Recently installed new Linear … Technically, it is both a motor and a pump, and it looks like a small, often dark-colored cylinder that it is connected to the condenser on one side… Having said that, here’s the scoop on system pressures in residential refrigerators running R-134a refrigerant: Low Side: About 2 psig, although I’ve seen these systems pull a slight vacuum, 0 to … In the case of R134a in a low temp unit (refrigerator), yes it runs at less than zero pressure, just slightly less. … Please help. What should the pull down pressure be at 40 degrees F, low and high side? I've included these readings and needed guidance on what these readings mean. R-134a pressure chart and other instructions on car A/C repairs. You use that reading and other data so you know where to look first and then … Post photos, respond to polls and access other special features. More than likely, the compressor is bad but can't be sure without pressure reads on the low side… Alright folks so we’ve gone over some of the basic facts about R-134a but now let’s take a look at some of the more interesting points about this refrigerant: 1. The refrigerator is not even 2 years old. The most efficient way to fill the compressor is by using the liquid R134a on the high side and gas on the low … Accessories – Pumps, Cooling Towers, Evap Condensers, etc, Components – Valves, Motors, Condensers, Evaporators, etc, Duct Systems Design, Installation & Practice, Piping Systems Design, Installation & Practice, Control System Design, Installation & Practice, Welcome from the Editor & Electrical Forum Rules, Pro's Forum: National Electrical Code (NEC), Pro's Forum: Calculations & Electrical Theory, Pro's Forum: Electrical Business & Marketing. I am following a recent repair where the compressor and receiver dryer was replaced and the fridge worked for a day according to the customer by another company. For cooling coil temperature -14 to -16 degree Celsius. The recommended pressure for a home refrigerator using R134A refrigerant is between 2 psig and 150 psig. LG LFX31945ST French Door Hi I got this 2014 used LG fridge in excellent condition the woman said it needs a compressor. Every Refrigerator have different size of Compressor when we charge Gas then Some Refrigerators Ready on zero (0 PSI) Running Pressure and some refrigerators ready on 15 PSI Running … Yes, excess freon would have to be vented with the system off, you only have to wait maybe 2 or 3 minutes after shutting it off and you will see pressure … Start charging the gas refrigerant from the refrigerant bottle to the low-pressure side of … At first I thought I had a clogged filter dryer. This can be done by reading from the pressure-temperature chart on the refrigerator. 134a has a high global warming effect (1300 times higher than CO2), is therefore under international control and should be avoided. Yes... we are 20 years old. For example: if the temperature in the refrigeration box ranges from 45 to 60 degrees Fahrenheit, then the coil temperature will be between 10 and 20 degrees Fahrenheit. Low Back pressure (LBP): These models are used to work in low evaporating temperature ranges , these are suitable for commercial refrigeration , deep freezers and house hold refrigerators as well. This variance between the coil and refrigeration box temperatures is what is called the temperature difference. The pressure for an ordinarily operating R134a is between 22 and 57 pounds per square inch (PSI). I personally now suspect a bad compressor. On the other hand, if you feel like your LG refrigerator water pressure is … The Pressure Changes with Temperature Variation, Normal Pressure Gauge in 134a Refrigerant System, How to Bypass Start Relay on Refrigerator. Is it Worth Replacing a Compressor on a Refrigerator? Every Refrigerator have different size of Compressor when we charge Gas then Some Refrigerators Ready on zero (0 PSI) Running Pressure … High side pressure too low. LG refrigerator low and high readings guidance - r134a Hello! Free shipping on many items | Browse your favorite brands | affordable prices. If the designer of the unit wanted to achieve -10F in the freezer case, they would design for 2 or 3 PSIG on the suction side … Transfair Engineering: Evacuation, charging, leak detection and performance test lines in the refrigerator … Now tight both the low and high-pressure side hose at position C & D respectively as shown in the image. Besides, it is useful in diagnosing an alternating current system based on normal pressure readings. Reason: Last line added. That’s why they are suitable even in places like the kitchen where the ambient temperature is usually high. These … A refrigerator's compressor is located at the rear of the appliance. Smartkitchenimprovement.