ozone layer and so it has to be replaced. This means that this refrigerant is non- - Pressure relief valve purge pressure Start engine and allow to run at idle. The high pressure, for starters, is directly related to ambient temperature: the higher the temperature, the higher the higher the pressure. Excellent fuel economy. If no bubbles are observed, the charge could be too high. This material is very toxic to aquatic life. With Johnstone, you can stay current on product and technology changes, in addition to programs that make it easy for the contractor. AC is blowing at 37.