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. She loves to help readers upgrade and furnish their kitchen with the best available products! Here at On-Time Appliance we use the large 30# cans but this is not piratical for the average person who owns a refrigerator… Also, it does not corrode metals like aluminum, copper, or stainless steel. The R134a exists as either gas or liquid throughout the refrigeration cycle. It has been in use since the early 1990’s and now, in 2019, we are beginning to see it’s popularity wane with the rise of the … Similarly, the coil should run at a pressure of 57 pounds per square inch at the highest temperature, which is 40 degrees Fahrenheit. Get a quick look at what an average A/C system looks like, along with the compressor manufacturer and what the specific R-134a … I can't remember the pressure but I know it was low. Currently working on an LSXS26386S. If the valve is only allowing a small amount of water through, the water may dispense slowly or with poor water pressure. Therefore in a … The refrigerant is 134a, and the ambient is 86 F. My gauges show 190 over 0 pounds gauge. Although the low … CrockPot Temperatures: How Hot Does a Slow Cooker Get? The compressor has no specs on pressures. Components – Coils, Heaters, Motors, etc. The #1 question asked by NEW MEMBERS. It can be … R134a Refrigerant mostly use for Refrigerators. Approximately 2/3 frosts, the remaining third condenses moisture but won't freeze the condensate. Pressure Temperature Pressure Temperature Pressure Temperature psig Degrees F psig Degrees F psig Degrees F (22)-62.38 37 42.00 145 109.4 (20)-55.02 38 43.00 150 111.5 (18)-48.85 39 … When the temperature in the refrigeration box is high, the coil temperature in R134a usually lowers to be colder than the box. 17-02-2011, 05:18 AM #3 mikeref View Profile View Forum Posts … Since it isn't overfull of refrigerant, I could only suspect it is too full of oil. As a low-pressure refrigerant system, the R134a is used in most home refrigerators as it is very effective and convenient for high-temperature applications. Readings that are higher or lower indicate an overcharged system. Low side reads 50 psi & high side 100+ psi. LG refrigerator low and high readings guidance - r134a. The pressure readings that are higher or lower than the normal running pressure can be an indication of an overcharged system. At the lowest temperature, the normal running pressure of the coil is expected to be 22 pounds per square inch. She is the primary writer behind SmartKitchenImprovement.com and hopes to share little tidbits of knowledge she’s picked up over her years as a mom and wife. Found service valves have been brazed onto compressor suction line and high side … That said I have noticed constant problems in the French door split frz models. This will cause high pressure to go directly into the compressor’s crankcase and cause high low-side pressures and low high-side pressures.” For more in-depth analysis of the symptoms your system can experience from these causes of pressure … Lg has been having massive compressor fail rate in units 3-4 years old. Unlike traditional refrigerants, the R134a is applicable and efficient in both medium and high temperatures. The R134a exists as either gas or liquid throughout the refrigeration cycle. Long story short, I need to know what the low side pressure should be at … Our 20th year anniversary is May 21, 2020. Holding plates will show a higher initial pressure… Best Automatic Pour Over Coffee Maker 2020, Keurig Coffee Maker Models Compared | Mini vs. Duo vs. Elite. LG LFX31945ST French Door Hi I got this 2014 used LG fridge in excellent condition the woman said it needs a compressor. At the lowest temperature, the running pressure of the coil should be 22 pounds per square inch. Which is conveniently the freezing temperature of water; and you'll … The temperature difference varies from one kind of refrigerant to another. Hence, the normal pressure gauge in R134a ranges from 22 to 57 pounds per square inch gauge. Understanding the running pressure of your refrigerator is an essential thing in handling and maintaining the refrigerant system. Just as with other refrigerants, the pressure of R134a is parallel to its temperature. No pressure … _____ 90 300TE 4 … Agnes is a kitchen and cooking enthusiast as well as a fitness fanatic. On a refrigerator, the initial low/high side pressures while it’s running really can’t tell you for sure if it’s a low or high side leak. I'm used to see about 0 psi +or-2 psi in low side… Ask Our Pros-Owner Assistance - NO DIY advice will be given. A restriction would cause a much lower low side pressure, but both are too high indicating an overfill. Currently working on an LSXS26386S. 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. Most refrigerators built after 1995 typically uses the R134a refrigerant. I mentioned this briefly above but R-134a was designed and began to see use as an alternative product to R-12 Freon, or Dichlorodifluoromethane. The most efficient way to fill the compressor is by using the liquid R134a on the high side and gas on the low side. Suction pressure or Back pressure of R 134a is 0 to 5 lbs psig. The boiling temp of R134A is -15 degrees F at 1 bar absolute pressure. The ARPA Zone/Open Membership Discussion Forums. For the highest temperature, the coil runs at a pressure of 57 pounds per square inch gauge. If the ambient temperature rises or lowers than normal, the pressure changes accordingly. However, when the fridge’s compressor starts running, the pressure may appear to be higher than normal. The high side … R-134a is the most common refrigerant found in automobiles today. As seen above, the operating pressure in the R134a refrigerant system is measured in pounds per square inch. It started getting warmer in both sections (top Freezer unit type) over several days. The low side pressure is the most appropriate for recharging the fridge. Remember, there are two sides to the chart; we have the low and the high. At ambient temperatures, the R134a is non-toxic and non-flammable. I am a beginning type 1 tech for refrigerant recovery. But, after running for a few minutes, the pressure should go back to normal. Holding plates will show a higher initial pressure, 10-15psi, and then drop to under 10psi. I haven't tapped the high side … Get the best deals on R-134a Refrigerant Industrial HVAC Gauges when you shop the largest online selection at eBay.com. Hello! Save my name, email, and website in this browser for the next time I comment. Recently installed new Linear Compressor. In the R134a, pressure can be determined at any temperature that ranges between -22 to 202 degrees Fahrenheit. I have a Kenmore bottom freezer refrigerator, model 795.71023.011. This is my first dual evaporator fridge. I really appreciate the questionnaire, that actually helps me out a lot. Last edited by Tesla; 17-02-2011 at 05:05 AM. It is a 134a system. Refrigerators using R134a refrigerants are designed to operate under moderate and higher temperatures. I already replaced it once. I am having major problems with my compressor. R-12 has been around since the 1930’s and was being used in automotive applications for decades until it was discovered that it harme… I am following a recent repair where the compressor and receiver dryer was replaced and the fridge worked for a day according to the customer by another company. Power Air Fryer Fan Not Working: What You Need to Do, Which Coffee Makers Makes The Hottest Coffee [Up to 205 Fahrenheit]. The R134a is a popular refrigerant used in a variety of modern refrigeration and air conditioning applications. Loop runs through the divider and water … The low side pressure is approx 9 PSIG. Get shopping advice from experts, friends and the community! Either you have a leak in the system or you have a bad compressor. For an evaporator system like this, the pressure will drop to 3 to 7psi as the box cools down. RULES for AOP - Owner Assistance and Contractors, Energy Efficiency and Building Performance Discussion NEW, Carnak Zone/Locked Areas - For Professional Member Only, Pro Forum: Refrigerants and EPA regulations **NEW, Pro Forum: Residential Refrigeration and Appliances **NEW, Pro Forum: Equipment Recalls and Bulletins **NEW, Pro's Forum: Building Science Discussions, Educational Forums - Open for all in the industry, Welcome to HVAC-Talk's Educational Forums, How to Submit Links, Articles and Quiz Questions, Frequently Asked Questions About Submissions, Physics, Thermodynamics, Fluid Flow and Combustion, Educational, Training & Reference Information, Manufacturer's Technical Information Links, Electrical Theory, Circuits and Electronics, HVACR Equipment, Components & Accessories, Accessories – Humidifiers, Air Cleaners, HRUs, Fans, Filters, etc. If you own a refrigerator built after 1995 chances are it uses 134a coolant. Headpressure is 150 to 185 lbs psig. and Stand by pressure is 85 to 95 lbs … Speaking of the temperatures, the lowest is considered to be 45 minus 20, which equals to 25 degrees Fahrenheit. Participate in over 40 different forums and search/browse from nearly 3 million posts. The running pressure of the R134a refrigerant is normally affected by variables like temperature. I am a beginning type 1 tech for refrigerant recovery. Found service valves have been brazed onto compressor suction line and high side on the filter dryer stub. Gain access to our free AOP (Ask a Professional) Section to get real answers for your questions. The trick here to note that when your refrigerant pressure is low (56-58 psi for R-134a), the vaporization temperature is 0C. I have no label on the fridge that indicates low and high operating pressures to compare to. When it comes to refrigerant systems, two pressure gauges can either be used, that is low or high pressure. If you realize that it remains high, then there is a possibility that the refrigerant system of your fridge is overcharged. This refrigerator is about 10 yrs old. , which equals to 25 degrees Fahrenheit water may dispense slowly or with poor water pressure time comment. Clogged filter dryer stub to 57 pounds per square inch gauge the normal running of... The normal running pressure of the temperatures, lg refrigerator low side pressure 134a pressure readings refrigerant is 134a, and website in this for. 22 pounds per square inch gauge door split frz models a low-pressure refrigerant,. The condensate should go Back to normal have the low side be 22 pounds per square inch in per... It comes to refrigerant systems, two pressure gauges can either be used that... That actually helps me out a lot efficient in both medium and high side … the recommended pressure for few... 0 pounds gauge remains high, the lowest is considered to be 45 minus 20, which to! 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